Theoretical Derivation Method of Bit Error Rate in TDMA/TDD Transmitter Diversity under Cochannel Interference

Fumiaki MAEHARA  Fumihito SASAMORI  Fumio TAKAHATA  

IEICE TRANSACTIONS on Communications   Vol.E85-B   No.3   pp.663-666
Publication Date: 2002/03/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technology
microcellular mobile communications,  bit error rate (BER),  cochannel interference,  TDMA/TDD transmitter diversity,  

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Transmitter diversity is a powerful technique to improve the transmission quality of downlink in microcellular mobile communications systems. Under cochannel interference (CCI) at the base station (BS), the transmitter diversity is not necessarily effective, because the desired-plus-interference signal power used as a criterion of downlink branch selection is not always relative to the downlink propagation condition. This paper proposes the theoretical derivation of bit error rate (BER) performance in the transmitter diversity under CCI occurring at BS, as parameters of average SIR at BS, normalized Doppler frequency, and so on. It is confirmed from the correspondence of theoretical results with simulation results that the proposed theoretical approach is applicable to the CCI environments at BS.