Intrinsic Robustness of MISO Visible Light Communications: Partial CSIT Can be as Useful as Perfect One

作     者：Zhang, Yan-Yu 

作者机构：Natl Digital Switching Syst Engn & Technol Res Ct Zhengzhou 450000 Henan Peoples R China 

出 版 物：《IEEE TRANSACTIONS ON COMMUNICATIONS》 (IEEE通讯汇刊)

年 卷 期：2019年第67卷第2期

页      面：1297-1312页

核心收录：

学科分类：0810[工学-信息与通信工程] 0808[工学-电气工程] 08[工学] 

基　　金：National Natural Science Foundation of China Guangdong Province Science and Technology Planning Project of China [2017B010114002] China Scholarship Council (CSC) 

主　　题：Visible light communications multi-input single-output channel state information intrinsic robustness 

摘      要：We consider a multi-input single-output visible light communication (MISO-VLC) system. For such system under both average and peak optical power constraint, an optimal space constellation maximizing the received minimum Euclidean distance is attained among all the feasible sets, respectively, for the case with or without channel state information at the transmitter (CSIT). These designs demonstrate that the optimal transmission only requires CSIT which is related to the possibilities of the echelon arrangement of the channel coefficients and jointly determined by the power regime and the ordering of channel coefficient values. Our findings point out that it is not necessary to probe the exact value of the MISO-VLC channel vector and limited CSIT can sufficiently guarantee the intrinsic robustness. In addition, the optimal designs admit low-complexity maximum likelihood detection. These properties make our proposed optimal designs especially attractive in such channels.