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Method for testing specific absorption rate of TD-LTE mobile phone

A specific absorption rate, mobile phone technology, applied in the field of TD-LTE mobile phone SAR testing, can solve problems such as affecting the stability and consistency of SAR values, not supporting continuous transmission, and increasing errors in SAR measurement results, to avoid system upgrades and The effect of standard revision, reducing the risk of testing and certification, and improving the accuracy of SAR testing

Inactive Publication Date: 2017-12-29
JIANGSU SUPERVISION & INSPECTION INST FOR PROD QUALITY
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AI Technical Summary

Problems solved by technology

However, TD-LTE mobile phone products do not support continuous transmission, and the output power will become nonlinear due to the change of duty cycle (generally, nonlinear phenomena are prone to occur in areas with large duty cycle), which will lead to SAR measurement The resulting error increases, thereby affecting the robustness and consistency of SAR values

Method used

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  • Method for testing specific absorption rate of TD-LTE mobile phone
  • Method for testing specific absorption rate of TD-LTE mobile phone
  • Method for testing specific absorption rate of TD-LTE mobile phone

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Embodiment Construction

[0036] For simplicity, the specific implementation process of the present invention is described by taking the special subframe number 7 and the extended uplink cyclic prefix as an example. In this example, the UpPTS has 5120 uplink pilot time slots, and when the uplink and downlink configuration of the frame structure is 0, there are 2 downlink subframes, 2 special subframes and 6 uplink subframes in one frame. Substitute into formula (1) to get:

[0037][5120×(1 / 30720)×2+6×1] / 10=63.3%

[0038] By analogy, the signal duty cycles corresponding to all supported uplink and downlink configurations of the TD-LTE frame structure can be obtained, as shown in Table 3 below:

[0039] frame configuration

0

1

2

3

4

5

6

duty cycle

63.3％

43.3％

23.3％

31.7％

21.7％

11.7％

53.3％

[0040] Table 3 TD-LTE signal duty cycle

[0041] Then the maximum value of the duty ratio β=63.3%. Assuming that the frame structure configuration is ...

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Abstract

The invention provides a method for testing a specific absorption rate of a TD-LTE mobile phone. Linear scaling processing is performed on an SAR value measured under a non-maximum duty ratio to scientifically and accurately evaluate the SAR value level of the TD-LTE mobile phone. According to the method provided by the invention, the existing test system and test method standards are maximally used, thereby avoiding large-scale system upgrade and standard amendment. Meanwhile, by adoption of the test method provided by the invention, the defect of a relatively large error resulting from the fact that the SAR test is performed on the TD-LTE mobile phone under limit working conditions is avoided, and the SAR test precision is improved, so that the detection and authentication risks of the TD-LTE mobile phone are effectively reduced.

Description

technical field [0001] The invention relates to the test of the specific absorption rate (SAR) of a mobile phone, and more specifically relates to a method applied to the SAR test of a TD-LTE mobile phone. Background technique [0002] With the development of wireless communication technology, people are increasingly exposed to electromagnetic fields of various frequencies and intensities. Electromagnetic radiation has become a new type of special environmental pollution. Especially the impact of mobile phone electromagnetic radiation on human health has caused people to of great concern. When this type of equipment is used close to the face or body of a person, when the electromagnetic radiation power absorbed by the human body exceeds a certain limit, it will have adverse effects. [0003] At present, many countries and scientific research organizations generally use the specific absorption rate (SAR) to evaluate the impact of electromagnetic radiation on the human body. ...

Claims

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Application Information

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IPC IPC(8): H04M1/24
CPCH04M1/24
Inventor 梁学俊武斌水利民
Owner JIANGSU SUPERVISION & INSPECTION INST FOR PROD QUALITY
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