CN101521934A - Method for automatically calculating RAMP parameters of GSM power amplifier and device thereof - Google Patents

Method for automatically calculating RAMP parameters of GSM power amplifier and device thereof Download PDF

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Publication number
CN101521934A
CN101521934A CN200810033976A CN200810033976A CN101521934A CN 101521934 A CN101521934 A CN 101521934A CN 200810033976 A CN200810033976 A CN 200810033976A CN 200810033976 A CN200810033976 A CN 200810033976A CN 101521934 A CN101521934 A CN 101521934A
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edge
power
power amplifier
ramp parameter
point array
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CN101521934B (en
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郭为
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Spreadtrum Communications Shanghai Co Ltd
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Spreadtrum Communications Shanghai Co Ltd
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Abstract

The invention relates to a method for automatically calculating RAMP parameters of a GSM power amplifier, which comprises the following steps of: firstly, determining a wave curve and number of sampling points of an edge in the power amplifier; secondly, according to the wave curve, obtaining sampling points with the above number so as to form normalized power point array; thirdly, according to the actual power level, transforming the normalized power point array into an actual power point array; fourthly, according to a power calibration table, searching a power control word corresponding to each point in the actual power point array so as to form the RAMP parameters of the power amplifier at one edge; and fifthly, according to the RAMP parameters of the power amplifier at one edge, obtaining the RAMP parameters of the power amplifier at another edge. The invention also provides a device for calculating the RAMP parameters of the GSM power amplifier.

