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Performance of convolutional and RS codes in DS-CDMA systems using space-time MMSE multiuser detection

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2 Author(s)
Hamouda, W.A. ; Dept. of Electr. & Comput. Eng., Queen''s Univ., Kingston, Ont., Canada ; McLane, Peter J.

In this paper we investigate the performance of a minimum mean square error (MMSE) multi-user detector (MUD) using antenna array processing and forward error correction channel codes (FEC) in a synchronous direct-sequence code-division multiple access (DS-CDMA) system over both additive white Gaussian noise (AWGN) and flat Rayleigh fading channels. Two different channel codes are considered in a binary phase shift-keyed (BPSK) modulation system; Reed-Solomon (RS) and convolutional codes. Through computer simulations, a comparison between the two codes shows that convolutional codes and soft decision decoding can offer at least 2 dB coding gain over the hard decision RS decoding in an AWGN channel and approximately a 5 dB gain in a flat fading channel at a BER of 10-4. In the paper, such results are compared with these in the text (Wicker 1995) for the single user case and AWGN channels

Published in:

Vehicular Technology Conference, 2001. VTC 2001 Fall. IEEE VTS 54th  (Volume:2 )

Date of Conference:

2001

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