Patent ID: 7825857

Claim:
A method for biasing an adaptive antenna array against a reception area that is a potential source of low level interference without substantially affecting the quality of a desired signal reception, the method comprising: in a pre-processing stage, performing a step of: a) generating a bias covariance matrix of a simulated interference environment using bias region information comprising: postulating a threat region in angle of arrival where low-power level interference is likely to originate; generating a scenario of low-power and equi-power signals distributed across a postulated threat region; modeling a platform antenna array pattern in both spatial location and element factor to calculate modeled received signal vectors at each element of the array; calculating a biasing covariance matrix [C b ] from the modeled received signal vectors; loading the array biasing covariance matrix [C b ] into a system adaptive processor; and loading a pilot vector P into the system adaptive processor, in an operational stage, performing the steps of: b) adding the bias covariance matrix to a time-varying operational covariance matrix to generate a composite system covariance matrix; c) calculating an updated adaptive weight vector utilizing the composite system covariance matrix to control a plurality of antenna elements; and d) applying the updated adaptive weight vector to the plurality of antenna array elements to generate an adaptive antenna array output pattern biased against a reception area that is a potential source of low level interference.