Description

Automatically calculate the method and apparatus of the RAMP parameter of GSM power amplifier
Technical field
The present invention relates to the GSM moving communicating field, relate in particular to a kind of method and apparatus of RAMP parameter of automatic calculating GSM power amplifier.
Background technology
GSM is a TDMA (time division multiple access) system, must be stuck within the agreement official hour masterplate according to each burst (burst) in any time slot of agreement GSM.Agreement official hour masterplate as shown in Figure 1.
The rising edge and the trailing edge that is to say each burst all must be finished within 28 μ s.The process of the simplest rising and decline is just as direct rising of square wave and decline, but the so rapid rising and the meeting that descends produce bigger switch spectral interference, and gsm protocol has strict requirement to the switch spectral interference.For satisfying the requirement of switch frequency spectrum, the rising edge of each burst and trailing edge must slowly rise and descend according to certain waveform, i.e. waveform a as shown in Figure 2.
General such rising waveform and falling waveform can be sampled 18 points, and every bit is exactly power amplifier (PA) the power control word of this moment.These 18 RAMP parameters that PA power control word is exactly the GSM power amplifier.
The adjustment of RAMP parameter and setting are bit by bit slowly to adjust on instrument by manual traditionally, and this debugging efficiency is slower, and needs unnecessarily labor intensive, and the manual operation meeting brings uncertain factor.
Summary of the invention
The objective of the invention is to propose a kind of method and apparatus of RAMP parameter of automatic calculating GSM power amplifier, reduce manual participation to the full extent, thereby improve debugging efficiency, reduce artificial uncertain factor.
For this reason, the invention provides a kind of method of RAMP parameter of automatic calculating GSM power amplifier, may further comprise the steps.At first, determine power amplifier wherein an edge wavy curve and sampling number; Then, form normalized power point array according to obtaining the sampled point that quantity is described sampling number in the described wavy curve; Then, according to required actual power grade described normalized power point array is converted to actual power point array; Search the pairing power control word of every bit in the described actual power point array according to a calibration of power table again, with the RAMP parameter of the edge power amplifier formed; Obtain the power amplifier RAMP parameter on another side edge at last according to the power amplifier RAMP parameter at a described wherein edge.
In above-mentioned method, determine power amplifier wherein an edge wavy curve and the step of sampling number comprise: receive appointment to described wavy curve and sampling number.
In above-mentioned method, above-mentioned wavy curve can meet:
y = 1 2 - 1 2 cos ( πx ) , 0≤x≤1。
In above-mentioned method, wherein an edge can be rising edge or trailing edge, and another side is along should be trailing edge or rising edge, wherein the RAMP parameter symmetry of rising edge and trailing edge mutually.
In above-mentioned method, described calibration of power table is to generate by the calibration curve in the general GSM power amplifier calibration process.
The present invention also provides a kind of device of RAMP parameter of automatic calculating GSM power amplifier, comprising: the model determining unit, determine power amplifier wherein an edge wavy curve and sampling number; Sampling unit, the link model determining unit according to obtaining the sampled point that quantity is described sampling number in the described wavy curve, is formed normalized power point array; Converting unit connects sampling unit, according to required actual power grade described normalized power point array is converted to actual power point array; Lookup unit connects converting unit, searches the pairing power control word of every bit in the described actual power point array according to a calibration of power table, with the RAMP parameter of an edge power amplifier of composition; And unit as a result, connect converting unit, obtain the power amplifier RAMP parameter on another side edge according to the power amplifier RAMP parameter at a described wherein edge.
Thus, RAMP parameter automatic calculating method of the present invention and device, only need choose suitable waveform and requirements such as sampling number and actual power grade, get final product the RAMP parameter of automatic rated output amplifier, this process can reduce manual the participation, improve debugging efficiency, and reduce artificial uncertain factor thus.
Description of drawings
Fig. 1 is the time template schematic diagram of gsm system.
Fig. 2 is the GSM burst oscillogram with slow rising and decline process.
Fig. 3 is a RAMP parameter automatic calculating method flow chart according to an embodiment of the invention.
Fig. 4 is a RAMP parameter automatic computing equipment structured flowchart according to an embodiment of the invention.
Embodiment
Fig. 3 is a RAMP parameter automatic calculating method flow chart according to an embodiment of the invention.With reference to shown in Figure 3, the procedure of calculating the RAMP parameter automatically is as follows:
At first, as step 301, determining that one of them wavy curve and the employing of rising edge or trailing edge count, for example is the appointment that receives the user.Be example with rising waveform and the sampling number of choosing rising edge below.According to emulation, preferable wavy curve should be the cosine signal waveform in 1/2 cycle, and its function expression is as follows:
y = 1 2 - 1 2 cos ( πx ) , 0≤x≤1......(1)
In addition, employing is counted and normally is chosen for 18 points.
Secondly, as step 302, according to sampling number (as 18 points), x is equally spaced 18 points of getting between 0 and 1, and calculate pairing y by following formula (1).Y value with the statement of dB form is normalized power point array at this moment, is designated as P DBc[].
Afterwards, as step 203, according to this array P DBcThe pairing power grade of RAMP parameter of [] required calculating is with array P DBc[] is converted to the power points array under the actual power grade, i.e. P DBm[]=P DBc[]+PCL, wherein PCL is the pairing performance number of power grade.Suppose that power grade is 5, then its pairing performance number is exactly 33dBm, and this moment, actual power point array was exactly P DBm[]=P DBc[]+33.
Moreover, as step 204, search P according to the calibration of power table that is generated by the matched curve of power amplifier (PA) calibration of power DBmEach puts pairing PA power control word in [] array, the array RAMP[that this Series P A power control word is formed] be exactly the RAMP parameter of the GSM power amplifier that calculates.
At last, in step 205, according to wherein the RAMP parameter on the RAMP calculation of parameter another side edge at an edge, for example the RAMP parameter of trailing edge and rising edge RAMP parameter symmetry.
What deserves to be mentioned is that in the superincumbent process, the rising waveform of rising edge can also be selected all the other rising waveform for use except that the cosine signal waveform in 1/2 cycle, as long as given waveform expression formula.In addition, above-mentioned sampling number just for example, also can be taken as 16 points, 20 etc.The acquisition of the calibration of power table that matched curve is generated for the PA calibration of power can obtain by the calibration curve in the general GSM power amplifier calibration process.
With a real example embodiments of the invention are described below.A RF3166 power amplifier that rises for the cosine signal waveform that adopted for 1/2 cycle is 5 if need to calculate the power grade of RAMP parameter correspondence, then normalized power point array:
P dBc[]＝[-70，-70，-70，-70，-40，-27，-20，-15，-11，-9，-6，-5，-3，-2，-1，-1，0，0]。
Thereby actual power point array is:
P dBm[]＝P dBc[]+33＝[-37，-37，-37，-37，-7，6，13，18，22，24，27，28，30，31，32，32，33，33]。
In addition, the calibration of power table of this power amplifier is as shown in table 1 below:
Table 1
Power (dBm) The power control word Power (dBm) The power control word
33 1372 19 511
32 1256 18 488
31 1153 17 467
30 1062 16 448
29 980 15 431
28 905 14 416
27 839 13 403
26 780 12 391
25 727 11 381
24 680 10 372
23 638 9 363
22 601 8 356
21 567 7 349
20 538 6 343
5 338
From above-mentioned calibration chart, can search array P DBmThe power amplifier RAMP parameter of each element correspondence in [] is:
RAMP[]＝[0，0，0，0，0，343，403，488，601，680，839，905，1062，1153，1256，1256，1372，1372]。
Fig. 4 is a RAMP parameter automatic computing equipment structured flowchart according to an embodiment of the invention.With reference to shown in Figure 4, from other aspect, automatic computing equipment of the present invention comprises model determining unit 401 that preface successively connects, sampling unit 402, converting unit 403, lookup unit 404 and unit 405 as a result.Model determining unit 402 be used for determining power amplifier wherein an edge wavy curve and sampling number, this can finish the appointment input of wavy curve and sampling number by receiving the user, also can finish by choose preset value from a reservations database.After this, sampling unit 402 can obtain the sampled point that quantity is sampling number according to the wavy curve of determining, forms normalized power point array P DBc[].Converting unit 403 can be put array P with normalized power according to required actual power grade then DBc[] is converted to actual power point array P DBm[].Then, lookup unit 404 obtains by the pairing power control word of the every bit in the actual power point array according to calibration of power table (table 1), with the RAMP parameter at an edge of composition power amplifier.At last, unit 405 can obtain the power amplifier RAMP parameter on another side edge according to the power amplifier RAMP parameter at an edge wherein as a result, and obtains complete RAMP parameter.
Automatic computing equipment of the present invention both can be realized by software programming, also can realize by hardware, firmware or their combination.
Thus, the RAMP parameter automatic calculating method and the device of the above embodiment of the present invention, only need choose suitable rising or requirements such as falling waveform, sampling number and actual power grade, get final product the RAMP parameter of automatic rated output amplifier, this process can reduce manual the participation, improve debugging efficiency, and reduce artificial uncertain factor thus.

