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An Efficient Channel Estimation Method in MIMO-OFDM Systems

MIMO-OFDM 시스템에서 효율적인 채널 추정 방식

Jeon, Hyoung-Goo;Kim, Jun-Sig
전형구;김준식

  • Received : 2015.07.20
  • Accepted : 2015.08.28
  • Published : 2015.10.31

Abstract

In this paper, the Walsh coded orthogonal training signals for 4 × 4 multiple input multiple output-orthogonal frequency division multiplexing (MIMO-OFDM) systems are designed and the channel estimation equations are derived as a closed form, taking account of the inter training signal interference problems caused by the multi-path delayed signals. The performances of the proposed channel estimation method are analyzed and compared with the conventional methods[9,14] by using computer simulation. The simulation results show that the proposed methods has better performances, compared with the conventional methods[9,14]. As a result, the proposed method can be used for MIMO-OFDM systems with null sub-carriers.

Keywords

MIMO-OFDM;Channel estimation;Orthogonal training signal;Time domain channel estimation

References

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