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Beijing University of Posts and Telecommunications
(84 results)-
White Papers
An Analysis of Various Models for Wireless Cities
January 31, 2008, 12:00am PST
As "Wireless Cities" are booming in the world, a wide variety of business models are deployed. From a government's perspective, this paper compares the advantages and disadvantages of different...
Provided by Beijing University of Posts and Telecommunications
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White Papers
Efficient Access Control of Sensitive Data Service in Outsourcing Scenarios
February 15, 2010, 12:00am PST
With the rapid application of service-oriented technologies, service and data outsourcing has become a practical and useful computing paradigm. Combined use of access control and cryptography was...
Provided by Beijing University of Posts and Telecommunications
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White Papers
A Selection Region Based Routing Protocol for Random Mobile Ad Hoc Networks With Directional
November 28, 2010, 12:00am PST
In this paper, the authors propose a selection region based multihop routing protocol with directional antennas for wireless mobile ad hoc networks, where the selection region is defined by two...
Provided by Beijing University of Posts and Telecommunications
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White Papers
Joint Uplink and Downlink Relay Selection in Cooperative Cellular Networks
September 1, 2010, 12:00am PDT
The authors consider relay selection technique in a cooperative cellular network where user terminals act as mobile relays to help the communications between Base Station (BS) and mobile station...
Provided by Beijing University of Posts and Telecommunications
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White Papers
Energy-Efficient Relay Selection and Optimal Relay Location in Cooperative Cellular Networks With Asymmetric Traffic
April 30, 2010, 12:00am PDT
Energy-efficient communication is an important requirement for mobile relay networks due to the limited battery power of user terminals. This paper considers energy-efficient relaying schemes...
Provided by Beijing University of Posts and Telecommunications
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White Papers
Joint Transmitter-Receiver Design for the Downlink Multiuser Spatial Multiplexing MIMO System
November 4, 2008, 12:00am PST
In the multiuser spatial multiplexing Multiple-Input Multiple-Output (MIMO) system, the joint Transmitter-Receiver (Tx-Rx) design is investigated to minimize the weighted sum power under the...
Provided by Beijing University of Posts and Telecommunications
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White Papers
Efficient and Provably-Secure Certificateless Short Signature Scheme From Bilinear Pairings
June 25, 2007, 12:00am PDT
In this paper, the authors present a CertificateLess Signature (CLS) scheme that is proved to be secure in the random oracle model under the hardness assumptions of k-CAA and Inv-CDHP. The scheme...
Provided by Beijing University of Posts and Telecommunications
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White Papers
Enhanced MILSA Architecture for Naming, Addressing, Routing and Security Issues in the Next Generation Internet
January 10, 2010, 12:00am PST
MILSA (Mobility and Multihoming supporting Identifier Locator Split Architecture) has been proposed to address the naming and addressing challenges for NGI (Next Generation Internet). The authors...
Provided by Beijing University of Posts and Telecommunications
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White Papers
Design and Analysis of a Hash Ring-Iterative Structure
August 20, 2010, 12:00am PDT
The authors propose a new type of hash iterative structure - the ring-iterative structure with feedback which is subdivided into the Single Feedback Ring Iteration and the Multiple Feedback Ring...
Provided by Beijing University of Posts and Telecommunications
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White Papers
High Level Architecture Evolved Modular Federation Object Model
July 7, 2008, 12:00am PDT
To improve the agility, dynamics, composability, reusability, and development efficiency restricted by monolithic Federation Object Model (FOM), a modular FOM was proposed by High Level...
Provided by Beijing University of Posts and Telecommunications
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White Papers
A General Stochastic Spatial MIMO Channel Model for Evaluating Various MIMO Techniques
June 9, 2009, 12:00am PDT
A general stochastic spatial MIMO channel model is proposed for evaluating various MIMO techniques in this paper. It can generate MIMO channels complying with various MIMO configurations such as...
Provided by Beijing University of Posts and Telecommunications
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White Papers
A Priority and SDB Based Admission Control in IEEE 802.16 Systems
September 1, 2010, 12:00am PDT
In IEEE 802.16 systems, the algorithm of Admission Control (AC) is very important in guaranteeing the Quality of Service (QoS) and managing service flows. However, the IEEE 802.16 standards do not...
