Frequency Diverse Array MIMO Radar Adaptive Beamforming with Range-Dependent Interference Suppression in Target Localization

Abstract EN

Conventional multiple-input and multiple-output(MIMO) radar is a flexible technique which enjoys the advantagesof phased-array radar without sacrificing its mainadvantages.

However, due to its range-independent directivity,MIMO radar cannot mitigate nondesirable range-dependentinterferences.

In this paper, we propose a range-dependentinterference suppression approach via frequency diverse array(FDA) MIMO radar, which offers a beamforming-based solutionto suppress range-dependent interferences and thus yields muchbetter DOA estimation performance than conventional MIMOradar.

More importantly, the interferences located at the sameangle but different ranges can be effectively suppressed by therange-dependent beamforming, which cannot be achieved byconventional MIMO radar.

The beamforming performance ascompared to conventional MIMO radar is examined by analyzingthe signal-to-interference-plus-noise ratio (SINR).

The Cramér-Rao lower bound (CRLB) is also derived.

Numerical resultsshow that the proposed method can efficiently suppress range-dependentinterferences and identify range-dependent targets.

It is particularly useful in suppressing the undesired stronginterferences with equal angle of the desired targets.