Performance Analysis of the Satellite Communication System Including the Grop Delay Characteristics

군지연 특성을 고려한 위성통신 시스템의 성능 분석

  • 맹준호 (충북대학교 전자공학과 및 컴퓨터정보통신연구소) ;
  • 유흥균 (충북대학교 전자공학과 및 컴퓨터정보통신연구소) ;
  • 김기근 (국방과학연구소 4체계 위성시스템연구팀) ;
  • 이대일 (국방과학연구소 4체계 위성시스템연구팀) ;
  • 김도선 (국방과학연구소 4체계 위성시스템연구팀)
  • Published : 2004.03.01


This paper addresses the effect of group delay in satellite communication system. Phase of signal is distorted by the non-constant group delay. Group delay can be modeled as linear, parabolic and cubic type according to the polynomial characteristic. We investigate BER performance of satellite communication system with each 3 kinds of group delay. As signal bandwidth becomes wider, group delay makes more influence on the signal. BNR performance of satellite communication system is found when data rates are 1Mbps, 4Mbps and 8Mbps. Convolution coding with the code rate of 1/2 or 7/8 is used. At BER =10$\^$-5/, system with group delay needs more SNR of minimum 0.3㏈ to maximum 4.4㏈ than system without group delay. The worst case of BER performance happens in the linear group delay, 7/8 punctured convolution coding and 8 Mbps. The required SNR is increased by 4.4㏈ at this worst case.


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