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tdma - cdma
(1644 results)-
White Papers
A Frequency Estimation for TD-SCDMA UE Based on Phase Difference
Apr 2011
This paper describes a new method of frequency estimation in cell search of TD-SCDMA system. Before identifying the scrambling code and Midamble code, using part of sync-dl code data for frequency...
Provided by mecs-press
-
White Papers
Performance Analysis of QoS Multicast Routing in Mobile Ad Hoc Networks Using Directional Antennas
Dec 2010
In this paper, a Quality of Service (QoS) multicast routing protocol in Mobile Ad hoc NETworks (MANETs) by using directional antennas has been presented. Many important applications, such as...
Provided by mecs-press
-
White Papers
Performance Analysis of Chaotic DS-CDMA With CSK Modulation
Apr 2012
Direct Sequence-Code Division Multiple Access (DS-CDMA) technique is used in cellular systems where users in the cell are separated from each other with their unique spreading codes. In recent...
Provided by Academy & Industry Research Collaboration Center
-
White Papers
Effect of Interleaved FEC Code on Wavelet Based MC-CDMA System With Alamouti STBC in Different Modulation Schemes
Feb 2012
In this paper, the impact of Forward Error Correction (FEC) code namely Trellis code with interleaver on the performance of wavelet based MC-CDMA wireless communication system with the...
Provided by Academy & Industry Research Collaboration Center
-
White Papers
Power and Rate Control Outage Based in CDMA Wireless Networks Under MAI and Heterogeneous Traffic Sources
Jan 2011
The authors characterize the maximum throughput achievable for the up-link of a power-controlled WCDMA wireless system with variable spreading factor. Their system model includes multi access...
Provided by KTH - Royal Institute of Technology
-
White Papers
Joint Channel Synchronization Under Interference Limited Conditions
Oct 2007
Spectral efficiency is of great concern in the return channel of satellite based broadband systems. In the feasibility of increased efficiency by reducing channel spacing below the Symbol Rate was...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Power and Rate Control Outage Based in CDMA Wireless Networks
Jan 2012
The authors characterize the maximum throughput achievable for the up-link of a power-controlled WCDMA wireless system with variable spreading factor. Their system model includes multi access...
Provided by University of Padova
-
White Papers
Distributed Interference Management in Femtocell Networks
Jun 2011
This paper considers a two-tier cellular network wherein femtocell users, who communicate with their homeowner-deployed base stations, share the same frequency band with macrocell users by...
Provided by University of Manitoba
-
White Papers
A Delay-Minimizing Routing Strategy for Wireless Multi-Hop Networks
May 2009
The authors consider a network where each route comprises a backlogged source, a number of relays and a destination at a finite distance. The locations of the sources and the relays are...
Provided by University of California
-
White Papers
Information Efficiency and Transmission Range Optimization for Coded MIMO FH-CDMA Ad Hoc Networks in Time-Varying Environments
Jan 2010
Optimization of the transmission range in terms of maximizing information efficiency is studied in this paper for Mobile Ad hoc NETworks (MANETs) with Frequency-Hopped (FH) CDMA and multiple...
Provided by Institute of Electrical & Electronic Engineers
-
White Papers
Lifetime Maximization in Wireless Sensor Network Using Cross Layer Design: A Design Review
Jan 2009
In the authors' paper, they consider the comparison performance of wireless sensor network to optimize the event detection and TDMA schemes using cross layer interaction. They consider the...
Provided by Institute of Electrical & Electronic Engineers
-
White Papers
Transmission Range Optimization for FH-CDMA Networks in Time-Varying Channels
Jan 2008
Optimization of the transmission range for maximizing information efficiency is studied in this paper for mobile ad hoc networks with Frequency-Hopped (FH) CDMA and multiple antennas. Realistic...
Provided by Institute of Electrical & Electronic Engineers
-
White Papers
A Robust Coded MIMO FH-CDMA Transceiver for Mobile Ad Hoc Networks
Sep 2007
In this paper, the authors develop a coded MIMO FHCDMA transceiver that is robust to partial-band jamming and the near-far problem for ad hoc networks with high mobility. Spatial and frequency...
Provided by Institute of Electrical & Electronic Engineers
-
White Papers
LTE Coverage Improvement by TTI Bundling
Mar 2009
Compared to WCDMA, the LTE radio access has a significantly shorter Transmission Time Interval (TTI) in order to reduce end-to-end delays. However, if a User Equipment (UE) at the cell edge is...
Provided by Institute of Electrical & Electronic Engineers
-
White Papers
Field Trial Results on Multi-User MIMO Downlink OFDMA in Typical Outdoor Scenario Using Proportional Fair Scheduling
Mar 2008
In this paper, the authors present first real-time outdoor multi-user multi-antenna measurements based on system parameters close to 3GPP-Long Term Evolution. They demonstrate switching between...
