Performance Analysis of QPSK and QDPSK Signals with Diversity Reception and Coding Techniques in Fading Plus Impulsive Noise Environments

임펄스 잡음과 페이딩이 함께 존재하는 환경에서 다이버시티 수신 기법과 부호화 기법을 채용하는 QPSK 및 QDPSK 신호의 성능 해석

  • Leem, Kill-Yong (Dept.of Communication, Inha technical Junior College) ;
  • Cho, Sung-Joon (Dept.of Telecom. & Infor. Eng., Hankuk Aviation University) ;
  • Lee, Jin (Dept.of Telecom. & Infor. Eng., Hankuk Aviation University)
  • 임길용 (인하공업전문대학 통신과) ;
  • 조성준 (한국항공대학교 항공통신정보공학과) ;
  • 이진 (한국항공대학교 항공통신정보공학과)
  • Published : 1994.12.01

Abstract

The error probability of QPSK and DPSK signals with diversity reception technique in m-distribution fading plus impulsive noise environments has been derived and the error probability is evaluated and compared with that in Gaussian noise environment. The error performance degrades as impulsive noise becomes strong and degree of degradation of signal performance in QDPSK signal is larger than that in QPSK signal. The diversity reception technique can improve the error performance not only in fading plus Gaussian noise environment but in fading plus impulsive noise environment. When diversity reception technique is used, the improvement of error performance attains about 10dB to 15dB in terms of CNR as compared with that in non diversity reception. Among diversity techniques the maximal ratio combining is must effective. When diversity reception and coding techniques are used together in impulsive noise plus Rayleigh fading environments, the improvement of error performance attains about 12dB to 15dB in terms of CNR as compared with that of only diversity reception technique case and the improvement of error perform- ance in RS coding attains about 2dB in terms of CNR as compared with that of BCH coding case.

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