CN101051064A - Device and method for measuring power amplifier performance parameter - Google Patents
Device and method for measuring power amplifier performance parameter Download PDFInfo
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- CN101051064A CN101051064A CN 200610157179 CN200610157179A CN101051064A CN 101051064 A CN101051064 A CN 101051064A CN 200610157179 CN200610157179 CN 200610157179 CN 200610157179 A CN200610157179 A CN 200610157179A CN 101051064 A CN101051064 A CN 101051064A
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Abstract
A device used for measuring performance parameters of power amplifier consists of function operation module for carrying out operation according to preset function, mutual correlator module for carrying out mutual correlation operation on output signal, nonlinear output module for carrying out normalization treatment on mode maximum value of output signal, self-correlator module for carrying out self-correlation calculation on output signal, memory length output module for carrying out judgment on output signal and for outputting memory length signal.
Description
Technical field
The present invention relates to the signal processing technology field, especially relate to a kind of apparatus and method of measuring power amplifier performance parameter.
Background technology
Power amplifier (abbreviation power amplifier) is a kind of application electronic devices and components very widely, and especially when power amplifier was applied in the communications field, it was used for amplifying various radiofrequency signals, with the requirement that reaches emission or receive.
The performance of weighing power amplifier has many indexs, as nonlinearity, memory effect length, output power, processing bandwidth or the like.For these indexs, more existing relevant method of testing and the devices of industry, but for wherein two important indicators of power amplifier: nonlinearity and memory effect length (or memory span), industry but can only be carried out qualitative or be measured accurately inadequately at present.
Specifically, for the nonlinearity of power amplifier, traditional method of testing is:
At first, import the test signal of certain bandwidth to power amplifier;
Then, observe the neighboring trace leakiness of its output signal.
Such as, in the test signal of a single carrier WCDMA of the input end of power amplifier input, observe the spectrum component of the output signal of power amplifier output terminal at IMD3, IMD5 place.
Though this method energy quantitative test non-linearity of power amplifier degree, but analysis result has only reflected the comprehensive nonlinearity of power amplifier, such as the output spectrum component at IMD3 place not only by non-linear the causing in 3 rank of power amplifier, also be by 5 rank non-linear and more high-order nonlinear caused jointly, so this method can not accurately be measured each rank nonlinearity of power amplifier.
As for the memory span of power amplifier, the method for testing that industry is traditional is:
Be positioned at its bandwidth of operation and have certain frequency two-tone signal at interval to one of power amplifier input, as the 1MHz double-tone at interval, observe the IMD3+ of the output signal of power amplifier output terminal, the difference of IMD3-then, if difference is big more, represent that then the memory effect degree of power amplifier is just big more.
This method can only be carried out observational measurement to the memory span performance parameter of power amplifier, and can not carry out quantitative measurment accurately.
Based on this, in order to measure the performance parameter of power amplifier accurately, especially to the nonlinearity and the memory span of the power amplifier that can't accurately measure at present, then can estimate the combination property of power amplifier for us, better the appropriate power amplifier of practicality in engineering reality has very significant meaning.
Summary of the invention
The objective of the invention is to propose a kind of apparatus and method of measuring power amplifier performance parameter, the especially nonlinearity and the memory span of the power amplifier that still can't accurately measure at present industry provide the apparatus and method of accurate measurement.
For addressing the above problem, the present invention discloses a kind of device of measuring power amplifier performance parameter, comprising:
The functional operation module is carried out signal Processing to the test signal of power input amplifier according to predetermined function;
The cross-correlator module is carried out the signal Processing of computing cross-correlation with the test output signal of the output signal of functional operation module output terminal and power amplifier output terminal, exports both and postpones degree of correlation compare result signal constantly at each;
The nonlinearity output module, the degree of correlation compare result signal of reception cross-correlator module output terminal carries out normalized signal to the mould maximal value of this signal and handles each rank nonlinear parameter signal of output power amplifier.
Wherein, described predetermined function is a nonlinear function, and described functional operation module is carried out nonlinear signal Processing to the test signal of power input amplifier.
More preferably, the present invention's device of measuring power amplifier performance parameter also comprises:
The autocorrelator module, the test output signal of received power amplifier out, and this signal carried out auto-correlation computation, export this signal from postponing the consequential signal of the degree of correlation constantly in each;
The memory span output module is received from the signal that correlator block is exported, and this signal results is judged, extracts the memory span signal and the output of power amplifier.
