US 5,734,389 A · Radar system and method of operating same

Abstract

A proximity fuze radar system is described including a transmitter for transmitting a signal modulated by a pseudo-random noise code signal and a receiver for receiving signals including the modulated signal reflected by an object or target. The proximity fuze radar system further includes delay circuitry for delaying in time the pseudo-random noise code signal for providing a delayed noise code signal and circuitry for correlating a near range portion of the received signals with the delayed noise code signal and for providing base band signals. The proximity fuze radar system still further includes suppression circuitry for correlating a longer range portion of the received signals with the delayed noise code signal and for providing a rejection signal for summing the base band signals with the rejection signal to reduce the signal level of undesired signals. With such an arrangement, a radar system is provided having less susceptibility to undesired signals.

Claims14

Dependent claims

A radar system comprising:

(a) means, responsive to a first portion of received signals and a first delayed noise code signal, for correlating the first portion of received signals with the first delayed noise code signal and for providing a plurality of desired and undesired signals having a signal level;
(b) means, responsive to a second portion of received signals and a second delayed noise code signal, for correlating the second portion of received signals with the second delayed noise code signal and for providing a rejection signal;
and
(c) means, responsive to the plurality of desired and undesired signals and the rejection signal, for summing the desired and undesired signals with the rejection signal for reducing the signal level of undesired signals.

1 more element

A proximity fuze radar system comprising:

(a) means for transmitting a modulated signal modulated by a pseudo-random noise code signal;
(b) means for receiving signals including the modulated signal reflected by an object for providing received signals;
(c) means for delaying in time the pseudo-random noise code signal for providing a first and a second delayed noise code signal;
(d) means for correlating a first portion of the received signals with the first delayed noise code signal and for providing desired and undesired baseband signals having a signal level;
(e) means for correlating a second portion of the received signals with the second delayed noise code signal and for providing a rejection signal;
and
(f) means for summing the baseband signals with the rejection signal for reducing the signal level of undesired baseband signals.

4 more elements

Dependencies are inferred from the claim text.

Radar system and method of operating same

Life of this patent

Radar system and method of operating same

Life of this patent

Abstract

Claims14