A Novel Radar Waveform Based on Frequency-Phase Joint Coding

Due to the limited modulation manner and the simple construction, the conventional radar signal is usually easy to be intercepted, sorted, identified and forwarded by digital radio frequency memory (DRFM) jammer. This paper proposes a novel radar waveform based on frequency-phase joint coding to increase the ability of low probability of intercept. Firstly, the frequency-phase coded waveform model is constructed and its ambiguity function is analyzed. Secondly, an optimization problem with respect to the continuous phase coded sequence is proposed, to suppress the autocorrelation sidelobe and cross-correlation peak. Finally, the simulation results demonstrate that the optimized frequency-phase code is compatible with autocorrelation and cross-correlation, ensuring the compatible ability of target detection performance and interference countermeasure performance.