CN103336450B - A kind of control method based on power amplifier Auto-Test System - Google Patents
A kind of control method based on power amplifier Auto-Test System Download PDFInfo
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Abstract
The invention provides and a kind of control method based on power amplifier Auto-Test System is provided, be applied to the test of radio-frequency (RF) power amplification equipment, its technical essential is after preliminary adjustment input degree of modulation and power input, adopts rollback mode by half to adjust input degree of modulation and power input.This control method calculates simple, and adjustment number of times is few, and Adjustment effect is good, and approximation accuracy is high, and output valve can be avoided to shake the situation of the value that but cannot achieve the goal always; Be applicable to the radio-frequency (RF) power amplification equipment of Multiple Type, versatility is good.
Description
Technical field
The present invention relates to power amplifier field, particularly a kind of control method based on power amplifier Auto-Test System.
Background technology
At automation field, control system by changing input thus making the output value that achieves the goal be a kind of conventional means, but does not have accurate mathematical description between the output of some control system and input, and therefore such control system is difficult to control quickly and accurately.Such as power amplifier Auto-Test System, power amplifier Auto-Test System is made up of PC, control panel, radio-frequency signal source, frequency spectrograph, comprehensive test instrument and tested radio-frequency (RF) power amplification equipment.This system is for testing the radio-frequency (RF) power amplification equipment of Multiple Type, one of them test is the input value of power input by changing radio-frequency (RF) power amplification equipment and the input value of input degree of modulation, and the output valve of output degree of modulation of radio-frequency (RF) power amplification equipment and the output valve of degree of distortion are achieved the goal value.Owing to needing the radio-frequency (RF) power amplification equipment testing Multiple Type, the radio-frequency (RF) power amplification equipment of different model, relation between input quantity and output quantity is different, therefore the corresponding relation between output quantity and input quantity is complicated and changeable, there is no accurate mathematical description, can not calculate according to the difference between output quantity and input quantity or ratio and be applicable to various model radio-frequency (RF) power amplification equipment, accurate step value, therefore, such control system often adopts three kinds of methods of controlling now: the first, make input variable with minimum step change, order exports Step wise approximation object value, this method advantage is that algorithm is simple, and applicability is wide, but shortcoming needs the number of times of adjustment too many, and efficiency is low, the second, according to the ratio exported between object value and the absolute value of difference, divide multiple stepping grade, order exports Step wise approximation object value, but this method likely makes output repeatedly shake about object value, even export and likely shake the value that but cannot achieve the goal always, the third, use pid algorithm, but pid algorithm is comparatively complicated, and this algorithm needs a large amount of empirical parameter, for the more doubt occasion of parameter, this algorithm development, debug process are longer, and the input change that this algorithm once adjusts may very greatly, likely radio frequency power amplifying device causes damage.Therefore, existing test macro ubiquity the shortcomings such as the low or poor universality of efficiency.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of control method based on power amplifier Auto-Test System, this control method calculates simple, adjustment number of times is few, and Adjustment effect is good, and approximation accuracy is high, be applicable to the radio-frequency (RF) power amplification equipment of Multiple Type, versatility is good.
