Sparse processing with range migration compensation capability for a frequency agile orthogonal frequency division multiplexing waveform

Digital-to-analogue and analogue-to-digital in a digital array radar limits the transmission reception of instantaneous broadband signals (IBSs), which makes it technical bottleneck for to obtain an high-resolution range profile (HRRP). A frequency-agile orthogonal frequency division multiplexing (OFDM) waveform with high repetition pulse train is proposed, uses multiple narrowband OFDM realise large bandwidth so that can easily working mode. This hopping signal have characteristics HRRP formation low interception simultaneously. To solve problem migration caused by high-speed moving targets, two-stage sparse processing algorithm compensation capability (FS-RMCSP) slow time fast domains proposed. By constructing dictionary matrix operator according phase offset target echo, proposed complete resolution, accurately recover range-Doppler parameters target, coherent accumulation echo. The simulation results show this equivalent IBS tracking Compared conventional algorithm, FS-RMCSP significantly improves performance reconstruction scene targets.