Transmit scheme to improve coverage in simulcast system based on wideband channel measurement in indoor at 6 GHz

作     者：XIN Liang ZHANG Jian-hua GAO Jun-jun LI Xiao-fan 

作者机构：Chipset R&D-Systems Engineering-Systems Design VIATelecom Wireless Technology Innovation Institute Key Laboratory of Universal Wireless Communication Ministry of Education Beijing University of Posts and Telecommunications State Ratio-monitoring-center Testing Center 

出 版 物：《The Journal of China Universities of Posts and Telecommunications》 (中国邮电高校学报（英文版）)

年 卷 期：2013年第20卷第2期

页      面：48-53,72页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0810[工学-信息与通信工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080402[工学-测试计量技术及仪器] 0804[工学-仪器科学与技术] 081001[工学-通信与信息系统] 

基　　金：supported by the National Natural Science Foundation of China(61171105) China Information Technology Designing & Consulting Institute Ltd(CITC)-School of Information and Communication Engineering(SICE)in BUPT Graduate Innovation Fund for 2011 

主　　题：channel measurement delay difference phase rotation coverage robustness 

摘      要：Array gain would be well exploited to improve power coverage if some powerful multipath components from different radio links can coherently combine at the receiver （Rx）. Thus, in this paper, an algorithm is proposed for transmission in simulcast system, where partial channel state information （CSI） is needed. Based on measured multipath channel, performance of the proposed algorithm is evaluated. According to simulation results, the proposed algorithm outperforms the direction summation （DS） scheme and multipath antenna diversity （MAD） algorithm, with 2～4 dB advantage over the latters. Especially in line of sight （LOS） scenario, the advantage is more obvious. Besides, the proposed algorithm brings more gain with increasing number of transmit antennas without additional power. Finally, robustness of the proposed algorithm is examined with imperfect CSI.