Method for restricting static directional pattern sidelobe based on subarray-level digital weighting
A sidelobe suppression and sub-array-level technology, which is applied to direction finders using radio waves, components of radio wave directors, etc., can solve problems such as high cost and complex array structure, achieve significant application value, and reduce array costs The effect of complexity
Inactive Publication Date: 2011-07-13
HARBIN INST OF TECH
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[0007] The purpose of the present invention is to solve the problems of high cost and complicated array structure existing in the existing method of using analog weighting to suppress the sidelobe of the static pattern, and to provide a method for suppressing the sidelobe of the static pattern based on subarray-level digital weighting
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specific Embodiment approach 1
[0017] Specific implementation mode one: the following combination figure 1 with figure 2 This embodiment is described. This embodiment is based on a sub-array-level digital weighted static pattern sidelobe suppression method. The specific process is as follows:
[0018] Step 1. Calculate the element-level Taylor weighting vector w of the planar phased array Tay ;
[0019] Step 2. Obtain the objective function H(w sub ) The subarray-level digital weighting vector w used to suppress the sidelobe of the static pattern with the minimum value sub , the objective function H(w sub ) is the sub-array digital weight vector w sub The equivalent element-level weighting vector and the element-level Taylor weighting vector w described in step 1 Tay The degree of approximation in the least mean square sense;
[0020] Step 3, using the subarray-level digital weighting vector w described in step 2 sub Input signal vector x to subarray level sub (t) weighted to obtain the sub-array ...
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The invention relates to a method for restricting a static directional pattern sidelobe based on subarray-level digital weighting, in particular to a static directional pattern sidelobe restriction method of a planar phased array, overcoming the shortages of high cost and complicated array structure existing in a method for restricting a static directional pattern sidelobe by utilizing analog weighting. The method comprises the following concrete steps of: (1) counting the array-level Taylor weighting vector wTay of the planar phased array; (2) solving the subarray-level weighting vector wsub of an equivalent array-level weighting vector, which is most approximate to the array-level Taylor weighting vector wTay in a minimum mean-square sense and is used for restricting the static directional pattern sidelobe; and (3) weighting a subarray-level input signal xsub(t) of the array by utilizing the subarray-level weighting vector wsub so as to acquire a subarray-level output signal ysub(t) of the array. The invention is very significant to lower the array cost and the complexity of the phased array.
Description
technical field [0001] The invention relates to a method for suppressing side lobes of static pattern by using sub-array level digital weighting. Background technique [0002] An array antenna consists of multiple antennas arranged in a certain order. Phased array is a very important form of array antenna, which has important applications in communication, smart antenna, radio direction finding, seismic exploration and other fields. It controls the beam pointing of the pattern through a phase shifter, which has great advantages over traditional mechanical scanning methods. It does not need to mechanically rotate the antenna, greatly improves the beam scanning speed, and has the advantage of quickly finding targets; even in a multi-target environment, it can quickly track multiple targets by changing the phase shifter. The phased array can use the phase difference between array elements for direction finding, and the beam width can be effectively reduced by increasing the a...
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IPC IPC(8): G01S3/04
Inventor胡航胡易苏宏艳邱朝阳朱淮诚董晔刘伟会
OwnerHARBIN INST OF TECH