说明：  论文首先阐述了3GPP LTE系统物理层的主要演变是采用了OFDM技术，3GPP LTE是个OFDM系统，针对实际LTE系统，提出了基于LMMSE算法在频域进行维纳滤波，再利用频域估计出来的值在时域进行一次维纳滤波
(Paper first described the physical layer of 3GPP LTE system, the main evolution is the adoption of OFDM technology, 3GPP LTE OFDM system is for real LTE system, proposed LMMSE algorithm based on Wiener filtering in the frequency domain, frequency domain and then use the value estimated by once in the time domain Wiener filter)