Fast estimation method for estimating direction of arrival (DOA) of higher-order cumulant

A high-order cumulant and direction-of-arrival technology, applied in the field of communication, can solve problems such as low signal resolution, low incident signal resolution, and shorten DOA calculation time consumption

Inactive Publication Date: 2016-01-20
梁海浪 +1
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Problems solved by technology

[0005] The present invention mainly solves the technical problems existing in the prior art, such as low signal resolution for signals with small difference in incident angle, low resolution for incident signals with low signal-to-noise ratio, low resolution for incident signals, etc., and provides A fast calculation method of DOA applied to 60GHz

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  • Fast estimation method for estimating direction of arrival (DOA) of higher-order cumulant
  • Fast estimation method for estimating direction of arrival (DOA) of higher-order cumulant
  • Fast estimation method for estimating direction of arrival (DOA) of higher-order cumulant

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Embodiment

[0056] Embodiment: a kind of DOA fast estimation method of this embodiment, such as figure 1 shown, including the following steps:

[0057] Signal preprocessing stage:

[0058] According to the following formula (1), the cumulant matrix C of order 2q is constructed 2q,x ;

[0059]

[0060] in:

[0061] B(θ) is a generalized direction vector matrix, B(θ)=[b(θ 1 ), b(θ 2 ),…,b(θ k )];

[0062] C 2q,s (l) is the 2q order cumulant matrix of the signal s(t),

[0063] C 2 q , s ( l ) = c u m { s k 1 , s k 2 , ... , s k ...

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Abstract

The invention discloses a fast estimation method for estimating the direction of arrival (DOA) of a higher-order cumulant and aims to discloses a fast estimation method for solving the problems of system estimated capacity and array estimated accuracy and estimating the DOA of related signals, wherein the higher the order, the better the estimation performance. According to the method, firstly, a 2q-order cumulant matrix is constructed, and the constructed 2q-order cumulant matrix is subjected to rotation transformation. After that, the cumulant matrix is averaged to obtain a spatially smoothed 2q-order cumulant matrix. Then the 2q-order cumulant matrix is subjected to eigenvalue decomposition to obtain a signal subspace and a noise subspace. Finally, an optimal solution is figured out based on a spectral function. The above improved and optimized DOA algorithm is independent of the concrete characteristics of signals, thus being applicable to the Gaussian white-noise environment and the Gaussian color-noise environment. The method can reduce the computation complexity, and greatly shorten the calculation time of the DOA in a 60 GHz wireless communication system. The method is applicable to the 60 GHz wireless communication system.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method for fast estimation of direction of arrival applied to a 60GHz wireless communication system. Background technique [0002] In recent years, the mobile communication industry has developed rapidly all over the world, and the requirements for bandwidth are getting higher and higher. 60GHz wireless communication technology will become the representative of the 4th generation wireless communication technology due to its ultra-high-speed data transmission capability, low cost, high anti-interference and security, international versatility and license-free characteristics. However, its biggest challenge is the high path loss. The path loss of the 6OGHz frequency band determines that it must use beamforming technology and fast estimation of the direction of arrival to improve link quality. Direction of Arrival (DOA) estimation, also known as Direction of Arrival estim...

Claims

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Application Information

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IPC IPC(8): H04B17/00H04B7/04
Inventor 梁海浪贺向阳周建荣
Owner 梁海浪
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