New anti-jamming waveform designing and processing for HF radar

In this paper several typical HF radar waveforms are synthetically analyzed and compared. To improve the low system resolution and weak anti-jamming ability that the conventional HF radar meets with, a new waveform with interrupted spectra is presented. By cutting off the interference band based on the results of the spectrum surveying system before transmitting, the HF radar could make use of some fractional silent spectra. Processing such a waveform using the method of FFT would result in a very high sidelobe and thus may greatly degrade the HF radar's performance. We introduce a new signal processing method based on the least square technique to lower the sidelobe. It is easy for processing and application. Simulation results show that this method could successfully suppress the sidelobe with high resolution in the congested electromagnetic environments.