CN1731714A - System and method for testing RF module upstream channel gain and isolation degree - Google Patents
System and method for testing RF module upstream channel gain and isolation degree Download PDFInfo
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- CN1731714A CN1731714A CNA2005100985536A CN200510098553A CN1731714A CN 1731714 A CN1731714 A CN 1731714A CN A2005100985536 A CNA2005100985536 A CN A2005100985536A CN 200510098553 A CN200510098553 A CN 200510098553A CN 1731714 A CN1731714 A CN 1731714A
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Abstract
The invention discloses a system and method for testing RF module up-channel gain and isolation. The inventive system comprises signal source with TD-SCDMA and testing devices. The testing devices comprise data conversion module, indicating module for received signal intensity and output module for test results. After confirming the basic RF module's up-channel basic gain G_ref with basic input power P_ref and corresponding basic receive signal intensity indication RSSI_ref, the signal source with TD-SCDMA transmits basic input power P_ref signal to up-channel of the RF module; according to output signal, the test devices will calculate current receive signal intensity and up-channel gain G_ref+ (RSSI_now-RSSI_ref) of the device module.
Description
Technical field
The present invention relates to a kind of test macro and method of radio-frequency module, in particular, relate to the gain of RF module upstream channel of a kind of test TD-SCDMA (Time Division-Synchronous Code Division Multiple Access, Time Division-Synchronous Code Division Multiple Access) and the system and method for isolation.
Background technology
At present, in production test or other test environment, the gain of RF module upstream channel and isolation all directly measure with frequency spectrograph.Shown in Figure of description 1, its test process is as follows:
At first, in the data feedback channel input port connection signal source of radio-frequency module, at the data feedback channel output port connection frequency spectrograph of radio-frequency module;
Then, the signal of signal source emission specified power is to the data feedback channel of radio-frequency module;
Afterwards, reading and be connected the performance number that shows on the radio-frequency module frequency spectrograph, is exactly the power of RF module upstream channel signal output;
At last, calculate the poor of the power output of data feedback channel of radio-frequency module and input power, just can obtain RF module upstream channel gain.
The data feedback channel isolation of radio-frequency module is exactly power output poor of power output and the data feedback channel that does not have the signal input of radio-frequency module data feedback channel that signal input is arranged.
Whole process need signal source and two instrument co-ordinations of frequency spectrograph of test, and in production test procedure, for production efficiency is provided, the gain of data feedback channel and isolation all are to measure under independent environment, in this case, just need more frequency spectrograph, increased production cost.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of and realizes the gain of testing RF module upstream channel and the method for isolation with simple system, the above-mentioned two kinds of parameters of test can be carried out under same environment among the present invention, saved frequency spectrograph, reduced production costs greatly.
System of the present invention comprises as lower device:
The signal source of band TD-SCDMA option is used for providing input power to the data feedback channel input port of tested radio-frequency module;
Received signal intensity indication testing equipment is used for calculating the signal strength signal intensity indication according to tested radio-frequency module output signal, and this equipment comprises:
The IQ data conversion module is used for converting the output signal of tested radio-frequency module to the IQ two paths of data;
The received signal strength indication is calculated module, is used for calculating the indication of received signal intensity according to described IQ two paths of data;
Test result output module is used for the received signal intensity indication result output that calculates described.
The present invention and then a kind of method of testing RF module upstream channel gain is provided comprises the steps:
Determine the data feedback channel benchmark gain G _ ref of benchmark radio-frequency module under benchmark input power P_ref and corresponding benchmark received signal intensity indication RSSI_ref,
Signal source by described band TD-SCDMA option is the signal of benchmark input power P_ref to the appointment data feedback channel transmitted power of tested radio-frequency module;
Calculate current received signal intensity indication RSSI_now by described testing equipment according to the output signal of tested radio-frequency module;
The upstream channel gain that calculates the equipment under test module is G_ref+ (RSSI_now-RSSI_ref).
