초록 ▼

An electronic counter-measure receiver can be colocated with a threat simulator radar, which transmits a radar signal. As a pulsed-Doppler signal, this transmitted radar signal is sampled as a reference signal by the receiver to determine quadrature, coherent matched filter coefficients. A return si

An electronic counter-measure receiver can be colocated with a threat simulator radar, which transmits a radar signal. As a pulsed-Doppler signal, this transmitted radar signal is sampled as a reference signal by the receiver to determine quadrature, coherent matched filter coefficients. A return signal is received and processed with the reference signal as quadrature signal components with the quadrature, coherent matched filter coefficients within a matched filter. The return signal is processed as a first intermediate frequency via a mixer and local oscillator and a second quadrature intermediate frequency via a digital local oscillator and mixer. A fast Fourier transform is performed to determine Doppler information. In a continuous wave transmission for sampling arbitrary but unevenly spaced in time pulses are generated from a pulse generator source internal to the receiver.

대표청구항 ▼

[ That which is claimed is:] [19.]19. 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

[ That which is claimed is:] [19.]19. 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; anda Fast Fourier Transform circuit for processing the matched filter output signal to determine Doppler information.