In order to achieve the above object, the present invention adopts following technical scheme: a kind of control method based on power amplifier Auto-Test System, is characterized in that, comprise the following steps:
The first step, the initial setting input input value A of degree of modulation and the input value B of power input;
Second step, the input input input value A of degree of modulation and the input value B of power input, detects and exports the output valve CA of degree of modulation and the output valve CB of degree of distortion;
3rd step, calculate the relation of the output valve CA exporting degree of modulation and the object value TB exporting the object value TA of degree of modulation and the output valve CB of degree of distortion and degree of distortion: if the output valve CA=exporting degree of modulation exports the object value TA of degree of modulation, and the object value TB of the output valve CB=degree of distortion of degree of distortion, then terminate; Otherwise carry out the 4th step;
4th step, calculates the object value TA that the ratio R A=exporting degree of modulation exports the output valve CA/ output degree of modulation of degree of modulation: if during RA >=0.7, skip to the 5th step; If during RA < 0.7, the preliminary adjustment input input value A of degree of modulation and the input value B of power input, then skips to second step;
5th step, judges the size of RA: if during RA < 0.9 or RA > 1.1, performs the 5th step a; If RA >=0.9 and RA≤1.1 time, perform the 5th step b;
5th step a, calculate the input value A of new input degree of modulation, the input value A of input degree of modulation is the ratio R A of object value TA divided by output degree of modulation of input degree of modulation, and the input value A=namely inputting degree of modulation inputs the ratio R A of the object value TA/ output degree of modulation of degree of modulation; Then the 6th step is skipped to;
5th step b, comprises following little step:
5th step b1, calculates the object value TA that the difference DA=exporting degree of modulation exports the output valve CA-output degree of modulation of degree of modulation; If DA=0, then skip to the 6th step; Otherwise carry out the 5th step b2;
5th step b2, according to the different situations of DA, draws the step value SA of input degree of modulation by following four kinds of modes:
(1) if the absolute value of DA | DA|≤DA closes on value, then: if SA=0.1 during DA < 0; If SA=-0.1 during DA > 0;
(2) if the absolute value of DA | DA| > DA closes on value, and DA < 0, then by the interval [0.9 of RA, 1.0) several RA grades are divided into, at the interval [0.1 of SA, 2] extract several SA level value in, the quantity of SA level value is identical with the quantity of RA grade, the corresponding SA level value of each RA grade; The assignment method of SA is, determines RA grade according to the size of RA, determines corresponding SA level value;
(3) if the absolute value of DA | DA| > DA closes on value, DA > 0, and this is first time assignment SA, by the interval (1.0 of RA, 1.1] be divided into several RA grades, in the interval [0.1,2] of SA, extract several SA level value, the quantity of SA level value is identical with the quantity of RA grade, the corresponding SA level value of each RA grade; The assignment method of SA is, determines RA grade according to the size of RA, determines corresponding SA level value;
(4) if the absolute value of DA | DA| > DA closes on value, DA > 0, and this is not first time assignment SA, then SA is 1/2 of existing SA, and symbol negate, i.e. SA=-SA/2;
5th step b3, the object value TB of the output valve CB-degree of distortion of the difference DB=degree of distortion of calculated distortion degree; If DB < DB setting value, then SA=k × SA, k are scale factor, k < 1, then carry out the 5th step b4; If DB >=DB setting value, then directly carry out the 5th step b4;
5th step b4, upgrades the input value A=A+SA of input degree of modulation;
6th step, the object value TB of the output valve CB-degree of distortion of the difference DB=degree of distortion of calculated distortion degree; If DB=0, then skip to second step; Otherwise carry out the 7th step;
7th step, according to the different situations of DB, draws the step value SB of power input by following four kinds of modes:
(1) if the absolute value of DB | DB|≤DB closes on value, if then DB < 0 time SB=0.1dB, if SB=-0.1dB during DB > 0;
(2) if the absolute value of DB | DB| > DB closes on value, and DB < 0, then SB value between 0.1dB ~ 1dB;
(3) if the absolute value of DB | DB| > DB closes on value, DB > 0, and this is first time assignment SB, then SB value between (-0.1dB) ~ (-1dB);
(4) if the absolute value of DB | DB| > DB closes on value, DB > 0, and this is not first time assignment SB, then SB is 1/2 of existing SB, and symbol negate, i.e. SB=-SB/2;
8th step, upgrades the input value B=B+SB of power input; Then second step is skipped to.
The outstanding advantage of control method of the present invention is: to the control to the input value B of power input in the control of the input value A of input degree of modulation and the 7th step in the 5th step b, adopts rollback mode by half; Power amplifier Auto-Test System needs the radio-frequency (RF) power amplification equipment being applicable to Multiple Type, the radio-frequency (RF) power amplification equipment of different model, relation between input quantity (the input input value A of degree of modulation and the input value B of power input) and output quantity (exporting the output valve CA of degree of modulation and the output valve CB of degree of distortion) is different, therefore can not calculate according to the difference between output quantity and input quantity or ratio and be applicable to various model radio-frequency (RF) power amplification equipment, accurate step value.If use this method dividing multiple stepping grade according to the absolute value of the ratio between output valve and object value and difference in systems in which, there is the situation that output valve is repeatedly shaken about object value most probably.And the step value that algorithm setting of the present invention is very coarse, after the input value adjustment of system, output valve has likely exceeded object value, but by rollback mode of reducing by half, after output valve is excessive, suitable rollback step value reasonably can be selected to carry out rollback, after close to object value, adopt minimum step value; Adopt rollback mode by half, calculate simple, the empirical parameter of needs is few, and adjustment number of times is few, and Adjustment effect is good, and output valve can be avoided to shake the situation of the value that but cannot achieve the goal always.
