CN102208953B - Calibration method of mobile phone transmission power - Google Patents
Calibration method of mobile phone transmission power Download PDFInfo
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- CN102208953B CN102208953B CN201010139268.5A CN201010139268A CN102208953B CN 102208953 B CN102208953 B CN 102208953B CN 201010139268 A CN201010139268 A CN 201010139268A CN 102208953 B CN102208953 B CN 102208953B
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Abstract
A calibration method of mobile phone transmission power comprises the following steps: A. acquiring initial digital-to-analog conversion values in a mobile phone; B. measuring actual measured power values which are corresponding to the initial digital-to-analog conversion values; C. drafting actual measured power value- digital-to-analog conversion value curves according to the initial digital-to-analog conversion values and the actual measured power values; D. determining a plurality of segment points according to a linear rule of a plurality of the actual measured power value-digital-to-analog conversion value curves so that a plurality of linear sectionalized transmission power value- digital-to-analog conversion value fitting curves can be obtained; E. respectively acquiring corresponding target digital-to-analog conversion values according to prescient target power values and the transmission power value- digital-to-analog conversion value fitting curves; F. performing calibrations by using the target digital-to-analog conversion values. In the invention, complex high times equations do not need to be processed, difficulty of programming a power calibration calculation module during a calibration process can be reduced. Therefore, periods of program exploitation can be shortened and costs of research and development and production can be saved.
Description
Technical field
The invention belongs to communication technique field, relate in particular to the calibration steps of mobile phone transmission power.
Background technology
At present, in the production process of mobile phone, due to reasons such as device deviations, need to carry out calibrating to meet the requirement of related protocol standard accordingly to mobile phone, mobile phone calibration generally comprises transmitter power calibration, receiver gain calibration and voltage controlled oscillator (Voltage Controlled Oscillator, VCO) calibration, wherein, consuming time with transmitter power calibration.Therefore, need to manage to reduce the alignment time under the prerequisite that guarantees transmitter power calibrating quality as far as possible, to improve capacity utilization, reach the object that reduces mobile phone production cost.
Conventionally, the transmitter power calibration of mobile phone is to allow mobile phone at different capacity construction quality (Power ControlLevel, PCL) transmitting power and under different frequency, and by the actual emission power value of professional test apparatus measures mobile phone, as shown in Figure 1, can obtain actual power curve 100, thereby utilize calibration algorithm to compensate the actual emission power value between different capacity level and frequency, to reach the requirement of standard.
The mobile phone power calibration steps of prior art is conventionally as follows:
Platform business provides the polynomial equation formula that represents relation between the actual emission power value P of power amplifier (Power Amplifier, PA) and dac value (Digital Analog Convert, DAC), as shown in Equation 1:
P (DAC)=alog
b(C
0+ C
1* DAC+C
2* DAC
2+ ... + C
n* DAC
n) (formula 1)
Wherein, C
nfor DAC
ncoefficient, coefficient a, b and high order power n provide corresponding value by platform business, wherein, the number that the empirical calibration point providing with platform business is provided of n is relevant.
First, by instruction, allow mobile phone enter non-signaling status, choose several experience points, allow respectively mobile phone normal transmission power in these experience points, and Modulating Power tester is measured respectively the actual emission power value P in these experience points.According to write in advance each DAC value of mobile phone and the real output value P measuring by platform business, calculate the rated output curve 101P (DAC) of P and DAC.Again according to the desired target power value P of each power construction quality
expsubstitution rated output curve 101P (DAC), to calculate the expectation DAC value DAC that each power construction quality is corresponding
exp, and will expect DAC value DAC
expor DAC value side-play amount DAC
offsetdeposit mobile phone E in
2in the APC list of PROM, wherein, described DAC
offsetcan pass through formula DAC
offset=DAC
exp-DAC and obtaining.
For example, actual power curve 100P (DAC) equation that certain platform business provides as shown in Equation 2, the PCL choosing in GSM850 frequency range is respectively 5,10,15 and 19, and described a value is 20, b value is 10, and the DAC value that each PCL of recording by power test equipment is corresponding and the measurement result of real output value P are as shown in table 1.
