The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Regularized LS Signal Detection for OFDM in Fast Time Varying Channels

고속 시변 채널 OFDM을 위한 안정화된 LS 신호검출

  • Lim, Dongmin (Department of Electronic Engineering, Gyeongsang National University)
  • Received : 2015.12.01
  • Accepted : 2015.12.18
  • Published : 2016.01.31
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Abstract

The OFDM with LS signal detection performs worse in fast time varying channels as the channel matrix has higher chance of becoming ill-conditioned. Various regularization methods are applied to avoid performance degradation in LS signal detection. In this paper, we proposed a CGLS method with the stopping criteria imposed by the characteristics of the modulation method, which shows performance comparable to that of the optimal LMMSE.

LS 신호검출 OFDM은 채널 행렬이 불량 조건이 될 확률이 증가하여 고속 시변 채널에서 성능이 저하된다. LS 신호검출의 성능저하를 방지하기 위하여 다양한 안정화 방식이 적용되고 있다. 본 논문에서는 변조방식의 특성이 반영된 실행중지 기준을 적용한 CGLS 방식을 제안하였으며 최적의 LMMSE에 근접한 성능을 얻을 수 있었다.

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References

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