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frame relay
(144 results)-
Whitepapers
Multiuser Cooperative Relay Communication Employing Hierarchical Modulation
Mar 2010
The authors develop a scheme to improve data throughput for multiuser cooperative relay communications operating in half-duplex mode. Cooperative relay, while effective in mitigating fading...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Superposition Coding Aided Bi-Directional Relay Transmission Employing Iteratively Decoded Self-Concatenated Convolutional Codes
Mar 2010
In this paper, the authors consider coding schemes designed for two nodes communicating with each other with the aid of a relay node, which receives information from the two nodes in the first...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Power Bargaining in Multi-Source Relay Networks
May 2012
In this paper, the authors consider a multi-source single-relay wireless network, where the relay facilitates transmissions of the sources' signals to the destination. They study the relay power...
Provided by University of Alaska, Fairbanks
-
Whitepapers
Sparse Channel Estimation for OFDM Transmission Over Two-Way Relay Networks
May 2012
Compressed Sensing (CS) has recently emerged as a powerful signal acquisition paradigm. CS enables the recovery of high-dimensional sparse signals from much fewer samples than usually required....
Provided by Chinese Academy of Sciences
-
Whitepapers
Tightened Upper Bounds for Distributed Alamouti Code With a Non-Regenerative Relay
May 2012
In this paper, the authors consider a cooperative system with distributed Alamouti's code that includes a source, a non-regenerative relay and a destination. The relay uses the amplify-and-forward...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Exact Analytical Solution for AF Relaying Systems With Full Selection Diversity
May 2012
New, exact closed-form expressions are derived for the Probability Density Function (PDF) and the Cumulative Distribution Function (CDF) of the instantaneous end-to-end Signal-to-Noise Ratio (SNR)...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Performance Evaluation of Multi-Hop Multi-Branch Relaying Networks With Multiple Co-Channel Interferers
May 2012
In this paper, the performance of opportunistic amplify-and-forward multi-hop multi-branch relaying systems operating in the presence of co-channel interferences is investigated. Considering...
Provided by University of Pune
-
Whitepapers
Dual-hop Amplify-and-Forward Transmission With Imperfect Channel Estimates at the Relay
May 2012
With reference to the typical three-node Amplify-and-Forward (AF) relaying setup, where a single relay assists the communication between a source terminal and a destination terminal, the authors...
Provided by University of Bristol
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Whitepapers
Zero-Forcing Based MIMO Two-Way Relay With Relay Antenna Selection: Transmission Scheme and Diversity Analysis
May 2012
The combination of Physical-layer Network Coding (PNC) and Multiple-Input Multiple-Output (MIMO) is expected to improve the throughput of two-way relay network. In this paper, the authors propose...
Provided by Beijing University of Posts and Telecommunications
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Whitepapers
Selective Relaying in Multi-Relay Networks With Feedback Delays and Adaptive Modulation
May 2012
This paper evaluates the performance of adaptive modulation in multi-relay networks with selective relaying, under Nakagami-m fading. In the system model, the source decides independently whether...
Provided by University of South Florida
-
Whitepapers
Energy-Aware Relay Selection for Multiuser Relay Networks
May 2012
The authors consider a dual-hop relay network with multiple Source-Destination (S-D) pairs and multiple relays, where amplify-and-forward relaying strategy is applied and transmission among S-D...
Provided by University of Oldenburg
-
Whitepapers
Capacity Maximization in Cooperative CRNs: Joint Relay Assignment and Channel Allocation
May 2012
Cooperative Communication (CC) can offer high channel capacity and reliability in an efficient and low-cost way by forming a virtual antenna array among single-antenna nodes that cooperatively...
