High-precision noise adaptive direction finding method
A self-adaptive, high-precision technology, applied to direction finders using ultrasonic/sonic/infrasonic waves, etc., can solve problems such as low accuracy, reduce processing difficulty, facilitate algorithm processing, and meet adaptive needs.
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[0054] The embodiment is basically as figure 1 As shown, a high-precision noise adaptive direction finding method includes the following steps:
[0055] Step 1: Establish a noise-adaptive array direction-finding model based on a uniform line array:
[0056] Step 11: Set the number of array elements of the uniform linear array as M, the distance between the array elements as d, and N uncorrelated signals are incident on the uniform linear array, and the incident angle is θ i , i=1, 2,..., N; the array receiving noise is Gaussian noise or impact noise, and the signal and noise are independent of each other;
[0057] The array received signal data of the array at time t can be expressed as X(t)=AS(t)+N(t), where, and X(t)=[x 1 (t),...,x M (t)] T , x j (t) represents the received data at the jth (j=1, 2, ..., M) array element position at time t, [*] T Represents the transposition operation of matrix vector; A=[a(θ 1 ),…, a(θ N )], for the array flow type, denote the arra...
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