Application of Moment Technique in Performance Analysis of Coded 8-PSK over Hard-Limited Satellite Channels in the Presence of Interference and Noise

Nympha JAYAMANNE  Ikuo OKA  Shinsaku MORI  

IEICE TRANSACTIONS (1976-1990)   Vol.E72   No.10   pp.1119-1126
Publication Date: 1989/10/25
Online ISSN: 
Print ISSN: 0000-0000
Type of Manuscript: PAPER
Category: Satellite Communication

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This paper presents an analytical approach to the error performance of Trellis Coded 8-PSK with Viterbi decoding, over a Hard-Limited (HL) satellite channel. Although an error probability of Trellis Coded Modulation (TCM) depends on the transmitted sequence in general, we treat a sequence independent TCM composed of a convolutional code of rate 2/3 and constraint length 3 combined with 8-PSK. The channel is considerered to be disturbed by up-link and down-link cochannel interference (CCI) apart from both up-link and down-link noise. It is assumed that the system band is sufficiently wide so that the signal and each interference pass without distortion. For the non-Gaussian characteristics of received signal due to the nonlinearity and CCI, the moments of path metric is employed in the analysis. The first event error probability is obtained by the moments with the aid of the Gram-Charlier expansion without the knowledge of the actual probability density function (pdf) of the metric related with the non-Gaussian characteristics. The bit error probability is derived through the transfer function method. Numerical results of coded 8-PSK are presented for both hard-limited satellite channels and linear terrestrial channels with a comparison to uncoded QPSK.