OFDM简单链路，包含信道估计和信道均衡，算法包括LS和MMSE-OFDM simple links, including channel estimation and channel equalization, algorithms, including the LS and MMSE

A subspace-based blind method is proposed for estimating the channel responses of a multiuser and multiantenna orthogonal frequency division multiplexing (OFDM) uplink system. It gives estimations to all channel responses subject to a scalar ma