Provided by University of Washington School of Public Health & Community Medicine
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Whitepapers
Energy-Delay Tradeoffs in a Linear Sequence of Relay Channels
Mar 2012
In this paper, the authors aim at characterizing the gain induced by using relay channels in a linear network under both capacity constraint and realistic energy model. They express a general...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Analysis of Energy Efficiency for Packet-Based Transmission
Mar 2012
In this paper, the authors propose a new definition of energy efficiency with respect to a given target Packet Error Rate (PER). It is shown that some previous reported definitions are actually...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Performance Analysis and Power Allocation of AF Best Relay Selection in Generic Noise
Mar 2012
In this paper, the authors provide a high Signal-to-Noise Ratio (SNR) error rate analysis of Amplify-and-Forward (AF) best relay selection in networks impaired by Rayleigh fading and generic,...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Battery-Aware Energy Efficiency of Incremental Decode-and-Forward With Relay Selection
Mar 2012
The authors analyze the energy efficiency of reactive and proactive relay selection algorithms under the incremental decode-and-forward protocol. By taking into account the consumption of the RF...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Decode-and-Forward Based Strategies for Secrecy in Multiple-Relay Networks
Mar 2012
In this paper, the authors first study the Decode-and-Forward strategy for secrecy in a single-relay network. They propose a suboptimal Decode-and-Forward with Zero Forcing (DF/ZF) strategy for...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
CQI Reporting Strategies for Nonregenerative Two-Way Relay Networks
Mar 2012
This paper considers data exchange between two terminals in a non-regenerative two-way relay network. The authors first propose two efficient Channel Quality Indicator (CQI) reporting schemes...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Optimized Discrete-Estimate-and-Forward Relaying Strategy
Mar 2012
The authors study the conventional three node cooperative relaying problem. A Discrete-Estimate-and-Forward (DEF) strategy is presented, where a discrete alphabet is utilized for the relay's...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
On the Performance of Dual-Hop Space Shift Keying With Single Amplify-and-Forward Relay
Mar 2012
In this paper, single Amplify and Forward (AF) relay is placed between the source and the destination in Space Shift Keying (SSK) Multiple-Input Single Output (MISO) system. In SSK,...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Exact Error Analysis for the Piecewise Linear Combiner for Decode and Forward Cooperation with Two Relays
Dec 2010
Exact expressions are obtained for the Bit Error Rate (BER) for coherent and non-coherent Decode and Forward (DF) cooperative systems with two relays. The Piecewise Linear (PL) combiner, a close...
Provided by Indian Institute of Technology Bombay
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Whitepapers
Performance Analysis of a Multi-Relay Cooperative Diversity Network With Decode and Forward Relaying
Dec 2009
Consider a multi-relay cooperative diversity network consisting of a source, N relays, and a destination. For the transmission of a data symbol from the source to the destination, the relays...
Provided by Indian Institute of Technology Delhi
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Whitepapers
Coded Bidirectional Relaying in Wireless Networks
Sep 2008
The communication strategies for coded bidirectional (two-way) relaying emerge as a result of successful amalgamation of the recent ideas from network coding and the broadcast/interfering nature...
Provided by Aalborg University
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Whitepapers
A Novel Coding Scheme Based on GLD Codes for Cooperative Relay Networks
Aug 2008
A novel coding scheme called the distributed Generalized Low-Density (GLD) code is proposed for cooperative relay networks. In this paper, each relay node decodes and forwards some of the...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Transmission Strategies for Parallel Relay Networks Based on Superposition Coding
Aug 2008
This paper is concerned with the transmission strategies and relay selection for decode-and-forward Parallel Relay Networks (PRNs) based on superposition coding. The authors' focus is on the...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Low Complexity Acquisition of UWB Telemetry Data Packets With Clock Offset
Aug 2008
In this paper, low complexity acquisition of UWB telemetry data packets is addressed. In addition to the usual channel impairments considered of Additive White Gaussian Noise (AWGN) noise and...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
On the Diversity Order of AF Cooperative Systems With Inter-Relay Interference Cancellation
Apr 2008
In this paper, the authors analyze a full rate cooperative communication system using Amplify-and-Forward (AF) two-path relaying scheme with inter-relay interference cancellation at the relay. By...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Soft Decode and Forward of MQAM Modulations for Cooperative Relay Channels
Apr 2008
A novel approach for extension of soft decode and forward strategy into higher order MQAM modulation is proposed. A new soft mapping function is introduced to map soft bits onto a point in the...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Doubly Differential Communication Assisted With Cooperative Relay
Apr 2008
Doubly differential modem turns out to be a promising technology for coping with unknown frequency offsets with the pay of Signal-to-Noise Ratio (SNR). In this paper, the authors propose to...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Rake: Semantics Assisted Network-Based Tracing Framework
Sep 2012
The ability to trace request execution paths is critical for diagnosing performance faults in large-scale distributed systems. Previous black-box and white-box approaches are either inaccurate or...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
A Practical Fair Queuing Scheduler: Simplification Through Quantization
Apr 2011
The design of fair packet schedulers involves a tradeoff between implementation complexity, on one hand, and delay and fairness guarantees, on the other. In this paper, the authors present...