Another advantage of control method of the present invention is, in the 5th step b3, if DB < DB setting value, then SA=k × SA, k < 1, is namely exporting the output valve CA of degree of modulation close to the object value TA exporting degree of modulation, and after the object value TB of the output valve CB of degree of distortion close to degree of distortion, the step value SA of input degree of modulation diminishes, and the adjusting range of the input value A of input degree of modulation diminishes; Now the adjusting range of the input value B of power input is constant; And when the output valve CA exporting degree of modulation does not also have the object value TA close to output degree of modulation, and exporting the output valve CA of degree of modulation close to the object value TA exporting degree of modulation, but during the object value TB of the output valve CB of degree of distortion not close to degree of distortion, the input value A of input degree of modulation and the input value B of power input all adjusts by significantly variation pattern.Therefore the control rate of control method of the present invention is fast, and approximation accuracy is high.
Further scheme is: in the described first step, the described initial setting input input value A of degree of modulation and the input value B of power input refers to, the input value A=of order input degree of modulation exports object value TA × 0.9 of degree of modulation, and the input value B of power input is power input initial set value.
Further scheme is: in described 4th step, and the described preliminary adjustment input input value A of degree of modulation and the input value B of power input refers to, the input value A of input degree of modulation is constant, and the input value B of power input increases 1dB.
The preliminary adjustment input input value A of degree of modulation and the input value B of power input exports the output valve CA of degree of modulation for regulating object; Because power amplifier Auto-Test System needs to control to export the output valve CA of degree of modulation and the output valve CB of degree of distortion by the adjustment input input value A of degree of modulation and the input value B of power input, namely by two input controls, two output quantities, control more complicated; After deliberation, in the rational situation of the input value B of power input, the input value A of input degree of modulation and the output valve CA of output degree of modulation is relatively; And between the input value B of power input and the output valve CB of degree of distortion, there is no clear and definite mathematical relation; Therefore control method of the present invention is preferentially to export the output valve CA of degree of modulation for regulating object, the preliminary adjustment input input value A of degree of modulation and the input value B of power input; When exporting the ratio R A < 0.7 of degree of modulation, put aside the output valve CB of degree of distortion; The control rate of output quantity can be accelerated.
Preferred scheme is: in described 5th step b3, and the span of scale factor k is 0.7 ~ 0.9.
In described 5th step b2, DA to close in value, the 5th step b3 that in DB setting value and the 7th step, DB closes on value is all preset values, before control method performs, complete setting.
The present invention possesses following outstanding advantages and effect relative to prior art:
1, in control method of the present invention, rollback mode is by half adopted to the adjustment of the input input value A of degree of modulation and the input value B of power input, calculate simple, the empirical parameter needed is few, output valve can be made to be adjusted to object value fast, adjustment number of times is few, Adjustment effect is good, and output valve can be avoided to shake the situation of the value that but cannot achieve the goal always;
2, control method of the present invention, can the output valve CA of output degree of modulation of rapid adjustment power amplifier Auto-Test System and the output valve CB of degree of distortion, and approximation accuracy is high;
3, control method of the present invention is applied in power amplifier Auto-Test System, and be applicable to the radio-frequency (RF) power amplification equipment of Multiple Type, versatility is good.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of the control method that the present invention is based on power amplifier Auto-Test System.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment
Power amplifier Auto-Test System is made up of PC, control panel, radio-frequency signal source, frequency spectrograph, comprehensive test instrument and tested radio-frequency (RF) power amplification equipment.One of them test of this system is the input value of the power input by changing radio-frequency (RF) power amplification equipment and the input value of input degree of modulation, and the output valve of output degree of modulation of radio-frequency (RF) power amplification equipment and the output valve of degree of distortion are achieved the goal value.Control method of the present invention is set in power amplifier Auto-Test System, default exports the object value of degree of modulation and the object value of degree of distortion, then by controlling the input value of input degree of modulation and the input value of power input of radio-frequency (RF) power amplification equipment, the radio-frequency (RF) power amplification equipment output output valve of degree of modulation and the output valve of degree of distortion are approached as quickly as possible and exports the object value of degree of modulation and the object value of degree of distortion, and the radio-frequency (RF) power amplification equipment of Multiple Type can be adapted to.