P (DAC)=20log
10(C
0+ C
1* DAC+C
2* DAC
2+ C
3* DAC
3) (formula 2)
Table 1
| PCL | DAC | Real output value P (dBm) |
| 5 | 1040 | 31.3168 |
| 10 | 550 | 22.9907 |
| 10 | 550 | 22.9907 |
| 19 | 265 | 5.33419 |
By four groups of data substitution formulas 2 in table 1, by calculating coefficient C
0=-5.2165, C
1=0.0152, C
2=4.9761 * 10
-5and C
3=-2.4545 * 10
-8thereby, can draw rated output curve 101P (DAC) curvilinear equation formula as shown in Equation 3, afterwards, the requirement according to 3GPP standard to each power construction quality, utilizes the PCL5～PCL19 of 3 pairs of GSM850 frequency ranges of formula to carry out the calibration of power.
P (DAC)=20log
10(5.2165+0.0152DAC+4.9761 * 10
-5dAC
2-2.4545 * 10
-8dAC
3) (formula 3)
Above traditional calibration of power algorithm, the ready-made formula that need to provide according to platform business carries out, and mainly there is following shortcoming in it:
1) while calculating each high-order term coefficient of P (DAC) curvilinear equation, need to separate nonhomogeneous linear equation, calculate target DAC value DAC
exptime need to separate Equation of Higher Degree with One Unknown, these all need to use complicated algorithm, have increased the difficulty of programming;
2) in actual production due to the difference between mobile phone, easily there is deviation with actual power curve 100 in the rated output curve that calculates 101;
3) change different cell phone platforms or the PA of different model, its formula 1 can change, and the technical staff who is responsible for thus the calibration of power needs developed horse power calibration algorithm code again, has increased thus the cost of the calibration of power.
Summary of the invention
The present invention need to process the equation of higher degree for solving power calibrating method in prior art, and the larger technical problem of its programming difficulty provides a kind of algorithm relatively simply and the calibration steps of the mobile phone transmission power that calibration accuracy is higher.
Technical scheme of the present invention is:
A, choose at random the mobile phone to be calibrated of a plurality of same model, and obtain respectively to prestore and be stored in each mobile phone memory, the initial dac value of the minimum corresponding with lowest power construction quality and the maximum initial dac value corresponding with peak power construction quality;
B, adopt device for testing power measure minimum initial dac value with maximum initially dac value interval with the corresponding measured power value of interior initial dac value;
C, according to above-mentioned each initial dac value, with and corresponding measured power value, depict respectively measured power value-dac value curve of every mobile phone to be calibrated;
The linear rule of D, many described measured power value-dac value curves of foundation is determined a plurality of waypoints, and by the linear connection of described a plurality of waypoints, obtains having transmission power level-dac value matched curve of a plurality of linear segmented;
The corresponding target power value of each power construction quality of E, foundation precognition, and the matched curve of described transmission power level-dac value, obtain respectively corresponding target dac value;
F, utilize described target dac value to calibrate the initial dac value of answering in contrast.
The present invention is different from prior art and adopts the equation of higher degree to remove to approach actual power curve, and realize the compensation of transmitting power or calibration after programming, the present invention is by after choosing at random a plurality of mobile phones and drawing one by one its measured power value-dac value curve, by this curve being carried out to the mode of linear segmented, simulate the matched curve of transmission power level-dac value, and by this transmission power level-dac value matched curve, utilize the method for linear interpolation, under the prerequisite of known target performance number, realization is to being pre-stored in calibration or the compensation of the initial dac value in mobile phone memory.Because the method is without processing the complicated equation of higher degree, reduce thus to need difficulty that calibration of power computing module is programmed in calibration process, thereby can shorten the cycle of program development, save research and development and production cost.
