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

Method and apparatus for determining EVM (error vector magnitude)

A technology of error vector magnitude and determination method, which is applied in the field of communication, and can solve problems such as difficult implementation, low accuracy of error vector magnitude determination, inter-symbol interference, etc.

Active Publication Date: 2014-06-04
DATANG MOBILE COMM EQUIP CO LTD
View PDF3 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] But for the TD-SCDMA system, the synchronization error will introduce inter-symbol interference, thereby affecting the EVM test. If a high EVM test accuracy is to be achieved, the timing requirements will be very high and it is difficult to achieve. Therefore, the current TD- The Determination Accuracy of Error Vector Magnitude in SCDMA System is Not High

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
  • Method and apparatus for determining EVM (error vector magnitude)
  • Method and apparatus for determining EVM (error vector magnitude)
  • Method and apparatus for determining EVM (error vector magnitude)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] Embodiments of the present invention provide a method and device for determining error vector magnitude, which perform timing estimation, synchronization, phase correction, and frequency offset correction on received data, and after obtaining corrected received data, further perform inter-symbol Interference elimination, so as to remove the intersymbol interference introduced by the synchronization error in the TD-SCDMA system, and determine the EVM according to the data after the intersymbol interference elimination, which improves the determination accuracy of the EVM.

[0026] Such as figure 2 As shown, the error vector magnitude determination method provided by the embodiment of the present invention includes:

[0027] Step S201, performing timing estimation, synchronization, phase correction and frequency offset correction on the received data to obtain corrected received data;

[0028] Step S202, performing inter-symbol interference cancellation on the corrected...

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 and apparatus for determining an EVM (error vector magnitude), and relates to a communication technology. The method comprises: performing timing estimation, synchronization, phase correction and frequency offset correction on received data, after the corrected received data is obtained, further performing intersymbol interference elimination on the corrected received data so as to remove intersymbol interference introduced by synchronization errors in a TD-SCDMA (time division synchronized code division multiple access) system, and determining the EVM according to data after the intersymbol interference is eliminated, so the determination accuracy of the EVM is improved.

Description

technical field [0001] The invention relates to communication technology, in particular to a method and device for determining error vector magnitude. Background technique [0002] With the rapid development of mobile communication systems, terminals supporting multiple standards have also been developed rapidly. At present, terminal manufacturers have developed systems that support Global System for Mobile Communications (Global System for Mobile Communications, GSM), Wideband Code Division Multiple Access (Wide -band Code Division Multiple Access, WCDMA), Time Division Synchronized CDMA (Time Division Synchronized Code Division Multiple Access, TD-SCDMA), Long Term Evolution (Long Term Evolution, LTE) and other related products. In the radio frequency conformance related test performed by the terminal, the Error Vector Magnitude (EVM) test item is used to evaluate the modulation quality of the terminal transmitted signal under various configurations. At this time, the acc...

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
IPC IPC(8): H04L25/02H04L25/03H04L27/26
Inventor 马艳君熊芳陈艳霞
Owner DATANG MOBILE COMM EQUIP 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