DocumentCode :
3111284
Title :
Robust CDMA signal detection in the presence of user and interference signature mismatch
Author :
Cui, Shuguang ; Luo, Zhi-Quan ; Ding, Zhi
Author_Institution :
Dept. of Electr. & Comput. Eng., McMaster Univ., Hamilton, Ont., Canada
fYear :
2001
fDate :
2001
Firstpage :
221
Lastpage :
224
Abstract :
Signal detection in multiuser CDMA systems is particularly attractive when the desired user signature and some interferer signatures are known and are not completely orthogonal at the receiver. As many multiuser systems must deal with the near-far problem, a weakness common to several known blind multiuser CDMA detectors is that the detection performance is very sensitive to signature waveform mismatch (SWM) which occurs a result of channel distortion. We consider the design of a partially blind multiuser CDMA detector that is robust to the SWM. We present a convex formulation of this problem by using second-order cone programming (SOCP). The resulting SOCP can be solved efficiently using the recently developed interior point methods. Computer simulations indicate that the performance of our new robust multiuser detector is superior to the one that does not utilize the interference information
Keywords :
code division multiple access; convex programming; multiuser channels; signal detection; CDMA; channel distortion; convex formulation; interior point methods; multiuser systems; near-far problem; partially blind multiuser detector; performance; robust signal detection; second-order cone programming; signal detection; signature waveform mismatch; user interference signature mismatch; Computational Intelligence Society; Computer simulation; Detectors; Matched filters; Multiaccess communication; Multiple access interference; Multiuser detection; Robustness; Signal detection; Timing;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Wireless Communications, 2001. (SPAWC '01). 2001 IEEE Third Workshop on Signal Processing Advances in
Conference_Location :
Taiwan
Print_ISBN :
0-7803-6720-0
Type :
conf
DOI :
10.1109/SPAWC.2001.923887
Filename :
923887
Link To Document :
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