Wherein, described memory span output module specifically comprises:
Remember the threshold value submodule, be used for the memory threshold value of setting power amplifier;
Judge submodule, with the memory threshold of setting in the consequential signal of autocorrelator module output and the memory threshold value submodule, if consequential signal is greater than the memory threshold value, then the memory span signal is output as 1, otherwise the memory span signal is output as 0;
The judged result output sub-module will be judged the judged result output of submodule.
Correspondingly, the present invention also discloses a kind of method of measuring power amplifier performance parameter, comprising:
Steps A, to test signal of power amplifier input;
Step B, described test signal is carried out signal Processing according to predetermined function;
The test result signal of step C, the signal after step B handled and power amplifier output carries out the signal Processing of computing cross-correlation, obtains both and postpones the degree of correlation constantly consequential signal relatively at each;
Step D, the mould maximal value of the consequential signal of described degree of correlation comparison is carried out normalized signal handle, obtain each rank nonlinear parameter signal of power amplifier.
Wherein, described predetermined function is a nonlinear function, and described step B is for to carry out nonlinear signal Processing to the test signal of power input amplifier.
Correspondingly, the present invention also discloses a kind of method of measuring power amplifier performance parameter, comprising:
Steps A, to test signal of power amplifier input;
Step B, the test output signal that power amplifier is exported carry out auto-correlation computation, obtain this signal from postponing the consequential signal of the degree of correlation constantly in each;
Step C, this signal results is judged, extracted the memory span and the output of power amplifier.
More preferably, described step C specifically comprises:
With the consequential signal of step B output and the memory threshold of setting, greater than the memory threshold value, then the memory span signal is output as 1 as if consequential signal, otherwise the memory span signal is output as 0.
Compared with prior art, the present invention has following beneficial effect:
The present invention utilizes the time-domain analysis method, the nonlinearity of the power amplifier that accurate measurement industry still can't accurately measure at present and the apparatus and method of memory span have been provided, nonlinearity and memory span to power amplifier that can be accurate, quantitative be carried out the performance parameter measurement, therefore, the present invention provides strong instrument for the performance parameter of accurately measuring power amplifier, estimate the combination property of power amplifier for us, better the appropriate power amplifier of practicality in engineering reality has very significant meaning.
Description of drawings
Fig. 1 is the synoptic diagram that the present invention measures a preferred embodiment of device of power amplifier performance parameter;
Fig. 2 is the measurement result synoptic diagram that the present invention measures the non-linearity of power amplifier degree;
Fig. 3 is the measurement result synoptic diagram that the present invention measures the power amplifier memory span;
Fig. 4 is the schematic flow sheet that the present invention measures a preferred embodiment of method of power amplifier performance parameter;
Fig. 5 is the schematic flow sheet that the present invention measures another preferred embodiment of method of power amplifier performance parameter.
Embodiment
The present invention is directed to the deficiency of traditional test power amplifier performance parameter, especially the nonlinearity of the power amplifier that can't accurately measure and memory span, the present invention utilizes the time-domain analysis method, and a kind of measurement mechanism of measuring non-linearity of power amplifier degree and memory span is provided.
Please refer to shown in Figure 1ly, measure the synoptic diagram of a preferred embodiment of device of power amplifier performance parameter for the present invention.Measurement mechanism 100 of the present invention comprises: functional operation module 110, cross-correlator module 120, nonlinearity output module 130, autocorrelator module 140 and memory span output module 150.
Specifically:
Described functional operation module 110 is carried out signal Processing to the test signal of power input amplifier 200 according to predetermined function; Wherein, described predetermined function is a nonlinear function, and the test signal of 110 pairs of power input amplifiers 200 of described functional operation module is carried out nonlinear signal Processing;
Fig. 2 is rank, power amplifier 2 rank to 10 nonlinearity synoptic diagram, and what horizontal ordinate was 2 rank to 10 rank is non-linear, and ordinate is each rank nonlinearity, dimensionless, and by normalized, the maximal value of each rank nonlinearity is 1.
