Effects of Non-matched Receiver Filters on π/4-DQPSK Bit Error Rate in Rayleigh Fading

Chun Sum NG  Tjeng Thiang TJHUNG  Fumiyuki ADACHI  

IEICE TRANSACTIONS on Communications   Vol.E77-B    No.6    pp.800-807
Publication Date: 1994/06/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Radio Communication
radio communication,  cellular mobile radio,  Rayleigh fading,  bit error rate,  

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The effect of intersymbol interference resulting from non-matched receiver filtering on the bit error rate (BER) performance of π/4-DQPSK systems recently adopted in the North American and Japanese digital cellular standards, is analyzed in Rayleigh fading. With a Gaussian or a Butterworth (of order N, 2N10) receiver filter, the BER performance is found to degrade by only a small fraction of a decibel from the performance with ideally matched receiver filters. A 4th-order Butterworth receiver filter leads to BER curves which almost coincide with those of the ideally matched filtering condition.