Patent ID: 8655298

Claim:
Method for locating sources interfering on a signal received by a receiver comprising an array of antennas, said method comprising the following steps: a step of calculating the spatio-temporal intercorrelation matrix R xx of the signals received by the elementary antennas of the said array, a step of subdividing the useful band of the said signals into sub-bands (b) and of generating a bandpass filter H(b) associated with each sub-band (b), for each sub-band (b), a step of calculating the spatial intercorrelation matrix R(b) associated with the sub-band (b) by applying the said filter H(b) to the spatio-temporal intercorrelation matrix R xx , a step of calculating at least one eigenvalue {λ 1 , λ 2 , . . . λ M } of the said spatial intercorrelation matrix R(b), a step of detecting interference, an interfering source being detected when an eigenvalue λ k satisfies the following detection criterion: log ⁡ ( ( ∑ m = k M ⁢ λ m ) ⁢ / ⁢ ( M - k + 1 ) ) - log ⁡ ( ∏ m = k M ⁢ λ m ) ⁢ / ⁢ ( M - k + 1 ) > threshold , where M is the number of antennas of the said array, k is the index, varying from 1 to M, of the eigenvalues in descending order and threshold is a strictly positive predetermined detection threshold, a step of determining the set of eigenvectors {U 1 , U 2 , . . . U N } corresponding to the eigenvalues {λ 1 , λ 2 , . . . λ N } associated with a detected interfering source, the said set constituting a basis of the interference sub-space, a step of determining the directions of arrival of the interfering sources by searching for the vectors of relative gains belonging to the said interference sub-space or which are orthogonal to the orthogonal noise sub-space and complementary to the interference sub-space.