Target Localization Methods Based on Iterative Super-Resolution for Bistatic MIMO Radar

Abstract

The direction-of-departure (DOD) and the direction-of-arrival (DOA) are important localization parameters in bistatic MIMO radar. In this paper, we are interested in DOD/DOA estimation of both single-pulse and multiple-pulse multiple-input multiple-output (MIMO) radars. An iterative super-resolution target localization method is firstly proposed for single-pulse bistatic MIMO radar. During the iterative process, the estimated DOD and DOA can be moved from initial angles to their true values with high probability, and thus can achieve super-resolution estimation. It works well even if the number of targets is unknown. We then extend the proposed method to multiple-pulse configuration to estimate target numbers and localize targets. Compared with existing methods, both of our proposed algorithms have a higher localization accuracy and a more stable performance. Moreover, the proposed algorithms work well even with low sampling numbers and unknown target numbers. Simulation results demonstrate the effectiveness of the proposed methods.

Attention Mechanisms in CNN-Based Single Image Super-Resolution: A Brief Review and a New Perspective

“…where φ represents the degradation process, and θ η represents the parameters, including the downscaling kernel and additive noise [37]. The SR solver tries to predict and reconstruct a high-resolution image counterpart x from the input low-resolution image y [38], which can be denoted as:…”

DOA Estimation of a Novel Generalized Nested MIMO Radar with High Degrees of Freedom and Hole-Free Difference Coarray

“…Multiple-input multiple-output (MIMO) radar [1][2][3], with good space, frequency, and waveform diversity characteristics, is widely used in array signal processing [4][5][6] in the last few years. Compared with phased array radar, it has significant advantages in signal detection, parameter estimation [7], direction finding accuracy, spatial resolution [6], and antijamming capabilities, etc. However, the traditional MIMO radar usually adopts a uniform linear array (ULA) as transmitter and receiver, whose interelement spacing is equal to and no more than half wavelength.…”