대한전자공학회논문지 (Journal of the Korean Institute of Telematics and Electronics)

대한전자공학회 (The Institute of Electronics and Information Engineers)
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Convolutional Code/Binary CPFSK 복합 전송시스템의 성능개선에 관한 연구

Performance Improvement on the Combined Convolutional Coding and Binary CPFSK Modulation

  • 최양호 (한국과학기술원 전기 및 전자공학과) ;
  • 백제인 (한국전자통신연구소) ;
  • 김재균 (한국과학기술원 전기 및 전자공학과)
  • Choi, Yang Ho (Dept. of Electrical Engineering, KAIST) ;
  • Baek, Je In (Electronics and Telecomms. Research Institute) ;
  • Kim, Jae Kyoon (Dept. of Electrical Engineering, KAIST)
  • 발행 : 1986.05.01
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초록

A binary continuous phase frequency shift keying (CPFSK), whose phase is a continuous function of time and instantaneous frequency is constant, is a bandwidth efficient constant envelope signalling scheme. A transmitting signal is formed by combined coding of a convolutional encoder and a binary CPFSK modulator. The signal is transmitted throuth additive white Gaussian noise(AWGN) channel. If the received signal is detected by a coherent maximum likelihood(ML) receiver, error probability can be expressed approximately in terms of minimum Euclidean distance. We propose rate 2/4 codes for the improvement of error performance without increating the data rate per bandwidth and the receiver complexity. Its minimum Euclidean distances are compared with those of rate \ulcornercodes as a function of modulation index and observation interval.

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