Coherent radar detection using non-coherent architecture
AssigneeHoneywell International Inc.
InventorsManuel Richey, Timothy Gibson
Life of this patent
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Abstract
In a radar system having a transmitter that produces pulses to be radiated by an antenna and a receiver that detects target information, complex demodulation is performed on an attenuated and limited waveform of the transmitter produced pulse. A matched filter is generated responsive to the complex demodulated waveform that is a time reversed conjugate image of the waveform corresponding to the produced pulse. Complex demodulation is performed on the return signal received by the receiver corresponding the produced pulse and the complex demodulated return signal is correlated with the matched filter that corresponds to the time reversed conjugate image of the waveform of the produced pulse.
Claims51
A receiver in a radar system having a transmitter for producing pulses to be radiated by an antenna, the receiver comprising:
- means responsive to a transmitter produced pulse for performing complex demodulation of a waveform corresponding to the produced pulse;
- means responsive to the complex demodulated waveform corresponding to the produced pulse for forming a filter representative of the pulses produced by the transmitter;
- means for receiving a return signal corresponding to each pulse produced by the transmitter from the antenna;
- means for performing complex demodulation of the return signal;
- and
- means for correlating the complex demodulated return signal with the filter representative of the pulses produced by the transmitter.
A method of detecting a target in a radar receiver of a radar system having a transmitter producing pulses for radiation by an antenna, the method comprising the steps of:
- performing a complex demodulation of a waveform corresponding to the pulse produced by the transmitter in the receiver;
- forming a filter representative of the pulse produced by the transmitter responsive to the complex demodulated waveform in the receiver;
- receiving a return signal corresponding to each pulse produced by the transmitter from the antenna;
- performing complex demodulation of the return signal;
- and
- correlating the complex demodulated return signal with the filter representative of the pulses produced by the transmitter.
A radar system comprising:
- an antenna;
- a transmitter for producing pulses to be radiated by the antenna;
- a receiver for detecting target information from return signals responsive to the pulses produced by the transmitter;
- in the receiver:
- means responsive to the pulses produced by the transmitter for performing complex demodulation of a waveform corresponding to a produced pulses;
- means responsive to the complex demodulated waveform corresponding to the produced pulse for forming a filter representative of the pulses produced by the transmitter;
- means for receiving a return signal corresponding to each pulse produced by the transmitter from the antenna;
- means for performing complex demodulation of the return signal;
- and
- means for correlating the complex demodulated return signal with the filter representative of the pulses produced by the transmitter.
In a receiver of a radar system having a transmitter producing pulses for radiation by an antenna, a computer usable medium having computer readable program code units embodied therein comprising:
- a first program code unit for performing a complex demodulation of a waveform corresponding to a pulse produced by the transmitter;
- a second program code unit for forming a filter representative of the pulses produced by the transmitter responsive to the complex demodulated waveform;
- a third program code unit for receiving a return signal corresponding to each pulse produced by the transmitter from the antenna;
- a fourth program code unit for performing complex demodulation of the received return signal;
- and
- a fifth program code unit for correlating the complex demodulated return signal with the filter representative of the pulses of produced by the transmitter.
A receiver in a radar system having a transmitter for producing pulses to be radiated by an antenna, the receiver comprising:
- a signal receiving unit including a coupler for receiving the pulse produced by the transmitter and a coupler for receiving from the antenna a return signal corresponding to each pulse produced by the transmitter;
- a signal processor comprising:
- a demodulator processing unit responsive to a transmitter produced pulse for performing complex demodulation of a waveform corresponding to the produced pulse;
- a filter processing unit responsive to the complex demodulated waveform corresponding to the produced pulse for forming a filter representative of the pulses produced by the transmitter;
- a demodulator processing unit for performing complex demodulation of the return signal;
- and
- a correlating processing unit for correlating the complex demodulated return signal with the filter representative of the pulses produced by the transmitter.
A radar system comprising:
- an antenna;
- a transmitter for producing pulses to be radiated by the antenna;
- a receiver for detecting target information from return signals responsive to the pulses produced by the transmitter;
- in the receiver:
- a signal receiving unit including a coupler for coupling the pulse produced by the transmitter to the receiver and a coupler for receving a return signal corresponding to each produced pulse from the antenna;
- and
- a signal processor comprising:
- a demodulating processing unit responsive to the pulses produced by the transmitter for performing complex demodulation of a waveform corresponding to a produced pulses;
- a filter processing unit responsive to the complex demodulated waveform corresponding to the produced pulse for forming a filter representative of the pulses produced by the transmitter;
- a demodulating processing unit for performing complex demodulation of the return signal;
- and
- a correlating processing unit for correlating the complex demodulated return signal with the filter representative of the pulses produced by the transmitter.
Dependencies are inferred from the claim text.