Provided by Nokia Siemens Networks
-
White Papers
Cognitive Spectrum Access for Underwater Acoustic Communications
Mar 2008
While very successful in traditional radio communications, the usage of TDMA and CSMA schemes for underwater acoustic communications is severely limited in efficiency and scalability, primarily...
Provided by University of Padova
-
White Papers
A Detailed Simulation Study of the UWAN-MAC Protocol for Underwater Acoustic Networks
Aug 2007
In this paper, the authors present a simulation study of UWAN-MAC, a recently proposed Medium Access Control (MAC) protocol for underwater acoustic networks. While the assumptions behind the...
Provided by University of Padova
-
White Papers
Multiuser Two-Way Relaying: Detection and Interference Management Strategies
Aug 2009
The authors consider a multiuser two-way relay network where multiple pairs of users communicate with their preassigned partners, using a common intermediate relay node, in a two-phase...
Provided by Institute of Electrical & Electronic Engineers
-
White Papers
A Study of the Correlations Between Channel and Traffic Statistics in Multihop Networks
Nov 2007
This paper investigates the correlations between traffic statistics and channel qualities and their impact on the performance of multihop networks. Since, a node contributes to interference only...
Provided by Institute of Electrical & Electronic Engineers
-
White Papers
Cross-Layer Energy Minimization in TDMA-Based Sensor Networks
Nov 2010
The authors consider sensor networks where energy is a limited resource so that energy consumption must be minimized while satisfying given throughput requirements. Moreover, energy consumption...
Provided by Stanford University
-
White Papers
Mixed Integer-Linear Programming for Link Scheduling in Interference-Limited Networks
Nov 2010
The authors consider the problem of link scheduling in wireless networks with interference. The problem of computing a link schedule to minimize the power consumption with the constraint that each...
Provided by Stanford University
-
White Papers
MAC Protocols for Wireless Sensor Networks: Tackling the Problem of Unidirectional Links
Feb 2010
Experiments have shown that unidirectional links are quite common in wireless sensor networks. Still, many MAC protocols ignore their existence, even though they have a tremendous impact on the...
Provided by Brandenburg University of Technology
-
White Papers
Comparative Performance of Hybrid SCM SACOCDMA System Using Complementary and Subtraction Detection Techniques
Jan 2008
This paper presents the comparative performance of two detection schemes based on subtraction detection technique for a hybrid scheme of Sub-Carrier Multiplexed Spectral-Amplitude-Coding Optical...
Provided by Universiti Putra Malaysia
-
White Papers
A Bidirectional Semi-Passive DS-CDMA-RFID Transponder for the UHF Band
Jul 2011
This paper presents a first realization of a semi-passive UHF RFID transponder featuring a direct sequence code division multiple access channel access method for the RFID up-link, and, in...
Provided by IARIA
-
White Papers
Software Defined Radio as a DS-CDMA Receiver
Jul 2011
Programmable radio is one of the latest trends in the construction of multi-standard receivers. The technology, called Software Defined Radio (SDR), is also an ideal test platform that allows...
Provided by IARIA
-
White Papers
An Interference Avoiding Wireless Network Architecture for Coexistence of CDMA 2000 1x EVDO and LTE Systems
Jul 2011
Interference between two RAT (Radio Access Technology) wireless networks will lead to the system capacity deduction. In this paper, system capacity loss was analyzed by using snapshot method and...
Provided by IARIA
-
White Papers
Experimentation and Performance Analysis of Multi-Interfaced Mobile Router Scheme
Sep 2009
NEtwork MObility (NEMO) aims providing seamless Internet connectivity of the whole mobile network that consists of Mobile Routers (MRs) and Mobile Network Nodes (MNNs). The network moves around...
Provided by Reed Elsevier
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White Papers
A Fast Bandwidth Request and Grant Method for IEEE 802.16 OFDMA/TDD Systems
Nov 2011
In the design of a contention-based bandwidth request scheme, decrease in data transmission delay is the most important factor. This paper proposes a new CDMA-based bandwidth request method in...
Provided by IARIA
-
White Papers
DS-CDMA Receiver in Software Defined Radio Technology
Jul 2011
Programmable radio is one of the latest trends in the construction of multi-standard receivers. The technology, called Software Defined Radio (SDR), is also an ideal test platform that allows to...
Provided by IARIA
-
White Papers
A Solution for Seamless Video Delivery in WLAN/3G Networks
Jul 2011
In this paper, the authors introduce a Session Proxy (SP) into a scenario in which Wireless Local Area Network (WLAN) and 3th Generation of networks cellular (3G networks) are integrated using...
