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Array antenna beam forming method based on improved hybrid invasive weed optimization

An array antenna and beam combining technology, which is applied in the field of array antenna beam combining based on the improved hybrid intrusion weed algorithm, can solve the problems of radiation main lobe and null position deviation, affecting the output accuracy of the array antenna, etc., and achieves fast convergence speed. Effect

Active Publication Date: 2015-04-22
HARBIN ENG UNIV
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Problems solved by technology

At present, many beamforming methods have been proposed, but the beamforming method seriously affects the output accuracy of the array antenna while increasing the convergence speed, and the radiation main lobe and null position have serious deviations.

Method used

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  • Array antenna beam forming method based on improved hybrid invasive weed optimization
  • Array antenna beam forming method based on improved hybrid invasive weed optimization
  • Array antenna beam forming method based on improved hybrid invasive weed optimization

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with accompanying drawing:

[0032] figure 1 It is a diagram of the array antenna system, describing the process of the antenna receiving, weighting and summing the space signal to obtain the output signal.

[0033] figure 2 It is a flowchart of the processing process of the array antenna on the space signal.

[0034] image 3 It is a comparison chart of the convergence characteristics of the Rastrigin function in the 5-dimensional case of the standard weed invasion algorithm (IWO), the improved adaptive weed invasion algorithm (MADIWO), and the improved mixed weed invasion algorithm (IHIWO); the small picture in the middle is a zoomed-in view of the first 20 iterations.

[0035] Figure 4 It is a comparison chart of the convergence characteristics of the optimal Griewank function of the IWO, MADIWO, and IHIWO algorithms in 5 dimensions; the small picture in the middle is the enlarged picture of ...

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Abstract

The invention relates to an array antenna beam forming method based on improved hybrid invasive weed optimization. The method includes the steps that array antennas receive spatial signals; weight vectors of the antennas are calculated; the antennas are weighted; output of the antennas is summed, and then output values are acquired, wherein the output of the antennas is the sum of the output values acquired after the antennas are weighted. Compared with traditional invasive weed beam forming, the method has the main advantages that the convergence rate is high compared with that of traditional invasive weed beam forming; the method is less in the local optimum risk compared with traditional invasive weed beam forming, and the method can be suitable for a system with the high real-time performance requirement.

Description

technical field [0001] The invention relates to an array antenna beam synthesis method based on an improved hybrid invasive weed algorithm. Background technique [0002] Modern communications are facing various new problems and challenges, and array antennas, as a new emerging thing, have attracted extensive attention. As an important aspect in the array antenna, array antenna beamforming helps the antenna to enhance the desired signal, suppress interference and noise, and thus obtain a higher signal-to-noise ratio output. In order to achieve this goal, adaptive beamforming needs to calculate the weight vector of each antenna, and weight the array antennas separately, and then sum the outputs of each antenna, so that the main lobe of the array antenna radiation is aligned with the desired signal, and in the direction of the interference signal produce zero traps. In practice, the direction of arrival of the signal is changing, so adaptive beamforming needs to converge quic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04H04W16/28
CPCH04B7/0413H04W16/28
Inventor 黄平李宇鹏詹洋燕陈晓园杨劲松
Owner HARBIN ENG UNIV
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