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Array antenna pattern synthesizing method and device

A technology of array antenna, integrated method, applied in the field of communication

Inactive Publication Date: 2014-11-19
SHENZHEN INSTITUTE OF INFORMATION TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The embodiment of the present invention provides a comprehensive method of array antenna pattern, aiming to solve the problem of how to realize the diversity of antibody groups and apply it to the array antenna pattern

Method used

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  • Array antenna pattern synthesizing method and device
  • Array antenna pattern synthesizing method and device
  • Array antenna pattern synthesizing method and device

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specific Embodiment approach

[0090] Specifically, refer to figure 2 , figure 2 is a schematic diagram of an array antenna provided by the prior art. Such as figure 2 As shown, the array antenna is a linear array composed of N elements separated from each other and the array elements whose centers are arranged on a straight line. The array elements are all non-directional array elements, and the angle between the incoming wave direction and the array normal is θ, Array element spacing d, excitation value w=I T ie jφ , where I is the magnitude and φ is the phase. d, I and φ are the main parameters of the array antenna pattern. When the immune algorithm is used to synthesize the array antenna, it can be any parameter or any combination of parameters, and these parameters are used to form the antibody of the immune algorithm. Then set the value ranges of these parameters and encode them. The specific implementation method is as follows:

[0091] (1) Array element spacing

[0092] In order to avoid ...

example 1

[0156] Example 1: For a linear array with unequal spacing distribution of 40 units, symmetrical distribution of excitation amplitude, and equal excitation phase, by adopting the array antenna pattern synthesis method based on the immune algorithm of the present invention, a sidelobe voltage lower than -40dB is realized. Flat, such as Figure 4 as shown, Figure 4 It is a schematic diagram of low sidelobe directions of an array antenna provided by an embodiment of the present invention.

example 2

[0157] Example 2: For a linear array with 20 units equally spaced (λ / 2), the excitation amplitude of each array element is symmetrically distributed, and it is required to form three zero points below -100dB at 40°, 45°, and 50°. Level control within -15dB. Figure 5 It is the result that meets the requirements achieved by the array antenna pattern synthesis method based on the immune algorithm of the present invention, Figure 5 It is a schematic diagram of multiple nulls of an array antenna provided by an embodiment of the present invention.

[0158] The embodiment of the present invention provides a comprehensive method for array antenna pattern, the method obtains immune antibody groups with sufficient diversity through methods such as clonal selection, mutation and random generation of new antibodies; and uses Gaussian function as a mutation strategy to further improve improve the search efficiency of the algorithm. The proposed immune algorithm is used for sidelobe lev...

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Abstract

The embodiment of the invention provides an array antenna pattern synthesizing method. An immune algorithm is an effective algorithm for avoiding falling into a local maximum or minimum value and is better in effect when optimization of multiple targets is performed. According to the method, due to the method that new antibodies are randomly generated through clone selection and mutation, an immune antibody group diverse enough is obtained; a Gaussian function is adopted as a mutation strategy, and the searching efficiency of the algorithm is further improved. The provided immune algorithm is used for suppressing minor lobe electric level with linear arrays synthesized and generating zero points, and a good optimization effect is achieved.

Description

technical field [0001] The present invention relates to the field of communication, in particular to a method and equipment for synthesizing pattern patterns of array antennas. Background technique [0002] In modern communication systems such as mobile communication, smart antennas play an increasingly important role, and the synthesis of pattern is the core technology of smart antennas. How to timely adjust direction for signals and interference in different locations Figure 1 It has been a research hotspot in the field of smart antennas. In an adaptive smart antenna, since it is necessary to adjust multiple parameter variables to form an adaptive multi-wave rate, especially as a space division multiple access (Space Division Multiple Access, SDMA), the optimal allocation of system resources and the overall performance of the system can be achieved. It is very difficult to find out the best performance index. Due to its powerful self-heuristic ability, genetic algorithm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06N3/12
Inventor 叶剑锋管明祥何国荣周志文李鸣亮
Owner SHENZHEN INSTITUTE OF INFORMATION TECHNOLOGY
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