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tdma - cdma
(1612 results)-
White Papers
MC-CDMA Scheme in Wi-Fi Environment
Jan 2012
The combination of OFDM and Code Division Multiple Access (CDMA) is seen as an attractive and practical solution to enhance the throughput and/or robustness for future high-speed indoor WLANs. The...
Provided by International Journal of Computer Science Issues
-
White Papers
A New Soft Handover Mechanism Using DCHs in 3GPP HSDPA Networks
May 2009
In 3GPP (Third Generation Partnership Project) Release 5 (R5), HSDPA (High-Speed Downlink Packet Access) has been standardized to enhance the data rate of downlink packet transmission on top of...
Provided by Academy Publisher
-
White Papers
Development of Efficient Query Processor in Cell Phone for Sensor Data Processing Over a WSN
May 2011
A query processor is designed for query-based multiple vital signs monitoring system to query sensor network and collect data. This monitoring system performs a local vital signs data analysis...
Provided by International Association of Computer Science & Information Technology (IACSIT)
-
White Papers
An Adaptive IEEE 802.15.4a TH-TDMA UWB Industrial Field Level Network
Jul 2010
The authors introduce the deployment of IEEE 802.15.4a in industrial field level communication, which is unexplored so far. Impulse Radio-Time Hopping Ultra Wide Band (IR-TH UWB) physical layer is...
Provided by Academy Publisher
-
White Papers
A Low-Complexity Optimum Multiuser Receiver for DS-CDMA Wireless Systems
Jun 2010
Multiuser detection is an important technology in wireless CDMA systems for improving both data rate as well as user capacity. However, the computational complexity of multiuser detection prevents...
Provided by Academy Publisher
-
White Papers
Performance Analysis of Power Line Communication Using DS-CDMA Technique With Adaptive Laguerre Filters
Jan 2012
This paper presents the system performance of the Power Line Communication (PLC) using Direct-Sequence Code Division Multiple Access (DS-CDMA) technique with an adaptive equalizer based on...
Provided by International Association of Computer Science & Information Technology (IACSIT)
-
White Papers
Performance Analysis of Parallel Interference Cancellation in Cyclic-Prefix CDMA
Jan 2012
Code Division Multiple Access with Cyclic Prefix (CP-CDMA) is regarded as one of the best candidates for the broadband wireless communication system. This paper proposes a Parallel Interference...
Provided by International Association of Computer Science & Information Technology (IACSIT)
-
White Papers
Multiband Digital Filter Design for WCDMA Systems
Jan 2012
This paper introduces structure characteristics, the basic principles of the Finite Impulse Response (FIR) digital filter, and design methods based on MATLAB simulation. FDATool in MATLAB is used...
Provided by International Association of Computer Science & Information Technology (IACSIT)
-
White Papers
Implementation of Self Interference Cancellation for WCDMA Repeater
Jan 2012
In this paper, the FPGA (Field Programmable Gate Array) implementation of self interference cancellation technique based on an adaptive LMS (Least Mean Square) algorithm is presented. By using the...
Provided by International Association of Computer Science & Information Technology (IACSIT)
-
White Papers
Design and Implementation of Instant Messaging System Based on CDMA Network
Jan 2012
Instant messaging is a basic wireless service of mobile network. The system on the basis of DTU, sends the collected data by short message to supervision center, so the system can carry out...
Provided by International Association of Computer Science & Information Technology (IACSIT)
-
White Papers
SAFNAQ, an Algorithm for Transmission Power Allocation in MCCDMA
Jan 2012
A power allocation algorithm for MC-CDMA communication systems is proposed. There are many algorithms of power allocation in MC-CDMA, e.g., Frequency Domain Power allocation Algorithm (FDPA), Time...
Provided by International Association of Computer Science & Information Technology (IACSIT)
-
White Papers
Network Structure and Capability Leveraging: Lesson From China's TD-SCDMA Industry Alliance
Jan 2012
After the acknowledgement of Time Division Synchronous Code Division Multiple Access (TD-SCDMA) international standard, China's TD-SCDMA industry alliance experiences high-speed development. As a...
Provided by International Association of Computer Science & Information Technology (IACSIT)
-
White Papers
A Theoretical Prediction of Users in WCDMA Interference
Jan 2011
The major problem that the authors are faced too in wireless systems is the interference. This problem contributes in limiting the performance of cellular networks. In 3G, Wide Code Division...
Provided by Journal of Theoretical and Applied Information Technology
-
White Papers
Newton Iteration Acceleration of the Nash Game Algorithm for Power Control in 3G Wireless CDMA Networks
Jan 2012
In wireless communication systems, each user's signal contributes to the interference seen by the other users. Given limited available battery power, this creates a need for effective and...
