Waveform Design for Integrated Radar and Communication Based on Random Stepped Frequency LFM

• 1、Information Science and Engineering School, Hunan University, Changsha 410012

Abstract：Integrated design of radar communication can realize the sharing of electronic resources and the waveform design compatible with radar communication is the key technology. A compatible waveform based on random stepped-frequency LFM (RSF-LFM) signal, which fully utilizes the LFM signal bandwidth, and each LFM signal period contains N subcarriers is proposed to achieve a higher communication rate for radar waveforms. In view of the influence of communication modulation terms on the radar detection performance of the waveform, this paper introduces the information modulation frequency expansion coefficient to control, and then derives the spectrum and ambiguity function (AF) of the waveform. Finally, the communication information demodulation scheme is proposed, and the demodulated signal can be directly subjected to FFT transformation without bandpass filtering, which is simple to implement. Simulation experiments and performance comparison analysis prove that this waveform not only has higher resolution, but also meets the requirements of large-scale data transmission.

Keywords： Information processing Radar communication integration；LFM Frequency expansion factor AF