Abstract: For the coast-ship multi-static ground wave over-the-horizon radar, multiple carrier-frequency signals a
re radiated simultaneously with multiple antennas in its transmitting station, and a “broadcasting” transmitting way is formed. The principles for the design of its transmitting waveforms are presented. Frequency modulated interrupt conti
nuous wave (FMICW) waveforms are adopted in this radar. The relationships of waveform parameters with range resolution, maximum unambiguous range, Dopple walk, and so on are discussed. The receiver station is on the ship and samples of tran
smitted waveforms cannot be received directly, so the conventional analog mixer cannot be used and the method of full digital demodulation of transmitted waveforms in the receiver station is presented. Simulation results show that the waveforms designed are effective.

Key words: ground wave, over-the-horizon radar, multi-static radar, FMICW, waveform design