OFDM Waveform Design with Good Correlation Level and Peak-to-Mean Envelope Power Ratio for the Joint MIMO Radar And Communications

Abstract

In this paper, we focus on the orthogonal frequency division multiplexing (OFDM) waveform design for the joint multipleinput multiple-output radar and communications. An efficient method to simultaneously reduce the integrated sidelobe level (ISL) and peak-to-mean envelope power ratio (PMEPR) of OFDM waveforms is proposed from the radar side, which also guarantees high-quality information transmission for communications. Specifically, we exploit the spectral and phase randomness of waveforms to implement fast-time information embedding, based on which we formulate the design into a solvable nonconvex optimization problem. To solve it, we first rewrite its objective function into a quartic form by exploring the inherent algebraic structures and properties, which is then converted to a new quadratic form that is easy to be dealt with. Moreover, we obtain closed-form solutions at each iteration by means of a series of derivations involving majorization-minimization techniques. Simulation results verify the effectiveness of our method over existing works.