Results 21 to 30 of about 5,600 (224)

Exploiting Opportunistic Multiuser Detection in Decentralized Multiuser MIMO Systems [PDF]

open access: yesGLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference, 2009
This paper studies the design of a decentralized multiuser multi-antenna (MIMO) system for spectrum sharing over a fixed narrow band, where the coexisting users independently update their transmit covariance matrices for individual transmit-rate maximization via an iterative manner.
Rui Zhang 0006, John M. Cioffi
openaire   +3 more sources

Receiver Multiuser Diversity Aided Multi-Stage MMSE Multiuser Detection for DS-CDMA and SDMA Systems Employing I-Q Modulation [PDF]

open access: yes, 2010
The so-called receiver multiuser diversity aided multistage minimum mean-square error multiuser detector (RMD/MS-MMSE MUD), which was proposed previously by the author, is investigated in the context of the direct-sequence code-division multiple-access ...
Yang, Lie-Liang, Lie-Liang Yang
core   +1 more source

Performance of the Space-Time Block Coded DS-CDMA Uplink Employing Soft-Output ACO-Aided Multiuser Space-Time Detection and Iterative Decoding [PDF]

open access: yes, 2010
In this treatise we propose a three-stage twin-transmit-antenna assisted MultiUser (MU) Direct Sequence Code-Division Multiple Access (DS-CDMA) system employing both a Unitary Rate Code (URC) and a Recursive Systematic Code (RSC) to carry out iterative ...
Yang, Lie-Liang   +9 more
core   +1 more source

Experimental Verification of a Multiuser Detection Technique for Asynchronous UOWC Systems

open access: yesIEEE Photonics Journal
In this paper, a multiuser detection technique is proposed and experimentally verified in underwater optical wireless communication (UOWC) under dynamic channel conditions, which incorporates subspace-based delay estimation and decorrelating multiuser ...
Weijie Liu   +3 more
doaj   +1 more source

SVD Aided Joint Transmitter and Receiver Design for the Uplink of Multiuser Detection Assisted MIMO Systems, [PDF]

open access: yes, 2008
A novel singular value decomposition (SVD) aided uplink (UL) multiuser MIMO system is proposed. In contrast to the traditional minimum mean square error (MMSE) or zeroforcing (ZF) multiuser detection (MUD) technique, the proposed method exploits the ...
W. Liu   +5 more
core   +1 more source

Low Complexity Receiver Structures for Space-Time Coded Multiple-Access Systems

open access: yesEURASIP Journal on Advances in Signal Processing, 2002
Multiuser detection for space-time coded synchronous multiple-access systems in the presence of independent Rayleigh fading is considered. Under the assumption of quasi-static fading, it is shown that optimal (full diversity achieving) space-time codes ...
Jayaweera Sudharman K, Poor H Vincent
doaj   +1 more source

Harmony search aided iterative channel estimation, multiuser detection and channel decoding for DS-CDMA [PDF]

open access: yes, 2010
A novel Multiuser Detection (MUD) scheme is proposed for DS-CDMA systems employing the so-called Harmony Search (HS) algorithm, which is a novel meta-heuristic optimisation method.
Rong Zhang   +3 more
core   +1 more source

On Energy-Efficient Hierarchical Cross-Layer Design: Joint Power Control and Routing for Ad Hoc Networks

open access: yesEURASIP Journal on Wireless Communications and Networking, 2007
A hierarchical cross-layer design approach is proposed to increase energy efficiency in ad hoc networks through joint adaptation of nodes' transmitting powers and route selection.
Cristina Comaniciu, H. Vincent Poor
doaj   +2 more sources

Improved MAX-Log MPA multiuser detection algorithm in SCMA system

open access: yesDianzi Jishu Yingyong, 2018
Sparse code multiple access(SCMA) is a novel non-orthogonal multiple access scheme to face the future 5G communication. In allusion to the problem that sparse code multiple access(SCMA) system based on a logarithm-domain MAX-Log message passing algorithm(
Wu Xiong   +3 more
doaj   +1 more source

Ant-Colony Based Near-ML Space-Time Multiuser Detection for the STBC Assisted DS-CDMA Uplink [PDF]

open access: yes, 2010
In this contribution, a novel Ant Colony Optimization (ACO) based Space-Time (ST) Multiuser Detection (MUD) algorithm was proposed in order to improve the Bit Error Ratio (BER) versus Signal-to-Noise Ratio (SNR) performance achieved by the Space-Time ...
Yang, Lie-Liang   +5 more
core   +1 more source

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