Beamforming method based on multi-point accurate control

Abstract

The invention discloses a beam forming method based on multi-point accurate control. The specific implementation mode of the method comprises the following steps: marking the current weight vector ofa phased array as Wk, pi, calculating the updating step length mu k + 1, m of the weight vector, and updating the weight vector Wk + 1, m, so that the current directional diagram level vector is equalto the expected directional diagram level vector under the current cycle; and defining a steering vector matrix A (theta0, thetak + 1, m), performing singular value decomposition on the A (theta0, thetak + 1, m) to obtain a current cyclic U matrix and an H matrix, calculating a weight vector Wk + 1, pi according to the parameters, completing circulation and iteration, and outputting the weight vector Wk, pi to realize beamforming. According to the implementation mode, beam forming is achieved through the array antenna, few times of iteration can be conducted on the initial weight vector, theexpected directional diagram level vector can be obtained, the antenna directional diagram level vectors in multiple directions can be accurately controlled at the same time in the iteration process,and the implementation process is efficient and accurate. The method has the capability of accurately controlling the main lobe and the side lobe of the antenna pattern, and improves the flexibility of the system.

Description

technical field [0001] The present application relates to the field of signal processing technology, in particular to the field of array signal processing, and in particular to a beamforming method based on multi-point precise control, which can be used for electronic reconnaissance, communication, anti-jamming, etc. Background technique [0002] Beamforming (also known as array pattern synthesis) is an important research direction in array processing, which is a signal processing technique that uses sensor arrays to send and receive signals in a direction. Beamforming plays an important role in the high performance of the array system. For example, in a radar system, it is usually necessary to form a deep null in the direction of interference to achieve interference suppression. In some communication systems, multi-beam patterns need to be designed to realize data transmission to multiple users. In satellite remote sensing applications, it is necessary to design a wide ma...

AI Technical Summary

Problems solved by technology

However, the existing methods mostly control a single point / single direction or a few points / directions, such as forming a main lobe in the target signal direction by constraining it, and forming a null trap in the interference direction to achieve interference suppression

However, this method is difficult to effectively control the antenna pattern in directions other than the main lobe direction and the interference direction, and it is difficult to control the antenna beam accurately, flexibly and efficiently, and problems such as widening of the main lobe beam and side lobe level rise occur. degrade the performance of electronic equipment

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