초록 ▼

A method of processing radar returns derived from a new radar waveform. The method processes radar returns derived from transmitting the radar waveform to provide simultaneous matched processing and range profiling of different size objects in the presence of clutter. In the present method, radar re

A method of processing radar returns derived from a new radar waveform. The method processes radar returns derived from transmitting the radar waveform to provide simultaneous matched processing and range profiling of different size objects in the presence of clutter. In the present method, radar returns are digitized and processed to produce pulse compressed radar returns having a predetermined (169:1) pulse compression ratio. A pulse to pulse fast Fourier transform on each RF step is performed on the pulse compressed radar returns. The Fourier transformed radar returns are then simultaneously processed by three processing channels, one each for ships, boats and submarines to provide detection of the different size objects. The waveform permits concurrent detection, discrimination, and high resolution range imaging of detected objects within a single dwell, using a single waveform. Thus, a radar search mode using the waveform integrates several search functions without increasing search frame time.

대표청구항 ▼

A method of processing radar returns derived from a predetermined radar waveform that permits simultaneous match processing and profiling of different size targets, said method comprising the steps of: transmitting radar signals having a predetermined radar waveform; digitizing radar returns from ta

A method of processing radar returns derived from a predetermined radar waveform that permits simultaneous match processing and profiling of different size targets, said method comprising the steps of: transmitting radar signals having a predetermined radar waveform; digitizing radar returns from targets; pulse compressing the digitized radar returns; pulse to pulse Fourier transforming the pulse compressed radar returns on each RF step; simultaneously processing the Fourier transformed radar returns by first, second, and third processing channels that correspond to targets of different sizes; and wherein: in the first processing channel, the Fourier transformed radar returns are processed by: magnitude detecting the Fourier transformed radar returns from each of the RF steps; noncoherently integrating the magnitude detected returns over the RF steps in the waveform; estimating the noise content in the noncoherently integrated returns; thresholding the returns to strip off noise contained therein; coherently integrating the thresholded returns over the dwell time to provide fine Doppler resolution; range profiling the coherently integrated returns; and displaying the range profiled returns; in the second processing channel, the Fourier transformed radar returns are processed by: dividing the RF steps into groups; coherently integrating the radar returns within each group of RF steps over the RF steps in the waveform; magnitude detecting the coherently integrated returns; noncoherently integrating the magnitude detected returns over the RF groups in the waveform; estimating the noise content in the noncoherently integrated returns; thresholding the returns to strip off noise contained therein; coherently integrating the thresholded returns over the dwell time to provide fine Doppler resolution; range profiling the coherently integrated returns; and displaying the range profiled returns; and in the third processing channel, the Fourier transformed radar returns are processed by: coherently integrating the radar returns over the RF steps in the waveform; magnitude detecting the coherently integrated returns; estimating the noise content 23 in the magnitude detected returns; thresholding the returns to strip off noise contained therein; processing the thresholded returns to recognize patterns therein and correlate the patterns to known targets; and displaying the recognized and correlated returns.