Provided by Reed Elsevier
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White Papers
Worst-Case Fair Bin Sort Queuing (WBSQ): An O(1) Worst-Case Fair Scheduler
Jul 2011
The Internet has evolved into a ubiquitous global communication medium that carries a constantly evolving traffic mix that is becoming richer as innovation and technology improvements spawn new...
Provided by Institute of Electrical and Electronics Engineers
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Case Studies
Expand Networks Accelerates Traffic Over the Wan
Apr 2008
Leader in the lift-truck manufacturing industry, Fenwick counts 2000 employees in France, divided between the headquarters, a factory and several branch offices all around the French territory....
Provided by Expand Networks
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White Papers
Simulation of Fading Channel and Burst Error Behavior of State-3 Memoryless Markov Model
Nov 2011
The paper contain a report on simulation of fading channel using Markov Model through a very simple and effective approach, The paper established the successful application of Discrete time...
Provided by Universiti Malaysia Perlis
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White Papers
Capacity (Cut-Set) Bounds for Multi-Hop Relay Networks in Erasure Channels
Jan 2012
This paper deals with the finding of capacity bounds for multi-hop relay networks in erasure channels. As importance of complex networks of nodes and relays and significance of erasure channels...
Provided by K L University
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White Papers
Secrecy in Cooperative Relay Broadcast Channels
Jan 2011
The authors investigate the effects of user cooperation on the secrecy of broadcast channels by considering a cooperative relay broadcast channel. They show that user cooperation can increase the...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Secure Communication in Multiple Relay Networks Through Decode-and-Forward Strategies
Jan 2012
In this paper, the authors first study the Decode-and-Forward strategy for secrecy in a single-relay network. They propose a suboptimal Decode-and-Forward with Zero Forcing (DF/ZF) strategy for...
Provided by University of Maryland
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White Papers
Capacity of a Class of Diamond Channels
Aug 2011
The authors study a special class of diamond channels which was introduced by Schein in 2001. In this special class, each diamond channel consists of a transmitter, a noisy relay, a noiseless...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Dynamics of Feedback-Induced Packet Delay in Power-Law Networks
May 2010
Dynamic interactions of various network-related protocols induced by the functional partition make the Internet to be complicated systems; details are hardly captured because of large-scale and...
Provided by Osaka University
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White Papers
On the Packet Delay Distribution in Power-Law Networks
May 2009
Measurement studies of the Internet topology have revealed that the degree distribution exhibits a power-law attribute. In this paper, the authors investigate packet-level delay behavior of...
Provided by Osaka University
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Whitepapers
An Adaptive Modulation Scheme for Two-Way Relay Channel
Aug 2012
In this paper, an adaptive modulation scheme for the Two-Way Relay Channel (TWRC) is proposed. The modulation used at each user is adaptively selected according to their own channel. When the...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Relay Selection and Power Allocation Based on Incremental Relaying for Two-Way Relay Network With Asymmetric Traffics
Aug 2012
Most of existing studies about two-way relay network rely on the assumption that two sources transmit with symmetric traffics, which is often unsatisfied in practical application. In this paper,...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Optimal Resource Allocation for Time Sharing Relaying System
Aug 2012
A time sharing relaying system model using Orthogonal Frequency Division Multiple Access (OFDMA) is investigated in this paper, where e-Node B transmits to relay and Macro User Equipments (M-UEs)...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Optimal Design of Extended Slot Allocation for Multiuser Relay Networks
Aug 2012
The authors consider a wireless sensor network where a relay helps multiple source-destination pairs. The relay helps communication pairs in a probabilistic manner during several relaying slots....
