Radar receiver having matched filter processing

A method for operating a radar device comprising the steps of:

• sampling a continuous wave radar signal by arbitrary but evenly spaced in time pulses generated from a pulse generator source that is internal to the radar receiver to determine quadrature, coherent matched filter coefficients;
• receiving a return signal within a radar receiver of the radar device;
• processing the return signal as a first intermediate frequency via a mixer and local oscillator, and a second quadrature intermediate frequency via a digital local oscillator and mixer;
• processing within a matched filter of the radar receiver both the return and reference signals as quadrature signal components and matched filter coefficients;
• and
• performing a Fast Fourier Transform to determine Doppler information.

A radar receiver comprising:

• a sampling circuit for sampling a transmitted pulsed-Doppler radar signal to determine quadrature, coherent matched filter coefficients based on the transmitted pulse timing;
• a first mixer and local oscillator for processing a return signal as a first intermediate frequency;
• a digital drop receiver circuit having a second mixer and local oscillator for producing a second intermediate frequency signal as a quadrature signal;
• a matched filter for receiving the second intermediate frequency signal and the coherent matched filter coefficients to convolve the signals and provide coherent demodulation;
• and
• a Fast Fourier Transform circuit for processing the matched filter output signal to determine Doppler information.

A radar receiver comprising:

• a sampling circuit for sampling a transmitted continuous wave radar signal to determine quadrature, coherent matched filter coefficients based on arbitrary but evenly spaced in time pulses generated from a pulse generator source that is internal to the radar receiver;
• a first mixer and local oscillator for processing a return signal as a first intermediate frequency;
• a digital drop receiver circuit having a second mixer and local oscillator for producing a second intermediate frequency signal as a quadrature signal;
• a matched filter for receiving the second intermediate frequency signal and the coherent matched filter coefficients to convolve the signals and provide coherent demodulation;
• and
• a Fast Fourier Transform circuit for processing the matched filter output signal to determine Doppler information.