Title :
Performance of space-time MMSE adaptive receivers in DS-CDMA systems using FEC coding in flat fast-fading channels
Author :
Hamouda, Walaa A. ; McLane, Peter J.
Author_Institution :
Dept. of Electr. & Comput. Eng., Queen´´s Univ., Canada
Abstract :
This paper investigates the use of soft-decision convolutional coding (SD-CC) in a space-time MMSE adaptive receiver over single-path flat fast-fading channels. Both the normalized least-mean square (NLMS) and the recursive-least square (RLS) algorithms are used. The significant performance improvement of the RLS algorithm over the NLMS is evident in our analysis. We also employ error bounds developed earlier for the coded multiuser-type receiver and show their validity when a suitable channel interleaver is used for the space-time adaptive case. Then, we use these bounds to estimate the improvement in system user capacity that accrues due to error-control coding. It is found that the coded system offers as much as 225% gain in user capacity for the fading channel.
Keywords :
channel coding; code division multiple access; convolutional codes; error statistics; fading channels; forward error correction; least mean squares methods; radio receivers; spread spectrum communication; DS-CDMA systems; FEC coding; NLMS algorithm; RLS algorithm; SD-CC; coded multiuser-type receiver; error bounds; error-control coding; flat fast-fading channels; normalized least-mean square algorithm; recursive-least square algorithm; single-path flat fast fading channels; soft decision convolutional coding; space-time MMSE adaptive receivers; user capacity; Adaptive signal detection; Algorithm design and analysis; Detectors; Finite impulse response filter; Forward error correction; Multiaccess communication; Resonance light scattering; Signal processing; Signal processing algorithms; System performance;
Conference_Titel :
Vehicular Technology Conference, 2002. Proceedings. VTC 2002-Fall. 2002 IEEE 56th
Print_ISBN :
0-7803-7467-3
DOI :
10.1109/VETECF.2002.1040784