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Distributed Random Projection Code Scheme for Decode and Forward Relay Channel
Aug 2012
Random Projection Code (RPC) is a promising technique to implement the rate adaption in modern wireless communication system. This paper introduces RPC to decode-and-forward relay channel system,...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Adaptive Modulation and Coding for Two-Way Amplify-and-Forward Relay Networks
Aug 2012
In this paper, the authors introduce an adaptive modulation and coding protocol for all-participate amplify-and-forward relay network systems to achieve a better overall system performance. In the...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Joint Decode-Compress-Forward for the Broadcast Diamond Channel
Aug 2012
In this paper, the authors study the broadcast diamond channel, which is a special case of diamond channel by replacing the multiple access part in the diamond channel by two orthogonal links with...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Analyzing the Effect of Timer Timeout and Packet Length on the Performance of Error Control Protocols
Aug 2012
In the present day computer networks quality of service is a major issue, which invariably depends on the network performance under various network constraints such as flow control, error control,...
Provided by International Journal of Emerging Trends & Technology in Computer Science (IJETTCS)
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Whitepapers
Network Coding Schemes for the Multiple-Access Relay Channel
May 2011
The authors examine and compare four different Joint-Network-Channel-Codes (JNCC) and three reference systems for the Multiple-Access Relay Channel (MARC) with block Rayleigh fading channels for...
Provided by ICST
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Whitepapers
Strategies for Source/Sink Pairs in Amplify-and-Forward Gaussian Relay Networks
Oct 2010
This paper presents a framework for studying amplify-and-forward Gaussian relay networks and optimizing the strategy of source/sink pairs. A typical communication scenario is that many pairs of...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Worst-Case Linear Transmit Strategies With Limited Relay Information in Gaussian Relay Networks
Jun 2011
In practical large scale relay networks, it is often an unfeasible task to adapt the strategy of the relays to each source/sink pair communicating through the network. In this paper, the authors...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Average Approach to Amplify-and-Forward Relay Networks
Sep 2009
In this paper, the analysis of an average received Signal-to-Noise Ratio (SNR) for a cooperative communication network with Amplify-and-Forward (AF) relays is presented. In AF systems, the overall...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Distributed LDPC Coders in Cooperative Relay Networks
Sep 2009
In this paper, a new distributed LDPC coder is developed in the cooperative relay networks. Although the proposed scheme requires to use the same bandwidth as the conventional approach over OFDM...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Error Exponents for Multi-Source Multi-Relay Parallel Relay Networks With Limited Backhaul Capacity
Apr 2011
In this paper, the authors assess the random coding Error Exponents (EEs) corresponding to Decode-and-Forward (DF), Compress-and-Forward (CF) and Quantize-and-Forward (QF) relaying strategies for...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Asymptotic Analysis for Nakagami-m Fading Channels With Relay Selection
Apr 2011
In this paper, the authors analyze the asymptotic outage probability performance of both Decode-and-Forward (DF) and Amplify-and-Forward (AF) relaying systems using partial relay selection and the...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Optimal Layered Multicast With Source Rate Adaption in Two-Level Hierarchical Overlay Networks
Apr 2011
Layered overlay multicast has emerged as an important solution for video streaming over heterogeneous network. In this paper, the authors formulate it into a joint network flow control and...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Traffic Engineering Using Overlay Network
Apr 2011
Due to integrated high-speed networks accommodating various types of services and applications, the Quality of Service (QoS) requirements for those networks have also become diverse. The network...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Lattice Coding Over the Relay Channel
Apr 2011
It has been conjectured that lattice codes are good for (almost) everything. As an additional bit of evidence for this claim, the authors offer a few results showing the utility of lattice codes...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
A Simple Probabilistic Relay Selection Protocol for Asynchronous Multi-Relay Networks Employing Rateless Codes
Apr 2011
Cooperative communication with rateless codes has attracted much attention recently because it can provide both spatial diversity and high bandwidth efficiency. However, relay selection for...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Relay Selection With Outdated Channel Estimates in Nakagami-m Fading
Apr 2011
The authors study the effect of outdated channel estimates on decode-and-forward relay selection, when operating over Nakagami-m fading channels. Closed-form expressions for the exact outage...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
A Near Optimal Amplify and Forward Relaying in Two-Way Relay Networks
Apr 2011
In this paper, the authors consider a Two-Way Relay Network (TWRN) employing Amplify and Forward (AF) relaying protocol and design a near optimal AF scheme to minimize the sum Bit Error Rate (BER)...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
A Pilot Design Technique for Single-Carrier Transmission Over Fast Fading Relay Channels
Oct 2008
Relay-assisted Space-Time Block Code (STBC) and Space-Frequency Block Code (SFBC) for Single Carrier Frequency-Domain Equalization (SC-FDE) were presented. They achieve spatial diversity over...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Cooperative Multiplexing in Full-Duplex Multi-Antenna Relay Networks
Oct 2008
Consider a network with one source, one destination and multiple relays. It is shown that multiplexing gains that are higher than that of the direct link are possible for any finite SNR, in such a...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Optimal Training Sequence Design for Bi-Directional Relay Networks
Oct 2008
In this paper, the problem of training sequence design in a bi-directional relay network is investigated. The two nodes Tx1 and Tx2 communicate with each other via a ReLay (RL). The RL receives...
