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A Broadband Pattern Synthesis Method Based on Linear Constraints

A technology of pattern synthesis and linear constraints, applied to antennas, antenna arrays, design optimization/simulation, etc., can solve the problem of inconsistent beam width of the main lobe beam, and achieve the effect of improving beam width performance

Active Publication Date: 2021-05-14
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, none of these three methods can solve the problem of inconsistency in the beamwidth of the main lobe beam generated during broadband pattern synthesis.

Method used

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  • A Broadband Pattern Synthesis Method Based on Linear Constraints
  • A Broadband Pattern Synthesis Method Based on Linear Constraints
  • A Broadband Pattern Synthesis Method Based on Linear Constraints

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Experimental program
Comparison scheme
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Embodiment 1

[0048] See figure 1 , figure 1 It is a flow chart of a linear constraint-based broadband pattern synthesis method provided by an embodiment of the present invention; including:

[0049] Step 1: Establish a broadband array signal model;

[0050] In this embodiment, for the M-dimensional uniform linear array, the broadband array signal model is established as follows:

[0051] B(f k ,θ)=[b(f k ,θ 1 ),…,b(f k ,θ P )] T ;

[0052] Among them, B(f k , θ) represents a broadband array signal model of an M-dimensional uniform linear array including K frequency points and P incident angles, f k Indicates the frequency of the kth frequency point, and its value range is 1≤k≤K; θ represents the incident angle, and its value range is 0°≤θ≤180°; in, c represents the speed of light, d represents the distance between array elements, and the value range of p is 1≤p≤P.

[0053] In this embodiment, it is assumed that the range of the main lobe of the integrated pattern is [θ l1 ,...

Embodiment 2

[0084] The validity of the present invention is further illustrated through simulation experiments below.

[0085] See image 3 , image 3 It is a schematic diagram of the array structure provided by the embodiment of the present invention; the element antenna of the array radar system used in this simulation experiment adopts image 3 The linear array structure shown is composed of 20 uniformly distributed array elements, and the center frequency f 0 =4GHz, bandwidth B=1GHz, divided into 20 frequency points, using the half-wavelength array of the highest frequency point, the range of the flat-top main lobe is [80°, 90°], the fluctuation range is ±0.1dB, and the level of the side lobe area Less than -30dB is required.

[0086] Simulation results:

[0087] See Figure 4 and Figure 5 , Figure 4 It is a schematic diagram of the comprehensive effect of the broadband pattern in the prior art provided by the embodiment of the present invention; Figure 5 It is a schematic ...

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Abstract

The invention discloses a method for synthesizing broadband pattern based on linear constraints, comprising: step 1: establishing a broadband array signal model; step 2: establishing a convex optimization model according to the broadband array signal model and solving the convex optimization model to obtain a direction The graph synthesizes the weight autocorrelation of each frequency point; step 3: using the spectral decomposition theorem to solve the weight value of each frequency point according to the weight autocorrelation of each frequency point to obtain a broadband pattern. The linear constraint-based broadband pattern synthesis method provided by the present invention solves the problem of inconsistency of the beam width of the main lobe beam generated during the broadband pattern synthesis in the prior art.

Description

technical field [0001] The invention belongs to the technical field of array signal processing, and in particular relates to a method for synthesizing broadband pattern based on linear constraints. Background technique [0002] With the rapid development of array signal processing in radar, communication and other fields, the scenarios where beamforming technology is applied are becoming more complex and diverse. In some cases, it is necessary to form an antenna pattern with a special shape and solve the optimal The method of preferential weight value is called the pattern synthesis technique. [0003] In recent decades, the direction graph synthesis technology has been deeply studied, and many algorithms such as adaptive iteration, intelligent algorithm, and convex optimization have emerged. In broadband pattern synthesis, since information of different frequency points needs to be considered, adaptive iteration and intelligent algorithms are not suitable for real-time pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20H01Q21/00
CPCH01Q21/00
Inventor 陶海红张笑语姜晓威
Owner XIDIAN UNIV