초록 ▼

A system for suppressing clutter in a radar system is provided. The system includes an antenna configured to receive radar signals containing clutter and a digital receiver adapted to convert the radar signals received by the radar arrays to complex I/Q samples. These I/Q samples are provided to a D

A system for suppressing clutter in a radar system is provided. The system includes an antenna configured to receive radar signals containing clutter and a digital receiver adapted to convert the radar signals received by the radar arrays to complex I/Q samples. These I/Q samples are provided to a Doppler filter bank comprising a plurality of Doppler filters for filtering the pulse compressed data into Doppler bins representative of range values according to Doppler frequency. The system further includes at least one processor for comparing the output of each of the plurality of Doppler filters types to respective background clutter maps, and identifying the Doppler filter which outputs the radar return signal with the greatest magnitude over the clutter map. Once identified, target detection operations may be performed on the output of the identified Doppler filter.

대표청구항 ▼

1. A system for suppressing clutter when detecting objects of interest, comprising: an antenna configured to receive radar signals containing clutter;a digital receiver adapted to convert the received analog radar signals to complex digital received data;a single Doppler filter bank constituted by a

1. A system for suppressing clutter when detecting objects of interest, comprising: an antenna configured to receive radar signals containing clutter;a digital receiver adapted to convert the received analog radar signals to complex digital received data;a single Doppler filter bank constituted by a plurality of Doppler filters matched to various clutter types for filtering the received data into Doppler bins representative of range values according to Doppler frequency and clutter type;at least one processor configured to: compare the output of each of the plurality of Doppler filters to a respective background clutter map;based on said comparison, identify the Doppler filter whose radar return signal output has the greatest magnitude across frequency and filter type over the clutter map; andperform target detection of objects of interest on the output of the identified Doppler filter. 2. The system of claim 1, wherein the processor utilizes only the single Doppler filter bank for filtering the received data for at least weather type clutter and ground type clutter. 3. The system of claim 1, wherein processing is performed simultaneously without bank switching. 4. The system of claim 1, wherein the at least one processor identifies the Doppler filter which outputs the radar return signal with the greatest magnitude for every one of a range, azimuth and Doppler bin. 5. The system of claim 1, wherein the plurality of Doppler filters of the single Doppler filter bank include Doppler filters matched to at least ground type clutter and weather type clutter. 6. The system of claim 1, wherein the plurality of Doppler filters of the single Doppler filter bank include at least fill pulse filters and no fill pulse filters. 7. The system of claim 1, wherein the at least one processor automatically identifies the Doppler filter optimized for cancelling clutter contained in the radar return signal at every range and azimuth location. 8. A method for suppressing clutter when detecting objects of interest in a detection system comprising: transmitting at least one electromagnetic signals;receiving reflected return signals from the transmitted signal;Doppler filtering the return signals in a single Doppler filter bank comprising a plurality of Doppler filters matched to various clutter types;comparing the output of each of the plurality of Doppler filters to a respective background clutter map;identifying the Doppler filter which outputs the radar return signal with the greatest magnitude across frequency and filter type over the clutter map; andperforming target detection on the output of the identified Doppler filter. 9. The method of claim 8, wherein only the single Doppler filter bank is used for filtering the received data for at least ground type clutter and weather type clutter. 10. The method of claim 8, wherein the step of identifying the Doppler filter comprises identifying the Doppler filter which outputs the radar return signal with the greatest magnitude for every one of a range, azimuth and Doppler bin. 11. The method of claim 8, wherein the plurality of Doppler filters of the single Doppler filter bank include Doppler filters matched to at least ground type clutter and weather type clutter. 12. The method of claim 8, wherein the plurality of Doppler filters of the single Doppler filter bank includes fill pulse filters and no fill pulse filters. 13. The method of claim 8, wherein the at least one processor automatically identifies the Doppler filter optimized for cancelling clutter contained in the radar return signal at every range and azimuth location.