Optimization-Based Discontinuous Observation Strategy for Micro-Doppler Signature Extraction of Space Cone Targets

Optimization-Based Discontinuous Observation Strategy for Micro-Doppler Signature Extraction of Space Cone Targets

Blog Article

In order to obtain relatively complete micro-Doppler (m-D) signatures of space precession cone targets, at least one precession period of dwell time is always required.In practice, most of the space cone targets Bottles do precession with a relativity low frequency (i.e.

, 0.5-1 Hz), which means second-level dwell time is necessary.However, second-level dwell time is prohibitive in terms of radar resource consumption, especially as radar has to face the challenges of multi-targets and multi-tasks.

To tackle this problem, we conduct m-D signature extraction based on a discontinuous-observation-based strategy named multi-short-dwell observation (MSDO).Specifically, by incorporating the time-frequency information, the extraction Cramér-Rao bounds give reliable bounds for the performance of the m-D signature extraction.Therefore, they are derived and used as optimization criterions for optimizing the time parameters involved in the MSDO.

A cost function is established to minimize the time resource occupation ratio such that the extraction precision requirement is met.The m-D signature extraction is implemented based on the optimized MSDO parameters in which the real sinusoid estimator and the least square estimator are adopted.The Racquet Sports - Squash simulation results illuminate the effectiveness of the proposed method.