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This paper provides three channel estimations including LS (least square) estimation, LMMSE (linear minimum mean square error) estimation and Lr-MMSE (low rank minimum mean square error) estimation utilized to the relay channel to approximate the optimal solution in OFDM system. The simulation results show that LMMSE estimation outperforms the other two estimations, but it is too complicated. The...
OFDM is a promising technique for achieving high-speed data transmission in future cellular system and WLAN system, and the channel detection and the channel estimation are very important for subchannel allocation and channel equalization. The PSD estimation could be imposed to obtain accurate signal estimation. In this paper, a channel detection algorithm and a channel estimation algorithm based...
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