Accompanying drawing explanation
Fig. 1 is actual power curve and rated output curve comparison figure in prior art;
Fig. 2 is the structural representation block diagram that the present invention measures mobile phone actual power value;
Fig. 3 is the method flow diagram of the calibration steps of mobile phone transmission power provided by the invention;
Fig. 4 is measured power value-dac value curve chart that the present invention measures according to step B;
Fig. 5 is transmission power level-dac value matched curve figure provided by the invention;
Fig. 6 is that the present invention carries out transmission power level-dac value matched curve of obtaining after the calibration of power and the comparison diagram of measured power value-dac value curve;
Fig. 7 is that the present invention adopts linear interpolation mode the transmission power level under each power construction quality to be carried out to the schematic diagram of the calibration of power.
Embodiment
In order to make technical problem solved by the invention, technical scheme and beneficial effect clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The invention provides a kind of calibration steps of mobile phone transmission power, as shown in Fig. 2, Fig. 3, Fig. 3 and Fig. 4, it comprises the steps:
A, choose at random the mobile phone to be calibrated 10 of a plurality of same model, and obtain respectively to prestore and be stored in each mobile phone memory (not shown), the initial dac value of the minimum corresponding with lowest power construction quality and the maximum initial dac value corresponding with peak power construction quality;
B, adopt device for testing power 12 measure minimum initial dac value with maximum initially dac value interval with the corresponding measured power value of interior initial dac value;
C, according to above-mentioned each initial dac value, with and corresponding measured power value, depict respectively measured power value-dac value curve (not shown) of every mobile phone to be calibrated;
The linear rule of D, many described measured power value-dac value curves of foundation is determined a plurality of waypoints, and by the linear connection of described a plurality of waypoints, obtains having transmission power level-dac value matched curve 201 of a plurality of linear segmented;
The corresponding target power value of each power construction quality of E, foundation precognition, and described transmission power level-dac value matched curve 201, obtain respectively corresponding target dac value;
F, utilize described target dac value to calibrate the initial dac value of answering in contrast.
Now, respectively the listed step of the calibration steps of mobile phone transmission power provided by the invention is explained in detail, as follows:
A step
In described steps A, choose at random the mobile phone to be calibrated 10 of many same model, for example, in execution mode provided by the invention, choose at least 10 mobile phones 10 to be calibrated, and the working frequency range of these mobile phones is GSM850 frequency range, then obtain the initial dac value DAC data of GSM850 frequency range in mobile phone memory, for example described mobile phone memory is E
2pROM.In this execution mode provided by the invention, the lowest power construction quality of selected mobile phone to be calibrated is 5, peak power construction quality is 19, and each power construction quality has unique initial dac value in contrast should, wherein, the initial dac value DAC of the corresponding minimum of lowest power construction quality 5 (being PCL5)
lowbe 265, the initial dac value DAC of the corresponding maximum of peak power construction quality 19 (being PCL19)
higbe 1040, in the present invention, the scope of initial dac value DAC is 265～1040.128～251 interchannels at frequency band GSM 850 are selected a channel 189, for measuring the measured power value P of mobile phone under power emission state in step B.
B step
In the present invention, adopt for example CMU200 comprehensive test instrument, Agilent8960 comprehensive test instrument, Willtek4400 comprehensive test instrument constant power testing apparatus 12 to measure the performance number of mobile phone 10 to be calibrated under transmitting power state.
As shown in Figure 2, described computer 11 is peripheral control unit, it at specified requirements (for example: working frequency range, channel, DAC value is responsible for order mobile phone, etc.) under open transmitting power, and from device for testing power 12, obtain the actual emission power of mobile phone, described computer 11 is connected with the PORT COM of described mobile phone 10 to be calibrated, the radio-frequency (RF) output end of described mobile phone is connected with the rf inputs of device for testing power 12, and described device for testing power 12 feedback links, to described computer 11, are realized and in real time the mobile phone actual emission power value measuring are fed back to computer 11.Connected mode between mobile phone 10 to be calibrated and device for testing power 12 can be for multiple, for example, adopt the connected mode of serial ports or Uart mouth, connected mode between computer 11 and device for testing power 12 also has multiple, its concrete condition need to be depending on concrete device for testing power 12 models, the connected mode that model difference adopts also can be distinguished to some extent, and conventionally, the connected mode of employing has GPIB mouth, com port, USB mouth etc.
