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Reference Symbol Arrangement in LTE OFDM Systems

LTE OFDM 시스템에서의 기준 심볼 배치

Choi, Seung-Kuk
최승국

  • Received : 2015.08.07
  • Accepted : 2015.08.31
  • Published : 2015.12.31

Abstract

For the purpose of estimation of time variant frequency selective transmission channels, reference symbols are usually employed. The bit error performance of LTE OFDM systems is analyzed in the case of LTE standard reference symbol arrangement. Results show that LTE OFDM system with this LTE reference symbol arrangement is robust against Doppler time variant fading. However, the performance of that system is degraded due to channel estimation error in frequency domain. An equidistant arrangement with a diamond shape structure of reference symbols, however having 4 subcarriers distance in frequency domain, is suggested for the optimal channel estimation.

Keywords

LTE;OFDM;reference symbol;bit error rate

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Acknowledgement

Supported by : Incheon National University