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Method and device for testing total isotropic sensitivity of mobile terminal

A total omnidirectional sensitivity, mobile terminal technology, applied in the field of mobile terminal total omnidirectional sensitivity testing, can solve the problems of not obvious improvement of measurement speed, limited improvement of test speed, slow TIS measurement speed, etc. and calculation accuracy, reducing the number of tests, and reducing the effect of test time

Active Publication Date: 2012-02-01
GENERAL TEST SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, it takes more than 40 minutes to conduct a TIS test of 3 channels in one frequency band
Some test systems increase the speed by reducing the number of transmitted bits during the bit error rate test, but this not only reduces the accuracy, but also limits the improvement of the test speed.
[0005] The disadvantage of the existing technology is that the measurement speed of the existing TIS is very slow. Although some existing technologies improve the measurement speed by reducing the accuracy, the improvement of the measurement speed is not obvious, and the measurement speed is not improved by reducing the accuracy. Good method
In particular, during the research and development of mobile phones, TIS measurement is often required, so the existing test methods are slow, making mobile phone testing a bottleneck for improving the speed of mobile phone research and development

Method used

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  • Method and device for testing total isotropic sensitivity of mobile terminal
  • Method and device for testing total isotropic sensitivity of mobile terminal
  • Method and device for testing total isotropic sensitivity of mobile terminal

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0113] (1) Select a channel from the frequency band to be tested, called the reference channel, at an initial position in space (θ s , φ s ) to test the bit error rate curve of the channel. The test can be carried out by selecting one of the two polarization directions of φ polarization and θ polarization arbitrarily. For the convenience of description, we select φ polarization for the first step (this step) of the test. That is: at the selected initial position (θ s , φ s ), adjust P once InRec Numerical value, test to get the corresponding bit error rate BER, repeat this process to get P InRec and several pairs of data corresponding to the bit error rate BER; the range of the obtained BER includes the target bit error rate BER of TIS SENS For example, the bit error rate stipulated in the GSM standard is 2.44%, and the minimum value of BER cannot be zero. The maximum value should avoid disconnection (communication link interruption) due to excessive bit error rate. The m...

Embodiment 2

[0123] In order to get P quickly trial，φ , so that in one polarization direction at each spatial position, only one bit error rate test is performed to obtain the BER trial , the test method is as follows:

[0124] (1) Test the radiation receiving sensitivity of the channel to be tested:

[0125] (1.1) Place the DUT at an initial position in space (θ s , φ s ), establish the communication between the device under test and the test instrument such as a base station simulator, and set the established communication channel to the channel under test. When there are multiple channels to be tested, measure them one by one, and call one of them the reference channel; the test can be carried out in any direction selected from the two polarization directions of φ polarization and θ polarization. For the convenience of description, this method In subsequent tests, when not specified, φ polarization is selected for testing.

[0126] (1.2) Suppose the downlink channel power of the me...

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Abstract

The invention provides a method for testing total isotropic sensitivity (TIS) of a mobile terminal, which comprises the following steps of: obtaining a functional relation curve between receiver port input power (PInRec) of a signal channel to be tested and a bit error rate (BER), wherein BER=f(PInRec) or PInRec=f-1(BER); carrying out phi polarization and theta polarization test according to the functional relation curve between the receiver port input power (PInRec) and the bit error rate (BER) to obtain equivalent isotropic sensitivities, i.e., EIS theta (theta i, phi j) and EIS phi (theta i, phi j) of a space position (theta i, phi j); and after testing the EIS theta (theta i, phi j) and the EIS phi (theta i, phi j) of all the space positions (theta i, phi j), calculating to obtain the TIS of the signal channel to be tested. According to the embodiment provided by the invention, the test speed of the TIS can be effectively increased on the premise of not losing the test accuracy, so that rapid and accurate TIS measurement is realized.

Description

technical field [0001] The invention relates to the technical field of mobile terminal reception performance testing, in particular to a testing method and device for total omnidirectional sensitivity of a mobile terminal. Background technique [0002] When a mobile terminal performs a network access test, the test of reception performance is an important item, and the test of reception performance is carried out according to the CTIA (Cellular Telecommunications Network Association) standard. According to the CTIA standard, on the spherical surface with the tested object as the center of the sphere, EIS (Effective Isotropic Sensitivity, equivalent omnidirectional sensitivity) measurement of 2 polarization directions at intervals of 30°, a total of 60 spatial positions, 120 times Sensitivity test. Then, all the test results are comprehensively calculated to give a single index TIS (Total Isotropic Sensitivity, total omnidirectional sensitivity). According to CTIA regulatio...

Claims

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Application Information

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IPC IPC(8): H04B17/00H04M1/725
CPCH04B17/008H04W24/06H04B17/29
Inventor 李文李映红
Owner GENERAL TEST SYST
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