Provided by Rutgers University
-
White Papers
SIR-Based Power Control Algorithms for Wireless CDMA Networks: An Overview
Jan 2012
This paper summarizes and explains the main results on Signal to Interference Ratio (SIR) based power control algorithms, which are used to increase capacity and improve quality of service in...
Provided by Rutgers University
-
White Papers
Maximum Likelihood Binary Detection in Improper Complex Gaussian Noise
Oct 2007
In a wide range of communication systems, including DS-CDMA and OFDM systems, the signal-of-interest might be corrupted by an improper (also called non-circularly symmetric) interfering signal....
Provided by University of Toronto
-
White Papers
Randomized Data-Gathering Protocol for Time-Driven Sensor Networks
Aug 2011
Proactive or time-driven sensor networks are devoted to the continuous reporting of environmental data to a sink or base station. An important issue associated with these networks is the...
Provided by Reed Elsevier
-
White Papers
Optimization of Sequences in CDMA Systems: A Statistical - Mechanics Approach
Oct 2009
A statistical-mechanics approach is useful not only in analyzing the macroscopic system performance of wireless communication systems, but also in discussing design problems of wireless...
Provided by Reed Elsevier
-
White Papers
Performance Analysis of Asynchronous MC-CDMA Long Sequences for PLC Systems With Impulsive Noise
Oct 2009
In this paper, the performance of two asynchronous multi-access MC-CDMA systems with binary and complex valued long sequences is compared. An indoor multipath powerline network is used under...
Provided by Ciudad Universitaria
-
White Papers
A Multi-Levelled OFDM-CDMA Modem Using Complete Complementary Codes
Aug 2011
In this paper, the authors introduce a novel multiple access scheme based on a combination of a multi-levelled modem and multi-carrier techniques with the use of complete complementary codes. This...
Provided by University of Pretoria
-
White Papers
Towards Gigabit DSL (GDSL): Design of a CC/MC-CDMA Modem
Sep 2007
With the introduction of VDSL2 and the implementation of Fibre-To-The-Curb (FTTC), the theoretical limit of DSL technology is pushed even further than currently known ADSL technology. Current...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
A Distributed-Request-Based CDMA CAC for DiffServ Multimedia Services in Wireless Cellular Mobile Networks
Oct 2010
In this paper, a distributed-request-based CDMA DiffServ (Differentiated Service) Call Admission Control (CAC) scheme is proposed to provide various multimedia services seamlessly in wireless...
Provided by Reed Elsevier
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White Papers
CAC Schemes for Capacity Enhancement in WCDMA Systems
Oct 2011
To support multiple Service class of different data transmission rate for multimedia application in wireless systems. WCDMA involves Orthogonal Variable Spreading Factor (OVSF) code technique....
Provided by International Journal of Computer Science and Management Studies
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White Papers
Analysis of Power Control for Indoor Optical Wireless Code-Division Multiple Access Networks Using on-Off Keying and Binary Pulse Position Modulation
Feb 2010
Wireless infrared Optical Code-Division Multiple Access (W-OCDMA) is a new developing technique with many useful applications. Noting the limitation on power consumption and eye-safety...
Provided by Institution of Engineering and Technology
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White Papers
Algorithms for Improved Network Lifetime of Cooperative Autonomous Mobile Robotic Systems
Oct 2010
The authors present energy-efficient algorithms for Cooperative Autonomous Mobile Robotic Systems (CAMoRoS) to increase the network lifetime. They present Weighted TRaffic Adaptive Medium Access...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
A Game-Theoretic Approach to Joint Modulation, Rate and Power Control for Cognitive CDMA Communications
Feb 2011
A game-theoretic framework was used to study the effect of modulation on the energy efficiency of cognitive CDMA (Code Division Multiple Access) communications for adaptive modulation. The authors...
Provided by National University of Defense Technology
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White Papers
A Digital Rights Management Solution of TD-SCDMA Library Service
Oct 2011
As the prosperity of digital content in the Internet and the development of mobile computing, portable devices have become increasingly powerful and widely used in daily life. Online digital...
Provided by Nankai University
-
White Papers
An Evolutionary MAC Protocol Based on FPRP for Decreasing Delay
Dec 2010
Five-Phase Reservation Protocol (FPRP) is a single channel, Time Division Multiplex Access (TDMA) based broadcast scheduling protocol for Ad Hoc network. A modified Medium Access Control (MAC)...
