CN101072420B - TD-SCDMA transmitter open/close time domain template testing method - Google Patents
TD-SCDMA transmitter open/close time domain template testing method Download PDFInfo
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- CN101072420B CN101072420B CN2007101277079A CN200710127707A CN101072420B CN 101072420 B CN101072420 B CN 101072420B CN 2007101277079 A CN2007101277079 A CN 2007101277079A CN 200710127707 A CN200710127707 A CN 200710127707A CN 101072420 B CN101072420 B CN 101072420B
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Abstract
The method includes steps: based on ON-OFF control circuit of each stage of amplifier in transmission channel of transmitter, the method measures control voltages of each stage of amplifier at switching time points stated by time domain module; loading distributed control voltages of each stage of amplifier at different switching time points on corresponding control ends of amplifier, and measuring signal levels output from transmitter at corresponding time and corresponding voltage; comparing the measured signal levels with signal levels required by time domain module (TDM) to determine the signal levels are satisfied the requirement of TDM. Using generic spectrum analyzer, the method can test whether signals output from TD-SCDMA transmitter satisfies requirement of TDM.
Description
Technical field
The present invention relates to the TD-SCDMA communication field, relate in particular to the method for testing of transmitter On/Off time domain module in the TD-SCDMA communication field.
Background technology
In the TD-SCDMA mobile communcations system, transmitter open and close time domain template is a very important technical indicator, be numbered " specification requirement of 2GHz TD-SCDMA digital mobile cellular telecommunication net equipment for radio access network " middle statement of YD/T1365-2006 as the standard of China's Ministry of Information Industry's issue on January 20th, 2006, transmitter On/Off time domain template is defined as the base station and opens transmitted power level and time relation when closing, as shown in Figure 1, stipulated whether transmitter signal level within official hour scope outside the transmission time slot drops to desired value, in order to avoid influence is with other user's reception frequently, and the TD-SCDMA system is a time-division system, so the test of time domain template is just even more important.
The test of transmitter On/Off time domain template is carried out under the time-division situation, during the transmission time slot, general transmitter (mainly referring to the base station) signal level all can be greater than 30dBm (1W), so signal to be measured all will connect attenuator about 30dB before in input instrument (frequency spectrograph) (or decayed in external attenuation+inside when test, but attenuation altogether should be for about 30dB), with making an uproar at the end generally about-150dBm/Hz (frequency spectrograph that has make an uproar the end more weaker) of time-frequency spectrometer, the end of making an uproar in the 1.6MHz signal bandwidth, just be-150+30+10log (1.6)+60=-54.8dBm on frequency spectrograph like this, the basic like this frequency spectrograph that can't guarantee is made an uproar the end less than-82dBm in the Transmitter Turn-Off time slot, so general frequency spectrograph can't carry out the test of transmitter On/Off time domain template at all, in YD/T 1366-2006 " 2GHzTD-SCDMA digital mobile cellular telecommunication net equipment for radio access network method of testing ", do not have the method for testing of this index is described in detail and analyzes yet, just be based on this reason, in research and development, production waits each stage, haves no alternative but sometimes abandon to this very test of important indicator.
Summary of the invention
The technical problem to be solved in the present invention is the method for testing that has proposed a kind of TD-SCDMA transmitter On/Off time domain template.
A kind of method of testing of TD-SCDMA transmitter On/Off time domain template, time domain module require transmitter outside transmission time slot in the official hour scope signal level drop to required value, comprise step:
A, according to the ON-OFF control circuit of amplifying devices at different levels in the transmitter emission path, test out the control voltage of amplifiers at different levels on the time point of the fixed switching of time-domain mode slip gauge;
B, the control voltage of different time switching point amplifiers at different levels, substep is added in the control end of corresponding amplifier, tests the signal level of transmitter output under the corresponding moment relevant voltage;
C, with comparing that the signal level that tests out and time domain module require, judge whether described signal level satisfies the requirement of time domain module.
Above-mentioned method of testing, wherein, whether decision is necessary to add attenuator to the transmitter delivery outlet according to the transmitter output signal watt level among the step B, if the test small-signal removes attenuator, otherwise adds attenuator.
Above-mentioned method of testing, wherein, among the step B, signal source or prime baseband signal are set to continuous emission mode.
Above-mentioned method of testing, wherein, amplifier is the device that is subjected to switch control, comprises bipolar transistor, field-effect transistor, integrated amplifier or attenuator etc.
The beneficial effect of the method for the invention is to utilize this method can whether satisfy the requirement of time domain template with the signal that general frequency spectrograph just can test out TD-SCDMA transmitter output more easily.
Description of drawings
Fig. 1 is the specification requirement figure of TD-SWCDMA system transmitter time domain template.
Embodiment
Be elaborated below in conjunction with the method for testing of accompanying drawing to a kind of TD-SCDMA transmitter On/Off time domain template of the present invention.
Transmitter On/Off time domain template as shown in Figure 1, stipulated that transmitter is a sub-image duration, have and be opened in the process of closing and be closed to unlatching, the requirement that transmitter output signal power should satisfy, promptly the A level of ordering should be not more than-82dBm, and the level that B is ordered should be not less than PdBm, and (PdBm refers to 90% of rated power, below identical), the level that C is ordered should be not less than PdBm, and the level that D is ordered should be not more than-42dBm, and the level that E is ordered should be not more than-82dBm.
Be without loss of generality, the control point of setting transmitter amplifiers at different levels be respectively a, b, c,
At first, on A shown in Figure 1, B, C, D, each time transfer point of E, utilize oscilloscope test respectively a, b, c ... corresponding voltage, A constantly the voltage of each point correspondence be Aa, Ab, Ac, Each point voltage that B is constantly corresponding be Ba, Bb, Bc, Each point voltage that C is corresponding constantly is Ca, Cb, Cc ...
