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 

机构地区：[1]Chipset R&D-Systems Engineering-Systems Design, VIATelecom [2]Wireless Technology Innovation Institute, Key Laboratory of Universal Wireless Communication, Ministry of Education, Beijing University of Posts and Telecommunications [3]State Ratio-monitoring-center Testing Center

出　　处：《The Journal of China Universities of Posts and Telecommunications》2013年第2期48-53,72,共7页中国邮电高校学报（英文版）

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

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.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.

关 键 词：channel measurement delay difference phase rotation COVERAGE ROBUSTNESS 

分 类 号：TN925[电子电信—通信与信息系统]