Signal arrival direction self-correction method for sensor array
A sensor array, direction of arrival technology, applied in the field of sensors, can solve problems such as difficulty in obtaining prior statistical information
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[0045] As a preferred implementation, the iteration stop condition is: Among them, δ is a small positive number preset, is the estimated value of the signal direction of arrival for the ith iteration.
[0046] As the theoretical basis of the above embodiments, the derivation process of the relevant formulas of the present invention is described below.
[0047] When there is a phase disturbance error in the sensor element, the output of the array at time t can be expressed as:
[0048] y(t)=Γ(γ)A(θ)s(t)+n(t) (1)
[0049] In the above formula (1), the input signal vector and the noise vector are respectively
[0050] s(t)=[s 1 (t),s 2 (t),...,s p (t)] T (2)
[0051] as well as
[0052] n(t)=[n 1 (t),n 2 (t),...,n M (t)] T (3)
[0053] The ideal array direction matrix and direction vector are respectively
[0054] A(θ)=[a(θ 1 ), a(θ 2 ),…,a(θ p )] (4)
[0055] in,
[0056]
[0057] The phase error of the array element is represented by a diagonal matrix...
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