Processing arrangement for pulse compression radar

Claim 1

In a phase-coded pulse compression radar transmitting an N-bit sequence of pulses to provide an aperiodic coded signal, an arrangement for processing echo signals to suppress selected range sidelobes, such arrangement comprising: (a) a waveform generator, actuable during each interval between coded transmitted signals, for forming a first set of N+M digital numbers, such set consituting a reference code representative of the complete N-bit sequence of pulses followed by the first M bits of such sequence, where M is an integer, less than N, corresponding with the number of sidelobes to be cancelled; (b) analog-to-digital converter means, responsive to the echo signal and signals in the range sidelobes, for forming a second set of digital numbers representing the echo signal and signals in all range sidelobes; and (c) digital correlator means, responsive digit by digit, to the first and the second set of digital numbers to produce a third set of digital numbers representative of the echo signal and the signals in all range sidelobes, less the signals in the selected range sidelobes.