Transmit Beampattern Design with Similarity and Variable Modulus Constraints for MIMO Radar

In this paper, the constrained waveform design of multiple-input multiple-output (MIMO) radar is considered to achieve transmit beampattern assignment. Firstly, we construct a framework that minimizes the spatial integrated sidelobe level ratio (ISLR) as the objective function and constrains the transmit waveforms in terms of amplitude fluctuations and similarity. To solve the resulting non-convex problem, an iterative optimization method based on coordinate descent (CD) is developed by transforming the multivariate problem into multiple univariate problems. Finally, numerical simulation results demonstrate the effectiveness of the proposed method in beampattern assignment and waveform similarity.

1. Introduction

MIMO radar has the advantage of waveform diversity, bene-fiting from greater freedom in terms of transmitting and processing. Beampattern assignment is an effective way to improve the performance of MIMO radar, i.e., to enhance target detection, resource utilization and interference suppression through transmit waveform design.