Optimal Antenna Allocation in MIMO Radars with Collocated Antennas

TL;DR

This paper addresses optimal antenna allocation in collocated MIMO radars by deriving performance bounds, formulating an SDP for single targets, and proposing a sampling-based algorithm for multiple targets, improving localization accuracy.

Contribution

It introduces a novel optimization framework for antenna allocation in MIMO radars, including an SDP formulation and a sampling-based method for complex scenarios.

Findings

Optimal antenna allocation improves localization accuracy.

The SDP formulation effectively handles single-target scenarios.

Sampling-based algorithm enhances performance in multiple unresolved target cases.

Abstract

This paper concerns with the sensor management problem in collocated Multiple-Input Multiple-Output (MIMO) radars. After deriving the Cramer-Rao Lower Bound (CRLB) as a performance measure, the antenna allocation problem is formulated as a standard Semi-definite Programming (SDP) for the single-target case. In addition, for multiple unresolved target scenarios, a sampling-based algorithm is proposed to deal with the non-convexity of the cost function. Simulations confirm the superiority of the localization results under the optimal structure.