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Method for testing vector amplitude value of error under high speed ascending grouped access channel configuration

A vector amplitude, access channel technology, applied in wireless communication, selection device, multiplexing communication, etc., can solve the problems of difficult HSUPAEVM test, difficult to deal with HSUPAEVM test, difficult RF modulation performance of composite channel, etc.

Inactive Publication Date: 2008-04-02
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since HSUPA technology introduces more high-speed code channels, and there is a time slot offset between each code channel, it is more difficult for HSUPA EVM testing
Due to the increase of high-speed code channels, the average EVM value of the composite channel has been difficult to accurately evaluate the RF modulation performance, so the traditional EVM test method has been difficult to cope with the HSUPA EVM test

Method used

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  • Method for testing vector amplitude value of error under high speed ascending grouped access channel configuration
  • Method for testing vector amplitude value of error under high speed ascending grouped access channel configuration
  • Method for testing vector amplitude value of error under high speed ascending grouped access channel configuration

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Embodiment Construction

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0024] Referring to FIG. 1 , it is a schematic structural diagram of an apparatus for testing error vector magnitude under HSUPA channel configuration according to an embodiment of the present invention. The test device of the EVM is composed of a terminal, a test unit, and a test adjustment unit. Wherein, the terminal adds the data of the DCH channel, the HS-DPCCH channel and the E-DCH channel after spreading to obtain an HSUPA data frame and sends it. The testing unit is used for despreading the HSUPA data frame sent by the terminal, and testing the EVM value. The test adjustment unit is used to control the terminal during the EVM test, and the terminal establishes an HSUPA call and changes transmission power according to the command of the test adjustment unit.

[0025] The testing process of the EVM is shown in FIG. 2 , which is a schematic flow chart o...

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Abstract

A method for testing error vector amplitude under high speed uplink packet access channel configuration is disclosed in the present invention, comprising: (1) constituting a HSUPA composite channel with a plurality of DCH channels, HS-DCH channels and E-DCH channels, and distributing power to each sub-channel; (2) establishing HSUPA call, and regulating terminal emitting power to most emitting power state for testing; (3) terminal emitting HSUPA data; (4) using spreading codes of DCH channel, HS-DCH channels and E-DCH channels separately to despread HSUPA composite channel, processing EVM test to the obtained DCH channels, HS-DCH channels and E-DCH channels, if the EVM value of the sub-channel is not more than presetting threshold, then reducing the terminal emitting power, returning to (3), until its emitting power achieving the least emitting power for testing getting across test. The method reduces interference between multiple code-channels and effect of time slot excursion between code-channels to EVM value, and overcomes the defect that the average EVM value of the HSUPA composite channel difficult to really reflect each sub-channel modulation performance.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a method for testing the magnitude of an error vector under the configuration of a high-speed uplink packet access channel, which is used in a WCDMA system. Background technique [0002] WCDMA (Wide-band Code Division Multiple Access, wideband code division multiple access) broadband wireless communication system is one of the third generation mobile communication system (3G) international standards. HSUPA (High Speed ​​Uplink Packet Access, High Speed ​​Uplink Packet Access) is an effective technology to further increase the uplink channel capacity and bandwidth utilization without changing the existing hardware, and it is compatible with HSDPA (High Speed ​​Downlink Packet Access) Access, high-speed downlink packet access) is compatible with R99 and is the evolution direction of WCDMA system development. [0003] HSUPA is conducting research on the test method and parameter...

Claims

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Application Information

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IPC IPC(8): H04Q7/34H04Q7/38H04Q7/32H04B17/00H04J13/00H04W24/04H04W52/20H04W52/24
Inventor 李君彭宏利
Owner ZTE CORP