As frequency diverse array (FDA) introduces range-angle-dependent beamforming, it is capable to handle the range-dependent interference. However, the underlying independent and identically distributed condition of the interference is violated, which induces performance degradation of jamming suppression. In this paper, we propose a robust adaptive beamforming approach based on direct data domain technique for the multiple-input multiple-output (MIMO) radar with FDA as transmit array, referred to as FDA-MIMO. In this approach, the data is smoothed once in transmit and receive domains to mitigate the influence of target, which results in three homogeneous samples. In the sequel, the data collected from different pulses is utilized as secondary data. Basically, the interference can be isolated from the target signal in the joint transmit and receive domains of the FDA-MIMO radar. Simulation results demonstrate the effectiveness of the proposed approach.
['Jingwei Xu', 'Yanhong Xu', 'Guisheng Liao']
Direct data domain based adaptive beamforming for FDA-MIMO radar