In described step B, mobile phone to be calibrated is transmitting power on any channel of working frequency range all, more preferred, mobile phone to be calibrated is transmitting power in the intermediate channels of working frequency range all, in the present invention, the frequency range that the working frequency range of described mobile phone can provide for arbitrary network service provider, is not limited to herein in order to explain GSM850 frequency range of the present invention.When described many mobile phones to be calibrated of choosing are during in transmitting power, need to make it all on identical channel, launch, described channel can be any channel in the middle of the extremely high channel of lowest channel in this working frequency range, but according to the preferred embodiment of the present invention, described channel is preferably the intermediate channels of this working frequency range.In each related herein embodiment, unless otherwise noted, be all to take the intermediate channels of GSM850 frequency range to narrate the present invention as example.
When measuring power, in the intermediate channels of GSM850 frequency range, for example, on 189 channels, to the initial dac value of 10 mobile phones 10 to be calibrated selecting by the initial dac value DAC of minimum
lowsuccessively add 1 operation, or by the initial dac value DAC of maximum
higsuccessively subtract 1 operation, initial dac value DAC is at DAC
low～DAC
higbetween take 1 as step-length, measure respectively successively the measured power value P corresponding with this initial dac value DAC, and record measured result.Table 2 has reacted wherein the control case of a mobile phone measured power value and initial dac value.Should be appreciated that according to execution mode provided by the invention, take 1 as step-length, measure the corresponding measured power value of initial dac value DAC, measured power value-dac value curve that it is drawn comparatively approaches actual curve, is preferred forms.But except present embodiment, as long as can record with the initial dac value of minimum and maximum initially dac value interval and, with measured power value corresponding to interior initial digital-to-analogue photograph, can carry out next step operation of the present invention according to this initial dac value and measured power value.For example,, by the initial dac value DAC of maximum
higsuccessively take and 2 subtract 2 operations as step-length, or by the initial dac value DAC of minimum
lowsuccessively take and 2 add 2 operations as step-length, measure respectively successively the measured power value P corresponding with this initial dac value DAC, and record measured result.
Table 2
| PCL | DAC | Measured power value | PCL | DAC | Measured power value | PCL | DAC | Measured power value |
| 5 | 1040 | 31.3168 | 10 | 550 | 22.9907 | 15 | 325 | 12.3306 |
| 6 | 960 | 30.45061 | 11 | 480 | 20.68874 | 16 | 305 | 10.53159 |
| 7 | 830 | 28.75427 | 12 | 430 | 18.74636 | 17 | 290 | 8.86113 |
| 8 | 720 | 26.90504 | 13 | 390 | 16.70023 | 18 | 275 | 6.9431 |
| 9 | 610 | 24.62 | 14 | 355 | 14.59877 | 19 | 265 | 5.33419 |
C step
From step B, as shown in Figure 4, according to 10 mobile phones 10 to be calibrated are being carried out to measured power value P measured under transmitting power state and initial dac value DAC
low～DAC
higcan in reference axis, depict 10 measured power value-dac value curves, because selected mobile phone has identical initial dac value scope and adopts identical power amplifier, and transmitting power on the same channel of GSM850 frequency range all, for example, 189 channels, each curve of therefore depicting should be roughly the same.When occurring that larger deviation appears in a small amount of curve and other curves, can ignore the curve that this occurs deviation, thereby not affect the present invention carrying out smoothly of other steps thereafter.
D step
For the initial dac value DAC in mobile phone, its concrete numerical value corresponds respectively to a certain specific power construction quality PCL, and its corresponding relation can be reviewed table 2, and for example, the power construction quality PCL of GSM850 is followed successively by PCL5-PCL19.In other words, described transmission power level-dac value matched curve 201 also can be regarded as the relation curve between measured power value P and power construction quality PCL.
In this step D, measured power value-dac value curve of every mobile phone 10 to be calibrated depicting respectively according to step C, by observing the shape of its each curve, can on these 10 the measured power value-dac value curves that obtain respectively, find a plurality of waypoints, for this step D in order to establish transmission power level-dac value matched curve 201, in concrete operating process, the selection of the plurality of waypoint be with it, connect successively after, can press close to comparatively accurately this 10 measured power value-dac value curves.
