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Performance of Turbo Codes in the Direct Detection Optical PPM Channel  

이항원 (한국특허정보원)
이상민 (강릉대학교 전자공학과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.28, no.6C, 2003 , pp. 570-579 More about this Journal
Abstract
The performance of turbo codes is investigated in the direct detection optical PPM channel. We assume that an ideal photon counter is used as an optical detector and that the channel has background noise as well as quantum noise. Resulting channel model is M-ary PPM Poisson channel. We propose the structure of the transmitter and receiver for applying turbo codes to this channel. We also derive turbo decoding algorithm for the proposed coding system, by modifying the calculation of the branch metric inherent in the original turbo decoding algorithm developed for the AWGN channel. Analytical bounds are derived and computer simulation is performed to analyze the performance of the proposed coding scheme, and the results are compared with the performances of Reed-Solomon codes and convolutional codes.
Keywords
turbo code; pulse position modulation; optical Poisson channel;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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