The even nonlinearity is 0 among Fig. 3, and this is because 200 pairs of non-linear amplifications of signal even of power amplifier drop on the result who analyzes outside the bandwidth; Through normalized, 3 times nonlinearity is 1, and promptly maximum, 5 nonlinearities, 7 nonlinearities, 9 nonlinearities reduce successively, and 9 times nonlinearity is smaller.
In addition, please refer again to shown in Figure 1ly, measurement mechanism 100 of the present invention also comprises:
Autocorrelator module 140, the test output signal of received power amplifier 200 output terminals, and this signal carried out auto-correlation computation, export this signal from postponing the consequential signal of the degree of correlation constantly in each;
Memory span output module 150 receives the signal that described autocorrelator module 140 is exported, and this signal results is judged, extracts the memory span signal and the output of power amplifier 200.
Wherein, described memory span output module 150 specifically comprises (not illustrating among the figure):
Remember the threshold value submodule, be used for the memory threshold value of setting power amplifier;
Judge submodule, with the memory threshold of setting in the consequential signal of autocorrelator module output and the memory threshold value submodule, if consequential signal is greater than the memory threshold value, then the memory span signal is output as 1, otherwise the memory span signal is output as 0;
The judged result output sub-module will be judged the judged result output of submodule.
Please refer to shown in Figure 3ly, is the measurement result synoptic diagram that the present invention measures the power amplifier memory span.Its horizontal ordinate is a time shaft, and ordinate is the degree of correlation, dimensionless.Can see that from Fig. 3 it is 1 that described memory span output module 150 output signals have 5 numerical value continuously, this is 5 with regard to the memory span that shows this power amplifier 200.
Accordingly, the invention also discloses a kind of method of measuring power amplifier performance parameter, please refer to shown in Figure 4ly, be a kind of schematic flow sheet of measuring a preferred embodiment of non-linearity of power amplifier degree performance parameter disclosed by the invention, specifically comprise:
Step s410, to test signal of power amplifier input;
Step s420, described test signal is carried out signal Processing according to predetermined function;
The test result signal of step s430, the signal after step s420 handled and power amplifier output carries out the signal Processing of computing cross-correlation, obtains both and postpones the degree of correlation constantly consequential signal relatively at each;
Step s440, the mould maximal value of the consequential signal of described degree of correlation comparison is carried out normalized signal handle, obtain each rank nonlinear parameter signal of power amplifier.
Wherein, described predetermined function is a nonlinear function, and described step s420 is for to carry out nonlinear signal Processing to the test signal of power input amplifier.
See also shown in Figure 5ly, the present invention also discloses a kind of method of measuring power amplifier memory span performance parameter, specifically comprises:
Step s510, to test signal of power amplifier input;
Step s520, the test output signal that power amplifier is exported carry out auto-correlation computation, obtain this signal from postponing the consequential signal of the degree of correlation constantly in each;
Step s530, this signal results is judged, extracted the memory span and the output of power amplifier.
More preferably, described step s530 specifically comprises:
With the consequential signal of step s520 output and the memory threshold of setting, greater than the memory threshold value, then the memory span signal is output as 1 as if consequential signal, otherwise the memory span signal is output as 0.
In sum, compared with prior art, the present invention has following beneficial effect:
The present invention utilizes Time Domain Analysis, has provided the Measurement accuracy industry and still can't accurately measure at present The nonlinearity of power amplifier and the apparatus and method of memory span, can be accurate, quantitative to merit The nonlinearity of rate amplifier and memory span are carried out the performance parameter measurement, and therefore, the present invention accurately surveys The performance parameter of amount power amplifier provides powerful, for we estimate the combination property of power amplifier, Better the appropriate power amplifier of practicality in engineering reality has very great meaning.
Claims (8)
1, a kind of device of measuring power amplifier performance parameter is characterized in that, comprising:
The functional operation module is carried out signal Processing to the test signal of power input amplifier according to predetermined function;
The cross-correlator module is carried out the signal Processing of computing cross-correlation with the test output signal of the output signal of functional operation module output terminal and power amplifier output terminal, exports both and postpones degree of correlation compare result signal constantly at each;
The nonlinearity output module, the degree of correlation compare result signal of reception cross-correlator module output terminal carries out normalized signal to the mould maximal value of this signal and handles each rank nonlinear parameter signal of output power amplifier.
2, the device of measurement power amplifier performance parameter according to claim 1 is characterized in that, described predetermined function is a nonlinear function, and described functional operation module is carried out nonlinear signal Processing to the test signal of power input amplifier.
