Selection Diversity Reception Based on Cross-Channel-Interference Measurement for Digital Mobile Radio

Hong ZHOU  Susumu YOSHIDA  Tsutomu TAKEUCHI  

IEICE TRANSACTIONS (1976-1990)   Vol.E73   No.5   pp.658-664
Publication Date: 1990/05/25
Online ISSN: 
Print ISSN: 0000-0000
Type of Manuscript: Special Section PAPER (Special Issue on Information Theory and Its Applications)

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It is well-known that the bit error rate (BER) of digital transmission through a mobile/portable communication channel is strongly dependent on the multipath delay spread. In this paper, we propose an antenna pattern diversity reception system with a new selection strategy based on the measurement of cross-channel-interference which has been confirmed to be a linear function of the multipath rms delay spread assuming BPSK as an example. The coherence bandwidth and BER performances using such a system are studied theoretically and considerable improvement is observed. In addition, the field experiment using a four-direction antenna in 400 MHz band was made to measure error patterns for an individual antenna pattern, and the proposed system was shown to work well even in a real urban area based on the measured data by computer simulation.