Blind estimation of channel length for OFDM systems

  • Authors:

  • Bin Sheng;Xiangyang Wang;Xiaohu You;Lan Chen

  • Affiliations:

  • National Mobile Communications Research Laboratory, Southeast University, Nanjing, P. R. China;National Mobile Communications Research Laboratory, Southeast University, Nanjing, P. R. China;National Mobile Communications Research Laboratory, Southeast University, Nanjing, P. R. China;DoCoMo Beijing Communications Laboratories Co., Ltd, Beijing, P. R. China

  • Venue:
  • WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
  • Year:
  • 2009

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Abstract

In orthogonal frequency division multiplexing (OFDM) systems, multipath fading channels introduce interference between adjacent symbols. Although the interference degrades the system performance considerably, it also provides the information of channel impulse response (CIR) length to us. Therefore, based on the estimation of interference in the cyclic prefix (CP) interval, we can use the minimum description length (MDL) criterion to detect the channel length blindly.