Two-dimensional arrival angle estimation method of L-shaped array

Abstract

The invention provides a two-dimensional arrival angle estimation method of an L-shaped array. Observation data vectors of the x axis and the y axis are constructed through an N-time snapshot data matrix receiving an array. A measuring matrix of the x-axis direction and a measuring matrix of the y-axis direction and corresponding sparse signal vectors are constructed. The direction cosine matrix estimated value of the x axis and the direction cosine matrix estimated value of the y axis are calculated by utilization of a minimum absolute contraction and selection algorithm. The direction cosine estimated value of the x-axis direction and the direction cosine estimated value of the y-axis direction are paired by utilization of reference array elements. A two-dimensional arrival angle of the signal is calculated by utilization of the paired direction cosine estimated value of the x-axis direction and the direction cosine estimated value of the y-axis direction. The a rough estimated values of the signal vectors are calculated by utilization of a minimum absolute contraction and selection algorithm, signal parameter pairing is carried out by utilization of power, and estimation precision of a signal arrival angle and power can be raised.

Description

technical field [0001] The invention belongs to the technical field of signal processing, in particular to a method for estimating the arrival angle of an L-shaped array signal. Background technique [0002] Estimation of signal direction of arrival is one of the important research contents of signal processing. The direction of radiation source is an important basis for distinguishing radiation sources, signal sorting and identification, guiding interference direction, and passive positioning and tracking. The two-dimensional angle of arrival (DOA) estimation of the signal is more practical. The existing two-dimensional MUSIC algorithm to calculate the angle of arrival is a direct extension of the one-dimensional MUSIC algorithm applied to the two-dimensional array, but the algorithm requires two-dimensional spectral peak search, calculation The amount is huge, and it is difficult to be practically applied. In recent years, the signal angle-of-arrival estimation method bas...

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Problems solved by technology

The two-dimensional angle of arrival (DOA) estimation of the signal is more practical. The existing two-dimensional MUSIC algorithm to calculate the angle of arrival is a direct extension of the one-dimensional MUSIC algorithm applied to the two-dimensional array, but the algorithm requires two-dimensional spectral peak search, calculation Huge amount, difficult to get practical application

In recent years, the signal angle-of-arrival estimation method based on compressed sensing with angular space sparseness has created a new signal sampling method, but the existing signal angle-of-arrival estimation method based on compressed sensing theory is mainly based on one-dimensional equidistant linear array There are few research reports on how to estimate the one-dimensional angle of arrival of the two-dimensional angle of arrival

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