一种V2V多天线几何去极化信道建模  

Research on V2V multi-antenna geometrical depolarization channel modeling

作　　者：杨晓丽[1,2] 孙学宏[1,2,3] 白冰[1,2] Yang Xiaoli;Sun Xuehong;Bai Bing(Dept, of Information Engineering, School of Physics & Electronics Information, Ningxia University, Yinchuan 750021 , China;Key Laboratory of Intelligent Sensing for Desert Information, Yinchuan 750021 , China;Beijing Key Laboratory of Network System Architecture & Convergence,Beijing 100876 , China)

机构地区：[1]宁夏大学物理电气信息学院信息工程系,银川750021 [2]宁夏沙漠信息智能感知重点实验室,银川750021 [3]北京市网络体系构建与融合重点实验室,北京100876

出　　处：《计算机应用研究》2016年第10期3117-3122,共6页Application Research of Computers

基　　金：国家自然科学基金资助项目(61561039;61461044);宁夏自然基金资助项目(NZ14045);宁夏大学科学研究基金资助项目(ZR1311)

摘　　要：随着极化相关技术的发展,极化调制在V2V(vehicle-to-vehicle)通信系统中的应用越来越广泛。但由于V2V通信环境复杂,极化调制在V2V通信中会产生去极化效应,从而影响通信质量。为了能够识别去极化效应的大小,提出一种新的基于几何散射理论的V2V多天线极化信道模型。该模型可通过已知的多天线配置、极化场辐射模式及散射体的空间分布,建立去极化效应模型,从而将信道的去极化效应由交叉极化鉴别度——XPD(cross polarization discrimination)的值表示,以拓展极化调制在V2V系统中的使用范围,提高传输速率。实验结果表明,XPD的值受到车辆间距离影响存在阈值,并强烈依赖于到达方位角的分布常数,且当到达方位角的值不同时,改变到达仰角的最大值的大小,XPD值的变化呈固定趋势。因此,所提出的多天线几何信道模型,成功地将极化引入多天线的V2V通信,可以为极化域通信的进一步研究奠定基础。W ith the developm ent of pola rization-re lated tech nolog y, the a p plied o f polarization m o dulatio n in V 2 V com m unication become more w idely , but it will produce the de polarization effect due to the com plexity o f V2V com m unication en viro n me n t, w h ich seriously affect the com m unication q u a lity . This paper proposed a new V2V multi-antenna polarization channelm odel based on the geom etric scattering th e o ry , th a t was able to id e n tify the size o f the polarization effects. The method to establish model o f the depolarization effect based on the known antenna configuration , spatial polarization field radiation patternsand the distribution of scatterers, thus in dicated the depolarization effect of polarization channel by the values o f cross polarization discrimination . It cou ld expand the use o f polarization m odulation fo r V2V communication system , and im proved the rateo f info rm atio n transm ission. Experim enta l results show th a t the value o f X P D has a threshold th a t influ e n ce d by the distancebetween vehicle s, and it also strongly dependents on the values of azim uth angle of arrival. F u rth e r m o re, the value o f X P Dwas changed to a fix e d trend i f changes the values o f the m axim um o f elevation angle o f a rriva l when the azim uth angle o f a rrivalin d iffe re n t values. T h e refore , the proposed multi-antenna geometry channel m odel has introduce d the polarization in V2Vcom m unications and lay the foundation for further research on polarization com m unication

关 键 词：车对车通信 几何信道建模 多天线阵列 交叉极化鉴别 去极化效应 

分 类 号：TN911.2[电子电信—通信与信息系统]