【作者】 田雨桐； 李廷军； 杨海宁；

【Author】 TIAN Yutong;LI Tingjun;YANG Haining;University of Electronic Science and Technology of China;

【机构】 电子科技大学；

【摘要】 针对高速磁浮毫米波通信中深度衰落抑制问题,提出一种基于中断分析的接收机数字波束形成方法。针对由反相多径信号叠加引起的深度衰落引起的通信中断问题,考虑莱斯信道的信道状态信息,通过优化接收机波束形成最小化中断概率,并由闭式解确定最优波束形成向量。从多个角度评估了所提方法的性能,比较了不同范围和波束形成方式的接收功率,其中所提方法可使深度衰落减轻50 dBm;观察了EAIP阵列深度衰落位置的场型,观察到不同位置的零点深度较浅;比较了所提方法与等幅同相阵列在不同中断门限下的平均中断概率,发现所提方法可以以80%的高概率将连接保持到1300 m以上,而EAIP阵列只能保持到1100 m。总体评估证明了所提方法在抑制深度衰落、提高系统可靠性方面的有效性。更多还原

【Abstract】 In this work,an outage analysis-based receiver digital beamforming method is proposed for deep-fading suppression in high speed maglev millimeter-wave communication.Facing the communication outage arisen by deep-fading,which is produced by the superposition of phase-reversed multipath signals,the channel state information of the Rician channel is considered to minimize the outage probability by optimizing the receiver beamforming,and the optimal beamforming vector is determined by a closed-form solution.The performance of the proposed method is evaluated in multiple perspectives,the receiving powers in different ranges and beamforming methods are compared,whose deep-fading is alleviated by the proposed method for 50dBm;the patterns in the deep-fading locations of equivalent amplitude and in-phase(EAIP) array are observed,observing the shallower null depths varying in different locations;the mean outage probability with different outage threshold using the proposed method and EAIP array are compared,noticing that the proposed method can hold the connection with a high probability of 80% to be over 1300 m,while the EAIP array can only hold for 1100 m.The overall evaluation proves the effectiveness of the proposed method to suppress the deep-fading and enhance the system reliability.更多还原