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
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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,

Method used

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  • 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)

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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...

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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

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Application Information

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