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Abstract
En 中文
In this paper, DOA and subarray-interval estimation are considered and applied to arbitrarily distributed unmanned aerial vehicle (UAV) swarm sys-tem, in which multiple small UAVs containing uni-form linear array (ULA) are divided by unknown in-tervals because of dynamic moving. Three parame-ters are taken to indicate the steering vector, namely, the direction of arrivals (DOAs) of target users, the in-tervals of UAVs, and the orientation angles of UAVs. The orientation angles are first estimated with an aux-iliary 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 tar-get users are no less than three. We further develop a low-complex method to reduce the computational complexity during subarray-interval estimation. The deterministic Crame ' r-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.
Keywords:
distributed subarray
DOA
orientation angle
subarray-interval
CRB
Journal
IF:
3.1
Papers:
1.9K
Citations:
5.0K