A new type quasi-continuous radar which take a double linearly frequency interrupted modulation signal with large operating duty as the transmitting wave is proposed in order to solve the range-velocity coupling problem in the LFM-CW radar and the short-range blind area problem in LFM pulse radar. In this quasi-continuous radar

two LFM signals whose spectrums are not overlapped are transmitted alternately in the transmitting pulse

and the estimated values of the range and the velocity can be obtained within a pulse repetition interval in the receiver by the separating the transmitted signals

Stretch processing

correlation processing

FFT and the motion compensating. In this paper

the signal model and the principle of range-velocity decoupling are firstly given. And then its performance is analyzed. Finally

some key problems to be solved are discussed in the radar.