Radar, and radar channel separation method and device

The invention discloses a radar, a radar channel separation method and a radar channel separation device. The radar comprises N radar chips which are connected in a cascading mode, each radar chip is provided with m transmitters and n receivers, N is larger than or equal to 2, and N, m and n are all positive integers; the m transmitters and the n receivers on each radar chip share one linear frequency modulation signal generator; frequency deviation exists between center frequencies corresponding to frequency modulation continuous waves generated by the linear frequency modulation signal generators of any two radar chips; a transmitting signal of the transmitter is obtained by modulating a frequency-modulated continuous wave in a preset multiplexing modulation mode, and the receiver adopts the frequency-modulated continuous wave as a dechirping frequency-modulated signal to perform channel separation on a received mixed echo signal. The beat frequency division multiplexing technology is realized on a pluralit