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Sensors 2014, 14(11), 20165-20187;

Antenna Allocation in MIMO Radar with Widely Separated Antennas for Multi-Target Detection

Department of Electronic Engineering, Tsinghua University, Beijing 100084, China
Author to whom correspondence should be addressed.
Received: 22 July 2014 / Revised: 4 October 2014 / Accepted: 13 October 2014 / Published: 27 October 2014
(This article belongs to the Section Physical Sensors)
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In this paper, we explore a new resource called multi-target diversity to optimize the performance of multiple input multiple output (MIMO) radar with widely separated antennas for detecting multiple targets. In particular, we allocate antennas of the MIMO radar to probe different targets simultaneously in a flexible manner based on the performance metric of relative entropy. Two antenna allocation schemes are proposed. In the first scheme, each antenna is allocated to illuminate a proper target over the entire illumination time, so that the detection performance of each target is guaranteed. The problem is formulated as a minimum makespan scheduling problem in the combinatorial optimization framework. Antenna allocation is implemented through a branch-and-bound algorithm and an enhanced factor 2 algorithm. In the second scheme, called antenna-time allocation, each antenna is allocated to illuminate different targets with different illumination time. Both antenna allocation and time allocation are optimized based on illumination probabilities. Over a large range of transmitted power, target fluctuations and target numbers, both of the proposed antenna allocation schemes outperform the scheme without antenna allocation. Moreover, the antenna-time allocation scheme achieves a more robust detection performance than branch-and-bound algorithm and the enhanced factor 2 algorithm when the target number changes. View Full-Text
Keywords: relative entropy; MIMO radar; antenna allocation; multi-target detection relative entropy; MIMO radar; antenna allocation; multi-target detection
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Gao, H.; Wang, J.; Jiang, C.; Zhang, X. Antenna Allocation in MIMO Radar with Widely Separated Antennas for Multi-Target Detection. Sensors 2014, 14, 20165-20187.

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