A Feedback Type Adaptive Array Antenna with One Bit Feedback Information and Adaptive Update Size in FDD System

Mona SHOKAIR  Yoshihiko AKAIWA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E88-B   No.10   pp.4074-4080
Publication Date: 2005/10/01
Online ISSN: 
DOI: 10.1093/ietcom/e88-b.10.4074
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
Keyword: 
feedback-type adaptive array antenna,  frequency division duplexed,  feedback bits,  

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Summary: 
The purpose of this paper is to improve a feedback-type adaptive array antenna (AAA) with feedback information quantized by one bit which was presented recently on TDMA system by an author of this paper. The improvement is made by using adaptive, instead of constant, update size of adaptive antenna weights control. Computer simulation results show that the performance of this system is improved to be almost equivalent to the performance of a system without quantization of the feedback information for wide range of fading speed. The results include the effect of control delay time and the maximum Doppler frequency under flat fading and frequency-selective fading.