New bounds on the mutual information for discrete constellations and application to wireless channel estimation  

作　　者：A.Taufiq Asyhari 

机构地区：[1]School of Computing and Digital Technology,Birmingham City University,Millennium Point,Birmingham,B47XG,UK

出　　处：《Digital Communications and Networks》2020年第4期542-546,共5页数字通信与网络（英文版）

摘　　要：The lack of closed-form expressions of the mutual information for discrete constellations has limited its uses for analyzing reliable communication over wireless fading channels.In order to address this issue,this paper proposes analytically-tractable lower bounds on the mutual information based on Arithmetic-Mean-Geometric-Mean(AMGM)inequality.The new bounds can apply to a wide range of discrete constellations and reveal some insights into the rate behavior at moderate to high Signal-to-Noise Ratio(SNR)values.The usability of the bounds is further demonstrated to approximate the optimum pilot overhead in stationary fading channels.

关 键 词：Channel estimation Coded modulation Discrete constellations Mutual information Wireless communications 

分 类 号：TN92[电子电信—通信与信息系统]