Provided by Xiamen University
-
White Papers
Mobile User Objective System (MUOS) to Legacy UHF Gateway Component(MLGC)
Oct 2010
The Mobile User Objective System (MUOS) is the next generation Department of Defense (DoD) Ultra High Frequency (UHF) SATellite COMmunications (SATCOM) system that will provide the War-fighter...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Unclassified DSN Capability for MUOS Users
Oct 2010
The Mobile User Objective System (MUOS) is the next generation Department of Defense (DoD) Ultra High Frequency (UHF) SATellite COMmunications (SATCOM) system that will provide the war-fighter...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Soft-TDMAC: Software TDMA-Based MAC Over Commodity 802.11 Hardware
Jan 2009
The authors design and implement Soft-TDMAC, a software Time Division Multiple Access (TDMA) based MAC protocol, running over commodity 802.11 hardware. Soft-TDMAC has a synchronization mechanism,...
Provided by University of California
-
White Papers
Carrier Frequency Offset Estimation Using Hidden Pilots for MC-DS-CDMA Systems
Nov 2008
This paper develops a new hidden pilots based algorithm for the Carrier Frequency Offset (CFO) estimation of Multi-Carrier DS-CDMA (MC-DS-CDMA) systems. Multiple CFO of different users in the...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Orthogonal Signals With Jointly Balanced Spectra: Application to CDMA Transmissions
Feb 2012
This paper presents a technique for generating orthogonal bases of signals with jointly optimized spectra, in the sense that they are made as close as possible. To this end, the authors propose a...
Provided by Springer
-
White Papers
Novel Low-PAPR Parallel FSOK Transceiver Design for MC-CDMA System Over Multipath Fading Channels
Nov 2011
A low Peak-to-Average Power Ratio (PAPR) transceiver using a new parallel Frequency-Shift Orthogonal Keying (FSOK) technique is proposed for the multiuser uplink Multi-Carrier CDMA (MC-CDMA)...
Provided by Springer
-
White Papers
Frequency Domain Equalization Space-Time Block-Coded CDMA Transmission System
Sep 2011
In this paper, the authors propose a Space-Time Block-Coded (STBF) CDMA transmission system suitable for use with Frequency Domain Equalization (FDE) algorithms. They illustrate the FDE by...
Provided by Springer
-
White Papers
Polarization Division Multiple Access With Polarization Modulation for LOS Wireless Communications
Sep 2011
In this paper, the authors discuss a potential multiple access and modulation scheme based on Polarized States (PS) of ElectroMagnetic (EM) waves for Line-Of-Sight (LOS) communications. The...
Provided by Springer
-
White Papers
A Review on Synchronous CDMA Systems: Optimum Overloaded Codes, Channel Capacity, and Power Control
Sep 2011
This paper is a review on important issues related to Code-Division Multiple-Access (CDMA) systems such as channel capacity, power control, and optimum codes; specifically, the authors consider...
Provided by Springer
-
White Papers
The Promise of Downlink MU-MIMO for Highcapacity Next Generation Mobile Broadband Networks Based on IEEE 802.16 M
Sep 2011
The dramatic increase of the demand for mobile broadband services poses stringent requirements on the performance evolution of currently deployed mobile broadband networks, such as Mobile WiMAX...
Provided by Springer
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White Papers
Evaluation of a TDMA-Based Energy Efficient MAC Protocol for Multiple Capsule Networks
Sep 2011
Wireless capsule endoscopy is a new kind of medical device, which monitors the gastrointestinal tract of the human body. It can be envisaged that in the future more than one capsule could be...
Provided by Springer
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White Papers
Coherence Time-Based Cooperative MAC Protocol for Wireless Ad Hoc Networks
Jun 2011
In this paper, the authors address the goal of achieving performance gains under heavy-load and fast fading conditions. CoopMACI protocol proposed in Proceedings of the IEEE International...
Provided by Springer
-
White Papers
Cross-Layer Optimization for Multimedia Transport Over Multicode CDMA Networks
Jun 2011
Most previous work on Code Division Multiple Access (CDMA) considers the Bit Error Ratio (BER) at the physical layer and the Frame Drop Ratio (FDR) at the medium access control layer separately....
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
CROMA - A Slotted Mac Protocol for MANETs with Multislot Communications
Jan 2011
TDMA based MAC protocols can provide a very good utilization of the shared radio resources, especially at high input loads, in synchronized Mobile Ad hoc NETworks (MANETs). Global positioning...
Provided by Universite Pierre et Marie Curie
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White Papers
Spatial Outage Probability for Cellular Networks
Jul 2007
In this paper, the authors propose a new framework for the study of cellular networks called the fluid model and they derive from these model analytical formulas for interference, outage...
Provided by Telecom ParisTech
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White Papers
On the Impact of Mobility on Outage Probability in Cellular Networks
Dec 2008
In this paper, the authors develop an analytical study of the mobility in cellular networks and its impact on quality of service and outage probability. They first express analytically the...
Provided by Telecom ParisTech
-
White Papers
How to Set the Fractional Power Control Compensation Factor in LTE?