The present invention and then a kind of method of testing RF module upstream channel isolation is provided comprises the steps:
Signal source by described band TD-SCDMA option sends signal to the appointment data feedback channel j of tested radio-frequency module;
Calculate the current received signal intensity indication RSSI_now_j that specifies data feedback channel j by described testing equipment according to the output signal of each data feedback channel of tested radio-frequency module, with the received signal intensity indication RSSI_ref_ (m) of each other data feedback channel;
Calculating the data feedback channel j of tested radio-frequency module and the isolation of each other data feedback channel is RSSI_now_j-RSSI_ref_ (m).
The mode that the present invention adopts simple system to replace original use frequency spectrograph to test has reduced the use of test instrumentation, has improved production efficiency, has saved production cost.
Description of drawings
Fig. 1 is an employed test macro in the prior art;
Fig. 2 is the embodiment schematic diagram of test macro described in the present invention.
Embodiment
Now in conjunction with the accompanying drawings structure of the present invention and operation principle are described further:
Shown in Figure of description 2, the embodiment of system of the present invention can comprise the signal source 1 and the received signal intensity indication testing equipment 4 of band TD-SCDMA option.
The signal source 1 of described band TD-SCDMA option is used for providing input power to the data feedback channel input port of tested radio-frequency module 2;
Described received signal intensity indication testing equipment 4 is used for calculating the signal strength signal intensity indication according to the output signal of tested radio-frequency module 2 output ports, and this equipment comprises:
The IQ data conversion module is used for converting the output signal of tested radio-frequency module 2 to the IQ two paths of data;
The received signal strength indication is calculated module, is used for calculating the indication of received signal intensity according to described IQ two paths of data;
Test result output module is used for the received signal intensity indication result output that calculates described.
Received signal intensity indication testing equipment 4 recited above can use existing intermediate frequency equipment to replace in actual production, just calculates indication of received signal intensity and test result output function in order to realize, needs to be equipped with corresponding software module.
Test result output module described in the present invention can be integrated in the testing equipment 4 and output test result, also can be independent of testing equipment 4 outer settings separately, utilize external other equipment to output test result, for example can use a computer 5 shows and outputs test result, and only needs in the use with a data cable 103 computer 5 is linked to each other with testing equipment 4.
Tested radio-frequency module 2 described in the present invention is in its working range, data feedback channel output power signal and input power are linear, therefore, can draw, the IQ two paths of data of the upward signal output of the tested radio-frequency module 2 of reflection of testing equipment 4 conversions is also linear with input power, that is to say that the indication of received signal intensity can identify the linear change of output signal power.
The embodiment of the method for the upstream channel gain of the tested radio-frequency module 2 of test of the present invention is as follows:
Step 1 is obtained reference data G_ref, P_ref;
The detailed process of this step is as follows:
Need two instrument when obtaining above-mentioned reference data, the signal source 1 and the frequency spectrograph 3 of band TD-SCDMA option connect shown in the by specification accompanying drawing 1;
Signal source 1 by described band TD-SCDMA option sends the data feedback channel input port of the upward signal of specified power P_ref to radio-frequency module 2;
Read the output signal power of the data feedback channel of radio-frequency module 2 from the frequency spectrograph 3 of the data feedback channel output port that is connected radio-frequency module 2;
Calculate the poor of the output signal power of data feedback channel of radio-frequency module 2 and input signal, draw the upstream channel gain G_ref of this radio-frequency module 2.
Step 2: obtain reference data RSSI_ref;
The detailed process of this step is as follows:
By specification accompanying drawing 2 is built environment again;
Signal source 1 by described band TD-SCDMA option sends the data feedback channel input port of the upward signal of specified power P_ref to radio-frequency module 2;
The testing equipment 4 that is connected to the data feedback channel output port of radio-frequency module 2 converts the up output signal of radio-frequency module 2 to the IQ two paths of signals, calculate received signal indication intensity RSSI_re, send to computer 5, can obtain the received signal intensity indication RSSI_ref of the upward signal of this radio-frequency module 2 from computer 5.
So just obtain to test given data P_ref, G_ref and the RSSI_ref of necessity of other tested radio-frequency modules 2, can enter step 3, tested the upstream channel gain of other tested radio-frequency modules 2.
Step 3: the upstream channel gain of testing tested radio-frequency module 2;
Keep the environment of Figure of description 2, change tested radio-frequency module 2 into, the signal source 1 of keeping band TD-SCDMA option sends the data feedback channel input port of the upward signal of specified power P_ref to tested radio-frequency module 2, obtains the received signal intensity indication RSSI_now of the upward signal of this radio-frequency module from computer 5;
The upstream channel gain of tested radio-frequency module 2 is G_ref+ (RSSI_now-RSSI_ref).
When the current received signal intensity indication of calculating RSSI_now,, be the mean value of getting in a period of time for fear of the interference of transient change.
The embodiment of the method for the data feedback channel isolation of testing RF module 2 of the present invention is as follows:
Because the data feedback channel isolation of radio-frequency module 2 is that the data feedback channel of input signal and the difference of the received signal intensity indication of the data feedback channel that does not have input signal are arranged, and does not therefore need to test in advance some given datas.
The concrete steps of this process are as follows:
By specification accompanying drawing 2 is built test environment, and the appointment data feedback channel j to tested radio-frequency module 2 signals by the signal source 1 that has the TD-SCDMA option;
Testing equipment 4 converts the upward signal of all data feedback channels of tested radio-frequency module 2 to the IQ two paths of signals, calculates the received signal intensity indication RSSI_now (x) of the upward signal of each data feedback channel;
The data feedback channel j of tested radio-frequency module 2 and the isolation of other data feedback channels are RSSI_now_j-RSSI_ref_ (m), and RSSI_ref_ (m) is the received signal intensity indication of other data feedback channels.
When calculating received signal intensity indication RSSI_now (x),, need get the mean value in a period of time for fear of the interference of transient change.
Claims (8)
1, the system of a kind of testing RF module upstream channel gain and isolation comprises the signal source of being with the TD-SCDMA option, is used for providing input power to the data feedback channel input port of tested radio-frequency module, it is characterized in that, also comprises:
Received signal intensity indication testing equipment is used for calculating the signal strength signal intensity indication according to tested radio-frequency module output signal, and this equipment comprises:
The IQ data conversion module is used for converting the output signal of tested radio-frequency module to the IQ two paths of data;
The received signal strength indication is calculated module, is used for calculating the indication of received signal intensity according to described IQ two paths of data;
Test result output module is used for the received signal intensity indication result output that calculates described.
2, the system as claimed in claim 1 is characterized in that, described output module is a computer, is used for showing outputing test result.
3, a kind of method of utilizing the described system testing RF module upstream channel gain of claim 1 is characterized in that, comprises the steps:
Determine the data feedback channel benchmark gain G _ ref of benchmark radio-frequency module under benchmark input power P_ref and corresponding benchmark received signal intensity indication RSSI_ref;
Signal source by described band TD-SCDMA option is the signal of benchmark input power P_ref to the appointment data feedback channel transmitted power of tested radio-frequency module;
Calculate current received signal intensity indication RSSI_now by described testing equipment according to the output signal of tested radio-frequency module;
The upstream channel gain that calculates the equipment under test module is G_ref+ (RSSI_now-RSSI_ref).
As the method for testing RF module upstream channel gain as described in the claim 3, it is characterized in that 4, the current received signal intensity indication of described calculating RSSI_now step is the mean value of getting in a period of time.
5, the method for testing RF module upstream channel gain as claimed in claim 3 is characterized in that, the data feedback channel benchmark gain G _ ref step of described definite benchmark radio-frequency module under benchmark input power P_ref comprises the steps:
Signal source by described band TD-SCDMA option sends the data feedback channel input port of the signal of reference power P_ref to the benchmark radio-frequency module;
Read the output signal power of the data feedback channel of benchmark radio-frequency module from the frequency spectrograph of the data feedback channel output port that is connected the benchmark radio-frequency module;
Calculate the poor of the output signal power of data feedback channel of benchmark radio-frequency module and input signal power, draw the data feedback channel benchmark gain G _ ref of this benchmark radio-frequency module.
