Effects of Filtering on Coded 16-PSK Signal

Aminuddin CHALID  Shinsaku MORI  

IEICE TRANSACTIONS (1976-1990)   Vol.E70   No.11   pp.1108-1115
Publication Date: 1987/11/25
Online ISSN: 
Print ISSN: 0000-0000
Type of Manuscript: PAPER
Category: Communication Theory

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In this paper we present a new analytical method, in evaluation of the upper bound to the symbol error probability performance of coded M-PSK signals, subject to the filtering effect, in addition to white gaussian noise. The effects of transmission filter on performance of 4-state code of coded 16-PSK signal, detected with coherent demodulator coupled with maximum likelihood sequence decoder (Viterbi algorithm) are demonstrated with numerical results. The filtering degradation of the coded system is then compared to its counterpart uncoded system. We found that the coding gain slightly increase as filtering bandwidth decreases (increasing coding gain by more than 1 dB at BT2) and generally, the Full roll off channel filtering shows better performance relative to the Butterworth or Chebyshev filtering.