Provided by Beijing University of Posts and Telecommunications
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White Papers
A New Secure Strategy in Small-Scale IEEE 802.11 Wireless Local Area Networks With Web Authentication and Virtual Local Area Network
March 1, 2011, 12:00am PST
As the main secret-key encryption techniques of the Wireless Local Area Network (WLAN) have been proven to be unsafe, wireless network security is faced with serious challenges. It is unpractical...
Provided by Beijing University of Posts and Telecommunications
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White Papers
Self-Aware Services of NGSDP:Using Bayesian Networks for Measuring Quality of Convergent Services
June 1, 2011, 12:00am PDT
The authors propose a general architecture and implementation for the autonomous assessment of quality of arbitrary service elements in the convergent service environments. They describe a quality...
Provided by Beijing University of Posts and Telecommunications
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Whitepapers
Location Optimization for Decode-and-Forward Opportunistic Cooperative Networks
April 19, 2010, 12:00am PDT
In this paper, the authors investigate the location optimization for Decode-and-Forward (DF) opportunistic cooperative networks, in which the impact of the availability of the direct link between...
Provided by Beijing University of Posts and Telecommunications
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Whitepapers
Limited Feedback Scheme Based on Zero-Forcing Precoding for Multiuser MIMO-OFDM Downlink Systems
April 19, 2010, 12:00am PDT
Conventional zero-forcing precoding was well investigated, but it hadn't considered the Channel Quality Indicator (CQI) mismatch for practical system with limited feedback. This paper studies a...
Provided by Beijing University of Posts and Telecommunications
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Whitepapers
Zero-Forcing Based MIMO Two-Way Relay With Relay Antenna Selection: Transmission Scheme and Diversity Analysis
May 24, 2012, 12:00am PDT
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
Optimal Power Allocation and Relay Selection in Dual-Hop and Multi-Hop Cognitive Networks
May 24, 2012, 12:00am PDT
In this paper, the authors consider a cognitive relay network which contains a source node, a destination node and a group of network clusters each consisting of several cognitive relay nodes....
Provided by Beijing University of Posts and Telecommunications
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Whitepapers
Spectrum Sharing and Resource Allocation for Energy-Efficient Heterogeneous Cognitive Radio Networks With Femtocells
May 24, 2012, 12:00am PDT
In heterogeneous wireless networks with femtocells, the issue of interference between femtocells and macrocells should be carefully considered. Using cognitive radio for interference management is...
Provided by Beijing University of Posts and Telecommunications
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Whitepapers
An Indirect Reciprocity Game Theoretic Framework for Dynamic Spectrum Access
May 24, 2012, 12:00am PDT
In this paper, the authors propose a spectrum access framework to address the efficient allocation of channels of a Base Station (BS) by stimulating cooperation between Primary Users (PUs) and...
Provided by Beijing University of Posts and Telecommunications
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Whitepapers
Interference-Aware Resource Allocation in Co-Channel Deployment of OFDMA Femtocells
May 24, 2012, 12:00am PDT
Macrocells may suffer serious uplink interference introduced by the deployment of co-channel femtocells. In this paper, an interference-aware pricing-based resource allocation algorithm for...
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
Joint Time-Varying Channel Estimation With Dual-ICI Cancellation in OFDM Systems
May 24, 2012, 12:00am PDT
Channel estimation plays a vital role in coherent detection and demodulation in Orthogonal Frequency Division Multiplexing (OFDM) systems. However, the channel time-variation leads to tremendous...
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
Hybrid Virtual Network Embedding With K-Core Decomposition and Time-Oriented Priority
May 24, 2012, 12:00am PDT
Network virtualization provides a powerful tool to allow multiple networks, each customized to a specific purpose, to run on a shared substrate. However, a big challenge is how to map multiple...
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
Radio Admission Control Scheme for High-Speed Railway Communication With MIMO Antennas
May 24, 2012, 12:00am PDT
Along with the wide deployment of high-speed railway at more than 300 km/h, providing various services effectively for users in the train becomes both practical demand and interesting challenge...
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
TCP Performance Improvement in Wireless Networks With Cooperative Communications and Network Coding
May 24, 2012, 12:00am PDT
Cooperative communications and network coding are considered as effective technologies to provide robust and efficient communications. Most existing studies focus on lower layer performance, such...
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
A Novel Time Domain Approach for the Downlink Pilot Design of Multiantenna OFDM Systems
May 24, 2012, 12:00am PDT
A novel time domain approach is introduced for the downlink pilot design of multi-antenna OFDM systems. Zero correlation zone sequence sets are used to construct the pilot sequences so that the...
