A Coded Modulation Design with Equal Utilization of Signal Dimensions on Two Carrier Frequencies Using a Simple Convolutional Code

Chin-Hua CHUANG  Lin-Shan LEE  

IEICE TRANSACTIONS on Communications   Vol.E79-B    No.10    pp.1537-1548
Publication Date: 1996/10/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Communication Theory
coded modulation,  noisy channel,  performance evaluation,  bandwidth efficiency,  Viterbi decoder,  

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This paper presents an improved pragmatic approach to coded modulation design which provides higher coding gains especially for very noisy channels including those with Rayleigh fading. The signal constellation using four equally utilized dimensions implemented with two correlative carrier frequencies is adopted to enhance the performance of the pragmatic approach previously proposed by Viterbi et al.. The proposed scheme is shown to perform much better by analysis of system performance parameters and extensive computer simulation for practical channel conditions. The bandwidth and power efficiencies are also analyzed and discussed to provide more design flexibility for different communications environments.