A Multistage Blind Adaptive Array Antenna for Multiuser Signal Detection in Asynchronous SS Systems

Yukihiro KAMIYA  Kenichi OCHIAI  Yoshio KARASAWA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E86-B   No.8   pp.2414-2424
Publication Date: 2003/08/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Wireless Communication Technology
Keyword: 
adaptive arrays,  CMA,  spread spectrum,  multiuser detection,  software defined radio (SDR),  

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Summary: 
Adaptive arrays have been recognized as an attractive mean for overcoming multipath fading and interference rejection in the field of mobile communications. In, an adaptive array applicable to single-user spread spectrum (SS) systems has been proposed. In this system, any a priori information concerning incoming signal, even the spreading code and synchronization, is not necessary while it achieves equalizing, beamforming and despreading of a received signal, simultaneously. In this paper, we propose a multistage blind adaptive array antenna based on the above-mentioned adaptive algorithm in order to realize blind signal processing that is applicable to multi-user SS systems. Behavior and performance of the proposed multistage system are examined through computer simulations.