Moving target detection in clutter background with FDA-MIMO radar via three-dimensional focus processing

Abstract

Low observable moving target-detection technology under clutter background is the key factor affecting the radar performance. Here, frequency diverse array (FDA) MIMO radar is investigated for low-observable moving target detection. FDA-MIMO radar not only has all the advantages of phased array and MIMO radar, but also can make a two-dimensional joint estimation of the target distance and azimuth. In order to achieve coherent integration for Doppler processing, a novel three-dimensional processing method is proposed, i.e. space-range-Doppler focus (SRDF) processing. It utilises the property of FDA and high-resolution Doppler processing of MIMO. After discussing signal model of FDA-MIMO radar, the flowchart of SRDF-based low-observable moving target detection and estimation is provided. Finally, simulation of moving target detection in clutter background verifies that proposed method has better ability for joint angle-range-Doppler processing with higher resolutions.

Keywords

• object detection
• radar imaging
• Doppler radar
• target tracking
• MIMO radar
• radar signal processing
• joint angle-range-Doppler processing
• clutter background
• FDA-MIMO radar
• three-dimensional focus processing
• low observable moving target-detection technology
• radar performance
• frequency diverse array MIMO radar
• two-dimensional joint estimation
• target distance
• azimuth
• three-dimensional processing method
• space-range-Doppler focus processing
• high-resolution Doppler processing
• SRDF-based low-observable moving target detection