3, the device of measurement power amplifier performance parameter according to claim 1 is characterized in that, also comprises:
The autocorrelator module, the test output signal of received power amplifier out, and this signal carried out auto-correlation computation, export this signal from postponing the consequential signal of the degree of correlation constantly in each;
The memory span output module is received from the signal that correlator block is exported, and this signal results is judged, extracts the memory span signal and the output of power amplifier.
4, the device of measurement power amplifier performance parameter according to claim 3 is characterized in that, described memory span output module specifically comprises:
Remember the threshold value submodule, be used for the memory threshold value of setting power amplifier;
Judge submodule, with the memory threshold of setting in the consequential signal of autocorrelator module output and the memory threshold value submodule, if consequential signal is greater than the memory threshold value, then the memory span signal is output as 1, otherwise the memory span signal is output as 0;
The judged result output sub-module will be judged the judged result output of submodule.
5, a kind of method of measuring power amplifier performance parameter is characterized in that, comprising:
Steps A, to test signal of power amplifier input;
Step B, described test signal is carried out signal Processing according to predetermined function;
The test result signal of step C, the signal after step B handled and power amplifier output carries out the signal Processing of computing cross-correlation, obtains both and postpones the degree of correlation constantly consequential signal relatively at each;
Step D, the mould maximal value of the consequential signal of described degree of correlation comparison is carried out normalized signal handle, obtain each rank nonlinear parameter signal of power amplifier.
6, the method for measurement power amplifier performance parameter according to claim 5 is characterized in that, described predetermined function is a nonlinear function, and described step B is for to carry out nonlinear signal Processing to the test signal of power input amplifier.
7, a kind of method of measuring power amplifier performance parameter is characterized in that, comprising:
Steps A, to test signal of power amplifier input;
Step B, the test output signal that power amplifier is exported carry out auto-correlation computation, obtain this signal from postponing the consequential signal of the degree of correlation constantly in each;
Step C, this signal results is judged, extracted the memory span and the output of power amplifier.
8, the method for measurement power amplifier performance parameter according to claim 7 is characterized in that, described step C specifically comprises:
With the consequential signal of step B output and the memory threshold of setting, greater than the memory threshold value, then the memory span signal is output as 1 as if consequential signal, otherwise the memory span signal is output as 0.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101571797A CN100526894C (en) | 2006-11-28 | 2006-11-28 | Device and method for measuring power amplifier performance parameter |
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| CNB2006101571797A CN100526894C (en) | 2006-11-28 | 2006-11-28 | Device and method for measuring power amplifier performance parameter |
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| CN101051064A true CN101051064A (en) | 2007-10-10 |
| CN100526894C CN100526894C (en) | 2009-08-12 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628897A (en) * | 2011-12-05 | 2012-08-08 | 中国科学院微电子研究所 | Three-order intermodulation test method based on N1dB compression point and N2dB compression point |
| CN106453170A (en) * | 2016-09-27 | 2017-02-22 | 工业和信息化部电信研究院 | Signal nonlinear time-domain measurement and simulation method and application |
| CN109387718A (en) * | 2018-12-07 | 2019-02-26 | 成都精位科技有限公司 | UWB amplifier performance detection method and system |
-
2006
- 2006-11-28 CN CNB2006101571797A patent/CN100526894C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628897A (en) * | 2011-12-05 | 2012-08-08 | 中国科学院微电子研究所 | Three-order intermodulation test method based on N1dB compression point and N2dB compression point |
| CN102628897B (en) * | 2011-12-05 | 2014-03-26 | 中国科学院微电子研究所 | Three-order intermodulation test method based on N1dB compression point and N2dB compression point |
| CN106453170A (en) * | 2016-09-27 | 2017-02-22 | 工业和信息化部电信研究院 | Signal nonlinear time-domain measurement and simulation method and application |
| CN106453170B (en) * | 2016-09-27 | 2019-05-17 | 工业和信息化部电信研究院 | The measurement of signal nonlinear time-domain and analogy method and application |
| CN109387718A (en) * | 2018-12-07 | 2019-02-26 | 成都精位科技有限公司 | UWB amplifier performance detection method and system |
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| Publication number | Publication date |
|---|---|
| CN100526894C (en) | 2009-08-12 |
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