| 摘要 |
The invention relates to a method of interference suppression in a radar system (10) and also to a system (10) operating according to the method. The system (10) incorporates a first antenna (40) and associated electronic circuits for emitting interrogating radar radiation towards a remote scene (S). Moreover, the system (10) also incorporates a second antenna (45) and associated electronic circuits for receiving interrogating radiation reflected from the scene (S) and generating correponding first and second processed signals. The first and second processed signals correspond to a broader main beam response of the antenna (45) and to a narrower main beam response thereof respectively. By mutually comparing the first and second processed signals, the system (10) is operable to identify those second processed signals affected by interference from the scene (S). The system (10) also incorporates electronic units (430, 440) operable to calculate adaptive weights for modifying the narrower response to steer its nulls in directions of interfering sources in the scene (S) when the narrower response is used to generate an overall output from the system (10), the units operable to selectively use second signal samples identified as being subject to interference for calculating the adaptive weights. The system (10) is operable to store its first and second signals for a period not less than that associated with updating the adaptive weights, thereby providing the system (10) with enhanced interference suppresssion characteristics.
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