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
A Novel Frame Structure for Centralized Cooperative Cognitive Networks to Achieve Overhead-Throughput Tradeoff
May 24, 2012, 12:00am PDT
With the rapid development of wireless communication networks, more and more spectrum resources are required and the scarcity in spectrum has become a serious concern. Cognitive Radio (CR)...
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
On the Performance of Opportunistic Amplify-and-Forward Relaying in Two-Wave With Diffuse Power Fading Channels
March 12, 2012, 12:00am PDT
This paper considers cooperative networks in independent and non-identical Two-Wave with Diffuse Power (TWDP) fading channels using opportunistic Amplify-and-Forward (AF) relaying. The authors...
Provided by Beijing University of Posts and Telecommunications
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Whitepapers
System-Level Analysis and Evaluation of SF-DC Transmit Mode in HSPA+ System
March 12, 2012, 12:00am PDT
Cooperated multi-point technique in HSPA+ system has not been paid attention until the Single Frequency Dual Cell (SF-DC) mode, where one User Equipment (UE) may be served by dual Node-Bs...
Provided by Beijing University of Posts and Telecommunications
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Whitepapers
Mobile Sensor Scheduling for Timely Sweep Coverage
March 12, 2012, 12:00am PDT
Mobile sensors are a viable choice for providing monitoring service on a set of Points of Interest (PoIs) in a large sensing field. In some applications, each PoI should be covered periodically...
Provided by Beijing University of Posts and Telecommunications
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Whitepapers
Through-Wall Tracking With Radio Tomography Networks Using Foreground Detection
March 12, 2012, 12:00am PDT
This paper presents a novel method for tracking a moving person or object through walls using wireless networks. The method takes advantage of the motion-induced variation of Received Signal...
Provided by Beijing University of Posts and Telecommunications
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Whitepapers
Novel Recursive Approach for OFDM Channel Estimation Under Highly Mobile Conditions
March 12, 2012, 12:00am PDT
This paper proposes a novel recursive approach for Orthogonal Frequency Division Multiplexing (OFDM) channel estimation over highly mobile channels without any priori channel statistics. The key...
Provided by Beijing University of Posts and Telecommunications
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Whitepapers
A Separate-SMDP Approximation Technique for RRM in Heterogeneous Wireless Networks
March 12, 2012, 12:00am PDT
This paper proposes the separate-SMDP approximation technique to solve the dimensionality problem of the Semi-Markov Decision Process (SMDP) model for Radio Resource Management (RRM). The proposed...
Provided by Beijing University of Posts and Telecommunications
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Whitepapers
A Physarum-Inspired Algorithm for Minimal Exposure Problem in Wireless Sensor Networks
March 12, 2012, 12:00am PDT
Exposure problem, which corresponds to the quality of coverage, is a fundamental problem in wireless sensor networks. In this paper, the authors exploit a cellular computing model in the physarum...
Provided by Beijing University of Posts and Telecommunications
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Whitepapers
Collaborative Spectrum Sensing in Multi-Channel Cognitive Networks: A Coalition Game Approach
March 12, 2012, 12:00am PDT
Collaborative spectrum sensing among Secondary Users (SUs) in Cognitive Radio (CR) networks is shown to yield a significant performance improvement. However, much previous work in CR networks...
Provided by Beijing University of Posts and Telecommunications
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Whitepapers
Distributed Cooperative Spectrum Sensing for Cognitive Radio Networks
March 12, 2012, 12:00am PDT
Spectrum sensing is an essential functionality of cognitive radio networks. In this paper, a non-cooperative game framework is proposed for studying the interactions between multiple secondary...
Provided by Beijing University of Posts and Telecommunications
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Whitepapers
A Distributed Algorithm Combining Power Control and Scheduling for Femtocell Networks
March 12, 2012, 12:00am PDT
In this paper, the authors present a distributed algorithm combining power control and scheduling for densely deployed femtocells networks. The strong interference in the downlink from the...
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
Analysis and Improvement of a Strongly Secure Certificateless Key Exchange Protocol Without Pairing
December 6, 2011, 12:00am PST
Recently, Yang and Tan proposed a certificate less key exchange protocol without pairing, and claimed their scheme satisfies forward secrecy, which means no adversary could derive an...
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
A Novel Multi-Objective Relay-Jammer Pair Selection Scheme in Wireless Cooperative Networks
November 21, 2012, 12:00am PST
To further enhance the Quality of Service (QoS), this paper proposes a novel multi-objective relay-jammer pair selection scheme in wireless cooperative networks where the wireless channels are...