Apr 2011
The uplink power control procedure in Long Term Evolution (LTE) cellular networks is made of an open-loop part and a closed loop part. In this paper, the authors focus on the former and study the...
Provided by Telecom ParisTech
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White Papers
Analytical Performance Evaluation of Various Frequency Reuse and Scheduling Schemes in Cellular OFDMA Networks
May 2009
In this paper, the authors present an analytical solution to carry out performance analysis of various frequency reuse schemes in an OFDMA based cellular network. They study the performance in...
Provided by Telecom ParisTech
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White Papers
Distributed Fault Tolerance for WSNs With Routing Tree Overlays
Apr 2011
WSNs are inherently power constrained and are often deployed in harsh environments. As such, node death is a possibility that must be considered while designing protocols for such networks....
Provided by Institute of Electrical and Electronics Engineers
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White Papers
A Dynamic Clustering Construction for Wireless Sensor Networks
Feb 2011
Research in sensor networks has focused on development of energy efficient and secure infrastructures. In this paper, the authors introduce a new approach to organize sensor networks in clusters...
Provided by Universite de Franche-Compte
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White Papers
Bottleneck Analysis for Routing and Call Scheduling in Multi-Hop Wireless Networks
Mar 2009
In this paper, the authors address the routing and call scheduling problem in which one has to find a minimum-length schedule of selected links in a TDMA (Time Division Multiple Access) based...
Provided by INRIA
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White Papers
Effect of Channel-Quality Indicator Delay on HSDPA Performance
Jan 2009
This paper evaluates the effect of the channel estimation inaccuracy on the performance of an HSDPA system. This study provides some results from system level simulations that have been conducted...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Study of Rate Assignment on the Downlink of WCDMA
Dec 2010
In the paper, firstly the authors can know the power control is one of the most important technologies of radio resource management in WCDMA system, secondly the base principle of the outer loop...
Provided by Academy Publisher
-
White Papers
Distributed Parafac Based DS-CDMA Blind Receiver for Wireless Sensor Networks
May 2010
In this paper, the authors consider a collaborative scheme in wireless sensor networks where the multiple access protocol is a DS-CDMA one. When the receiver is equipped with an antenna array, it...
Provided by Universidade Federal do Ceara
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White Papers
Cross Layer Routing for Multihop Cellular Networks
Dec 2008
The authors propose a unified cross layer routing protocol with multiple constraints for CDMA Multihop Cellular Networks (MCNs). Multiple constraints are imposed on intermediate relay node...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Joint Scheduling, Power Control and Routing in Symmetric, One-dimensional, Multi-Hop Wireless Networks
Mar 2010
The authors are interested in finding a jointly optimal scheduling, routing and power control that achieves max-min fair rate allocation in a multi-hop wireless network. This is a highly complex...
Provided by EPFL
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White Papers
Joint TDMA/CSMA Scheduling for Solving the Bottleneck Issue in Wireless Mesh Networks
Nov 2010
The authors consider a multi-hop wireless mesh network composed by routers which route traffic to the Internet through several gateways. In such network, a bottleneck phenomenon limits the...
Provided by INRIA
-
White Papers
Evaluating TDMA-Based QoS Routing Protocols for Mobile Ad Hoc Networks
Jan 2010
To achieve QoS, the TDMA-based QoS routing protocols have to guarantee affordable bandwidth in a multi-hop environment. Furthermore, the scale of networks (the number of mobile nodes) and the...
Provided by Vanung University
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White Papers
Performance Evaluation of CDMA Packet Networks in Nakagami Fading
Sep 2010
This paper concerns the performance evaluation of band-limited Code-Division Multiple-Access (CDMA) packet networks over Nakagami fading channels. New equations for packet success probabilities...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Enhancing the Data Collection Rate of Tree-Based Aggregation in Wireless Sensor Networks
Apr 2009
What is the fastest rate at which one can collect a stream of aggregated data from a set of wireless sensors organized as a tree? The authors explore a hierarchy of techniques using realistic...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Optimal Spatial Reuse in Poisson Multi-Hop Networks
Jul 2010
The authors consider a wireless multi-hop network with sources that are Poisson distributed and relays which are placed on the source-destination line. Given a combined TDMA/ALOHA MAC protocol,...
Provided by University of Notre Dame
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White Papers
Exploring the Design Space of Greedy Link Scheduling Algorithms for Wireless Multihop Networks
Apr 2011
It is known that using a Spatial TDMA (STDMA) access scheme can increase the capacity of a wireless network over CSMA/CD access scheme. Modern wireless devices are capable of transmitting at...
