Parallel Rate-Variable Punctured Convolutional Coded PPM in Photon Communication

Tomoaki OHTSUKI  Hiroyuki YASHIMA  Iwao SASASE  Shinsaku MORI  

IEICE TRANSACTIONS on Electronics   Vol.E75-C   No.1   pp.44-49
Publication Date: 1992/01/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Joint Special Section on Fundamentals of Next Generation Opto-Technologies)
photon communication,  punctured covolutional coded PPM,  

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We propose parallel rate-variable punctured convolutional coded PPM in photon communication to achieve high energy information efficiency Ie for desired bit error rate (BER) and transmission bandwidth. We theoretically show the BER performance, bandwidth expansion factor β and necessary Ie to achieve BER10-6 of the proposed systems for some combinations of code rates. It is found that the proposed system can achieve high Ie for desired BER and β by selecting a suitable combination of code rates depending on the channel conditions. Moreover, it is showm that the proposed system has better BER performance than RS-coded PPM in the range of small β.