DocumentCode :
3007752
Title :
Blind Multiuser Detection Based on Affine Projection Algorithm for MC-CDMA Uplink
Author :
Wang, Zheng-qiang ; Zhao, Ming
Author_Institution :
Dept. of Phys. & Electron. Inf. Technol., Xiangfan Univ., Xiangfan
fYear :
2008
fDate :
25-26 Sept. 2008
Firstpage :
508
Lastpage :
512
Abstract :
A proved affine projection algorithm (APA) is proposed for uplink asynchronous multicarrier code-division multiple-access (MC-CDMA) systems with multipath Rayleigh-fading channel. The proposed technique is totally blind, i.e., the channel estimation of desired user (the spreading code is known) is carried out by subspace separation, which doesn´t need the rank estimation in the first step, then the result is put into the proved affine projection filter as a parameter. During the update of the weight vector, the APA filter extracts the parameters of blind channel estimation, suppresses multiple access interference (MAI) and recovers the information of desired user. The effectiveness of the proposed blind approach is demonstrated by computer simulation results, which show that it assures satisfactory performances in severe near-far scenarios, while its performances close to those of non-blind minimum-mean-square error (NB-MMSE) receiver.
Keywords :
Rayleigh channels; channel estimation; code division multiple access; interference suppression; least mean squares methods; multipath channels; multiuser detection; MC-CDMA uplink; affine projection filter; blind channel estimation; blind multiuser detection; multipath Rayleigh-fading channel; multiple access interference suppression; nonblind minimum-mean-square error receiver; subspace separation; uplink asynchronous multicarrier code-division multiple-access systems; weight vector; Channel estimation; Data mining; Information filtering; Information filters; Multiaccess communication; Multicarrier code division multiple access; Multiple access interference; Multiuser detection; Projection algorithms; Rayleigh channels; APA; Blind Channel Estimation; Blind multiuser detection; MAI; MC-CDMA; Multipath Fading;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Genetic and Evolutionary Computing, 2008. WGEC '08. Second International Conference on
Conference_Location :
Hubei
Print_ISBN :
978-0-7695-3334-6
Type :
conf
DOI :
10.1109/WGEC.2008.77
Filename :
4637496
Link To Document :
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