Find after deliberation, the input value A of input degree of modulation and the input value B of power input has following relation with the output output valve CA of degree of modulation and the output valve CB of degree of distortion:
(1) if increase/reduce the input value B of power input, then exporting the output valve CA of degree of modulation and the output valve CB of degree of distortion will increase simultaneously/reduce;
(2) if increase/reduce the input value A of input degree of modulation, then the output valve CA exporting degree of modulation will increase/reduce, and the change of the output valve CB of degree of distortion be can not determine;
(3) in the rational situation of the input value B of power input, the input value A of input degree of modulation and the output valve CA of output degree of modulation is relatively; And there is no clear and definite mathematical relation between the input value B of power input and the output valve CB of degree of distortion.
According to above-mentioned relation, the present invention is based on the control method of power amplifier Auto-Test System, its flow process as shown in Figure 1, comprises the following steps:
1, based on a control method for power amplifier Auto-Test System, it is characterized in that, comprise the following steps:
The first step, the initial setting input input value A of degree of modulation and the input value B of power input; Concrete scheme is, the input value A=of order input degree of modulation exports object value TA × 0.9 of degree of modulation, and the input value B of power input is power input initial set value; The setting means of power input initial set value has multiple, and such as write direct when coding preset value, or input preset value by man-machine interface before execution;
Second step, the input input input value A of degree of modulation and the input value B of power input, detects and exports the output valve CA of degree of modulation and the output valve CB of degree of distortion;
3rd step, calculate the relation of the output valve CA exporting degree of modulation and the object value TB exporting the object value TA of degree of modulation and the output valve CB of degree of distortion and degree of distortion: if the output valve CA=exporting degree of modulation exports the object value TA of degree of modulation, and the object value TB of the output valve CB=degree of distortion of degree of distortion, then terminate; Otherwise carry out the 4th step;
4th step, calculates the object value TA that the ratio R A=exporting degree of modulation exports the output valve CA/ output degree of modulation of degree of modulation: if during RA >=0.7, skip to the 5th step; If during RA < 0.7, the preliminary adjustment input input value A of degree of modulation and the input value B of power input, then skips to second step; The preliminary adjustment input input value A of degree of modulation and the input value B of power input refers to that the input value A of input degree of modulation is constant, and the input value B of power input increases 1dB;
In 4th step, the preliminary adjustment input input value A of degree of modulation and the input value B of power input exports the output valve CA of degree of modulation for regulating object; Because power amplifier Auto-Test System needs to control to export the output valve CA of degree of modulation and the output valve CB of degree of distortion by the adjustment input input value A of degree of modulation and the input value B of power input, namely by two input controls, two output quantities, control more complicated; After deliberation, in the rational situation of the input value B of power input, the input value A of input degree of modulation and the output valve CA of output degree of modulation is relatively; And between the input value B of power input and the output valve CB of degree of distortion, there is no clear and definite mathematical relation; Therefore control method of the present invention is preferentially to export the output valve CA of degree of modulation for regulating object, the preliminary adjustment input input value A of degree of modulation and the input value B of power input; When exporting the ratio R A < 0.7 of degree of modulation, put aside the output valve CB of degree of distortion; The control rate of output quantity can be accelerated;
