DocumentCode :
660332
Title :
Joint-Iterative Power Allocation and Interference Suppression Using MBER Technique for Cooperative CDMA Systems
Author :
Guijie Wang ; Yunlong Cai ; Minjian Zhao ; Jie Zhong
Author_Institution :
Dept. of Inf. Sci. & Electron. Eng., Zhejiang Univ., Hangzhou, China
fYear :
2013
fDate :
2-5 June 2013
Firstpage :
1
Lastpage :
5
Abstract :
In this work, we study a joint iterative power allocation and interference suppression technique based on the minimization of the bit error rate (BER) cost function for cooperative direct-sequence code division multiple-access (DS-CDMA)systems that employ multiple relays and the amplify-and-forward (AF) strategy. We develop stochastic gradient (SG) algorithms based on the minimum-BER (MBER) criterion to jointly update the parameter vectors that allocate the power levels among the relays subject to a power constraint and the linear receiver. Simulation results show that the proposed adaptive algorithms significantly outperform the two other comparison schemes.
Keywords :
adaptive filters; amplify and forward communication; antenna arrays; code division multiple access; cooperative communication; error statistics; filtering theory; gradient methods; interference suppression; minimisation; radio receivers; radiofrequency interference; spread spectrum communication; stochastic processes; AF strategy; DS-CDMA; MBER technique; SG algorithms; adaptive algorithms; adaptive filtering; amplify-and-forward strategy; bit error rate cost function minimization; cooperative CDMA systems; cooperative direct-sequence code division multiple-access systems; interference suppression technique; joint iterative power allocation technique; linear receiver; minimum-BER criterion; multiple collocated antennas; parameter vectors; power constraint; stochastic gradient algorithms; Bit error rate; Least squares approximations; Multiaccess communication; Receivers; Relays; Resource management; Vectors;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vehicular Technology Conference (VTC Spring), 2013 IEEE 77th
Conference_Location :
Dresden
ISSN :
1550-2252
Type :
conf
DOI :
10.1109/VTCSpring.2013.6692614
Filename :
6692614
Link To Document :
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