Provided by Institute of Electrical & Electronic Engineers
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Webcasts
netmap: A Novel Framework for Fast Packet I/O
Jan 2012
Many applications (routers, traffic monitors, firewalls, etc.) need to send and receive packets at line rate even on very fast links. In this webcast, the presenter presents netmap, a novel...
Provided by USENIX
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Whitepapers
Parallel Relay Networks With Phase Fading
Oct 2008
In this paper, the authors consider Gaussian parallel relay networks with phase fading where a source node wants to communicate with a destination node with the assistance of two intermediate...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Characterization of Relay Channels Using the Bhattacharyya Parameter
Oct 2008
Relay systems have large and complex parameter spaces, which makes it difficult to determine the parameter region where the system achieves a given performance criterion, such as probability of...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Space-Time Communication Protocols for N-Way Relay Networks
Oct 2008
The authors address communication protocols for N-way relay networks with M antennas at the relay and a single antenna at the N source terminals. In particular, Amplify-and-Forward (AF),...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Diversity-Multiplexing Tradeoffs in MIMO Relay Channels
Oct 2008
A multi-hop relay channel with multiple antenna terminals in a quasi-static slow fading environment is considered. For both full-duplex and half-duplex relays the fundamental...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
On the Performance Analysis of Multi-Relay Cooperative Diversity Systems With Channel Estimation Errors
Jun 2011
In this paper, the authors investigate the performance of an Amplify-and-Forward (AF) cooperative diversity system with multiple relays in the presence of channel estimation errors. They consider...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
On the Throughput-Delay Tradeoff in the Diamond Relay Networks
Jun 2008
Diamond relay channel has recently been attracting considerable attention in wireless Ad Hoc networks. In some previous discussions, a cooperative mode named SRP (Spatial Reused Pattern) has been...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Optimized Power Allocation for Multiple-Antenna Multiple-Relay Cooperative Communication System
Jul 2008
One of the main advantages of relayed communication is that it reduces the necessary transmit power and distributes transmitted power throughout the hops. This implies lower interference to the...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
A Robust Relay Selection Strategy for Cooperative Systems With Outdated CSI
Mar 2009
In this paper, the authors consider a cooperative system based on relay selection in a scenario where the available Channel State Information (CSI) is subject to delays. In order to exploit the...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
A Pre-BSC Model for Distributed Turbo Codes
Mar 2009
A model that effectively captures the relay decoding error is proposed for a Distributed Turbo Code (DTC) over a cooperative relay channel. The model consists of a memoryless Binary Symmetric...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
A Novel Quantization Scheme in Compress-and-Forward Relay System
Mar 2009
In this paper, the authors extend a well-developed quantization scheme to block fading relay system using compress-and-forward and propose a new Achievable Rate Based Quantization Scheme (ARBQS)....
