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Method for carrying out test on transmitter index and test system

A test system and transmission channel technology, applied in the field of communications, can solve the problems of the device under test and the spectrum analyzer cannot be synchronized, and achieve the effect of solving inaccurate measurement, solving the problem of synchronization, and ensuring accurate synchronization

Active Publication Date: 2010-04-14
XFUSION DIGITAL TECH CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0010] The purpose of the present invention is to provide a method and a test system for testing the indicators of the transmitter. Through the present invention, accurate synchronization between the device under test and the spectrum analyzer can be guaranteed, thereby solving the problem of the device under test in the prior art. The problem of not being able to synchronize with the spectrum analyzer

Method used

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  • Method for carrying out test on transmitter index and test system
  • Method for carrying out test on transmitter index and test system
  • Method for carrying out test on transmitter index and test system

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Embodiment Construction

[0045] The first embodiment provided by the present invention is a test model for testing the indicators of the transmitter, and its framework is as follows figure 2 As shown, including the device under test, duplexer, signal source generator and spectrum analyzer.

[0046] The functions of each device are described below:

[0047] The signal source generator: used to generate OFDM downlink wireless signals conforming to the 802.16-2004 protocol for synchronization of the receiver of the device under test, and to provide a high-precision clock source to the spectrum analyzer.

[0048] The device under test is used to receive the OFDM downlink wireless signal of the signal source generator, estimate the time-frequency and phase deviation according to the OFDM downlink wireless signal, and use the estimated time-frequency and phase deviation to adjust its transmission channel, And transmit the uplink wireless signal through the adjusted transmission channel.

[0049] The spec...

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Abstract

The invention discloses a transmitter index testing method and testing model, which comprises the following parts: measuring device, spectrum analyser and signal source generator, wherein the signal source generator generates clock source and the clock source generates descending wireless signal; the clock source is provided for spectrum analyser; the descending wireless signal is transferred to measuring device; the measuring device catches descending wireless signal; the descending wireless signal with clock source sends up wireless signal to spectrum analyser for check. The invention can check index of measuring device accurately, which solves the problem which the measuring device and spectrum analyser are out of phase.

Description

technical field [0001] The invention relates to the communication field, in particular to a testing technology for testing indicators of transmitters. Background technique [0002] Based on the IEEE 802.16-2004 protocol, WiMax (Worldwide Interoperability for Microwave Access) is a Broadband Wireless Access standard with broad market prospects. It is mainly used in wireless metropolitan area network. It adopts OFDM (Orthogonal Frequency-division Multiplexing, Orthogonal Frequency-Division Multiplexing) multi-carrier transmission technology for microwave and millimeter wave frequency bands, and can transmit high-speed data services. [0003] The OFDM system has a good ability to resist multipath interference after adopting the cyclic prefix, but since the spectrums of the subcarriers cover each other, this puts forward strict requirements on the orthogonality between them. [0004] Due to the time-varying nature of the wireless channel, the spectral shift of the wireless sign...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B17/00H04B17/10
Inventor 沈雷
Owner XFUSION DIGITAL TECH CO LTD
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