A digital moving target detector in which the transmitter feeds a Butler matrix connecting a series of antennas. On reception the received signals are fed to a sample and store circuit, fed to a series of scaling multipliers, and then summed in N groups with each group including samples corresponding to range bins. The groups are stored at every pulse and then multiplied with a digital reference waveform and summed. Also the received signals can be converted to a Fourier Transform by an FFT algorithm, multiplied by correlation complex numbers in sequence and then added to corresponding products of corresponding sequences, the inverse Fourier Transform thereof represents radar outputs.
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