Results 1 - 10 of 94

IEEE TRANSACTIONS ON COMMUNICATIONS (TO APPEAR) 1 Iterative Receiver Processing for OFDM Modulated Physical-Layer Network Coding in Underwater Acoustic Channels

by Zhaohui Wang, Student Member, Jie Huang, Shengli Zhou, Senior Member, Zhengdao Wang, Senior Member
"... Abstract—Physical-layer network coding (PLNC) allows two remote terminals to exchange information in two time slots via a half-duplex relay. In this paper, we consider PLNC in underwater acoustic (UWA) two-way relay networks, with particular attention on the recovery of the network-coded codeword at ..."
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Abstract—Physical-layer network coding (PLNC) allows two remote terminals to exchange information in two time slots via a half-duplex relay. In this paper, we consider PLNC in underwater acoustic (UWA) two-way relay networks, with particular attention on the recovery of the network-coded codeword

MIMO assisted space-code-division multiple-access: Linear detectors and performance over multipath fading channels

by Lie-liang Yang, Senior Member - IEEE J. on Select. Areas in Commun , 2006
"... Abstract—In this contribution, we propose and investigate a multiple-input–multiple-output space-division, code-division multiple-access (MIMO SCDMA) scheme. The main objective is to improve the capacity of the existing direct-sequence (DS)-CDMA systems, for example, for supporting an increased numb ..."
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Abstract—In this contribution, we propose and investigate a multiple-input–multiple-output space-division, code-division multiple-access (MIMO SCDMA) scheme. The main objective is to improve the capacity of the existing direct-sequence (DS)-CDMA systems, for example, for supporting an increased

A Chaotic Direct-Sequence Spread-Spectrum System for Underwater Communication

by S. Azou, G. Burel
"... Abstract-The recent advances in acoustic modem technology have enabled the development of Underwater Acoustic Networks (UAN). Application interests include oceanographic information gathering, environmental monitoring or coastal defense. Due to its ability of simultaneously sharing the same frequenc ..."
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frequency band for various users and the poor propagation conditions usually encountered in shallow water environment, the Code Division Multiple Access (CDMA) is a promising scheme for UAN. Recent results show that a standard CDMA direct-sequence spread spectrum approach is not sufficient to ensure Low

Diversity Added Adaptive-Fuzzy Logic Controlled Receivers for Direct Sequence Code Division Multiple Access System

by Mangala Ramrao Gajbhiye
"... Abstract — A new approach in adjusting a step size and a forgetting factor of the Least Mean Square (LMS) and Recursive Least Square (RLS) algorithms respectively using the fuzzy logic controlled technique is developed for Maximum Ratio Combining diversity added Multiuser Detection of Direct Sequenc ..."
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Sequence Code Division Multiple Access (DS-CDMA) system in multipath channels. DS-CDMA is a popular multiple-access technology for wireless communication. However its performance is limited by multiple-access interference (MAI) and multipath distortion. Adaptive techniques for detection of DS-CDMA signals

Special Issue: MIMO Systems and Applications

by Frederik Petré, Geert Leus, Luc Deneire, Marc Engels, Marc Moonen, Hugo De Man , 2002
"... To combat fading and achieve high performance over wireless channels, multi-antenna techniques, and more specifi-cally Space-Time Block Coding (STBC) techniques, enable multi-antenna diversity gains over Multiple-Input Multiple-Output (MIMO) channels. Besides, Direct-Sequence Code Division Multiple ..."
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To combat fading and achieve high performance over wireless channels, multi-antenna techniques, and more specifi-cally Space-Time Block Coding (STBC) techniques, enable multi-antenna diversity gains over Multiple-Input Multiple-Output (MIMO) channels. Besides, Direct-Sequence Code Division Multiple

CDMA-based Analog Network Coding through Interference Cancellation for Underwater Acoustic Sensor Networks

by Hovannes Kulh, Tommaso Melodia, Dimitrios Koutsonikolas
"... The performance of multi-hop underwater acoustic network is knowntobelimited bythelongpropagation delays andby the limited bandwidth of the underwater acoustic (UW-A) channel. Recent work on analog network coding (ANC) has shown that significant throughput gains can be achieved in multi-hop wireless ..."
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-hop wireless networks. However, implementing ANC for UW-A communications is very challenging as the UW-A channel is severely affected by multipath. In this paper, we propose CE-CDMA, a collision-enabling direct-sequence code-division multiple-access scheme for multi-hop underwater acoustic sensor networks (UW

TO CODE OR NOT TO CODE

by Présentée À La, Faculté Informatique, Et Communications, Section Des, Systèmes De Communication, Du Grade, De Docteur, Ès Sciences, Prof M. Vetterli, Prof B. Rimoldi, Prof R. Gallager, Prof A. Lapidoth, Prof J. Massey, Prof E. Telatar, Prof S. Verdú, Michael Gastpar, Amos Lapidoth, Jim Ma , 2002
"... de nationalité suisse et originaire de Zurich (ZH) et Lucerne (LU) acceptée sur proposition du jury: ..."
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de nationalité suisse et originaire de Zurich (ZH) et Lucerne (LU) acceptée sur proposition du jury:

permission. Structured Codes in Information Theory: MIMO and Network Applications

by Jiening Zhan, Jiening Zhan, Jiening Zhan, Jiening Zhan
"... All rights reserved. ..."
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All rights reserved.

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 4, NO. 6, NOVEMBER 2005 3095 Space--Time-Coded CDMA Uplink Transmission

by With Mui-Free Reception, K. C. B. Wavegedara, Student Member, Dejan V. Djonin, Vijay K. Bhargava
"... The problem of adopting space--time block coding (STBC) in the uplink of direct sequence code division multiple access (DS-CDMA) systems is addressed. A novel system architecture is proposed for space--time (ST)-coded uplink transmissions over multipath fading channels with multiple user interferenc ..."
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The problem of adopting space--time block coding (STBC) in the uplink of direct sequence code division multiple access (DS-CDMA) systems is addressed. A novel system architecture is proposed for space--time (ST)-coded uplink transmissions over multipath fading channels with multiple user

A new blind adaptive interference suppression scheme for acquisition and MMSE demodulation of DS/CDMA signals

by Ho-chi Hwang, Che-ho Wei - Vehicular Technology, IEEE Transactions on , 2000
"... Abstract—In this paper, we present an efficient blind algorithm for estimating the code timing of a desired user in an asynchronous direct-sequence code-division multiple-access (DS/CDMA) system over frequency-nonselective-fading channels. The proposed algo-rithm acquires the code timing explicitly ..."
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Abstract—In this paper, we present an efficient blind algorithm for estimating the code timing of a desired user in an asynchronous direct-sequence code-division multiple-access (DS/CDMA) system over frequency-nonselective-fading channels. The proposed algo-rithm acquires the code timing explicitly
Results 1 - 10 of 94