Title :
Blind adaptive distributed decorrelating detector for DS-CDMA systems
Author :
Yuan, Liu ; Zheng, Qin
Author_Institution :
Coll. of Electron. & Inf., Xi´´an Jiaotong Univ., China
Abstract :
A blind adaptive distributed decorrelating detector is proposed for DS-CDMA system in both additive white Gaussian noise and fading channels in. this paper. It combines spatial diversity and decorrelating detection. The performance of decorrelating detector do not depend on the other users´ energies and the other users´ fading characteristics. The blind adaptive diversity-combining scheme based on stochastic gradient techniques is formulated using optimal likelihood ratio testing criterion, and its performance is evaluated in numerical examples, and compared with that of the other combining schemes. The proposed method is suitable for real-time implementation and can provide a significant receiver performance and system capacity gain.
Keywords :
AWGN channels; adaptive signal detection; code division multiple access; decorrelation; diversity reception; fading channels; gradient methods; interference suppression; multiuser detection; radiofrequency interference; spread spectrum communication; stochastic processes; AWGN channel; DS-CDMA systems; additive white Gaussian noise channel; blind adaptive distributed decorrelating detector; blind adaptive diversity-combining; decorrelating detection; fading channel; multipath interference; near-far effect suppression; optimal likelihood ratio testing criterion; performance evaluation; real-time implementation; receiver performance; spatial diversity; stochastic gradient techniques; system capacity gain; Adaptive systems; Additive white noise; Decorrelation; Detectors; Diversity reception; Fading; Multiaccess communication; Real time systems; Stochastic resonance; Testing;
Conference_Titel :
TENCON '02. Proceedings. 2002 IEEE Region 10 Conference on Computers, Communications, Control and Power Engineering
Print_ISBN :
0-7803-7490-8
DOI :
10.1109/TENCON.2002.1180307