Provided by Georgia Institute of Technology
-
White Papers
Adaptive Optimization of an Iterative Multiuser Detector for Turbo-Coded CDMA
Jan 2009
EXtrinsic Information Transfer (EXIT) charts are utilized to optimize the iterative multiuser detector receiver in a multiuser turbo-coded CDMA system. The (receive) power levels are optimized for...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
On Uplink Interference Scenarios in Two-Tier Macro and Femto Co-Existing UMTS Networks
Mar 2010
In this paper, a two-tier UMTS network is considered where a large number of randomly deployed Wideband Code Division Multiple Access (WCDMA) femtocells are laid under macrocells where the...
Provided by Australian National University
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White Papers
Energy-Efficient Retransmission Strategies Under Variable TDMA Scheduling in Body Area Networks
Jul 2011
The authors consider a 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. Their...
Provided by NICTA
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White Papers
Reconfigurable Optimized WCDMA DDC for Software Defined Radios
Jan 2011
In this paper an optimized approach is presented to design & implement WCDMA based digital down converter for software defined radios. The proposed DDC is designed using Park McClellan algorithm...
Provided by Cyber Journals
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White Papers
Recursive Analysis for Soft Handoff Schemes in CDMA Cellular Systems
Oct 2008
In this paper, the authors study the performance of the call admission control for a CDMA based cellular system. They describe the soft handoff procedure and the cellular geometry in CDMA system...
Provided by Shanghai Jiao Tong University
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White Papers
Space-Time Diversity-Enhanced QoS Provisioning for Real-Time Service Over MC-DS-CDMA Based Wireless Networks
Jun 2007
In order to support the Quality-of-Service (QoS) requirements for real-time traffic over broadband wireless networks, advanced techniques such as Space-Time Diversity (STD) and MultiCarrier...
Provided by John Wiley & Sons
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White Papers
Battery-Dynamics Driven TDMA MAC Protocols for Wireless Body-Area Monitoring Networks in Healthcare Applications
May 2009
The authors propose the cross-layer based battery-aware Time Division Multiple Access (TDMA) Medium Access Control (MAC) protocols for wireless body-area monitoring networks in wireless healthcare...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Minimum Length Scheduling in Single-Hop Multiple Access Wireless Networks
Sep 2009
In this paper, the authors address the minimum length scheduling problem in wireless networks, where each transmitter has a finite amount of data to deliver to a common receiver node (e.g., base...
Provided by University of New Mexico
-
White Papers
Distributed Cross-Layer Coordination of Congestion Control and Resource Allocation in S-TDMA Wireless Networks
Jul 2007
The authors consider the problem of joint congestion control and resource allocation in spatial-TDMA wireless networks. The design problem is posed as a utility maximization problem subject to...
Provided by Springer Science+Business Media
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White Papers
Bounded-Degree Minimum-Radius Spanning Trees for Fast Data Collection in Sensor Networks
Feb 2010
In sensor networks that require fast and timely collection of aggregated data to a common sink over a tree-based routing topology, the authors define aggregated sink throughput as the inverse of...
Provided by Bogazici University
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Whitepapers
Fast Data Collection in Tree-Based Wireless Sensor Networks
Jan 2011
The authors investigate the following fundamental question - how fast can information be collected from a wireless sensor network organized as tree? To address this, they explore and evaluate a...
Provided by Bogazici University
-
White Papers
Multi-Channel Scheduling and Spanning Trees: Throughput-Delay Trade-Off for Fast Data Collection in Sensor Networks
Dec 2010
The authors investigate the trade-off between two mutually conflicting performance objectives - throughput and delay - for fast, periodic data collection in tree-based sensor networks arbitrarily...
Provided by University of Southern California
-
White Papers
Multi-Channel Scheduling Algorithms for Fast Aggregated Convergecast in Sensor Networks
May 2009
Fast and periodic collection of aggregated data is of considerable interest for mission-critical and continuous monitoring applications in sensor networks. In the many-to-one communication...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Minimal Time and Conflict-Free Schedule for Convergecast in Wireless Sensor Networks
Sep 2008
A Time Division Multiple Access (TDMA) scheduling technique, which solves collision problem and collects a complete data efficiently, is adopted to assign communication mission into the available...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
Minimizing Interference in TDMA MAC Protocols for WSN Operating in Shadow-Fading Channels
Jan 2008
This paper presents an analysis of the impact of shadow fading on the performance of TDMA slot allocation, with latter being measured in terms of the resultant in-network interference versus...
Provided by INESC-ID
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White Papers
A Low Complexity Transmitter Structure for OFDM-FDMA Uplink Systems
Jan 2011
The Orthogonal Frequency Division Multiplex (OFDM) transmission technique can efficiently deal with the effects of multi-path propagation in the broadband radio channel. It also has a high system...