Then, the mode of utilizing applied voltage the control point of the controller of transmitter amplifiers at different levels a, b, c ... making alive Aa, Ab, Ac ... signal source or prime baseband signal are set to continuous emission mode, the transmitter delivery outlet does not add attenuator, the power output P0 of test transmitter this moment.
Control point a, the b of the controller of transmitter amplifiers at different levels, c ... making alive Ba, Bb, Bc ..., signal source or prime baseband signal are set to continuous emission mode, and the transmitter delivery outlet will add attenuator, the power output P1 of test transmitter this moment.
Control point a, the b of the controller of transmitter amplifiers at different levels, c ... making alive Ca, Cb, Cc ..., signal source or prime baseband signal are set to continuous emission mode, and the transmitter delivery outlet will add attenuator, the power output P2 of test transmitter this moment.
Control point a, the b of the controller of transmitter amplifiers at different levels, c ... making alive Da, Db, Dc ..., signal source or prime baseband signal are set to continuous emission mode, and the transmitter delivery outlet does not add attenuator, the power output P3 of test transmitter this moment.
Control point a, the b of the controller of transmitter amplifiers at different levels, c ... making alive Ea, Eb, Ec ..., signal source or prime baseband signal are set to continuous emission mode, and the transmitter delivery outlet does not add attenuator, the power output P4 of test transmitter this moment.
At last, with the power P 0 that tests out, P1, P2, P3, P4 respectively with time domain template on A, B, C, D, the E corresponding power level of ordering compare, judge promptly whether the power that tests out meets the demands: if P0≤-82dBm, P1 〉=PdBm, P2 〉=PdBm, P3≤-42dBm, P4≤-82dBm, then transmitter satisfies the time domain template requirement, otherwise does not satisfy the requirement of time domain template.
Certainly; the present invention also can have other multiple enforcement example; under the situation that does not deviate from spirit of the present invention and essence thereof; being familiar with those of ordinary skill in the art ought can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (4)
1. the method for testing of a TD-SCDMA transmitter On/Off time domain template, described time domain template require transmitter outside transmission time slot in the official hour scope signal level drop to required value, it is characterized in that described method of testing comprises step:
A, according to the ON-OFF control circuit of amplifying devices at different levels in the transmitter emission path, test out the control voltage of amplifiers at different levels on the time domain template official hour switching point;
B, the control voltage of different time switching point amplifiers at different levels, substep is added in the control end of corresponding amplifier, tests the signal level of transmitter output under the corresponding moment relevant voltage;
C, the level of the signal level that tests out and time domain template regulation is compared, judge whether described signal level satisfies the requirement of time domain template.
2. according to the method for testing of the described TD-SCDMA transmitter of claim 1 On/Off time domain template, it is characterized in that, whether decision is necessary to add attenuator to the transmitter delivery outlet according to the transmitter output signal watt level among the step B, if the test small-signal removes attenuator, otherwise adds attenuator.
3. the method for testing of TD-SCDMA transmitter On/Off time domain template according to claim 1 is characterized in that, among the step B, signal source or prime baseband signal are set to continuous emission mode.
4. the method for testing of TD-SCDMA transmitter On/Off time domain template according to claim 1 is characterized in that, amplifier is all devices that are subjected to switch control, comprises bipolar transistor, field-effect transistor, integrated amplifier and attenuator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101277079A CN101072420B (en) | 2007-06-18 | 2007-06-18 | TD-SCDMA transmitter open/close time domain template testing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101277079A CN101072420B (en) | 2007-06-18 | 2007-06-18 | TD-SCDMA transmitter open/close time domain template testing method |
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| Publication Number | Publication Date |
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| CN101072420A CN101072420A (en) | 2007-11-14 |
| CN101072420B true CN101072420B (en) | 2010-12-08 |
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| CN2007101277079A Expired - Fee Related CN101072420B (en) | 2007-06-18 | 2007-06-18 | TD-SCDMA transmitter open/close time domain template testing method |
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| CN108632977B (en) * | 2017-03-24 | 2023-04-07 | 中兴通讯股份有限公司 | Power state transition method and device, terminal, storage medium and processor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1371222A (en) * | 2001-02-27 | 2002-09-25 | 华为技术有限公司 | Multiple-carrier power control device and method for wideband digital mobile communication system base station |
| CN1756114A (en) * | 2004-09-28 | 2006-04-05 | 北京信威通信技术股份有限公司 | Automatic power adjusting apparatus and method for repeater in TDD system |
| CN1848703A (en) * | 2006-04-20 | 2006-10-18 | 北京星河亮点通信软件有限责任公司 | TD-SCDMA terminal radio frequency consistency testing method |
| CN1960221A (en) * | 2006-09-30 | 2007-05-09 | 上海华为技术有限公司 | Channel simulator, channel simulation system, and channel simulation method |
-
2007
- 2007-06-18 CN CN2007101277079A patent/CN101072420B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1371222A (en) * | 2001-02-27 | 2002-09-25 | 华为技术有限公司 | Multiple-carrier power control device and method for wideband digital mobile communication system base station |
| CN1756114A (en) * | 2004-09-28 | 2006-04-05 | 北京信威通信技术股份有限公司 | Automatic power adjusting apparatus and method for repeater in TDD system |
| CN1848703A (en) * | 2006-04-20 | 2006-10-18 | 北京星河亮点通信软件有限责任公司 | TD-SCDMA terminal radio frequency consistency testing method |
| CN1960221A (en) * | 2006-09-30 | 2007-05-09 | 上海华为技术有限公司 | Channel simulator, channel simulation system, and channel simulation method |
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