Provided by Beijing University of Posts and Telecommunications
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Whitepapers
Random Circulant Orthogonal Matrix Based Analog Compressed Sensing
November 21, 2012, 12:00am PST
Analog Compressed Sensing (CS) has attracted considerable research interest in sampling area. One of the promising analog CS technique is the recently proposed Modulated Wideband Converter (MWC)....
Provided by Beijing University of Posts and Telecommunications
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Whitepapers
A New Architecture of HSS Based on Cloud Computing
September 15, 2011, 12:00am PDT
IP Multimedia Subsystem (IMS) is the key technology of the Next Generation Network (NGN) and the optimal solution of mobile and fixed network convergence which is approved by the public. Home...
Provided by Beijing University of Posts and Telecommunications
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Whitepapers
A Cell Based Dynamic Spectrum Management Scheme with Interference Mitigation for Cognitive Networks
April 15, 2008, 12:00am PDT
The scarcity of spectrum resource in future wireless networks has inspired the demand of Dynamic Spectrum Management (DSM). This paper investigates a Cell Based Dynamic Spectrum Management (CBDSM)...
Provided by Beijing University of Posts and Telecommunications
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Whitepapers
System Analysis of Imperfect Adaptive Beam Forming Antenna for TDD HSDPA
April 15, 2008, 12:00am PDT
Adaptive beam forming antenna, which is adopted in TDD HSDPA system, has been proved to be an effective way to improve the system performance. In the realistic system, however, the high...
Provided by Beijing University of Posts and Telecommunications
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Whitepapers
Reliable Transmission of H.264 Video over Wireless Network
April 15, 2008, 12:00am PDT
In this paper, the authors present a new error robust method for H.264 video transmission. This scheme uses Unequal Error Protection (UEP) and Automatic Repeat Request (ARQ) protocol to provide...
Provided by Beijing University of Posts and Telecommunications
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Whitepapers
Multi-User MIMO Systems Using Semi-Orthogonal Space Division Multiplexing with Alamouti Code
April 15, 2008, 12:00am PDT
In this paper, a multi-user Multiple Input Multiple Output (MIMO) system using semi-Orthogonal Space Division Multiplexing (semi-OSDM) and single-user QR-triangular detection with Alamouti code is...
Provided by Beijing University of Posts and Telecommunications
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Whitepapers
Performance Analysis of Channel-aware Multichannel CSMA in Wireless Networks
April 15, 2008, 12:00am PDT
Need arises to increase the network throughput by broadening the bandwidth. One effectively approaches are multichannel technique in which multiple separate frequency channels are used for...
Provided by Beijing University of Posts and Telecommunications
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Whitepapers
Research on Neighboring APs Discovery Methods in PnP WLAN
March 11, 2008, 12:00am PDT
To overcome the disadvantage in traditional manual configuration method for WLANs, such as the high configuration and maintenance cost and low efficiency of system performance, the authors propose...
Provided by Beijing University of Posts and Telecommunications
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Whitepapers
A Truthful and Low-Overhead Routing Protocol for Ad Hoc Networks
April 1, 2013, 12:00am PDT
Nodes in wireless ad hoc networks depend on others for forwarding packets hop by hop. However, nodes may behave selfishly and do not forward packets for saving their limited resources. Approaches...
Provided by Beijing University of Posts and Telecommunications
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Whitepapers
A Novel Observe-and-Forward Scheme in Wireless Cooperative Relaying Systems
October 27, 2009, 12:00am PDT
In this paper, a novel Observe-and-Forward (OF) cooperative scheme is proposed for relay-enhanced wireless cooperative systems. In this scheme, the codewords transmitted from the source are...
Provided by Beijing University of Posts and Telecommunications
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Whitepapers
An Efficient Parallel Algorithm with Partial Decision Feedback for Near-Optimal MIMO Detection
October 27, 2009, 12:00am PDT
Maximum-Likelihood Detection (MLD) is the optimal scheme for Multiple-Input Multiple-Output (MIMO) channels. However, due to its exponentially high complexity, many alternative algorithms,...
Provided by Beijing University of Posts and Telecommunications
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Whitepapers
Mobile Wireless Sensor Networks: Architects for Pervasive Computing
February 18, 2011, 12:00am PST
A mobile wireless sensor network owes its name to the presence of mobile sink or sensor nodes within the network. The advantages of mobile wireless sensor network over static wireless sensor...