Provided by IARIA
-
White Papers
Performance Analysis of Receive Collaboration in TDMA-Based Wireless Sensor Networks
Jul 2011
This paper presents a general framework to enable the implementation of receive collaboration in Wireless Sensor Networks (WSN). The framework also allows the evaluation of Collaborative Channel...
Provided by IARIA
-
White Papers
An Integrated Cluster-Based Multi-Channel MAC Protocol for Mobile Ad Hoc Networks
Nov 2007
This paper proposes a novel joint clustering and multi-channel Medium Access Control (MAC) protocol for mobile ad hoc networks, based on a scalable two-phase coding scheme. It employs the...
Provided by Institute of Electrical & Electronic Engineers
-
White Papers
A Divergence Minimization Approach to Joint Multiuser Decoding for Coded CDMA
Apr 2008
In this paper, a theoretical framework of Divergence Minimization (DM) is applied to derive iterative receiver algorithms for coded CDMA systems. The DM receiver obtained performs joint channel...
Provided by Institute of Electrical & Electronic Engineers
-
White Papers
Seamless Handover Between CDMA2000 and 802.11 WLAN Using MSCTP
Apr 2012
The invention of mobile devices such as laptops, hand-held computers, and cellular phones has changed the whole Internet world. The main feature of mobile devices is that they can access the...
Provided by Universal Association of Computer and Electronics Engineers
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Whitepapers
Case Study: How Cumulus Media Took Control of Telecom and Slashed Costs
May 2012
For Cumulus Media, a string of 100 acquisitions resulted in a chaotic array of carriers, calling plans and features. Rather than a manageable group of core service providers and carriers, the...
Provided by Cass Information Systems
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White Papers
A New Hybrid Approach for Heterogeneous Radio Access Technology Selection
Jan 2012
Over the past twenty years, a number of wireless technologies were developed. The first generation systems are based on analog radio transmission. The Second Generation systems 2G brought a number...
Provided by Science Publications
-
White Papers
MPR-Aware Performance Improvement for Inter-Domain Routing in MANETs
Aug 2011
Inter-domain routing for MANETs (Mobile Ad Hoc NETworks) draws increasing attention in military and civil application. It works on heterogeneous networking protocols, including different MAC layer...
Provided by University of California
-
White Papers
Medium Access for a Military Narrowband Wireless Ad-Hoc Network; Requirements and Initial Approaches
Sep 2008
This paper presents the initial requirements for a tactical military MANET and their implications on the design of a Medium Access Control (MAC) protocol. The main focus is on TDMA based mobile...
Provided by Institute of Electrical & Electronic Engineers
-
White Papers
Performance Analysis of Multi-User Multi Input Multi Output-Interleave-Division Multiple-Access System Employing Turbo Coding With Multi-User Detection Over Frequency-Selective Wireless Communication Channel
Feb 2011
Code division multiple access system is the most widely used system for multi-user communications. But the performances of CDMA is limited by multiple access interference and inter symbol...
Provided by Science Publications
-
White Papers
Performance of MMSE Receiver Based Multi Input Multi Output-Interleave Division Multiple-Access System with Multi-user Detection Over Frequency Selective Wireless Communication Channel
Jun 2011
Code division multiple access system is the most widely used system for multi-user communications. But the performance of CDMA is limited by multiple access interference and inter symbol...
Provided by Science Publications
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White Papers
Efficient Resource Allocation in MC-CDMA Cellular Wireless Networks to Support Multimedia Traffic
Jun 2009
The Multi Carrier Code Division Multiple Access (MC-CDMA) system with time division duplex mode, adopting unbalanced slot allocation between uplink and downlink, is a good solution for asymmetric...
Provided by JATIT
-
White Papers
Performance Enhancement of STBC OFDM-CDMA System Using Channel Coding Techniques Over Multipath Fading Channel
Jun 2009
In this paper, a mitigation method for minimizing the distortion caused by frequency selective fast fading is illustrated. The proposed system combines between two types of diversity schemes;...
Provided by JATIT
-
White Papers
Reducing Transmission Losses in Body Area Networks Using Variable TDMA Scheduling
Apr 2011
The authors consider a typical Body Area Network (BAN) setting in which sensor nodes send data to a common hub regularly on a TDMA basis, as defined by the emerging IEEE 802.15.6 BAN standard....
Provided by University of Sydney
-
White Papers
Applying Channel Equalization Techniques to STBC OFDM - CDMA System in the Presence of Multi-Path Frequency Selective Channel Fading
May 2009
In this paper three systems are joined together in order to mitigate distortion effect caused by multipath fading. Those systems are; Space Time Block Coding (STBC), Code Division Multiple Access...
Provided by JATIT
-
White Papers
Performance Improvement of MC-CDMA System Through DSTBC Site Diversity
Dec 2008
Multi-Carrier Code Division Multiple Access (MC-CDMA) systems receive a great deal of attention due to their great potential in achieving high data rates in wireless communication. Nevertheless,...