Provided by Hamburg University of Technology
-
White Papers
A Hexagonal-Tree TDMA-Based QoS Multicasting Protocol for Wireless Mobile Ad Hoc Networks
Sep 2007
The mobile multimedia applications have recently generated much interest in wireless ad hoc networks with supporting the Quality-of-Service (QoS) communications. The QoS metric considered in this...
Provided by Springer Science+Business Media
-
White Papers
An Interference Aware Distributed Resource Management Scheme for CDMA-Based Wireless Mesh Backbone
Dec 2007
In this paper, with a cross-layer design principle, the authors propose an interference aware distributed resource management scheme for a Code-Division Multiple Access (CDMA)-based wireless mesh...
Provided by Institute of Electrical and Electronics Engineers
-
White Papers
MAC-Layer Active Dropping for Real-Time Video Streaming in IEEE 802.16 Networks
Mar 2010
This paper introduces a MAC-layer Active Dropping (AD) scheme for achieving effective resource utilization and maintaining application-level quality of services in real-time video streaming over...
Provided by University of Waterloo
-
White Papers
Capacity Estimation of Multi-Service Cellular Network
Mar 2011
Planning and dimensioning process of a multi-service network WCDMA should consider the whole parameters characterising the radio cell. Among these, the authors are interested in the required total...
Provided by Université Abdelmalek Essadi
-
White Papers
A New Soft Handover Mechanism Using DCHs in 3GPP HSDPA Networks
May 2009
In 3GPP (Third Generation Partnership Project) Release 5 (R5), HSDPA (High-Speed Downlink Packet Access) has been standardized to enhance the data rate of downlink packet transmission on top of...
Provided by Academy Publisher
-
White Papers
Development of Efficient Query Processor in Cell Phone for Sensor Data Processing Over a WSN
May 2011
A query processor is designed for query-based multiple vital signs monitoring system to query sensor network and collect data. This monitoring system performs a local vital signs data analysis...
Provided by International Association of Computer Science & Information Technology (IACSIT)
-
White Papers
An Adaptive IEEE 802.15.4a TH-TDMA UWB Industrial Field Level Network
Jul 2010
The authors introduce the deployment of IEEE 802.15.4a in industrial field level communication, which is unexplored so far. Impulse Radio-Time Hopping Ultra Wide Band (IR-TH UWB) physical layer is...
Provided by Academy Publisher
-
White Papers
A Low-Complexity Optimum Multiuser Receiver for DS-CDMA Wireless Systems
Jun 2010
Multiuser detection is an important technology in wireless CDMA systems for improving both data rate as well as user capacity. However, the computational complexity of multiuser detection prevents...
Provided by Academy Publisher
-
White Papers
Performance Analysis of Power Line Communication Using DS-CDMA Technique With Adaptive Laguerre Filters
Jan 2012
This paper presents the system performance of the Power Line Communication (PLC) using Direct-Sequence Code Division Multiple Access (DS-CDMA) technique with an adaptive equalizer based on...
Provided by International Association of Computer Science & Information Technology (IACSIT)
-
White Papers
Performance Analysis of Parallel Interference Cancellation in Cyclic-Prefix CDMA
Jan 2012
Code Division Multiple Access with Cyclic Prefix (CP-CDMA) is regarded as one of the best candidates for the broadband wireless communication system. This paper proposes a Parallel Interference...
Provided by International Association of Computer Science & Information Technology (IACSIT)
-
White Papers
Multiband Digital Filter Design for WCDMA Systems
Jan 2012
This paper introduces structure characteristics, the basic principles of the Finite Impulse Response (FIR) digital filter, and design methods based on MATLAB simulation. FDATool in MATLAB is used...
Provided by International Association of Computer Science & Information Technology (IACSIT)
-
White Papers
Implementation of Self Interference Cancellation for WCDMA Repeater
Jan 2012
In this paper, the FPGA (Field Programmable Gate Array) implementation of self interference cancellation technique based on an adaptive LMS (Least Mean Square) algorithm is presented. By using the...
Provided by International Association of Computer Science & Information Technology (IACSIT)
-
White Papers
Design and Implementation of Instant Messaging System Based on CDMA Network
Jan 2012
Instant messaging is a basic wireless service of mobile network. The system on the basis of DTU, sends the collected data by short message to supervision center, so the system can carry out...
Provided by International Association of Computer Science & Information Technology (IACSIT)
-
White Papers
SAFNAQ, an Algorithm for Transmission Power Allocation in MCCDMA
Jan 2012
A power allocation algorithm for MC-CDMA communication systems is proposed. There are many algorithms of power allocation in MC-CDMA, e.g., Frequency Domain Power allocation Algorithm (FDPA), Time...
