摘要
城市复杂传播环境导致的多径衰落问题对于无线电辐射源的定位效果有着显著的影响。基于空间谱的测向体制有着对不同波达方向同频信号的测向和多径分离能力。从理论上推导任意阵列流型空间谱估计算法对信号多径效应的适用性,并重点针对圆阵和随机阵列布局,通过仿真验证了多径传播下的性能,定量评估了不同时延和径数对多径测向的影响。为在实际复杂场景下进行高效、可靠的测向工作做出了有益的探索。
Multipath-fading effect under complex urban environment will evidently impact the performance of radio source location.The spatial spectrum-based direction-finding technique is capable of estimating the bearing of co-frequency signals with different angle of arrival,also capable of separating them.First,the applicability of the spatial spectrum estimation algorithm of any array pattern on the multipath effect is derived theoretically,then the performance of spatial spectrum-based technique with circular and arbitrary array patterns are demonstrated under multipath propagation by simulation.Also,the influence on multipath direction finding of different time delays and number of paths are further quantificationally evaluated.The aforementioned study will help to improve the reliability and efficiency of direction-finding under complex scenarios.
作者
崔宏
马杰
CUI Hong;MA Jie(Radio Monitoring Station of Qingdao,Qingdao 266075,China)
出处
《无线电工程》
北大核心
2023年第12期2765-2770,共6页
Radio Engineering
基金
国家自然科学基金重点项目(62031012)。
关键词
多径传播
阵列布局
空间谱测向技术
multipath propagation
array pattern
spatial spectrum-based technique
