Convolutional Coded Continuous Phase Modulation with Plural Modulation Indices

Teruhiko HONDA  Iwao SASASE  Shinsaku MORI  

IEICE TRANSACTIONS (1976-1990)   Vol.E70   No.12   pp.1214-1219
Publication Date: 1987/12/25
Online ISSN: 
Print ISSN: 0000-0000
Type of Manuscript: PAPER
Category: Communication Systems and Transmission Equipment

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The convolutional coding combined with continuous phase modulation (CPM) is well known for its good tradeoff between coding gain and bandwidth. On the other hand, the multi-h modulation i.e., the scheme in which plural modulation indices are in cyclically use, is also introduced to obtain the higher power efficiency. However the study of the combination of convolutional coding multi-h scheme is not reported yet. In this study, we consider the combination of convolutional coded CPM with multi-h modulation to achieve larger Euclidean distance. We found that, in some cases, our proposed convolutional coded multi-h CPM can give considerable gains compared with those of conventional single-h scheme.