A Locating Method of Far-Field and Near-Field Mixed Signal Source

A technology of mixed signal and positioning method, which is applied in positioning, special data processing applications, measuring devices, etc., and can solve the problems of high computational complexity and large influence of sampling times.

Active Publication Date: 2016-06-08
五方智能车科技有限公司
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are certain defects and deficiencies. The estimation method based on high-order statistics requires high computational complexity; the estimation method based on matrix difference eliminates the far-field signal and noise in the mixed signal, and then estimates the near-field signal wave Direction of arrival, this method is greatly affected by the number of sampling times, and it is only effective in the case of large sampling data; although the calculation complexity of the SOS-based estimation method is low, this method distinguishes far-field and near-field signals based on subjective criteria type, somewhat subjective

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Locating Method of Far-Field and Near-Field Mixed Signal Source
  • A Locating Method of Far-Field and Near-Field Mixed Signal Source
  • A Locating Method of Far-Field and Near-Field Mixed Signal Source

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0064] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0065] A positioning method for a far-field and near-field mixed signal source, the specific implementation steps are summarized as follows:

[0066] 1) Calculate the estimated value of the array covariance matrix R

[0067] 2) Eliminate the noise part in the array covariance matrix to obtain the noise-free covariance matrix

[0068] 3) By the noise-free covariance matrix Construct a cost function to estimate the direction of arrival of the far-field signal by solving an optimization problem { θ k } k = 1 K 1 ;

[0069] 4) Calculate the oblique projection operator initial value;

[0070] 5) Use the oblique projection operator...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for locating far field and near field mixed signal sources. Oblique projection operators are used, far field signals are effectively extracted from mixed signals, a sensor covariance matrix only including near field signals is obtained, and thus the one-dimensional azimuth information of the near field signals is calculated. In addition, a more effective estimation method is provided for the calculation of the oblique projection operators, the saturation phenomenon occurring in the locating of the near field signal source is eliminated by introducing an alternating iterative process, and the method for locating the far field and near field mixed signal sources lowers computing complexity and is simple and effective.

Description

technical field [0001] The invention belongs to the technical field of array signal processing, and in particular relates to a positioning method (LOFNS) of a far-field and near-field mixed signal source. Background technique [0002] Source location has important applications in the fields of radar, sonar, and wireless communication. In some practical applications, such as voice location based on microphone arrays, the input signal is a mixture of far-field and near-field signals, and the far-field and near-field signals need to be estimated separately. and the one-dimensional direction of arrival of the near-field signal. Although many methods have been proposed to solve the problem of far-field and near-field mixed signal source localization, such as estimation methods based on high-order statistics, estimation methods based on matrix difference, estimation methods based on second-order statistics (SOS) Wait. However, there are certain defects and deficiencies. The esti...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/20G06F19/00
CPCG01S5/18G01S5/20
Inventor 左炜亮辛景民杨紫堃郑南宁
Owner 五方智能车科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap