Patent ID: 6768444
Filing Date: 2004-07-27
Classification: G01S

Abstract:
A method of non-continuous jamming interference suppression in a radar system incorporating emitting means for emitting interrogating radiation towards a remote scene and receiving means for receiving corresponding echo radiation returned from the scene in response to the interrogating radiation, the method including the steps of:(a) emitting the interrogating radiation from the emitting means towards a selected region of the scene; (b) receiving first echo radiation substantially from the selected region of the scene at the receiving means and generating a corresponding first received signal; (c) receiving second echo radiation substantially from the selected region and other regions surrounding the selected region and generating a corresponding second received signal; (d) mutually comparing the first and second signals and determining therefrom portions of the first signal subject to non-continuous jamming interference; (e) repeating steps (a) to (d) where necessary for one or more other selected regions until sufficient samples of the signals are available for performing an adaptive weight calculation; (f) selectively using the portions of the first signal where non-continuous jamming interference is detected in the calculation for calculating adaptive weight coefficients; (g) processing the signals using the adaptive weight coefficients to generate an overall output from the system corresponding to radiation reflected from one or more selected regions, the overall output being at least partially corrected for non-continuous jamming interference enabling target detection during periods of such interference; and (h) repeating steps (a) to (g) until all the selected regions of the scene to be interrogated have been interrogated.