As the method for testing RF module upstream channel gain as described in the claim 2, it is characterized in that 6, the benchmark received signal intensity indication RSSI_ref step of described definite benchmark radio-frequency module under benchmark input power P_ref comprises the steps:
Signal source by described band TD-SCDMA option sends the data feedback channel input port of the signal of reference power P_ref to the benchmark radio-frequency module;
Calculate benchmark received signal intensity indication RSSI_ref by described testing equipment according to the output signal of the data feedback channel output port of benchmark radio-frequency module.
7, a kind of method of utilizing the described system testing RF module upstream channel of claim 1 isolation is characterized in that, comprises the steps:
Signal source by described band TD-SCDMA option sends signal to the appointment data feedback channel j of tested radio-frequency module;
Calculate the current received signal intensity indication RSSI_now_j that specifies data feedback channel j by described testing equipment according to the output signal of each data feedback channel of tested radio-frequency module, with the received signal intensity indication RSSI_ref_ (m) of each other data feedback channel;
Calculating the data feedback channel j of tested radio-frequency module and the isolation of each other data feedback channel is RSSI_now_j-RSSI_ref_ (m).
As the method for testing RF module upstream channel isolation as described in the claim 7, it is characterized in that 8, described calculating RSSI_now_j and RSSI_ref_ (m) step are the mean value of getting in a period of time.
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| CN2005100985536A CN1731714B (en) | 2005-09-02 | 2005-09-02 | Method for testing RF module upstream channel gain and isolation degree |
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| CN2005100985536A CN1731714B (en) | 2005-09-02 | 2005-09-02 | Method for testing RF module upstream channel gain and isolation degree |
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| CN1731714B CN1731714B (en) | 2012-05-09 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101685125A (en) * | 2008-09-22 | 2010-03-31 | 北京航空航天大学 | Method of testing isolation between wire cables by adopting harmonic waves |
| CN101119165B (en) * | 2006-08-03 | 2011-03-16 | 大唐移动通信设备有限公司 | Method and apparatus for testing downlink forming gain of time-division synchronous code division multiple access TD-SCDMA intelligent antenna |
| CN101335963B (en) * | 2007-06-26 | 2011-08-10 | 中兴通讯股份有限公司 | Receiving level strength indication computing method and apparatus |
| CN101282143B (en) * | 2007-04-05 | 2012-09-05 | 大唐移动通信设备有限公司 | Apparatus and method for measuring radio frequency emitter power |
| CN113302855A (en) * | 2019-01-15 | 2021-08-24 | 莱特普茵特公司 | System and method for testing data packet signal transceivers |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6721548B1 (en) * | 1999-12-22 | 2004-04-13 | Koninklijke Philips Electronics N.V. | High dynamic range low ripple RSSI for zero-IF or low-IF receivers |
-
2005
- 2005-09-02 CN CN2005100985536A patent/CN1731714B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101119165B (en) * | 2006-08-03 | 2011-03-16 | 大唐移动通信设备有限公司 | Method and apparatus for testing downlink forming gain of time-division synchronous code division multiple access TD-SCDMA intelligent antenna |
| CN101282143B (en) * | 2007-04-05 | 2012-09-05 | 大唐移动通信设备有限公司 | Apparatus and method for measuring radio frequency emitter power |
| CN101335963B (en) * | 2007-06-26 | 2011-08-10 | 中兴通讯股份有限公司 | Receiving level strength indication computing method and apparatus |
| CN101685125A (en) * | 2008-09-22 | 2010-03-31 | 北京航空航天大学 | Method of testing isolation between wire cables by adopting harmonic waves |
| CN101685125B (en) * | 2008-09-22 | 2013-10-09 | 北京航空航天大学 | Method of testing isolation between wire cables by adopting harmonic waves |
| CN113302855A (en) * | 2019-01-15 | 2021-08-24 | 莱特普茵特公司 | System and method for testing data packet signal transceivers |
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| CN1731714B (en) | 2012-05-09 |
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