Provided by International Association of Computer Science & Information Technology (IACSIT)
-
White Papers
Network Structure and Capability Leveraging: Lesson From China's TD-SCDMA Industry Alliance
Jan 2012
After the acknowledgement of Time Division Synchronous Code Division Multiple Access (TD-SCDMA) international standard, China's TD-SCDMA industry alliance experiences high-speed development. As a...
Provided by International Association of Computer Science & Information Technology (IACSIT)
-
White Papers
A Theoretical Prediction of Users in WCDMA Interference
Jan 2011
The major problem that the authors are faced too in wireless systems is the interference. This problem contributes in limiting the performance of cellular networks. In 3G, Wide Code Division...
Provided by Journal of Theoretical and Applied Information Technology
-
White Papers
Newton Iteration Acceleration of the Nash Game Algorithm for Power Control in 3G Wireless CDMA Networks
Jan 2012
In wireless communication systems, each user's signal contributes to the interference seen by the other users. Given limited available battery power, this creates a need for effective and...
Provided by Rutgers University
-
White Papers
SIR-Based Power Control Algorithms for Wireless CDMA Networks: An Overview
Jan 2012
This paper summarizes and explains the main results on Signal to Interference Ratio (SIR) based power control algorithms, which are used to increase capacity and improve quality of service in...
Provided by Rutgers University
-
White Papers
Maximum Likelihood Binary Detection in Improper Complex Gaussian Noise
Oct 2007
In a wide range of communication systems, including DS-CDMA and OFDM systems, the signal-of-interest might be corrupted by an improper (also called non-circularly symmetric) interfering signal....
Provided by University of Toronto
-
White Papers
Randomized Data-Gathering Protocol for Time-Driven Sensor Networks
Aug 2011
Proactive or time-driven sensor networks are devoted to the continuous reporting of environmental data to a sink or base station. An important issue associated with these networks is the...
Provided by Reed Elsevier
-
White Papers
Optimization of Sequences in CDMA Systems: A Statistical - Mechanics Approach
Oct 2009
A statistical-mechanics approach is useful not only in analyzing the macroscopic system performance of wireless communication systems, but also in discussing design problems of wireless...
Provided by Reed Elsevier
-
White Papers
Performance Analysis of Asynchronous MC-CDMA Long Sequences for PLC Systems With Impulsive Noise
Oct 2009
In this paper, the performance of two asynchronous multi-access MC-CDMA systems with binary and complex valued long sequences is compared. An indoor multipath powerline network is used under...
Provided by Ciudad Universitaria
-
White Papers
A Multi-Levelled OFDM-CDMA Modem Using Complete Complementary Codes
Aug 2011
In this paper, the authors introduce a novel multiple access scheme based on a combination of a multi-levelled modem and multi-carrier techniques with the use of complete complementary codes. This...
Provided by University of Pretoria
-
White Papers
Towards Gigabit DSL (GDSL): Design of a CC/MC-CDMA Modem
Sep 2007
With the introduction of VDSL2 and the implementation of Fibre-To-The-Curb (FTTC), the theoretical limit of DSL technology is pushed even further than currently known ADSL technology. Current...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
A Distributed-Request-Based CDMA CAC for DiffServ Multimedia Services in Wireless Cellular Mobile Networks
Oct 2010
In this paper, a distributed-request-based CDMA DiffServ (Differentiated Service) Call Admission Control (CAC) scheme is proposed to provide various multimedia services seamlessly in wireless...
Provided by Reed Elsevier
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White Papers
CAC Schemes for Capacity Enhancement in WCDMA Systems
Oct 2011
To support multiple Service class of different data transmission rate for multimedia application in wireless systems. WCDMA involves Orthogonal Variable Spreading Factor (OVSF) code technique....
Provided by International Journal of Computer Science and Management Studies
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White Papers
Analysis of Power Control for Indoor Optical Wireless Code-Division Multiple Access Networks Using on-Off Keying and Binary Pulse Position Modulation
Feb 2010
Wireless infrared Optical Code-Division Multiple Access (W-OCDMA) is a new developing technique with many useful applications. Noting the limitation on power consumption and eye-safety...
Provided by Institution of Engineering and Technology
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White Papers
Algorithms for Improved Network Lifetime of Cooperative Autonomous Mobile Robotic Systems
Oct 2010
The authors present energy-efficient algorithms for Cooperative Autonomous Mobile Robotic Systems (CAMoRoS) to increase the network lifetime. They present Weighted TRaffic Adaptive Medium Access...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
A Game-Theoretic Approach to Joint Modulation, Rate and Power Control for Cognitive CDMA Communications
Feb 2011
A game-theoretic framework was used to study the effect of modulation on the energy efficiency of cognitive CDMA (Code Division Multiple Access) communications for adaptive modulation. The authors...