5th step, judges the size of RA: if during RA < 0.9 or RA > 1.1, performs the 5th step a; If RA >=0.9 and RA≤1.1 time, perform the 5th step b;
5th step a, calculate the input value A of new input degree of modulation, the input value A of input degree of modulation is the ratio R A of object value TA divided by output degree of modulation of input degree of modulation, and the input value A=namely inputting degree of modulation inputs the ratio R A of the object value TA/ output degree of modulation of degree of modulation; Then the 6th step is skipped to;
5th step b, comprises following little step:
5th step b1, calculates the object value TA that the difference DA=exporting degree of modulation exports the output valve CA-output degree of modulation of degree of modulation; If DA=0, then skip to the 6th step; Otherwise carry out the 5th step b2;
5th step b2, according to the different situations of DA, draws the step value SA of input degree of modulation by following four kinds of modes:
(1) if the absolute value of DA | DA|≤DA closes on value, then: if SA=0.1 during DA < 0; If SA=-0.1 during DA > 0;
(2) if the absolute value of DA | DA| > DA closes on value, and DA < 0, then by the interval [0.9 of RA, 1.0) several RA grades are divided into, at the interval [0.1 of SA, 2] extract several SA level value in, the quantity of SA level value is identical with the quantity of RA grade, the corresponding SA level value of each RA grade; The assignment method of SA is, determines RA grade according to the size of RA, determines corresponding SA level value;
(3) if the absolute value of DA | DA| > DA closes on value, DA > 0, and this is first time assignment SA, by the interval (1.0 of RA, 1.1] several RA grades are divided into, at the interval [0.1 of SA, 2] extract several SA level value in, the quantity of SA level value is identical with the quantity of RA grade, the corresponding SA level value of each RA grade; The assignment method of SA is, determines RA grade according to the size of RA, determines corresponding SA level value;
(4) if the absolute value of DA | DA| > DA closes on value, DA > 0, and this is not first time assignment SA, then SA is 1/2 of existing SA, and symbol negate, i.e. SA=-SA/2;
5th step b3, the object value TB of the output valve CB-degree of distortion of the difference DB=degree of distortion of calculated distortion degree; If DB < DB setting value, then SA=k × SA, k are scale factor, k < 1; Then the 5th step b4 is carried out; If DB >=DB setting value, then directly carry out the 5th step b4; Preferably: the span of scale factor k is 0.7 ~ 0.9;
5th step b4, upgrades the input value A=A+SA of input degree of modulation;
6th step, the object value TB of the output valve CB-degree of distortion of the difference DB=degree of distortion of calculated distortion degree; If DB=0, then skip to second step; Otherwise carry out the 7th step;
7th step, according to the different situations of DB, draws the step value SB of power input by following four kinds of modes:
(1) if the absolute value of DB | DB|≤DB closes on value, if then DB < 0 time SB=0.1dB, if SB=-0.1dB during DB > 0;
(2) if the absolute value of DB | DB| > DB closes on value, and DB < 0, then SB value between 0.1dB ~ 1dB;
(3) if the absolute value of DB | DB| > DB closes on value, DB > 0, and this is first time assignment SB, then SB value between (-0.1dB) ~ (-1dB);
(4) if the absolute value of DB | DB| > DB closes on value, B > 0, and this is not first time assignment SB, then SB is 1/2 of existing SB, and symbol negate, i.e. SB=-SB/2;
8th step, upgrades the input value B=B+SB of power input; Then second step is skipped to.
Wherein, DA closes on value, DB closes on value and DB setting value is all preset values, before control method performs, complete setting.DA closes on value, DB closes on value and DB setting value can be arbitrary value, also rule of thumb can set according to those skilled in the art.