Provided by Beijing University of Posts and Telecommunications
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Whitepapers
Topology-Aware Virtual Network Embedding Through Bayesian Network Analysis
November 21, 2012, 12:00am PST
Multiple heterogeneous virtual networks are given the ability to run on a shared infrastructure simultaneously as independent slices in the network virtualization environment. However, a major...
Provided by Beijing University of Posts and Telecommunications
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Whitepapers
Minimizing Electricity Cost in Geographical Virtual Network Embedding
November 21, 2012, 12:00am PST
In light of rapid increase of electricity cost, many business organizations have to find new ways to cut the electricity bill. This paper studies how to reduce the electricity cost in geographical...
Provided by Beijing University of Posts and Telecommunications
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Whitepapers
Random Circulant Orthogonal Matrix Based Analog Compressed Sensing
November 21, 2012, 12:00am PST
Analog Compressed Sensing (CS) has attracted considerable research interest in sampling area. One of the promising analog CS technique is the recently proposed Modulated Wideband Converter (MWC)....
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
A Novel Multi-Objective Relay-Jammer Pair Selection Scheme in Wireless Cooperative Networks
November 21, 2012, 12:00am PST
To further enhance the Quality of Service (QoS), this paper proposes a novel multi-objective relay-jammer pair selection scheme in wireless cooperative networks where the wireless channels are...
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
Analysis and Improvement of a Strongly Secure Certificateless Key Exchange Protocol Without Pairing
December 6, 2011, 12:00am PST
Recently, Yang and Tan proposed a certificate less key exchange protocol without pairing, and claimed their scheme satisfies forward secrecy, which means no adversary could derive an...
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
A Distributed Algorithm Combining Power Control and Scheduling for Femtocell Networks
March 12, 2012, 12:00am PDT
In this paper, the authors present a distributed algorithm combining power control and scheduling for densely deployed femtocells networks. The strong interference in the downlink from the...
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
Distributed Cooperative Spectrum Sensing for Cognitive Radio Networks
March 12, 2012, 12:00am PDT
Spectrum sensing is an essential functionality of cognitive radio networks. In this paper, a non-cooperative game framework is proposed for studying the interactions between multiple secondary...
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
Collaborative Spectrum Sensing in Multi-Channel Cognitive Networks: A Coalition Game Approach
March 12, 2012, 12:00am PDT
Collaborative spectrum sensing among Secondary Users (SUs) in Cognitive Radio (CR) networks is shown to yield a significant performance improvement. However, much previous work in CR networks...
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
A Physarum-Inspired Algorithm for Minimal Exposure Problem in Wireless Sensor Networks
March 12, 2012, 12:00am PDT
Exposure problem, which corresponds to the quality of coverage, is a fundamental problem in wireless sensor networks. In this paper, the authors exploit a cellular computing model in the physarum...
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
A Separate-SMDP Approximation Technique for RRM in Heterogeneous Wireless Networks
March 12, 2012, 12:00am PDT
This paper proposes the separate-SMDP approximation technique to solve the dimensionality problem of the Semi-Markov Decision Process (SMDP) model for Radio Resource Management (RRM). The proposed...
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
Novel Recursive Approach for OFDM Channel Estimation Under Highly Mobile Conditions
March 12, 2012, 12:00am PDT
This paper proposes a novel recursive approach for Orthogonal Frequency Division Multiplexing (OFDM) channel estimation over highly mobile channels without any priori channel statistics. The key...
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
Through-Wall Tracking With Radio Tomography Networks Using Foreground Detection
March 12, 2012, 12:00am PDT
This paper presents a novel method for tracking a moving person or object through walls using wireless networks. The method takes advantage of the motion-induced variation of Received Signal...
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
Mobile Sensor Scheduling for Timely Sweep Coverage
March 12, 2012, 12:00am PDT
Mobile sensors are a viable choice for providing monitoring service on a set of Points of Interest (PoIs) in a large sensing field. In some applications, each PoI should be covered periodically...
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
System-Level Analysis and Evaluation of SF-DC Transmit Mode in HSPA+ System
March 12, 2012, 12:00am PDT
Cooperated multi-point technique in HSPA+ system has not been paid attention until the Single Frequency Dual Cell (SF-DC) mode, where one User Equipment (UE) may be served by dual Node-Bs...
