An integrated interference suppression scheme with an adaptive equalizer for digital satellite communication systems

Takatoshi Sugiyama, Masanobu Suzuki, Shuji Kubota

Research output: Contribution to journalArticle

13 Citations (Scopus)


This paper proposes an integrated interference suppression scheme which realizes interference-resistant satellite digital signal transmission systems. It employs a notch filier in the receiving side to suppress the co-channel interference (CCI) signal. Moreover, the proposed scheme employs an adaptive equalizer combined with a forward error correction (FEC) scheme to improve the Pe (probability of error) performance degradation due to the inter-symbol interference caused by notch filtering of the desired signal. In the typical frequency modulation (FM) CCI environment with a BWi/fN of 2.3 (BWi: interference signal required bandwidth, fN: one half the Nyquist bandwidth of the desired signal), a δf/fn of 1.05 (δf: interference frequency offset) and a D/U of 3 dB (desired to undesired (interference) signal power ratio), the proposed scheme improves the required Et,/Na by 1.5 dB at a Pe of 10"4 compared to that without an adaptive equalizer.

Original languageEnglish
Pages (from-to)191-196
Number of pages6
JournalIEICE Transactions on Communications
Issue number2
Publication statusPublished - 1996 Jan 1



  • Adaptive equalizer
  • Co-channel interference
  • FEC
  • Interference suppression
  • Notch flter
  • Satellite communication

ASJC Scopus subject areas

  • Software
  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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