Two Dimensional Forward-Looking Missile-Borne Radar Imaging Based on Vortex Electromagnetic Waves

Taoli Yang,Xingyu Lu,Wei Huang

doi:10.1109/access.2020.3042529

Abstract

In this article, a novel two-dimensional (2D) imaging scheme for forward-looking missile-borne radar systems is proposed, where the vortex electromagnetic (EM) waves with different orbital angular momentum (OAM) modes are transmitted. First, the vortex EM waves's radar imaging model is established. Then, two processing algorithms, i.e. the FFT and the sparse recovery algorithms, are proposed. Finally, the simulation results confirm the proposed algorithms. Compared with the traditional missile-borne radar, the OAM-based system can not only achieve the slant range resolution, but also the azimuth resolution. Besides, be different from the traditional 2D synthetic aperture radar (SAR), the azimuth resolution of the novel system is independent from the Doppler bandwidth and can be obtained even at the forward-looking mode.

Highlights

Automatic target examination, recognition and tracking is the main development direction in equipments of modern military weapons, and missile is one of the most important weapons
For a missile homing guidance system, the tracking data and guidance signals can be provided by a radar system
The reconstructed azimuth angular position, the azimuth angular resolution and the azimuth pulse side-lobe ratio (PSLR) of the targets are displayed in Table.2, Table.3, and Table.4, respectively, where FFT16 and FFT256 represent the processing results using Fast Fourier transform (FFT) method with 16 orbital angular momentum (OAM) modes and 256 OAM modes, respectively, and Sparse16 denotes the sparse method with 16 OAM modes

Summary

INTRODUCTION

Recognition and tracking is the main development direction in equipments of modern military weapons, and missile is one of the most important weapons. Prior art missile-borne radar systems have been designed to obtain high discrimination in angle and in range by monopulse of "beam splitting" methods. T. Yang et al.: Two Dimensional Forward-Looking Missile-Borne Radar Imaging Based on Vortex Electromagnetic Waves achieved azimuth resolution is coarser. A novel OAM-based forward-looking missile-borne radar system is proposed to achieve the 2D image of the interested targets, as well as two processing methods. The first one is that it can achieve two dimensional images of the interested targets, while the traditional missile-borne radar is designed to obtain high discrimination only in range.

SIGNAL MODEL

SPARSE RECOVERY METHOD

35 GHz 150 MHz

EXPERIMENT

PERFORMANCE ANALYSIS

CONCLUSION