Journal of the Institute of Electronics Engineers of Korea TC (대한전자공학회논문지TC)

The Institute of Electronics and Information Engineers (대한전자공학회)
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A new noncoherent detection algorithm for DBO-CSS

새로운 DBO-CSS 수신기 구조

  • Published : 2007.04.25
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Abstract

In this paper, we propose a new decoding method for differentially biorthogonal chirp spread spectrum (DBO-CSS). In DBO-CSS, the information is carried on the differential phase not between the adjacent sub-chirp symbols but between the sub-chirp symbols in the same position of adjacent full-chirp symbol. So, the conventional multiple symbol differential detection (MSDD) algorithms to enhance the BER performance can not be applied to the DBO-CSS directly. In this paper, we propose a new differential detection algorithm based on a partial MSD(multiple symbol detection) and a viterbi algorithm. It is shown that the performance gain of the proposed algorithm when compared with that of the conventional detection algorithm is around 2.5dB at BER = 10-5.

본 논문에서는 DBO-CSS를 위한 새로운 수신기 구조를 제안한다. DBO-CSS에서는 정보가 인접한 서브첩(sub-chirp)간의 차분 위상이 아니라 인접한 풀첩(full-chirp) 내의동일 위치에 있는 서브첩간의 차분위상에 실리게 된다. 따라서, DBO-CSS의 BER 성능 향상을 위해 일반적인 MSDD(multiple symbol differential detection) 알고리듬 등은 바로 적용할 수 없다. 본 논문에서는 부분적 MSD(multiple symbol detection)와 viterbi 알고리듬에 기반한 새로운 차분 검출 알고리듬을 제안한다. 실험결과, 제안하는 구조는 기존의 차분 검출 방식과 biorthogonal 복호기로 구성된 수신기에 비해 BER=10-5일 때 약 2.5dB의 SNR이 향상됨을 확인하였다.

Keywords

References

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