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
On the Performance of Opportunistic Amplify-and-Forward Relaying in Two-Wave With Diffuse Power Fading Channels
March 12, 2012, 12:00am PDT
This paper considers cooperative networks in independent and non-identical Two-Wave with Diffuse Power (TWDP) fading channels using opportunistic Amplify-and-Forward (AF) relaying. The authors...
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
A Novel Frame Structure for Centralized Cooperative Cognitive Networks to Achieve Overhead-Throughput Tradeoff
May 24, 2012, 12:00am PDT
With the rapid development of wireless communication networks, more and more spectrum resources are required and the scarcity in spectrum has become a serious concern. Cognitive Radio (CR)...
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
A Novel Time Domain Approach for the Downlink Pilot Design of Multiantenna OFDM Systems
May 24, 2012, 12:00am PDT
A novel time domain approach is introduced for the downlink pilot design of multi-antenna OFDM systems. Zero correlation zone sequence sets are used to construct the pilot sequences so that the...
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
TCP Performance Improvement in Wireless Networks With Cooperative Communications and Network Coding
May 24, 2012, 12:00am PDT
Cooperative communications and network coding are considered as effective technologies to provide robust and efficient communications. Most existing studies focus on lower layer performance, such...
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
Radio Admission Control Scheme for High-Speed Railway Communication With MIMO Antennas
May 24, 2012, 12:00am PDT
Along with the wide deployment of high-speed railway at more than 300 km/h, providing various services effectively for users in the train becomes both practical demand and interesting challenge...
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
Hybrid Virtual Network Embedding With K-Core Decomposition and Time-Oriented Priority
May 24, 2012, 12:00am PDT
Network virtualization provides a powerful tool to allow multiple networks, each customized to a specific purpose, to run on a shared substrate. However, a big challenge is how to map multiple...
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
Joint Time-Varying Channel Estimation With Dual-ICI Cancellation in OFDM Systems
May 24, 2012, 12:00am PDT
Channel estimation plays a vital role in coherent detection and demodulation in Orthogonal Frequency Division Multiplexing (OFDM) systems. However, the channel time-variation leads to tremendous...
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
Interference-Aware Resource Allocation in Co-Channel Deployment of OFDMA Femtocells
May 24, 2012, 12:00am PDT
Macrocells may suffer serious uplink interference introduced by the deployment of co-channel femtocells. In this paper, an interference-aware pricing-based resource allocation algorithm for...
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
An Indirect Reciprocity Game Theoretic Framework for Dynamic Spectrum Access
May 24, 2012, 12:00am PDT
In this paper, the authors propose a spectrum access framework to address the efficient allocation of channels of a Base Station (BS) by stimulating cooperation between Primary Users (PUs) and...
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
Spectrum Sharing and Resource Allocation for Energy-Efficient Heterogeneous Cognitive Radio Networks With Femtocells
May 24, 2012, 12:00am PDT
In heterogeneous wireless networks with femtocells, the issue of interference between femtocells and macrocells should be carefully considered. Using cognitive radio for interference management is...
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
Optimal Power Allocation and Relay Selection in Dual-Hop and Multi-Hop Cognitive Networks
May 24, 2012, 12:00am PDT
In this paper, the authors consider a cognitive relay network which contains a source node, a destination node and a group of network clusters each consisting of several cognitive relay nodes....
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
Zero-Forcing Based MIMO Two-Way Relay With Relay Antenna Selection: Transmission Scheme and Diversity Analysis
May 24, 2012, 12:00am PDT
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
Limited Feedback Scheme Based on Zero-Forcing Precoding for Multiuser MIMO-OFDM Downlink Systems
April 19, 2010, 12:00am PDT
Conventional zero-forcing precoding was well investigated, but it hadn't considered the Channel Quality Indicator (CQI) mismatch for practical system with limited feedback. This paper studies a...
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
Location Optimization for Decode-and-Forward Opportunistic Cooperative Networks
April 19, 2010, 12:00am PDT
In this paper, the authors investigate the location optimization for Decode-and-Forward (DF) opportunistic cooperative networks, in which the impact of the availability of the direct link between...
Provided by Beijing University of Posts and Telecommunications
-
Whitepapers
Energy-Efficient Spectrum Sharing and Power Allocation in Cognitive Radio Femto-cell Networks
January 14, 2012, 12:00am PST
Both cognitive radio and femtocell have been considered as promising techniques in wireless networks. However, most of previous works are focused on spectrum sharing and interference avoidance,...
Provided by Beijing University of Posts and Telecommunications
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