Two-stage expansion transformation nested array design method for non-circular signal direction of arrival estimation
A technology for expanding transformation and design methods, applied in design optimization/simulation, special data processing applications, etc., to facilitate theoretical design and practical engineering applications, reduce operating costs, and increase the number of detections
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[0029] The content of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0030] With incident signal frequency 20GHz, array element total number N=11 is example, to the two-level extended transformation nested array of the present invention (such as figure 1 shown) build is described in detail.
[0031] (1) Calculate the incident signal wavelength λ=c / f=3.0×10 8 / 20×10 9 =1.5cm; use d to represent the basic unit of array element spacing, and take it as half wavelength, that is, d=λ / 2=7.5mm;
[0032] (2) According to the total number of elements N=13 given by the array, select a group of N 1 and N 2 , satisfying N=N 1 +N 2 , where N 1 ≥7,N 2 ≥1; in this case N was selected 1 =8,N 2 = 3;
[0033] (3) According to the selected N 1 and N 2 Constructs a transformation nested matrix; in this case, the transformation nested matrix consists of sparse subarrays and dense array composition;
[0034] (4...
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