Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Estimation method for arrival angle

A technology of angle of arrival and spectrum estimation, applied in the field of angle of arrival estimation, can solve problems such as unobtainable performance and influence of user space characteristics, achieve the effect of suppressing strong interference and improving estimation accuracy

Inactive Publication Date: 2012-09-26
RUGAO CHANGJIANG SCI & TECHCAL IND CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the presence of strong interference from adjacent cells, the spatial characteristics of users will be affected, and the existing DOA estimation methods cannot obtain ideal performance.

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
  • Estimation method for arrival angle
  • Estimation method for arrival angle
  • Estimation method for arrival angle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The basic thought of the present invention is, when carrying out DOA estimation to the target user of this cell, construct interference channel impulse response matrix (abbreviation interference matrix) by the channel impulse response matrix of interference user in each adjacent cell, and use interference matrix The covariance matrix of the target user (referred to as the interference covariance matrix) is used to modify the covariance matrix of the target user, and use the modified covariance matrix of the target user to perform fixed beam scanning or spectrum estimation to obtain the DOA estimation result of the target user, so as to suppress Interfering users interfere with the cell.

[0023] The present invention will be described in detail below with reference to the drawings and embodiments.

[0024] figure 1 It is a flow chart of the method for estimating the angle of arrival applied to the TD-SCDMA system according to the embodiment of the present invention. S...

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 estimating a direction of arrival. When the DOA estimation is performed on a target user in a cell, channel impulse response matrices ch_hn<k[j]>s of various interference users of adjacent cells are calculated, and an interference matrix HDI is generated according to the ch_hn<k[j]>s; an inverse matrix of a spatial covariance matrix of the HDI is used to be left multiplied by a spatial covariance matrix of the target user to obtain a modified spatial covariance matrix Rmodify of the target user; the Rmodify is used to calculate the direction of arrival of the target user; and the HDI consists of a column corresponding to maximum tap power values in the ch_hn<k[j]>s or is generated through the adding of the ch_hn<k[j]>s. The method uses the spatial covariance matrix of the HDI to modify the spatial covariance matrix of the target user, which effectively inhibits the strong interference caused by the interference users and improves the estimation accuracy of the DOA.

Description

technical field [0001] The invention relates to a method for estimating an angle of arrival (Direction of Arrival, referred to as DOA). Background technique [0002] As the key technology in TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) system, smart antenna has been researched more and more deeply in recent years. The space-time signal processing technology formed by the combination of smart antenna and traditional time-domain signal processing technology shows great potential in expanding cell range, improving system capacity, improving system spectrum utilization, reducing transmit power and reducing user interference. DOA estimation is the basis of smart antenna wireless technology positioning and channel allocation. [0003] In the absence of strong interference, the existing DOA estimation method based on the maximum criterion of uplink received signal power can obtain better performance. However, in the case of strong interference from adjacent ...

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): H04B7/04H04B7/216H04L25/02H04L25/03
Inventor 丁婷
Owner RUGAO CHANGJIANG SCI & TECHCAL IND CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com