Provided by JATIT
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White Papers
Review and Implications of Time Division Multiple Access Techniques for Wireless Environment Services and Applications
Oct 2008
Time Division Multiple Access (TDMA) is a channel access method for shared medium (usually radio) networks. It allows several users to share the same frequency channel by dividing the signal into...
Provided by JATIT
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White Papers
Performance Enhancement of MC-DS/CDMA System Using Chaotic Spreading Sequence
Nov 2008
A novel chaotic spreading sequence for Multi-Carrier Direct Sequence Code Division Multiple Access (MC-DS/CDMA) system is proposed. With this spreading sequence in the MC-DS/CDMA system, the...
Provided by JATIT
-
White Papers
Modified Uniform Triangular Array for Online Full Azimuthal Coverage Via JADE-MUSIC Algorithm Over MIMO-CDMA Channel
Jul 2010
This paper investigates a Modified Uniform Triangular Array (MUTA) to support online space-time MIMO-CDMA location based services with full azimuthal coverage via JADE-MUSIC algorithm. A new...
Provided by University of Tunis El Manar
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White Papers
An Efficient Paging Algorithm for Multi-Carrier CDMA System
May 2011
To cope with the increasing demand of wireless communication services multi-carrier systems are being used. Radio resources are very limited and efficient usages of these resources are inevitable...
Provided by Khulna University
-
White Papers
Survey of Latest Wireless Cellular Technologies for Enhancement of Spectral Density at Reduced Cost
May 2011
Mobile devices together with the intelligence that will be embedded in human environments - home, office, public places - will create a new platform that enables ubiquitous sensing, computing,...
Provided by Singhania University
-
White Papers
Asynchronous CDMA Systems With Random Spreading - Part I: Fundamental Limits
Nov 2009
Spectral efficiency for asynchronous Code Division Multiple Access (CDMA) with random spreading is calculated in the large system limit allowing for arbitrary chip waveforms and frequency-flat...
Provided by Norwegian University of Science and Technology
-
White Papers
Asynchronous CDMA Systems With Random Spreading - Part II: Design Criteria
Nov 2009
Totally asynchronous Code-Division Multiple-Access (CDMA) systems are addressed. In Part I, the fundamental limits of asynchronous CDMA systems are analyzed in terms of spectral efficiency and...
Provided by University of South Australia
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White Papers
The Performance of Genetic Algorithm for Synchronized Chaotic Chen System in CDMA Satellite Channel
Jan 2011
Synchronization is a difficult problem in CDMA satellite communications. Due to the influence of additive noise and fading in the mobile channel, it is not easy to keep up with the attenuation and...
Provided by World Academy of Science, Engineering and Technology
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White Papers
Enhanced Double Weight Code Implementation in Multi-Rate Transmission
Dec 2007
This paper presents new code ability in supporting multiple transmission rates in Point To Point (P2P) Spectral Amplitude Coding-Optical Code Division Multiple Access (SAC-OCDMA) links. Enhanced...
Provided by Multimedia University
-
White Papers
Towards Power Efficient MAC Protocol for In-Body and On-Body Sensor Networks
Feb 2010
This paper presents an empirical discussion on the design and implementation of a power-efficient Medium Access Control (MAC) protocol for in-body and on-body sensor networks. The authors analyze...
Provided by Springer Science+Business Media
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White Papers
System Performance Comparison of Turbo and Trellis Coded Optical CDMA Systems
Jan 2011
In this paper, the authors have compared the performance of a Turbo and Trellis coded Optical Code Division Multiple Access (OCDMA) system. The comparison of the two codes has been accomplished by...
Provided by University of Delhi
-
White Papers
RCFT : Re-Clustering Formation Technique in Hierarchical Sensor Network
Nov 2009
Because of limited energy of nodes, an important issue for sensor network is efficient use of the energy. The clustering technique reduces energy consumption as cluster head sends sensed...
Provided by Soongsil University
-
White Papers
Energy Efficiency of Adaptive-Rate Medium Access Control Protocols for Sensor Networks
Jun 2009
Energy efficient protocol design is the aim of current researches in the area of sensor networks where limited power resources impose energy conservation considerations. In this paper the authors...
Provided by K.N.Toosi University of Technology
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White Papers
Interest of the Sequences Pseudo Noises Codes of Different Lengths for the Reduction From the Interference Between Users of CDMA Network
Jun 2009
The Third Generation (3G) of cellular system adopted the spread spectrum as solution for the transmission of the data in the physical layer. Contrary to systems IS-95 or CDMAOne (systems with...
Provided by Institut National Polytechnique Felix Houphouet Boigny
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White Papers
Real-Time and Embedded Systems Building Blocks for Cyber-Physical Systems
Jul 2008
By converging the cyber world with the physical world, Cyber-Physical Systems (CPS) is expected to create a great impact on computer science and the society. This paper proposes several real-time...
Provided by University of Illinois
-
White Papers
Defect Cause Modeling With Decision Tree and Regression Analysis
Jun 2009
Power line channel is proposed as an alternative for broadband data transmission especially in developing countries like Tanzania. However the channel is affected by stochastic attenuation and...
Provided by Uppsala University
-
White Papers
Statistical Mechanical Analysis of the Kronecker Channel Model for MIMO Wireless Communication
Sep 2009
The Kronecker channel model of wireless communication is analyzed using statistical mechanics methods. In the model, spatial proximities among transmission/reception antennas are taken into...
Provided by Tokyo Institute of Technology
-
White Papers
Blind User Detection in Doubly-Dispersive DS/CDMA Fading Channels
Sep 2009
In this paper, the authors consider the problem of detecting the presence of a new user in a Direct-Sequence/Code-Division-Multiple-Access (DS/CDMA) system with a doubly-dispersive fading channel,...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Performance Limits of Fair-Access in Sensor Networks With Linear and Selected Grid Topologies
Nov 2007
This paper investigates fundamental performance limits of Medium Access Control (MAC) protocols for multi-hop sensor networks. A unique aspect of this study is the modeling of a fair-access...
Provided by University of Alabama
-
White Papers
Scheduling Data Delivery in Heterogeneous Wireless Sensor Networks
Sep 2009
In this paper the authors present a proxy-level scheduler that can significantly improve QoS in heterogeneous wireless sensor networks while at the same time reducing the overall power...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Hierarchical Genetic Algorithm for Dynamic Channel Units Allocation in TD-CDMA/ TDD System
Nov 2009
Hierarchical Genetic Algorithms (HGA) as a tool for search and optimizing methodology have now reached a mature stage. The minimum resource facility to carry user traffic, termed a Channel Unit...
Provided by Kainan University
-
White Papers
General Model for Single and Multiple Channels WLANs With Quality of Service Support
Nov 2009
In this paper the authors develop an intergraded model for request mechanism and data transmission in the uplink phase in the presence of channel noise. This model supports quality of service. The...
Provided by University of Victoria
-
White Papers
Performance of MC-MC CDMA Systems With Nonlinear Models of HPA
Feb 2011
A new wireless communication system denoted as Multi-Code Multi-Carrier CDMA (MC-MC CDMA), which is the combination of Multi-Code CDMA and Multi-Carrier CDMA, is analyzed in this paper. This...
Provided by AIRCC
-
White Papers
Using the Physical Layer for Wireless Authentication in Time-Variant Channels
Jul 2009
The wireless medium contains domain-specific information that can be used to complement and enhance traditional security mechanisms. In this paper the authors propose ways to exploit the spatial...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Congestion Avoidance in IP Based CDMA Radio Access Network
Feb 2011
CDMA is an important air interface technologies for cellular wireless networks. As CDMA-based cellular networks mature, the current point-to-point links will evolve to an IP-based Radio Access...
Provided by ICFAI University
-
White Papers
ATMA: Advertisement-Based TDMA Protocol for Bursty Traffic in Wireless Sensor Networks
Mar 2010
Energy conservation is one of the primary goals of the majority of MAC protocols designed for wireless sensor networks. In Sensor-MAC (S-MAC), one of the first MAC protocols designed for sensor...
Provided by University of Rochester
-
White Papers
Adaptation of TDMA Parameters Based on Network Conditions
Jan 2009
Soft clustering of the nodes combined with Time Division Multiple Access (TDMA) channel access within a cluster has been shown to provide an energy-efficient solution for Mobile Ad-Hoc NETworks...
Provided by University of Rochester
-
White Papers
The Impact of Cell Site Re-Homing on the Performance of UMTS Core Networks
Mar 2010
Mobile operators currently prefer optimizing their radio networks via re-homing or cutting over the cell sites in 2G or 3G networks. The core network, as the parental part of radio network, is...
Provided by Stevens Institute of Technology
-
White Papers
Statistical Mechanical Analysis of the Linear Vector Channel in Digital Communication
Nov 2007
A statistical mechanical framework to analyze linear vector channel models in digital wireless communication is proposed for a large system. The framework is a generalization of that proposed for...
Provided by Tokyo Institute of Technology
-
White Papers
Performance Evaluation of QoS Parameters in UMTS Network Using Qualnet
Nov 2010
UMTS network based on the Wide Band-CDMA technology is a 3rd generation telecommunication system which provides various multimedia applications along with the conventional telephony service. These...