In the present invention, provide two kinds of different embodiments, so that establish described a plurality of waypoint on described measured power value-dac value curve, and described a plurality of waypoint linear series have been obtained to transmission power level-dac value matched curve 201.
Scheme one
In this programme, 10 measured power value-dac value curves that obtained by step C, summarize the conclusion measured power value-dac value curve 200 that can sum up these 10 measured power value-dac value curves, owing to only having unique measured power value P corresponding with it for each power construction quality PCL, and establish a unique coordinate points at described conclusion measured power value-dac value curve 200, in the present invention, by observing described curve, and according to the coordinate points of described establishment, choose wherein a plurality of as waypoint, in the present invention, described segmentation is counted and is at least 3, meaning, linear rule according to described conclusion measured power value-dac value curve 200 is determined at least 3 waypoints, and described waypoint is that mobile phone is under the different capacity construction quality between lowest power construction quality and peak power construction quality, the initial dac value of its correspondence is being concluded the coordinate points of establishing on measured power value-dac value curve 200.
Described step D comprises the steps:
D1, many described measured power value-dac value curves of foundation obtain one and conclude measured power value-dac value curve 200;
D2, on measured power value-dac value curve 200, choose lowest power construction quality or the corresponding coordinate points of peak power construction quality as initial waypoint concluding;
D3, concluding on measured power value-dac value curve 200, described power construction quality is subtracted/increases to few 2 power construction qualities successively, to determine successively a plurality of target segment points.
D4, by described initial waypoint and a plurality of target segment points successively linear connection, form described transmission power level-dac value matched curve 201.
According to an embodiment provided by the invention, on 189 channels of GSM850 frequency range, first selecting PCL19 is initial PCL, according to concluding measured power value-dac value curve 200, select PCL19, and the measured power value P corresponding with it and the coordinate points of establishing is initial waypoint, secondly, selecting PCL17 is first object PCL, select PCL17, and the measured power value P corresponding with it and the coordinate points of establishing is first object waypoint, afterwards, on coordinate, described initial waypoint and first object waypoint are connected with straight line.The equation of the straight line obtaining described in foundation, calculating is its corresponding calculated power value under power construction quality PCL18, and this calculated power value is compared according to concluding measured power value-dac value curve 200 corresponding actual power value P with PCL18, thereby calculate its power deviation, see whether its requirement that is less than standard or production, for example, its power deviation is ± 2db, if in this deviation range, this first object waypoint meets the requirements; If its power deviation is outside this scope, this first object waypoint of choosing is undesirable, need to be using the coordinate points of PCL18 and corresponding actual power value P establishment as definite first object waypoint, straight line connects initial waypoint and new first object waypoint, first segmentation of transmission power level-dac value matched curve 201 that formation this programme provides.According to the method, analogize, on described conclusion measured power value-dac value curve 200, select suitable power construction quality using and corresponding measured power value as target segment point, and it is connected with straight line with the target segment point of establishing before, finally forms transmission power level-dac value provided by the invention matched curve 201.In the present invention, the number of described target segment point is more, its transmission power level-dac value matched curve 201 is more close to measured power value-dac value curve 200, but this operation has increased the complexity of work undoubtedly, thus, the quantity of the preferred described target segment point of the present invention is 2～4.
Scheme two
This scheme is with the means of ocular estimate, described transmission power level-dac value matched curve 201 to be carried out to linear segmented based on those skilled in the art.First observe conclusion measured power value-dac value curve 200 that Fig. 4 provides, initial definite segments is 3 sections, select an initial fragment point, three target segment points, for example, on abscissa, selected PCL5～PCL9 is the first piecewise interval, PCL9～PCL13 is the second piecewise interval, PCL13～PCL19 is the 3rd piecewise interval, afterwards, observe transmission power level-dac value matched curve 201 of this establishment and the relation of conclusion measured power value-dac value curve 200 that Fig. 6 provides, if certain section of piecewise interval has larger power deviation with conclusion measured power value-dac value curve 200, need selected target segment point to modify, when last the first selected piecewise interval, when the second piecewise interval and the 3rd piecewise interval meet respectively requiring of 3GPP standard with the power deviation of concluding measured power value-dac value curve 200, the curve that can determine its formation is final transmission power level-dac value matched curve 201.
