Analysis of Multicarrier DS/DPSK Systems with Single Tone Interference Rejection

단일톤 간섭제거를 위한 다단반송파 DS/DPSK 시스템의 성능분석

  • 엄종선 (한국국방연구원 전자통신무기연구실) ;
  • 김동인 (서울시립대학교 전자공학과)
  • Published : 1997.04.01

Abstract

Narrowband signals can be treated like a single tone interference at the receiver which demodulates wideband signals spectrum overlaid at the same frequency band. In this paper, the single tone interference is effectively suppressed by the use of a multicarrier DPSK direct-sequence(DS) spread spectrum(SS) with maximal-ratio(MR) combining instead of notch filter, which is hard to implement. A noncoherent DPSK system is considered because it is more realizable and does not require any complicate phase tracking, compared with a single carrier system subject to a constraint system bandwidth, and their performance comparisons are validated through simulation. We also propose a suboptimal-ratio(SR) combining which yields uniform and tight low bound on the performance of the MR combining, and then system parameters re optimized by theoretically evaluating the low bound, since an exact analysis appears intractable.

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References

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