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Efficient ARQ Protocol for Hybrid Relay Schemes With Limited Feedback
Mar 2009
When Channel State Information (CSI) is not available to the transmitter, outage events might happen and Automatic Repeat re-Quest (ARQ) is implemented to ensure reliable transmission in such...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Cooperative Communication Using Bit-Selective Adaptive Demodulation and Raptor Codes: The Gaussian Relay Channel Case
Mar 2009
In this paper, the authors propose a cooperative communication system where every link adapts to the channel condition without any feedback, by using a recently proposed Adaptive De-Modulation...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Minimum MSE Relaying for Arbitrary Signal Constellations in Coded Relay Networks
Mar 2009
In this paper a soft relaying scheme for coded relay networks combining the benefits of classical Decode-Forward (DF) and Amplify-Forward (AF) is extended to higher order modulation schemes. In...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Average SNR and Ergodic Capacity Analysis for Proactive and Reactive DF Relaying Over Rayleigh Fading Channels
Mar 2009
In this paper, the authors focus on single-selection opportunistic relaying with the decode-and-forward protocol over Rayleigh fading channels. The end-to-end average Signal-to-Noise Ratios (SNR)...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Outage Probability of Dual-Hop Relay Channels in the Presence of Interference
Mar 2009
In this paper, the authors address the performance of a dual-hop relay fading channel in an interference-limited environment, in which the destination node is corrupted by co-channel interference...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Multiuser Cooperative Relay Communication Employing Hierarchical Modulation
Mar 2010
The authors develop a scheme to improve data throughput for multiuser cooperative relay communications operating in half-duplex mode. Cooperative relay, while effective in mitigating fading...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Superposition Coding Aided Bi-Directional Relay Transmission Employing Iteratively Decoded Self-Concatenated Convolutional Codes
Mar 2010
In this paper, the authors consider coding schemes designed for two nodes communicating with each other with the aid of a relay node, which receives information from the two nodes in the first...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Power Bargaining in Multi-Source Relay Networks
May 2012
In this paper, the authors consider a multi-source single-relay wireless network, where the relay facilitates transmissions of the sources' signals to the destination. They study the relay power...
Provided by University of Alaska, Fairbanks
-
Whitepapers
Sparse Channel Estimation for OFDM Transmission Over Two-Way Relay Networks
May 2012
Compressed Sensing (CS) has recently emerged as a powerful signal acquisition paradigm. CS enables the recovery of high-dimensional sparse signals from much fewer samples than usually required....
Provided by Chinese Academy of Sciences
-
Whitepapers
Tightened Upper Bounds for Distributed Alamouti Code With a Non-Regenerative Relay
May 2012
In this paper, the authors consider a cooperative system with distributed Alamouti's code that includes a source, a non-regenerative relay and a destination. The relay uses the amplify-and-forward...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Exact Analytical Solution for AF Relaying Systems With Full Selection Diversity
May 2012
New, exact closed-form expressions are derived for the Probability Density Function (PDF) and the Cumulative Distribution Function (CDF) of the instantaneous end-to-end Signal-to-Noise Ratio (SNR)...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Performance Evaluation of Multi-Hop Multi-Branch Relaying Networks With Multiple Co-Channel Interferers
May 2012
In this paper, the performance of opportunistic amplify-and-forward multi-hop multi-branch relaying systems operating in the presence of co-channel interferences is investigated. Considering...
Provided by University of Pune
-
Whitepapers
Dual-hop Amplify-and-Forward Transmission With Imperfect Channel Estimates at the Relay
May 2012
With reference to the typical three-node Amplify-and-Forward (AF) relaying setup, where a single relay assists the communication between a source terminal and a destination terminal, the authors...
Provided by University of Bristol
-
Whitepapers
Zero-Forcing Based MIMO Two-Way Relay With Relay Antenna Selection: Transmission Scheme and Diversity Analysis
May 2012
The combination of Physical-layer Network Coding (PNC) and Multiple-Input Multiple-Output (MIMO) is expected to improve the throughput of two-way relay network. In this paper, the authors propose...
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
Selective Relaying in Multi-Relay Networks With Feedback Delays and Adaptive Modulation
May 2012
This paper evaluates the performance of adaptive modulation in multi-relay networks with selective relaying, under Nakagami-m fading. In the system model, the source decides independently whether...
Provided by University of South Florida
-
Whitepapers
Energy-Aware Relay Selection for Multiuser Relay Networks
May 2012
The authors consider a dual-hop relay network with multiple Source-Destination (S-D) pairs and multiple relays, where amplify-and-forward relaying strategy is applied and transmission among S-D...
