Estimation method for radio orientation incoming wave direction based on TD-SCMA

A TD-SCDMA, wireless positioning technology, applied in the field of wireless positioning, can solve problems such as cannot be directly applied

Inactive Publication Date: 2004-08-25
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0004] In order to overcome that the MUSIC algorithm cannot be directly applied to the direction of arrival (DOA) estimation of TD-SCDMA wireless positioning, this patent provides a method for estimating the direction of arrival (DOA) based on TD-SCDMA wireless positioning. SCDMA circular array smart antenna DOA estimation problem, and can also solve the DOA estimation problem of TD-SCDMA related signal sources

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  • Estimation method for radio orientation incoming wave direction based on TD-SCMA
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  • Estimation method for radio orientation incoming wave direction based on TD-SCMA

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Embodiment Construction

[0116] 1. Firstly, transform the TD-SCDMA wireless positioning array element space uniform circular array into the model space virtual uniform linear array:

[0117] First, using the concept of the mode space unique to the circular array, especially the periodicity of the circular array, the signal on the circular array can be Fourier decomposed, that is, the signal can be regarded as the sum of multiple harmonic components, each harmonic The component is called a mode component, and all the mode components constitute the entire mode space. In view of the fact that my country's TD-SCDMA wireless positioning uses an 8-element smart antenna to achieve circular-angle positioning, the circular array is transformed from the array element space to the pattern space through the array preprocessing technology, so that the array manifold is transformed from a complex exponential function The form is transformed into a simple form similar to a linear array, so that it can be conveniently...

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Abstract

The invention is a DOA estimating method to realize circle-angle positioning based on TD-SCMDA standard, firstly adopting multiple signal classifying and correcting algorithms to realize the DOA estimation of intelligent antenna circle-angle positioning; aiming at TD-SCMDA antenna being uniform circle array, converting the array cell-space uniform circle array into mode-space virtual uniform line array; according to eigenvalue and eigenvector characteristic of the data covariance matrix of the virtual line array, advancing a MUSIC algorithm based on mode-space virtual uniform line array and deriving the MUSIC algorithm power chart for the virtual line array and the general implementation algorithm for the mode-space MUSIC algorithm; according to the character of MUSIC algorithm inapplicable to the DOA estimation of relative signal source, advancing the correcting MUSIC algorithm based on the mode-space virtual uniform line array; finally aiming at the problem that the array aperture is small and that the resistance to array cell error disturbance is bad, caused by MUSIC algorithm, advancing four-order cumulant MUSIC algorithm and four-order cumulant correcting MUSIC algorithm based on the mode-space virtual uniform line array.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to the wireless positioning technology of a mobile terminal. technical background [0002] Realizing wireless positioning of mobile terminals is an important research topic in IMT-2000. Unlike the Global Positioning System (GPS) which relies on 24 satellites for positioning, this technology relies on wireless cellular base stations, and its research and development work is directly related to the IMT-2000 standard, a third-generation mobile communication standard with independent intellectual property rights proposed in my country When TD-SCDMA was adopted by the International Telecommunications Union (ITU-T) for the first time, research on wireless positioning technology based on TD-SCDMA standard undoubtedly has extensive theoretical significance, application value and market prospect. [0003] The array manifold of the uniform linear array is a Vandermo...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/10H04Q7/00
Inventor 张毅汪纪锋罗元
Owner CHONGQING UNIV OF POSTS & TELECOMM
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