초록 ▼

A method of compensating for transmitter instability of a radar system is provided. The method includes the steps of transmitting at least one electromagnetic pulse and directly measuring at least one characteristic of the transmitted pulse. A comparison is made between the at least one measured cha

A method of compensating for transmitter instability of a radar system is provided. The method includes the steps of transmitting at least one electromagnetic pulse and directly measuring at least one characteristic of the transmitted pulse. A comparison is made between the at least one measured characteristic of the transmitted pulse to a reference pulse characteristic. The results of this comparison are used to generate a complex weight for the at least one electromagnetic pulse. The weight is applied to the received return of the at least one electromagnetic pulse.

대표청구항 ▼

1. A radar system comprising: a transmitter for generating a plurality of electromagnetic pulses defining a pulse burst of a given pulse repetition frequency (PRF) in a coherent interval;a receiver;an antenna operatively coupled to the transmitter and the receiver; anda first processor operatively c

1. A radar system comprising: a transmitter for generating a plurality of electromagnetic pulses defining a pulse burst of a given pulse repetition frequency (PRF) in a coherent interval;a receiver;an antenna operatively coupled to the transmitter and the receiver; anda first processor operatively connected to the output of the receiver, the first processor is configured to: measure the plurality of pulses output from the transmitter in the coherent interval,compare the measured pulses output from the transmitter to a reference pulse, the reference pulse being the last pulse in the coherent interval,generate a compensation factor representing the difference between at least one of the measured pulses output from the transmitter and the reference pulse, andapply the compensation factor to a return signal corresponding to the measured transmitter pulse output. 2. The system of claim 1, wherein the receiver comprises an analog to digital converter. 3. The system of claim 2, further comprising a second processor configured to control the on and off timing of the analog to digital converter. 4. The system of claim 3, wherein the second processor is configured to turn the analog to digital converter on during at least a portion of the time the transmitter is generating the pulse output. 5. The system of claim 1, wherein the pulse output of the transmitter is provided to the receiver via at least one of a direct coupling, antenna reflection, and power leakage between operating channels of the transmitter and the receiver. 6. The system of claim 1, wherein the step of generating a compensation factor includes taking the complex conjugate of the peak of the measured pulse output of the transmitter. 7. The system of claim 1, wherein the steps of measuring the pulses output from the transmitter, comparing the measured pulse output of the transmitter to a reference pulse, generating a compensation factor representing the difference between the measured pulse output and the reference pulse, and applying the compensation factor to a return signal corresponding to the measured transmitter pulse output are made for each pulse output by the transmitter. 8. A method of compensating for transmitter instability of a radar system comprising: transmitting a plurality of electromagnetic pulses defining a pulse burst of a given pulse repetition frequency (PRF) in a coherent interval;measuring at least one characteristic of a transmitted pulse in the coherent interval;comparing the at least one measured characteristic of the transmitted pulse to a reference pulse characteristic, the reference pulse characteristic being the last pulse in the coherent pulse interval;generating a complex weight corresponding to the at least one electromagnetic pulse; and applying the complex weight to a received return corresponding to the measured transmitted electromagnetic pulse. 9. The method of claim 8, further comprising the step of receiving the transmitted pulse with a receiving channel of the radar system. 10. The method of claim 9, wherein the transmitted pulse is received via at least one of a direct coupling, antenna reflection, and power leakage between a transmitting channel and the receiving channel of the radar system. 11. The method of claim 10, wherein the receiving channel comprises an analog to digital converter. 12. The method of claim 11, further comprising the step of activating the analog to digital converter during at least a portion of the time the transmitting channel is generating the electromagnetic pulse. 13. The method of claim 8, wherein the step of generating a compensation factor includes taking the complex conjugate of the peak of the measured transmitted pulse. 14. The method of claim 8, wherein the steps of measuring at least one characteristic of the transmitted pulse, comparing the at least one measured characteristic of the transmitted pulse to a reference pulse characteristic, generating a complex weight corresponding to the at least one measured electromagnetic pulse, and applying the complex weight to a received return corresponding to the measured transmitted electromagnetic pulse are made for each transmitting pulse of the transmission channel. 15. A radar system comprising: a transmitter for generating an electromagnetic pulse;a receiver;a plurality of Doppler filters coupled to the output of the receiver;an antenna operatively coupled to the transmitter and the receiver; anda first processor operatively connected to the output of the receiver, the first processor is configured to: measure the pulse output from the transmitter,compare the measured pulse output of the transmitter to a reference pulse,generate a compensation factor representing the difference between the measured pulse output and the reference pulse, andaltering coefficients of the Doppler filters using the compensation factor. 16. The system of claim 15, wherein the reference pulse comprises the last pulse in a coherent interval. 17. The system of claim 15, wherein the step of generating a compensation factor includes taking the complex conjugate of the peak of the measured pulse output of the transmitter. 18. The system of claim 15, further comprising a second processor configured to control the on and off timing of an analog to digital converter of the receiver. 19. The system of claim 18, wherein the second processor is configured to turn the analog to digital converter on during at least a portion of the time the transmitter is generating the pulse output. 20. The system of claim 15, wherein the steps of measuring the pulse output from the transmitter, comparing the measured pulse output of the transmitter to a reference pulse, generating a compensation factor representing the difference between the measured pulse output and the reference pulse, and altering coefficients of the Doppler filters using the compensation factor are made for each pulse output by the transmitter.