The outstanding advantage of control method of the present invention is: to the control to the input value B of power input in the control of the input value A of input degree of modulation and the 7th step in the 5th step b, adopts rollback mode by half; Power amplifier Auto-Test System needs the radio-frequency (RF) power amplification equipment being applicable to Multiple Type, the radio-frequency (RF) power amplification equipment of different model, relation between input quantity (the input input value A of degree of modulation and the input value B of power input) and output quantity (exporting the output valve CA of degree of modulation and the output valve CB of degree of distortion) is different, therefore can not calculate according to the difference between output quantity and input quantity or ratio and be applicable to various model radio-frequency (RF) power amplification equipment, accurate step value.If use this method dividing multiple stepping grade according to the absolute value of the ratio between output valve and object value and difference in systems in which, there is the situation that output valve is repeatedly shaken about object value most probably.And the step value that algorithm setting of the present invention is very coarse, after the input value adjustment of system, output valve has likely exceeded object value, but by rollback mode of reducing by half, after output valve is excessive, suitable rollback step value reasonably can be selected to carry out rollback, after close to object value, adopt minimum step value; Adopt rollback mode by half, calculate simple, the empirical parameter of needs is few, and adjustment number of times is few, and Adjustment effect is good, and output valve can be avoided to shake the situation of the value that but cannot achieve the goal always.
Another advantage of control method of the present invention is, in the 5th step b3, if DB < DB setting value, then SA=k × SA, k < 1, is namely exporting the output valve CA of degree of modulation close to the object value TA exporting degree of modulation, and after the object value TB of the output valve CB of degree of distortion close to degree of distortion, the step value SA of input degree of modulation diminishes, and the adjusting range of the input value A of input degree of modulation diminishes; Now the adjusting range of the input value B of power input is constant; And when the output valve CA exporting degree of modulation does not also have the object value TA close to output degree of modulation, and exporting the output valve CA of degree of modulation close to the object value TA exporting degree of modulation, but during the object value TB of the output valve CB of degree of distortion not close to degree of distortion, the input value A of input degree of modulation and the input value B of power input all adjusts by significantly variation pattern.Therefore the control rate of control method of the present invention is fast, and approximation accuracy is high.
Through overtesting, under normal conditions, system passes through the adjustment within 10 times, and export the output valve A of degree of modulation and the output valve B of degree of distortion and can arrive the output object value TA of degree of modulation and the object value TB of degree of distortion respectively, adjustment number of times is few, and Adjustment effect is good.
Above-described embodiment is the present invention's preferably embodiment; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (4)
1. based on a control method for power amplifier Auto-Test System, it is characterized in that, comprise the following steps:
The first step, the initial setting input input value A of degree of modulation and the input value B of power input;
Second step, the input input input value A of degree of modulation and the input value B of power input, detects and exports the output valve CA of degree of modulation and the output valve CB of degree of distortion;
3rd step, calculate the relation of the output valve CA exporting degree of modulation and the object value TB exporting the object value TA of degree of modulation and the output valve CB of degree of distortion and degree of distortion: if the output valve CA=exporting degree of modulation exports the object value TA of degree of modulation, and the object value TB of the output valve CB=degree of distortion of degree of distortion, then terminate; Otherwise carry out the 4th step;
4th step, calculates the object value TA that the ratio R A=exporting degree of modulation exports the output valve CA/ output degree of modulation of degree of modulation: if during RA >=0.7, skip to the 5th step; If during RA < 0.7, the preliminary adjustment input input value A of degree of modulation and the input value B of power input, then skips to second step; The described preliminary adjustment input input value A of degree of modulation and the input value B of power input refers to, the input value A of input degree of modulation is constant, and the input value B of power input increases 1dB;
5th step, judges the size of RA: if during RA < 0.9 or RA > 1.1, performs the 5th step a; If RA >=0.9 and RA≤1.1 time, perform the 5th step b;
