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Multi-channel adaptive beam forming method based on LCMV criterion

An adaptive beamforming and multi-channel technology, applied in the field of telecommunications, can solve the problems of not being suitable for large arrays, slow computing speed, and difficult batch operations, etc., and achieve the effect of fast adaptive beamforming method and high real-time performance

Active Publication Date: 2022-03-04
BEIJING RES INST OF TELEMETRY +1
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Problems solved by technology

However, these two methods are difficult to implement in actual engineering, and it is not easy to perform actual batch operations
[0004] Guo Yecai, Chen Chen, Hu Guole. Robust Beamforming Algorithm Based on Covariance Matrix Reconstruction [J]. Laboratory Research and Exploration, 2020, 039(003): 1-5. Integrate the direction range to estimate the steering vector, and then use the main mode suppression to remove the redundant coherence between the signals, and reconstruct the final covariance matrix. Although this algorithm can improve the robustness, but in actual engineering The calculation speed is slow and takes a long time, and it is not suitable for the structure of large arrays
[0005] Li Peng, Xia Xiang, Yu Chuanfu, et al. Robust beamforming based on steering vector estimation [J]. Radar Science and Technology, 2020, 018(001): 21-26, 33. This paper proposes a weighted spatial smoothing Robust beamforming algorithm combined with steering vector estimation, but this method is not suitable for arrays with many elements

Method used

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  • Multi-channel adaptive beam forming method based on LCMV criterion
  • Multi-channel adaptive beam forming method based on LCMV criterion
  • Multi-channel adaptive beam forming method based on LCMV criterion

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Embodiment 1

[0046] Such as figure 1 Shown, a kind of multi-channel adaptive beamforming method based on LCMV criterion is characterized in that: comprise the following steps:

[0047] S1. Divide the antenna array into 8 sub-arrays according to the antenna array structure to form 8 channels;

[0048] S2. Generate a sub-array transformation matrix T according to the Taylor weighting formula and the antenna array structure;

[0049] S21. Obtain the sub-array formation matrix: the sub-array formation matrix T 0 for:

[0050]

[0051] Among them, T x Form the matrix for the subarray in the x direction, T z Form the matrix for the subarray in the z direction, Product for Kronecker;

[0052] S22. Obtain the steering vector Φ of the desired signal 0 and weighting matrix w t : Using the Taylor weighting formula to get the steering vector Φ 0 :

[0053]

[0054] Pairs of subarrays form matrix T 0 The array elements are weighted, assuming Weighting the magnitude of the array elem...

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Abstract

The invention provides a multi-channel adaptive beam forming method based on an LCMV criterion, is suitable for radar communication sidelobe anti-interference application, and belongs to the field of array signal processing. Compared with a traditional beam forming algorithm, the method has the advantages that sub-array division is carried out on the array plane according to the actual array plane structure and engineering requirements of the radar, the multi-channel signal model is generated, adaptive beam forming is carried out by using the LCMV criterion, and the method is high in real-time performance and easy to implement. Compared with a traditional beam forming algorithm, the method has the advantages that the operation speed is higher under the multi-channel condition.

Description

technical field [0001] The invention relates to the technical field of electric communication technology, in particular to a multi-channel adaptive beamforming method based on the LCMV criterion. Background technique [0002] Adaptive beamforming technology is an important branch of array signal processing. It is widely used in sidelobe anti-interference in navigation, aircraft measurement and control, and precision guidance in the aerospace field. In recent years, it has become the key to the new generation of aerospace, radar, and communication fields. One of the techniques. Adaptive beamforming technology can effectively realize functions such as interference suppression by adjusting the receiving channel weight coefficient, and has been widely used in aerospace, radar, wireless communication, sonar, seismic survey and other systems. The traditional adaptive beamforming is mainly based on the comprehensive array for data processing. Due to the large number of radar array...

Claims

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Application Information

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IPC IPC(8): H04B7/06H04B7/08
CPCH04B7/0617H04B7/086Y02D30/70
Inventor 柏沫羽刘昊张彬闫海鹏
Owner BEIJING RES INST OF TELEMETRY
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