Record Details

Minimum joint probability of error based adaptive multiuser detection for multipath DS-CDMA channels

DSpace at IIT Bombay

View Archive Info
 
 
Field Value
 
Title Minimum joint probability of error based adaptive multiuser detection for multipath DS-CDMA channels
 
Creator DUA, ADITYA
DESAI, UB
MALLIK, RK
 
Subject channel capacity
computational complexity
probability
signal processing
 
Description DS-CDMA is a popular multiple access technology for wireless communications. However, its performance is limited by multiple access interference and multipath distortion. Multiuser detection and space time processing are two signal processing techniques employed to improve the performance of DS-CDMA. We propose a blind adaptive space-time multiuser detection algorithm in this paper, based on the criterion of minimum joint probability of error (MJPOE). The optimal filter weights are computed adaptively using a gradient descent approach. The algorithm is blind and offers a BER performance better than the non-adaptive MMSE algorithm, at the cost of higher computational complexity. An approach for reducing the computational overheads of MJPOE using Gram-Schmidt orthogonalization is suggested. The convergence rate of MJPOE is much faster than earlier known adaptive implementations of the MMSE detector, viz. LMS and RLS. Simulation results are presented for asynchronous multipath channels, with multiple antennas employed at the receiver.
 
Publisher IEEE
 
Date 2008-12-15T10:55:37Z
2011-11-27T14:23:30Z
2011-12-15T09:57:32Z
2008-12-15T10:55:37Z
2011-11-27T14:23:30Z
2011-12-15T09:57:32Z
2003
 
Type Article
 
Identifier Proceedings of the 57th IEEE Semiannual Vehicular Technology Conference VTC 2003-Spring (V 4), Jeju, Korea, 22-25 April 2003, 2394-2398
0-7803-7757-5
10.1109/VETECS.2003.1208819
http://hdl.handle.net/10054/333
http://dspace.library.iitb.ac.in/xmlui/handle/10054/333
 
Language en