Provided by Guru Nanak Dev University
-
White Papers
A Dynamic MAC Protocol With Adaptive Power Control for WCDMA Networks
Mar 2011
In Wideband Code-Division Multiple-Access (WCDMA) systems, all users share the same time and frequency resources and may lead to near far problem, where power control forms an effective solution....
Provided by Sipnas college of Engineering & Technology
-
White Papers
Comparison of Performance Metrics for QPSK and OQPSK Transmission Using Root Raised Cosine & Raised Cosine Pulse-Shaping Filters for Applications in Mobile Communication
Dec 2009
Quadrature Phase Shift Keying (QPSK) and Offset Quadrature Phase Shift Keying (OQPSK) are two wellaccepted modulation techniques used in Code Division Multiple Access (CDMA) system. The...
Provided by Jadavpur University
-
White Papers
Spreading Code and Widely-Linear Receiver Design: Non-Cooperative Games for Wireless CDMA Networks
Jun 2009
The issue of non-cooperative transceiver optimization in the uplink of a multiuser wireless code division multiple access data network with widely-linear detection at the receiver is considered....
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
CR-Mac: A Multichannel Mac Protocol for Cognitive Radio Ad Hoc Networks
Sep 2010
This paper proposes a cross-layer based cognitive radio multichannel Medium Access Control (MAC) protocol with TDMA, which integrate the spectrum sensing at PHYsical (PHY) layer and the packet...
Provided by AIRCC
-
White Papers
A Physical Model of Wireless Network
May 2009
Using an approach developed in physics, the authors propose a new framework for the study of cellular networks. The key idea of the physical network model they propose is to replace the discrete...
Provided by Issy-les-Moulineaux
-
White Papers
Performance Analysis of Chaotic DS-CDMA With CSK Modulation
Apr 2012
Direct Sequence-Code Division Multiple Access (DS-CDMA) technique is used in cellular systems where users in the cell are separated from each other with their unique spreading codes. In recent...
Provided by Academy & Industry Research Collaboration Center
-
White Papers
Effect of Interleaved FEC Code on Wavelet Based MC-CDMA System With Alamouti STBC in Different Modulation Schemes
Feb 2012
In this paper, the impact of Forward Error Correction (FEC) code namely Trellis code with interleaver on the performance of wavelet based MC-CDMA wireless communication system with the...
Provided by Academy & Industry Research Collaboration Center
-
White Papers
Power and Rate Control Outage Based in CDMA Wireless Networks Under MAI and Heterogeneous Traffic Sources
Jan 2011
The authors characterize the maximum throughput achievable for the up-link of a power-controlled WCDMA wireless system with variable spreading factor. Their system model includes multi access...
Provided by KTH - Royal Institute of Technology
-
White Papers
Joint Channel Synchronization Under Interference Limited Conditions
Oct 2007
Spectral efficiency is of great concern in the return channel of satellite based broadband systems. In the feasibility of increased efficiency by reducing channel spacing below the Symbol Rate was...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Power and Rate Control Outage Based in CDMA Wireless Networks
Jan 2012
The authors characterize the maximum throughput achievable for the up-link of a power-controlled WCDMA wireless system with variable spreading factor. Their system model includes multi access...
Provided by University of Padova
-
White Papers
Distributed Interference Management in Femtocell Networks
Jun 2011
This paper considers a two-tier cellular network wherein femtocell users, who communicate with their homeowner-deployed base stations, share the same frequency band with macrocell users by...
Provided by University of Manitoba
-
White Papers
A Delay-Minimizing Routing Strategy for Wireless Multi-Hop Networks
May 2009
The authors consider a network where each route comprises a backlogged source, a number of relays and a destination at a finite distance. The locations of the sources and the relays are...
Provided by University of California
-
White Papers
Information Efficiency and Transmission Range Optimization for Coded MIMO FH-CDMA Ad Hoc Networks in Time-Varying Environments
Jan 2010
Optimization of the transmission range in terms of maximizing information efficiency is studied in this paper for Mobile Ad hoc NETworks (MANETs) with Frequency-Hopped (FH) CDMA and multiple...
Provided by Institute of Electrical & Electronic Engineers
-
White Papers
Lifetime Maximization in Wireless Sensor Network Using Cross Layer Design: A Design Review
Jan 2009
In the authors' paper, they consider the comparison performance of wireless sensor network to optimize the event detection and TDMA schemes using cross layer interaction. They consider the...
Provided by Institute of Electrical & Electronic Engineers
-
White Papers
Transmission Range Optimization for FH-CDMA Networks in Time-Varying Channels
Jan 2008
Optimization of the transmission range for maximizing information efficiency is studied in this paper for mobile ad hoc networks with Frequency-Hopped (FH) CDMA and multiple antennas. Realistic...
