Radar system and method
First Claim
1. A radar system for discriminating between sources of radar interference and targets of interest, the system comprising:
- a static transmitter configured to transmit radar signals persistently into a volume of space without movement of a region of illumination by electronic or mechanical scanning;
a multi-beam receiver configured to receive return signals of said radar signals returned from within said volume of space; and
a processor configured to process the return signals to discriminate between return signals returned from a first object and return signals returned from a second object based on respective data representing an evolution of the spectral spread of said Doppler components for each object over time, wherein said return signals from said objects comprise Doppler components exhibiting a spectral spread of Doppler components;
wherein the processor is configured to maintain historical persistently-acquired data from the whole of said volume of space, including persistently-acquired phase andpersistently-acquired amplitude data associated with said return signals over time, and to process the return signals to discriminate between return signals returned from a first object and return signals returned from a second object based on said stored historical, persistently-acquired phase and amplitude data; and
wherein the processor is further configured to determine conformity of an evolution of the spectral spread of said Doppler components with a model derived from the historical data in terms of historic signal characteristics stored by the processor.
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Accused Products
Abstract
A radar system for discriminating between sources of radar interference and targets of interest. The system includes a transmitter for transmitting radar signals into a region, a receiver for receiving return signals of the radar signals returned from within the region, and a processor for processing the return signals to discriminate between return signals returned from a first object and return signals returned from a second object where the return signals from the second object comprise both zero and non-zero Doppler components and interfere with the return signals from the first object. The radar system is operable for discriminating between the return signals when the return signals are received at a distance from the second object which is less than a proximity limit based on the geometry of the object.
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Citations
12 Claims
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1. A radar system for discriminating between sources of radar interference and targets of interest, the system comprising:
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a static transmitter configured to transmit radar signals persistently into a volume of space without movement of a region of illumination by electronic or mechanical scanning; a multi-beam receiver configured to receive return signals of said radar signals returned from within said volume of space; and a processor configured to process the return signals to discriminate between return signals returned from a first object and return signals returned from a second object based on respective data representing an evolution of the spectral spread of said Doppler components for each object over time, wherein said return signals from said objects comprise Doppler components exhibiting a spectral spread of Doppler components; wherein the processor is configured to maintain historical persistently-acquired data from the whole of said volume of space, including persistently-acquired phase and persistently-acquired amplitude data associated with said return signals over time, and to process the return signals to discriminate between return signals returned from a first object and return signals returned from a second object based on said stored historical, persistently-acquired phase and amplitude data; and wherein the processor is further configured to determine conformity of an evolution of the spectral spread of said Doppler components with a model derived from the historical data in terms of historic signal characteristics stored by the processor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method, performed in a radar system, of discriminating between sources of radar interference and targets of interest, the method comprising:
- persistently transmitting radar signals into a volume of space without movement of a region of illumination by electronic or mechanical scanning;
receiving return signals of said radar signals returned from within said volume of space; and
processing the return signals to discriminate between return signals returned from a first object and return signals returned from a second object based on respective data representing an evolution of the spectral spread of said Doppler components for each object over time, wherein said return signals from said objects comprise Doppler components exhibiting a spectral spread of Doppler components;
wherein processing comprises maintaining persistently-acquired historical data from the whole of said volume of space, including persistent phase and amplitude data associated with said return signals over time, and processing the return signals to discriminate between return signals returned from a first object and return signals returned from a second object based on said stored, historical, persistently-acquired phase and amplitude data, and wherein said processing further comprises determining a conformity of an evolution of the spectral spread of said Doppler components with a model derived from the historical data in terms of historic signal characterisitics stored by the processor.
- persistently transmitting radar signals into a volume of space without movement of a region of illumination by electronic or mechanical scanning;
Specification