无线航空电子机内通信MIMO信道仿真  

Simulation of MIMO channel for wireless avionics intra-communications

作　　者：卓越东 李峭[1] 卢广山[1] 武俊杰 ZHUO Yuedong;LI Qiao;LU Guangshan;WU Junjie(School of Electronics and Information Engineering,Beihang University,Beijing 100191,China)

机构地区：[1]北京航空航天大学电子信息工程学院,北京100191

出　　处：《航空学报》2024年第8期205-217,共13页Acta Aeronautica et Astronautica Sinica

基　　金：国家自然科学基金(62071023)。

摘　　要：无线航空电子机内通信(WAIC)宽带互连可选用多天线无线局域网(WLAN)。在航空电子设备舱,无线电信号在机舱结构和航电设备架之间的反射是造成多径衰落的主要因素,而且在进行多入多出(MIMO)传输时,不同天线接收信号间的相关性一般不可忽略。根据航电设备架和设备布置的几何位置关系及其材质,建立了三维模型,采用接收球反射角误差法模拟信号在航电舱内的传播路径。针对不同航电设备安装密度条件,分别考虑均匀线性和圆形天线的信号接收情况进行仿真,使用聚类对数据预处理,得到多簇多径信道模型,并使用多径衰落和时延分布描述的航电舱WAIC信道特性,统计分析得到MIMO信道传输矩阵,以及接收机天线间相关性对信道性能的影响。仿真分析表明,当航电设备安装密度大于60%时,信道条件可近似采用完全满载时的信道参数。文中的仿真分析方法为航电设备架附近的MIMO无线传输特性分析和设计提供了参考。Wideband intra-connection for Wireless Avionics Intra-Communications(WAIC)can be achieved by using multi-antenna Wireless Local Area Networks(WLAN).In the avionics cabin,the reflection of signals between the cabin structure and avionics equipment racks is the main factor causing multipath fading.Moreover,the correlation between received signals from different antennas generally cannot be disregarded when Multiple-Input Multiple-Output(MIMO)transmission is performed.In this paper,a three-dimensional model is established according to the arrangement geometric relationship and material properties of the avionics equipment racks and equipment.The signal propagation path in the avionics cabin is simulated using the reflection angle error method of the receiving sphere.For different avionics equipment installation density,simulations are performed considering the reception scenarios of uniform linear and circular antenna signals separately.Cluster-based data preprocessing is used to derive the multi-cluster multipath channel model,as well as the WAIC channel characteristics of the avionics cabin described by multipath fading and time delay distribution.The MIMO channel transmission matrix and the impact of inter-receiver antenna correlation on channel performance are obtained through statistical analysis.The simulation analysis shows that the channel conditions can be approximated using fully loaded channel parameters when the installation density of avionics equipment is greater than 60%.The simulation analysis method proposedcan provide a reference for the analysis and design of MIMO wireless transmission characteristics near avionics equipment racks.

关 键 词：无线航空电子机内通信(WAIC) 多入多出(MIMO) 航电舱 无线局域网(WLAN) 信道仿真 

分 类 号：V243.1[航空宇航科学与技术—飞行器设计] TN92[电子电信—通信与信息系统]