Effect of Noise-Only-Paths on the Performance Improvement of Post-Demodulation Selection Diversity in DS/SS Mobile Radio

Akihiro HIGASHI  Tadashi MATSUMOTO  Mohsen KAVEHRAD  

Publication
IEICE TRANSACTIONS on Communications   Vol.E76-B   No.4   pp.438-443
Publication Date: 1993/04/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Radio Communication
Keyword: 
spread spectrum,  direct sequence,  RAKE reception,  selection diversity,  noise-only-path,  

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Summary: 
The path diversity improvement inherent in direct sequence spread spectrum (DS/SS) signalling under multi-path propagation environments is investigated for mobile/personal radio communications systems that employ DPSK modulation. The bit error rate (BER) performance of post-demodulation selection diversity reception is theoretically analyzed in the presence of noise-only-paths in the time window for diversity combining. Results of laboratory experiments conducted to evaluate the BER performance are also presented. It is shown that the experimental results agree well with the theoretical BER.