Provided by University of Oldenburg
-
Whitepapers
Capacity Maximization in Cooperative CRNs: Joint Relay Assignment and Channel Allocation
May 2012
Cooperative Communication (CC) can offer high channel capacity and reliability in an efficient and low-cost way by forming a virtual antenna array among single-antenna nodes that cooperatively...
Provided by University of Washington School of Public Health & Community Medicine
-
Whitepapers
Energy-Delay Tradeoffs in a Linear Sequence of Relay Channels
Mar 2012
In this paper, the authors aim at characterizing the gain induced by using relay channels in a linear network under both capacity constraint and realistic energy model. They express a general...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Analysis of Energy Efficiency for Packet-Based Transmission
Mar 2012
In this paper, the authors propose a new definition of energy efficiency with respect to a given target Packet Error Rate (PER). It is shown that some previous reported definitions are actually...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Performance Analysis and Power Allocation of AF Best Relay Selection in Generic Noise
Mar 2012
In this paper, the authors provide a high Signal-to-Noise Ratio (SNR) error rate analysis of Amplify-and-Forward (AF) best relay selection in networks impaired by Rayleigh fading and generic,...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Battery-Aware Energy Efficiency of Incremental Decode-and-Forward With Relay Selection
Mar 2012
The authors analyze the energy efficiency of reactive and proactive relay selection algorithms under the incremental decode-and-forward protocol. By taking into account the consumption of the RF...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Decode-and-Forward Based Strategies for Secrecy in Multiple-Relay Networks
Mar 2012
In this paper, the authors first study the Decode-and-Forward strategy for secrecy in a single-relay network. They propose a suboptimal Decode-and-Forward with Zero Forcing (DF/ZF) strategy for...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
CQI Reporting Strategies for Nonregenerative Two-Way Relay Networks
Mar 2012
This paper considers data exchange between two terminals in a non-regenerative two-way relay network. The authors first propose two efficient Channel Quality Indicator (CQI) reporting schemes...
Provided by Institute of Electrical & Electronic Engineers
-
Whitepapers
Optimized Discrete-Estimate-and-Forward Relaying Strategy
Mar 2012
The authors study the conventional three node cooperative relaying problem. A Discrete-Estimate-and-Forward (DEF) strategy is presented, where a discrete alphabet is utilized for the relay's...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
On the Performance of Dual-Hop Space Shift Keying With Single Amplify-and-Forward Relay
Mar 2012
In this paper, single Amplify and Forward (AF) relay is placed between the source and the destination in Space Shift Keying (SSK) Multiple-Input Single Output (MISO) system. In SSK,...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Exact Error Analysis for the Piecewise Linear Combiner for Decode and Forward Cooperation with Two Relays
Dec 2010
Exact expressions are obtained for the Bit Error Rate (BER) for coherent and non-coherent Decode and Forward (DF) cooperative systems with two relays. The Piecewise Linear (PL) combiner, a close...
Provided by Indian Institute of Technology Bombay
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Whitepapers
Performance Analysis of a Multi-Relay Cooperative Diversity Network With Decode and Forward Relaying
Dec 2009
Consider a multi-relay cooperative diversity network consisting of a source, N relays, and a destination. For the transmission of a data symbol from the source to the destination, the relays...
Provided by Indian Institute of Technology Delhi
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Whitepapers
Coded Bidirectional Relaying in Wireless Networks
Sep 2008
The communication strategies for coded bidirectional (two-way) relaying emerge as a result of successful amalgamation of the recent ideas from network coding and the broadcast/interfering nature...