E step
In the present invention, select the mobile phone of GSM850 frequency range as experimental subjects, the situation of the corresponding target power value of power construction quality that it is corresponding is as shown in table 3 below:
Table 3
| PCL | Target power value (dBm) | PCL | Target power value (dBm) | PCL | Target power value (dBm) |
| 5 | 32.2 | 10 | 23 | 15 | 13 |
| 6 | 31 | 11 | 21 | 16 | 11 |
| 7 | 29 | 12 | 19 | 17 | 9 |
| 8 | 27 | 13 | 17 | 18 | 7 |
| 9 | 25 | 14 | 15 | 19 | 5 |
Transmission power level-dac value the matched curve 201 obtaining according to described step D, according to the linear characteristic of its each piecewise interval, obtain its corresponding linear equation, and according to the corresponding target power value of each power construction quality, calculate respectively corresponding target dac value.For example, in one embodiment of the invention, described power construction quality is for Wei not PCL5-PCL9, and its result is as shown in table 4:
Table 4
| PCL | Target power value (dBm) | Measured power value (dBm) | Initial dac value | Target dac value |
| 5 | 32.2 | 31.31680 | 1040 | 1096 |
| 6 | 31 | 30.45061 | 960 | 1019 |
| 7 | 29 | 28.75427 | 830 | 891 |
| 8 | 27 | 26.90504 | 720 | 762 |
| 9 | 25 | 24.62000 | 610 | 634 |
| 10 | 23 | 22.99070 | 550 | 564 |
| 11 | 21 | 20.68874 | 480 | 509 |
| 12 | 19 | 18.74636 | 430 | 453 |
| 13 | 17 | 16.70023 | 390 | 393 |
| 14 | 15 | 14.59877 | 355 | 371 |
| 15 | 13 | 12.33060 | 325 | 349 |
| 16 | 11 | 10.53159 | 305 | 327 |
| 17 | 9 | 8.86113 | 290 | 305 |
| 18 | 7 | 6.94310 | 275 | 283 |
| 19 | 5 | 5.33419 | 265 | 261 |
F step
For this step, according to the present invention, can there be two kinds of different processing modes, be respectively:
Mode one: described step F comprises the steps:
The described target dac value that F1, utilization obtain covers respectively to prestore and is stored in the initial dac value of answering in contrast within the scope of the extremely maximum initial dac value of the initial dac value of minimum in mobile phone memory.
For example, the data that provide according to above-mentioned table 4, after obtaining target dac value by described step e, before the described target dac value obtaining directly can being covered, think with it corresponding initial dac value,, in mobile phone memory, the initial dac value of initial storage is deleted, and the use target dac value changing replaces, and is again stored in this mobile phone memory.For example, according to this embodiment provided by the invention, the situation APC table after covering is as shown in table 5:
Table 5
| PCL | Target dac value | PCL | Target dac value | PCL | Target dac value |
| 5 | 1096 | 10 | 564 | 15 | 349 |
| 6 | 1019 | 11 | 509 | 16 | 327 |
| 7 | 891 | 12 | 453 | 17 | 305 |
| 8 | 762 | 13 | 393 | 18 | 283 |
| 9 | 634 | 14 | 371 | 19 | 261 |
Mode two: described step F comprises the steps:
The described target dac value that F1, utilization obtain deducts respectively to prestore and is stored in the initial dac value of answering in contrast within the scope of the extremely maximum initially dac value of minimum initial dac value in mobile phone memory, obtains respectively a series of target digital-to-analogue conversion offset;
F2, described target digital-to-analogue conversion offset is deposited in mobile phone memory.
From above, the corresponding target power value of power construction quality according to precognition, according to the multistage linear equation of transmission power level-dac value matched curve 201 correspondences, due under specific power construction quality, having prestores is stored in initial dac value corresponding in mobile phone memory, thus, can calculate the corresponding target digital-to-analogue conversion of a series of certain power construction qualities offset.The target dac value being obtained by step e described in adopting deducts successively to prestore and is stored in the initial dac value in mobile phone memory, for example formula DAC
offset=DAC
exp-DAC, obtains respectively a series of target digital-to-analogue conversion offset DAC
offset.Retain the prerequisite of initial dac value under, described target digital-to-analogue conversion offset and described initial dac value one to one deposited in mobile phone memory thereafter.