5th step a, calculate the input value A of new input degree of modulation, the input value A of input degree of modulation is the ratio R A of object value TA divided by output degree of modulation of input degree of modulation, and the input value A=namely inputting degree of modulation inputs the ratio R A of the object value TA/ output degree of modulation of degree of modulation; Then the 6th step is skipped to;
5th step b, comprises following little step:
5th step b1, calculates the object value TA that the difference DA=exporting degree of modulation exports the output valve CA-output degree of modulation of degree of modulation; If DA=0, then skip to the 6th step; Otherwise carry out the 5th step b2;
5th step b2, according to the different situations of DA, draws the step value SA of input degree of modulation by following four kinds of modes:
(1) if the absolute value of DA | DA|≤DA closes on value, then: if SA=0.1 during DA < 0; If SA=-0.1 during DA > 0;
(2) if the absolute value of DA | DA| > DA closes on value, and DA < 0, then by the interval [0.9 of RA, 1.0) several RA grades are divided into, at the interval [0.1 of SA, 2] extract several SA level value in, the quantity of SA level value is identical with the quantity of RA grade, the corresponding SA level value of each RA grade; The assignment method of SA is, determines RA grade according to the size of RA, determines corresponding SA level value;
(3) if the absolute value of DA | DA| > DA closes on value, DA > 0, and this is first time assignment SA, by the interval (1.0 of RA, 1.1] several RA grades are divided into, at the interval [0.1 of SA, 2] extract several SA level value in, the quantity of SA level value is identical with the quantity of RA grade, the corresponding SA level value of each RA grade; The assignment method of SA is, determines RA grade according to the size of RA, determines corresponding SA level value;
(4) if the absolute value of DA | DA| > DA closes on value, DA > 0, and this is not first time assignment SA, then SA is 1/2 of existing SA, and symbol negate, i.e. SA=-SA/2;
5th step b3, the object value TB of the output valve CB-degree of distortion of the difference DB=degree of distortion of calculated distortion degree; If DB < DB setting value, then SA=k × SA, k are scale factor, k < 1, then carry out the 5th step b4; If DB >=DB setting value, then directly carry out the 5th step b4;
5th step b4, upgrades the input value A=A+SA of input degree of modulation;
6th step, the object value TB of the output valve CB-degree of distortion of the difference DB=degree of distortion of calculated distortion degree; If DB=0, then skip to second step; Otherwise carry out the 7th step;
7th step, according to the different situations of DB, draws the step value SB of power input by following four kinds of modes:
(1) if the absolute value of DB | DB|≤DB closes on value, if then DB < 0 time SB=0.1dB, if SB=-0.1dB during DB > 0;
(2) if the absolute value of DB | DB| > DB closes on value, and DB < 0, then SB value between 0.1dB ~ 1dB;
(3) if the absolute value of DB | DB| > DB closes on value, DB > 0, and this is first time assignment SB, then SB value between (-0.1dB) ~ (-1dB);
(4) if the absolute value of DB | DB| > DB closes on value, DB > 0, and this is not first time assignment SB, then SB is 1/2 of existing SB, and symbol negate, i.e. SB=-SB/2;
8th step, upgrades the input value B=B+SB of power input; Then second step is skipped to.
2. the control method based on power amplifier Auto-Test System according to claim 1, it is characterized in that, in the described first step, the described initial setting input input value A of degree of modulation and the input value B of power input refers to, the input value A=of order input degree of modulation exports object value TA × 0.9 of degree of modulation, and the input value B of power input is power input initial set value.
3. the control method based on power amplifier Auto-Test System according to claim 1, is characterized in that, in described 5th step b3, the span of scale factor k is 0.7 ~ 0.9.
4. the control method based on power amplifier Auto-Test System according to claim 1, it is characterized in that, in described 5th step b2, DA to close in value, the 5th step b3 that in DB setting value and the 7th step, DB closes on value is all preset values, before control method performs, complete setting.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1128924A (en) * | 1994-09-30 | 1996-08-14 | 日本电气株式会社 | Transmitter |
| CN1701521A (en) * | 2003-02-06 | 2005-11-23 | 松下电器产业株式会社 | Transmission device and adjustment method thereof |
| US7592795B2 (en) * | 2006-06-30 | 2009-09-22 | Cingular Wireless Ii, Llc | Measurement of distortion in an amplifier |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5012581B2 (en) * | 2008-03-06 | 2012-08-29 | 富士通株式会社 | Distortion compensation amplification apparatus and correction method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1128924A (en) * | 1994-09-30 | 1996-08-14 | 日本电气株式会社 | Transmitter |
| CN1701521A (en) * | 2003-02-06 | 2005-11-23 | 松下电器产业株式会社 | Transmission device and adjustment method thereof |
| US7592795B2 (en) * | 2006-06-30 | 2009-09-22 | Cingular Wireless Ii, Llc | Measurement of distortion in an amplifier |
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