Application of Maximum Entropy Theorem in Channel Estimation  

作　　者：ZHANG Zhengyu LOU Jinming JIN Mengdi YAO Yuan ZHU Jingguo 

机构地区：[1]Beijing University of Posts and Telecommunications,Beijing 100876,China [2]Institute of Microelectronics,Chinese Academy of Sciences,Beijing 100029,China

出　　处：《Chinese Journal of Electronics》2020年第2期361-370,共10页电子学报（英文版）

基　　金：supported by the National Key Research and Development Project(No.2017YCF0803404)。

摘　　要：Scholars have been highly concerned with the blind channel estimation of multi-carrier modulation transmission systems, and the decoding process of block codes is usually closely related to channel parameters.Therefore, the accurate estimation of channel parameters is an important method to ensure communication accuracy. According to the transmission characteristics of multi-carrier modulated transmission channels, this paper uses the maximum likelihood theorem and the maximum entropy theorem to put forward a blind channel estimation method based on the proposed received signals. In order to verify the effect of this method, this research utilizes the BP decoding algorithm, which is used in LDPC coding, to calculate the symbol error rate and analyze the estimated effect of the transmission system. The simulation results show that the proposed method can estimate channel parameters effectively, and that the symbol error rate of LDPC decoding is almost similar to that of non-blind channel estimation. This implies that the proposed channel estimation method can effectively improve both channel utilization and transmission efficiency.Scholars have been highly concerned with the blind channel estimation of multi-carrier modulation transmission systems, and the decoding process of block codes is usually closely related to channel parameters.Therefore, the accurate estimation of channel parameters is an important method to ensure communication accuracy. According to the transmission characteristics of multi-carrier modulated transmission channels, this paper uses the maximum likelihood theorem and the maximum entropy theorem to put forward a blind channel estimation method based on the proposed received signals. In order to verify the effect of this method, this research utilizes the BP decoding algorithm, which is used in LDPC coding, to calculate the symbol error rate and analyze the estimated effect of the transmission system. The simulation results show that the proposed method can estimate channel parameters effectively, and that the symbol error rate of LDPC decoding is almost similar to that of non-blind channel estimation. This implies that the proposed channel estimation method can effectively improve both channel utilization and transmission efficiency.

关 键 词：MULTI-CARRIER modulation transmission BLIND channel estimation MAXIMUM entropy THEOREM MAXIMUM LIKELIHOOD THEOREM 

分 类 号：TN911.3[电子电信—通信与信息系统]