Provided by National University of Defense Technology
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White Papers
A Digital Rights Management Solution of TD-SCDMA Library Service
Oct 2011
As the prosperity of digital content in the Internet and the development of mobile computing, portable devices have become increasingly powerful and widely used in daily life. Online digital...
Provided by Nankai University
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White Papers
An Evolutionary MAC Protocol Based on FPRP for Decreasing Delay
Dec 2010
Five-Phase Reservation Protocol (FPRP) is a single channel, Time Division Multiplex Access (TDMA) based broadcast scheduling protocol for Ad Hoc network. A modified Medium Access Control (MAC)...
Provided by Xiamen University
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White Papers
Mobile User Objective System (MUOS) to Legacy UHF Gateway Component(MLGC)
Oct 2010
The Mobile User Objective System (MUOS) is the next generation Department of Defense (DoD) Ultra High Frequency (UHF) SATellite COMmunications (SATCOM) system that will provide the War-fighter...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Unclassified DSN Capability for MUOS Users
Oct 2010
The Mobile User Objective System (MUOS) is the next generation Department of Defense (DoD) Ultra High Frequency (UHF) SATellite COMmunications (SATCOM) system that will provide the war-fighter...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Soft-TDMAC: Software TDMA-Based MAC Over Commodity 802.11 Hardware
Jan 2009
The authors design and implement Soft-TDMAC, a software Time Division Multiple Access (TDMA) based MAC protocol, running over commodity 802.11 hardware. Soft-TDMAC has a synchronization mechanism,...
Provided by University of California
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White Papers
Carrier Frequency Offset Estimation Using Hidden Pilots for MC-DS-CDMA Systems
Nov 2008
This paper develops a new hidden pilots based algorithm for the Carrier Frequency Offset (CFO) estimation of Multi-Carrier DS-CDMA (MC-DS-CDMA) systems. Multiple CFO of different users in the...
Provided by Institute of Electrical and Electronics Engineers
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White Papers
Orthogonal Signals With Jointly Balanced Spectra: Application to CDMA Transmissions
Feb 2012
This paper presents a technique for generating orthogonal bases of signals with jointly optimized spectra, in the sense that they are made as close as possible. To this end, the authors propose a...
Provided by Springer
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White Papers
Novel Low-PAPR Parallel FSOK Transceiver Design for MC-CDMA System Over Multipath Fading Channels
Nov 2011
A low Peak-to-Average Power Ratio (PAPR) transceiver using a new parallel Frequency-Shift Orthogonal Keying (FSOK) technique is proposed for the multiuser uplink Multi-Carrier CDMA (MC-CDMA)...
Provided by Springer
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White Papers
Frequency Domain Equalization Space-Time Block-Coded CDMA Transmission System
Sep 2011
In this paper, the authors propose a Space-Time Block-Coded (STBF) CDMA transmission system suitable for use with Frequency Domain Equalization (FDE) algorithms. They illustrate the FDE by...
Provided by Springer
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White Papers
Polarization Division Multiple Access With Polarization Modulation for LOS Wireless Communications
Sep 2011
In this paper, the authors discuss a potential multiple access and modulation scheme based on Polarized States (PS) of ElectroMagnetic (EM) waves for Line-Of-Sight (LOS) communications. The...
Provided by Springer
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White Papers
A Review on Synchronous CDMA Systems: Optimum Overloaded Codes, Channel Capacity, and Power Control
Sep 2011
This paper is a review on important issues related to Code-Division Multiple-Access (CDMA) systems such as channel capacity, power control, and optimum codes; specifically, the authors consider...
Provided by Springer
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White Papers
The Promise of Downlink MU-MIMO for Highcapacity Next Generation Mobile Broadband Networks Based on IEEE 802.16 M
Sep 2011
The dramatic increase of the demand for mobile broadband services poses stringent requirements on the performance evolution of currently deployed mobile broadband networks, such as Mobile WiMAX...
Provided by Springer
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White Papers
Evaluation of a TDMA-Based Energy Efficient MAC Protocol for Multiple Capsule Networks
Sep 2011
Wireless capsule endoscopy is a new kind of medical device, which monitors the gastrointestinal tract of the human body. It can be envisaged that in the future more than one capsule could be...
Provided by Springer
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White Papers
Coherence Time-Based Cooperative MAC Protocol for Wireless Ad Hoc Networks
Jun 2011
In this paper, the authors address the goal of achieving performance gains under heavy-load and fast fading conditions. CoopMACI protocol proposed in Proceedings of the IEEE International...
Provided by Springer
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White Papers
Binary De Bruijn Sequences for DS-CDMA Systems: Analysis and Results
Jul 2011
Code Division Multiple Access (CDMA) using Direct Sequence (DS) spread spectrum modulation provides multiple access capability essentially thanks to the adoption of proper sequences as spreading...
Provided by Springer
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