运动平台分布式功率合成效能分析  

Efficiency analysis of distributed power combining for mobile platform

作　　者：郭文博[1,2] 杜嘉鑫 杨健 严牧 赵宏志[1,2] 邵士海 GUO Wenbo;DU Jiaxin;YANG Jian;YAN Mu;ZHAO Hongzhi;SHAO Shihai(Nation Key Laboratory of Wireless Communications,University of Electronic Science and Technology of China,Chengdu 611731,China;Laboratory of Electromagnetic Space Cognition and Intelligent Control,Beijing 100191,China;School of Cyberspace Science and Technology,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]电子科技大学通信抗干扰全国重点实验室,四川成都611731 [2]电磁空间认知与智能控制技术实验室,北京100191 [3]北京理工大学网络空间安全学院,北京100081

出　　处：《通信学报》2023年第11期143-150,共8页Journal on Communications

基　　金：国家自然科学基金资助项目(No.U19B2014,No.61601071,No.61671091)。

摘　　要：针对运动平台的位置摄动问题,分析了位置摄动对分布式功率合成效能影响,建立了存在位置摄动的分布式功率合成模型,推导了平均远场波束图、互补累积分布函数表达式以及3 dB波束宽度近似表达式。理论分析和数值仿真表明,位置摄动加剧会导致分布式功率合成的平均远场波束图、峰值功率、3 dB波束宽度和互补累积分布函数不断恶化。当位置摄动达到信号波长的9%时,运动平台进行分布式功率合成后的信号峰值功率下降到其理论上限的90%。Aiming at the position perturbation of mobile platform,the impact of position perturbation was analyzed on distributed power combining efficiency.The model of distributed power combining with position perturbation was established,and the average far-field beampattern,complementary cumulative distribution function(CCDF)expressions and the approximate expression of 3 dB beamwidth were derived.The results show that intensified position perturbation can lead to continuous deterioration of the average far-field beampattern,peak power,3 dB beamwidth,and CCDF of distributed power combining.When the position perturbation reaches 9%of the signal wavelength,the signal peak power of the mobile platform after distributed power combining decreases to 90%of its theoretical upper limit.

关 键 词：分布式功率合成 运动平台 虚拟天线阵列 位置摄动 

分 类 号：TN92[电子电信—通信与信息系统]