Beam forming method combined with array antenna unit pattern

Abstract

The invention provides a beam forming method combined with an antenna array element directional diagram. By utilizing the beam forming method, the performance when the directional diagrams of beam forming array antenna units are inconsistent can be enhanced. According to the technical scheme, the method comprises the following steps: for an array antenna, carrying out directional diagram test on each antenna unit of the array antenna, and establishing an array antenna directional diagram database according to an antenna test point directional diagram; obtaining a fine directional diagram responded by the array antenna in a direction with a higher discretization degree by utilizing an antenna directional diagram database and adopting an interpolation mode of linear interpolation and splineinterpolation; carrying out interpolation on an actually measured antenna directional diagram to obtain a finer directional diagram of the array antenna, utilizing the antenna directional diagram to correct a guide vector of an ideal array antenna, wherein the correction method comprises the following steps: carrying out Hadamard product on the fine directional diagram obtained by interpolation and the guide vector of the ideal array antenna to obtain a corrected guide vector; and then obtaining a beam forming weight vector by using algorithms such as a linear constraint minimum variance LCMVand the like.

Description

technical field [0001] The present invention relates to a beam forming method widely used in the fields of radar, communication, sonar, earthquake, and astronomy, etc., and in particular relates to a beam forming method of combined array antenna unit pattern. Background technique [0002] Array signal processing is an important branch of signal processing. Array signal processing refers to the processing of signals induced by array elements. Array signal processing can be divided into two branches: direction of arrival (DOA) estimation and spatial filtering. The main issues of array signal processing include: spatial spectrum estimation for super-resolution estimation of the distribution of the direction of arrival of space signals; beamforming techniques for the main lobe of the array pattern to point in the desired direction; aligning the null point of the antenna to all Null formation technique for interference direction. The antenna pattern is a graph that characteriz...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problem that the beam performance of the array antenna beamforming method is degraded when the pattern of the array antenna unit is inconsistent, and provides a beamforming method that can weaken the performance degradation caused by the inconsistency of the antenna amplitude and phase and combine the pattern of the array antenna unit

Images