Provided by Institute of Electrical & Electronic Engineers
-
White Papers
A Robust Coded MIMO FH-CDMA Transceiver for Mobile Ad Hoc Networks
Sep 2007
In this paper, the authors develop a coded MIMO FHCDMA transceiver that is robust to partial-band jamming and the near-far problem for ad hoc networks with high mobility. Spatial and frequency...
Provided by Institute of Electrical & Electronic Engineers
-
White Papers
LTE Coverage Improvement by TTI Bundling
Mar 2009
Compared to WCDMA, the LTE radio access has a significantly shorter Transmission Time Interval (TTI) in order to reduce end-to-end delays. However, if a User Equipment (UE) at the cell edge is...
Provided by Institute of Electrical & Electronic Engineers
-
White Papers
Field Trial Results on Multi-User MIMO Downlink OFDMA in Typical Outdoor Scenario Using Proportional Fair Scheduling
Mar 2008
In this paper, the authors present first real-time outdoor multi-user multi-antenna measurements based on system parameters close to 3GPP-Long Term Evolution. They demonstrate switching between...
Provided by Nokia Siemens Networks
-
White Papers
Cognitive Spectrum Access for Underwater Acoustic Communications
Mar 2008
While very successful in traditional radio communications, the usage of TDMA and CSMA schemes for underwater acoustic communications is severely limited in efficiency and scalability, primarily...
Provided by University of Padova
-
White Papers
A Detailed Simulation Study of the UWAN-MAC Protocol for Underwater Acoustic Networks
Aug 2007
In this paper, the authors present a simulation study of UWAN-MAC, a recently proposed Medium Access Control (MAC) protocol for underwater acoustic networks. While the assumptions behind the...
Provided by University of Padova
-
White Papers
Multiuser Two-Way Relaying: Detection and Interference Management Strategies
Aug 2009
The authors consider a multiuser two-way relay network where multiple pairs of users communicate with their preassigned partners, using a common intermediate relay node, in a two-phase...
Provided by Institute of Electrical & Electronic Engineers
-
White Papers
A Study of the Correlations Between Channel and Traffic Statistics in Multihop Networks
Nov 2007
This paper investigates the correlations between traffic statistics and channel qualities and their impact on the performance of multihop networks. Since, a node contributes to interference only...
Provided by Institute of Electrical & Electronic Engineers
-
White Papers
Cross-Layer Energy Minimization in TDMA-Based Sensor Networks
Nov 2010
The authors consider sensor networks where energy is a limited resource so that energy consumption must be minimized while satisfying given throughput requirements. Moreover, energy consumption...
Provided by Stanford University
-
White Papers
Mixed Integer-Linear Programming for Link Scheduling in Interference-Limited Networks
Nov 2010
The authors consider the problem of link scheduling in wireless networks with interference. The problem of computing a link schedule to minimize the power consumption with the constraint that each...
Provided by Stanford University
-
White Papers
MAC Protocols for Wireless Sensor Networks: Tackling the Problem of Unidirectional Links
Feb 2010
Experiments have shown that unidirectional links are quite common in wireless sensor networks. Still, many MAC protocols ignore their existence, even though they have a tremendous impact on the...
Provided by Brandenburg University of Technology
-
White Papers
Comparative Performance of Hybrid SCM SACOCDMA System Using Complementary and Subtraction Detection Techniques
Jan 2008
This paper presents the comparative performance of two detection schemes based on subtraction detection technique for a hybrid scheme of Sub-Carrier Multiplexed Spectral-Amplitude-Coding Optical...
Provided by Universiti Putra Malaysia
-
White Papers
A Bidirectional Semi-Passive DS-CDMA-RFID Transponder for the UHF Band
Jul 2011
This paper presents a first realization of a semi-passive UHF RFID transponder featuring a direct sequence code division multiple access channel access method for the RFID up-link, and, in...
Provided by IARIA
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White Papers
Software Defined Radio as a DS-CDMA Receiver
Jul 2011
Programmable radio is one of the latest trends in the construction of multi-standard receivers. The technology, called Software Defined Radio (SDR), is also an ideal test platform that allows...
Provided by IARIA
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White Papers
An Interference Avoiding Wireless Network Architecture for Coexistence of CDMA 2000 1x EVDO and LTE Systems
Jul 2011
Interference between two RAT (Radio Access Technology) wireless networks will lead to the system capacity deduction. In this paper, system capacity loss was analyzed by using snapshot method and...
Provided by IARIA
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White Papers
Experimentation and Performance Analysis of Multi-Interfaced Mobile Router Scheme
Sep 2009
NEtwork MObility (NEMO) aims providing seamless Internet connectivity of the whole mobile network that consists of Mobile Routers (MRs) and Mobile Network Nodes (MNNs). The network moves around...
