Arrival angle calculating method and device

Abstract

The invention provides an arrival angle calculating method applied to a signal receiving terminal provided with multiple antennas. The method comprises that multipath superposed signals received by the multiple antennas are obtained; a channel state information matrix of the multipath superposed signals is extracted; the obtained channel state information matrix is divided into sub-matrixes of preset sizes, a decorrelation matrix and sub-matrix guiding vector matrixes of the sub-matrixes are obtained by calculation according to the sub-matrixes; according to the decorrelation matrix, the number of paths of the multipath superposed signals and a noise subspace matrix are calculated; flight time parameters of the different paths of the multipath superposed signals are calculated; and according to the flight time parameter of each multipath superposed signal in each path, the obtained sub-matrix guiding vector matrixes and the noise subspace matrix, the arrival angel of each multipath superposed signal in each path is obtained. Thus, the computational complexity in calculating the arrival angle can be reduced, and the AoA positioning efficiency is improved.

Description

technical field [0001] The invention relates to the field of positioning technology, in particular to a method and device for calculating an angle of arrival. Background technique [0002] The base station can use the AoA (Angle of Arrival, angle of arrival) positioning method to locate the mobile terminal. The AoA positioning method is based on the arrival angle of the signal arriving at the signal receiving end. The arrival angle refers to the distance between the signal received by the base station and the horizontal plane. angle. Specifically, first, the signal transmitting end transmits a signal to the signal receiving end; then, the signal receiving end obtains the signal through the equipped antenna array, calculates the angle of arrival of the signal, and then uses triangulation or other methods to solve the problem to obtain the signal transmission The location information of the terminal, and return the location information to the signal sending end, so as to real...

AI Technical Summary

Problems solved by technology

At present, the MUSIC (Multiple Signal Classification) algorithm is usually used to calculate the angle of arrival of the signal. However, using this algorithm to calculate the angle of arrival is to search for spectral peaks in two-dimensional space, and there are two unknown parameters in the calculation process , that is, the angle of arrival and time-of-flight parameters, the search space is large, and these two parameters need to be solved at the same time, so there is a problem of large amount of calculation, which reduces the efficiency of AoA positioning

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