Provided by Aalborg University
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Whitepapers
A Novel Coding Scheme Based on GLD Codes for Cooperative Relay Networks
Aug 2008
A novel coding scheme called the distributed Generalized Low-Density (GLD) code is proposed for cooperative relay networks. In this paper, each relay node decodes and forwards some of the...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Transmission Strategies for Parallel Relay Networks Based on Superposition Coding
Aug 2008
This paper is concerned with the transmission strategies and relay selection for decode-and-forward Parallel Relay Networks (PRNs) based on superposition coding. The authors' focus is on the...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Low Complexity Acquisition of UWB Telemetry Data Packets With Clock Offset
Aug 2008
In this paper, low complexity acquisition of UWB telemetry data packets is addressed. In addition to the usual channel impairments considered of Additive White Gaussian Noise (AWGN) noise and...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
On the Diversity Order of AF Cooperative Systems With Inter-Relay Interference Cancellation
Apr 2008
In this paper, the authors analyze a full rate cooperative communication system using Amplify-and-Forward (AF) two-path relaying scheme with inter-relay interference cancellation at the relay. By...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Soft Decode and Forward of MQAM Modulations for Cooperative Relay Channels
Apr 2008
A novel approach for extension of soft decode and forward strategy into higher order MQAM modulation is proposed. A new soft mapping function is introduced to map soft bits onto a point in the...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Doubly Differential Communication Assisted With Cooperative Relay
Apr 2008
Doubly differential modem turns out to be a promising technology for coping with unknown frequency offsets with the pay of Signal-to-Noise Ratio (SNR). In this paper, the authors propose to...
Provided by Institute of Electrical & Electronic Engineers
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Whitepapers
Rake: Semantics Assisted Network-Based Tracing Framework
Sep 2012
The ability to trace request execution paths is critical for diagnosing performance faults in large-scale distributed systems. Previous black-box and white-box approaches are either inaccurate or...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
A Practical Fair Queuing Scheduler: Simplification Through Quantization
Apr 2011
The design of fair packet schedulers involves a tradeoff between implementation complexity, on one hand, and delay and fairness guarantees, on the other. In this paper, the authors present...
Provided by Reed Elsevier
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White Papers
Worst-Case Fair Bin Sort Queuing (WBSQ): An O(1) Worst-Case Fair Scheduler
Jul 2011
The Internet has evolved into a ubiquitous global communication medium that carries a constantly evolving traffic mix that is becoming richer as innovation and technology improvements spawn new...
Provided by Institute of Electrical and Electronics Engineers
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Case Studies
Expand Networks Accelerates Traffic Over the Wan
Apr 2008
Leader in the lift-truck manufacturing industry, Fenwick counts 2000 employees in France, divided between the headquarters, a factory and several branch offices all around the French territory....
Provided by Expand Networks
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White Papers
Simulation of Fading Channel and Burst Error Behavior of State-3 Memoryless Markov Model
Nov 2011
The paper contain a report on simulation of fading channel using Markov Model through a very simple and effective approach, The paper established the successful application of Discrete time...
Provided by Universiti Malaysia Perlis
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White Papers
Capacity (Cut-Set) Bounds for Multi-Hop Relay Networks in Erasure Channels
Jan 2012
This paper deals with the finding of capacity bounds for multi-hop relay networks in erasure channels. As importance of complex networks of nodes and relays and significance of erasure channels...
Provided by K L University
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White Papers
Secrecy in Cooperative Relay Broadcast Channels
Jan 2011
The authors investigate the effects of user cooperation on the secrecy of broadcast channels by considering a cooperative relay broadcast channel. They show that user cooperation can increase the...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Secure Communication in Multiple Relay Networks Through Decode-and-Forward Strategies
Jan 2012
In this paper, the authors first study the Decode-and-Forward strategy for secrecy in a single-relay network. They propose a suboptimal Decode-and-Forward with Zero Forcing (DF/ZF) strategy for...
Provided by University of Maryland
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White Papers
Capacity of a Class of Diamond Channels
Aug 2011
The authors study a special class of diamond channels which was introduced by Schein in 2001. In this special class, each diamond channel consists of a transmitter, a noisy relay, a noiseless...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Dynamics of Feedback-Induced Packet Delay in Power-Law Networks
May 2010
Dynamic interactions of various network-related protocols induced by the functional partition make the Internet to be complicated systems; details are hardly captured because of large-scale and...
Provided by Osaka University
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White Papers
On the Packet Delay Distribution in Power-Law Networks
May 2009
Measurement studies of the Internet topology have revealed that the degree distribution exhibits a power-law attribute. In this paper, the authors investigate packet-level delay behavior of...
Provided by Osaka University
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