DOA and Subarray-Interval Estimation for Arbitrarily Distributed UAV Swarm System  

作　　者：Dian Fan Yue Zhu Jia You Zhe Wang Nan Zhong 

机构地区：[1]The China Academy of Information and Communications Technology,Beijing 100191,China [2]The China Academy of Railway Sciences Corporation Limited,Beijing 100081,China

出　　处：《China Communications》2023年第4期102-117,共16页中国通信（英文版）

基　　金：supported by National Natural Science Foundation of China(No.62101601)。

摘　　要：In this paper,DOA and subarray-interval estimation are considered and applied to arbitrarily distributed unmanned aerial vehicle(UAV)swarm system,in which multiple small UAVs containing uniform linear array(ULA)are divided by unknown intervals because of dynamic moving.Three parameters are taken to indicate the steering vector,namely,the direction of arrivals(DOAs)of target users,the intervals of UAVs,and the orientation angles of UAVs.The orientation angles are first estimated with an auxiliary user and the DOAs are obtained through a search free rooting method,despite the intervals among the UAVs.Afterwards,the intervals among UAVs can also be calculated via exhaustive when the number of target users are no less than three.We further develop a low-complex method to reduce the computational complexity during subarray-interval estimation.The deterministic Cramér-Rao bound(CRB)of the DOA,orientation angle and subarray-interval can be inferred in a closed form.Eventually,numerical instances are cited to verify the research results.

关 键 词：distributed subarray DOA orientation angle subarray-interval CRB 

分 类 号：V279[航空宇航科学与技术—飞行器设计]