Improved MC-CDMA System Channel Estimation Algorithm based on DFT
Liu Luo-kun · Communications technology · 2009
LS channel estimation algorithm has low computation complexity and is easy in implementation,and however,but the result is sensitive to the influence of channel noise,thus the performance is poor.This paper describes a new improved LS algorithm based on DFT,which could reduce the influence of noise to the accuracy of the algorithm.The algorithm makes use of the character of parallel PN signals,acquires channel information by the delay points information getting algorithm and uses it to suppress the noise to maximum.The computer simulation indicates that,Compared with the existing improved LS algorithms based on DFT,the algorithm raises the estimation accuracy and its performance is even better when the SNR is low.