Waveform Design for Beampattern Shaping in 4D-imaging MIMO Radar Systems

In this paper we design transmit beampattern for 4D-imaging automotive radar systems. To this end, we consider spatial- Integrated Sidelobe Level (ISLR) as the design metric and optimize it under continuous and discrete phase constraints. The problem formulation leads to a quadratic fractional programming, where we propose an effective Coordinate Descent (CD) -based method to solve the problem, which minimizes the objective function monotonically. In every iterations of the proposed method, we find global optimum solution for a single variable problem under continuous phase constraint. Under discrete phase constraint, we use Fast Fourier Transform (FFT) to solve problem which is efficient in terms of implementation. Through numerical simulations, we illustrate the performance of our proposed method and compare it with state-of-the art.