The present invention relates to a method for a continuous arbitrary waveform radar configured for transmitting and receiving signals over a selected communication band. The method comprises: generating the radar transmit signal with a waveform having a non-monotonic frequency change, modifying the waveform to obtain at least one spectral notch and isolating reception and transmission by cancellation. Each spectral notch at a selectable frequency with a selectable bandwidth, and the waveform is modified to maintain the spectral density of the transmit radar signal.
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