Improved radar receiver system

DETAILED DESCRIPTION In the receiver in accordance with the principles of the invention, the coherent side lobe cancelling circuits are continually energized and the selected time constant circuit which provides a controlled time constant or controlled length signal, is positioned in the auxiliary channel path to effectively limit the response time of the side lobe blanking comparison.
The side lobe blanking circuits may be mechanized with a logarithmic amplifier and with the selected fast time constant in the auxiliary channel selected to match or be slightly longer than the acquisition time constant of the coherent side lobe cancellers.
Thus, the side lobe blanking circuits are energized at all times, greatly simplifying the operational control of the system and allowing the coherent side lobe canceller to operate substantially independent of the side lobe blanking operation.
It is therefore an object of this invention to provide a radar receiver system that overcomes interfering signals while reliably processing target return signals.
It is a further object of this invention to provide a radar receiver in which side lobe blanking and coherent side lobe cancellation both operate in a substantially independent manner.
It is a still further object of this invention to provide a compatible radar receiver system that allows the side lobe blanking circuits to blank only the leading edge of a noise jammer and to then release control to the coherent side lobe canceller system so that continuous side lobe blanking is not present.
It is another further object of this invention to provide a radar receiver system that reliably overcomes the effect of both continuous jamming and interfering or jamming pulses.
It is another object of this invention to provide a radar receiver system utilizing both side lobe blanking and coherent side lobe cancelling to operate in a substantially independent manner with a minimum of control requirements.