Combining Techniques for Spatial-Domain Path-Diversity Using an Adaptive Array

Kenzaburoh FUJISHIMA  Yasuhiko TANABE  Toshihiko NISHIMURA  Yasutaka OGAWA  Takeo OHGANE  

Publication
IEICE TRANSACTIONS on Communications   Vol.E83-B   No.12   pp.2593-2599
Publication Date: 2000/12/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Wireless Communication Technology
Keyword: 
adaptive antenna,  path-diversity,  mobile communications,  multipath propagation,  maximal ratio combining,  

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Summary: 
Frequency-selective fading due to multipath propagation is serious hindrance in high-speed TDMA mobile communications. An adaptive antenna has been proposed to reduce the frequency-selective fading and realize path-diversity. This paper presents a criterion which selects multipath signals and weighting factors for combining them. First, we describe a selection criterion which chooses the multipath signals for the path-diversity. We propose a ratio of signal power to error power for the criterion. Furthermore, we propose weighting factors which realize approximately the maximal ratio combining. Computer simulation results show that the proposed selection criterion and weighting factors reveal excellent performance.