Claims (10)

1. method of automatically calculating the RAMP parameter of GSM power amplifier may further comprise the steps:
Determine power amplifier wherein an edge wavy curve and sampling number;
According to obtaining the sampled point that quantity is described sampling number in the described wavy curve, form normalized power point array;
According to required actual power grade described normalized power point array is converted to actual power point array;
Search the pairing power control word of every bit in the described actual power point array according to a calibration of power table, with the RAMP parameter of the edge power amplifier formed;
Obtain the power amplifier RAMP parameter on another side edge according to the power amplifier RAMP parameter at a described wherein edge.
2. the method for claim 1 is characterized in that, described definite power amplifier wherein an edge wavy curve and the step of sampling number comprise: receive appointment to described wavy curve and sampling number.
3. the method for claim 1 is characterized in that, described wavy curve meets:
y = 1 2 - 1 2 cos ( πx ) , 0≤x≤1。
4. the method for claim 1 is characterized in that, a described wherein edge is rising edge or trailing edge, and the another side edge is trailing edge or rising edge, wherein the RAMP parameter symmetry of rising edge and trailing edge.
5. the method for claim 1 is characterized in that, described calibration of power table is to generate by the calibration curve in the general GSM power amplifier calibration process.
6. device that automatically calculates the RAMP parameter of GSM power amplifier comprises:
The model determining unit, determine power amplifier wherein an edge wavy curve and sampling number;
Sampling unit connects described model determining unit, according to obtaining the sampled point that quantity is described sampling number in the described wavy curve, forms normalized power point array;
Converting unit connects described sampling unit, according to required actual power grade described normalized power point array is converted to actual power point array;
Lookup unit connects described converting unit, searches the pairing power control word of every bit in the described actual power point array according to a calibration of power table, with the RAMP parameter of the edge power amplifier formed; And
The unit connects described lookup unit as a result, obtains the power amplifier RAMP parameter on another side edge according to the power amplifier RAMP parameter at a described wherein edge.
7. device as claimed in claim 6 is characterized in that, described model determining unit is determined described wavy curve and sampling number by receiving to the appointment of described wavy curve and sampling number.
8. device as claimed in claim 6 is characterized in that, described wavy curve meets:
y = 1 2 - 1 2 cos ( πx ) , 0≤x≤1。
9. device as claimed in claim 6 is characterized in that, a described wherein edge is rising edge or trailing edge, and the another side edge is trailing edge or rising edge, wherein the RAMP parameter symmetry of rising edge and trailing edge.
10. device as claimed in claim 6 is characterized in that, described calibration of power table is to generate by the calibration curve in the general GSM power amplifier calibration process.
CN2008100339763A 2008-02-28 2008-02-28 Method for automatically calculating RAMP parameters of GSM power amplifier and device thereof Active CN101521934B (en)

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CN102404057A (en) * 2011-07-08 2012-04-04 展讯通信（上海）有限公司 Method for increasing radiation performance of radio-frequency emission part of Global System for Mobile Communications (GSM) terminal
CN105611559A (en) * 2016-02-17 2016-05-25 广东欧珀移动通信有限公司 Debugging method and debugging system of terminal radio frequency
CN113922893A (en) * 2021-09-29 2022-01-11 展讯通信（深圳）有限公司 GSM radio frequency front end power calibration method and device

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Publication number Priority date Publication date Assignee Title
CN102404057A (en) * 2011-07-08 2012-04-04 展讯通信（上海）有限公司 Method for increasing radiation performance of radio-frequency emission part of Global System for Mobile Communications (GSM) terminal
CN102404057B (en) * 2011-07-08 2013-10-02 展讯通信（上海）有限公司 Method for increasing radiation performance of radio-frequency emission part of Global System for Mobile Communications (GSM) terminal
CN105611559A (en) * 2016-02-17 2016-05-25 广东欧珀移动通信有限公司 Debugging method and debugging system of terminal radio frequency
CN105611559B (en) * 2016-02-17 2019-02-12 Oppo广东移动通信有限公司 A kind of adjustment method and debugging system of terminal radio frequency
CN113922893A (en) * 2021-09-29 2022-01-11 展讯通信（深圳）有限公司 GSM radio frequency front end power calibration method and device
WO2023051241A1 (en) * 2021-09-29 2023-04-06 展讯通信（深圳）有限公司 Method and apparatus for calibrating power of gsm radio frequency front end

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Denomination of invention: Method and device for automatically calculating ramp parameters of GSM power amplifier

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