Provided by Reed Elsevier
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White Papers
A Fast Bandwidth Request and Grant Method for IEEE 802.16 OFDMA/TDD Systems
Nov 2011
In the design of a contention-based bandwidth request scheme, decrease in data transmission delay is the most important factor. This paper proposes a new CDMA-based bandwidth request method in...
Provided by IARIA
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White Papers
DS-CDMA Receiver in Software Defined Radio Technology
Jul 2011
Programmable radio is one of the latest trends in the construction of multi-standard receivers. The technology, called Software Defined Radio (SDR), is also an ideal test platform that allows to...
Provided by IARIA
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White Papers
A Solution for Seamless Video Delivery in WLAN/3G Networks
Jul 2011
In this paper, the authors introduce a Session Proxy (SP) into a scenario in which Wireless Local Area Network (WLAN) and 3th Generation of networks cellular (3G networks) are integrated using...
Provided by IARIA
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White Papers
Performance Analysis of Receive Collaboration in TDMA-Based Wireless Sensor Networks
Jul 2011
This paper presents a general framework to enable the implementation of receive collaboration in Wireless Sensor Networks (WSN). The framework also allows the evaluation of Collaborative Channel...
Provided by IARIA
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White Papers
An Integrated Cluster-Based Multi-Channel MAC Protocol for Mobile Ad Hoc Networks
Nov 2007
This paper proposes a novel joint clustering and multi-channel Medium Access Control (MAC) protocol for mobile ad hoc networks, based on a scalable two-phase coding scheme. It employs the...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
A Divergence Minimization Approach to Joint Multiuser Decoding for Coded CDMA
Apr 2008
In this paper, a theoretical framework of Divergence Minimization (DM) is applied to derive iterative receiver algorithms for coded CDMA systems. The DM receiver obtained performs joint channel...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Seamless Handover Between CDMA2000 and 802.11 WLAN Using MSCTP
Apr 2012
The invention of mobile devices such as laptops, hand-held computers, and cellular phones has changed the whole Internet world. The main feature of mobile devices is that they can access the...
Provided by Universal Association of Computer and Electronics Engineers
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Whitepapers
Case Study: How Cumulus Media Took Control of Telecom and Slashed Costs
May 2012
For Cumulus Media, a string of 100 acquisitions resulted in a chaotic array of carriers, calling plans and features. Rather than a manageable group of core service providers and carriers, the...
Provided by Cass Information Systems
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White Papers
A New Hybrid Approach for Heterogeneous Radio Access Technology Selection
Jan 2012
Over the past twenty years, a number of wireless technologies were developed. The first generation systems are based on analog radio transmission. The Second Generation systems 2G brought a number...
Provided by Science Publications
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White Papers
MPR-Aware Performance Improvement for Inter-Domain Routing in MANETs
Aug 2011
Inter-domain routing for MANETs (Mobile Ad Hoc NETworks) draws increasing attention in military and civil application. It works on heterogeneous networking protocols, including different MAC layer...
Provided by University of California
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White Papers
Medium Access for a Military Narrowband Wireless Ad-Hoc Network; Requirements and Initial Approaches
Sep 2008
This paper presents the initial requirements for a tactical military MANET and their implications on the design of a Medium Access Control (MAC) protocol. The main focus is on TDMA based mobile...
Provided by Institute of Electrical & Electronic Engineers
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White Papers
Performance Analysis of Multi-User Multi Input Multi Output-Interleave-Division Multiple-Access System Employing Turbo Coding With Multi-User Detection Over Frequency-Selective Wireless Communication Channel
Feb 2011
Code division multiple access system is the most widely used system for multi-user communications. But the performances of CDMA is limited by multiple access interference and inter symbol...
Provided by Science Publications
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White Papers
Performance of MMSE Receiver Based Multi Input Multi Output-Interleave Division Multiple-Access System with Multi-user Detection Over Frequency Selective Wireless Communication Channel
Jun 2011
Code division multiple access system is the most widely used system for multi-user communications. But the performance of CDMA is limited by multiple access interference and inter symbol...
Provided by Science Publications
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White Papers
CDMA Vs. OFDM- Comparison and Hybrid OFDM- The Solution for the Next Generation
May 2012
This paper investigates the effectiveness of OFDM and proven in other conventional (narrowband) commercial radio technologies (e.g. DS-CDMA in cell phones) (e.g. OFDM in IEEE 802.11a/g). The main...
Provided by International Journal of Soft Computing and Engineering (IJSCE)
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White Papers
Throughput Analysis of Multi-Channel TD-CSMA System and Reinforcement Learning
May 2012
This paper generates a cognitive radio scenario based on non-persistent Carrier Sense Multiple Access (CSMA) and Time Division Multiple Access (TDMA) systems sharing a multi-channel wireless...
Provided by International Journal of Soft Computing and Engineering (IJSCE)
