Improved OFDM Semi-blind Channel Estimation Algorithm
Chenfeng Li · Computer and Modernization · 2014
Channel estimation algorithm can be divided into three categories for priori information: the estimation based on reference signal,blind estimation and semi-blind estimation. Semi-blind estimation is a channel estimation algorithm combined with the advantages of the blind estimation and channel estimation method and the estimation method based on training sequence. This paper obtains the channel estimation value through semi-blind channel estimation algorithm based on pilot assisted and semi-blind channel estimation algorithm based on direct judgment,then defines a confidence function to obtain the weighted coefficient γ,combines the semi-blind channel algorithm based on pilot assisted and the estimation algorithm based on direct judgment to effectively improve the accuracy of channel estimation.