本論文介紹了正交分頻多工技術(Orthogonal Frequency Division Multiplexing,OFDM)的流程、多天線分集技術之空頻區塊碼(Space Frequency Block Code,SFBC)的編碼方式、LTE/LTE-A下行鏈路系統簡介、通道與空間通道模型(Spatial Channel Model,SCM)、可加性白色高斯雜訊(Additive White Gaussian Noise,AWGN)、通道估測與等化技術,並參考LTE/LTE-A下行鏈路系統的規格來進行通道的估測與等化,比較幾種不同的通道估測技術在不同的通道中與不同的天線數量下的性能評比。;This thesis introduces the orthogonal frequency division multiplexing technology、space frequency block code、LTE/LTE-A downlink system、spatial channel model、additive white gaussian noise、channel estimation and equalization,and reference to LTE/LTE-A downlink system specifications for channel estimation and equalization,compared the performance of different channel estimation techniques for different channels and different number of antennas。