For example, in an embodiment provided by the invention, as shown in Figure 7, described curve is a segmentation in transmission power level-dac value matched curve 201.The initial dac value DAC of the acquiescence of PCL13, PCL19 is respectively DAC13
def=390, DAC19
def=265, according to described curve, the measured power value that it measures is respectively P13=16.70023dBm, P19=5.33419dBm.Can determine that thus the coordinate that Q is ordered is (390,16.70023), the coordinate that S is ordered is (265,5.33419), in substitution straight line equation P=a * DAC+b, thereby solve coefficient a=0.09092832, b=-18.7618148, the straight line equation that thus, can obtain this curve is P=0.09092832 * DAC-18.7618148.
In this embodiment, choose power construction quality PCL15 and explain step F provided by the invention, how to obtain target digital-to-analogue conversion offset.According to the requirement of 3GPP standard, the target power value that PCL15 is corresponding is P15
exp=13dBm, by P15
exp=13 substitution straight line equation P=0.09092832 * DAC-18.7618148, for example: 13=0.09092832 * DAC-18.7618148, obtains the target power value DAC15 of PCL15
exp=349.Due to, prestore with mobile phone in the initial dac value DAC15 of acquiescence of PCL15
def=325, need the initial dac value DAC15 corresponding to power construction quality PCL15
defthe side-play amount compensating is, i.e. the target digital-to-analogue conversion offset DAC15 of the required calculating of this step
offset=DAC15
exp-DAC15
def=349-325=24.For other power construction quality, can adopt and complete in the same way its calibration calculations, the target dac value DAC15 calculating respectively according to power construction quality PCL5～PCL19
expinitial dac value DAC corresponding thereto
defvalue, obtains DAC5 one to one
offset～DAC19
offset.And the DAC5 that this is obtained
offset～DAC19
offsetwrite mobile phone memory, for example E
2in the APC table of PROM, reach the object of power back-off.
According to above method, the last APC form that it obtains is as shown in table 6.
Table 6
| PCL | Target digital-to-analogue conversion offset | PCL | Target digital-to-analogue conversion offset | PCL | Target digital-to-analogue conversion offset |
| 5 | 56 | 10 | 14 | 15 | 24 |
| 6 | 59 | 11 | 29 | 16 | 22 |
| 7 | 61 | 12 | 23 | 17 | 15 |
| 8 | 42 | 13 | 3 | 18 | 8 |
| 9 | 24 | 14 | 16 | 19 | -4 |
The present invention is different from prior art and adopts the equation of higher degree to remove to approach actual power curve, and after completing, realizes the compensation of transmitting power or calibration high complicated programing work, the present invention is by after choosing at random a plurality of mobile phones and drawing one by one its conclusion measured power value-dac value curve 200, by this curve being carried out to the mode of linear segmented, simulate transmission power level-dac value matched curve 201, and by this transmission power level-dac value matched curve 201, utilize the method for linear interpolation, under the prerequisite of known target performance number, realization is to being pre-stored in calibration or the compensation of the initial dac value in mobile phone memory.Because the method is without processing the complicated equation of higher degree, reduce thus to need difficulty that calibration of power computing module is programmed in calibration process, thereby can shorten the cycle of program development, save research and development and production cost.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. a calibration steps for mobile phone transmission power, is characterized in that, comprises the steps:
A, choose at random the mobile phone to be calibrated of a plurality of same model, and obtain respectively to prestore and be stored in the initial dac value of the minimum corresponding with lowest power construction quality in each mobile phone and the maximum initial dac value corresponding with peak power construction quality;
B, adopt device for testing power to measure the minimum initial dac value measured power value corresponding with each initial dac value in maximum initially dac value interval;
C, according to above-mentioned each initial dac value, with and corresponding measured power value, depict respectively measured power value-dac value curve of every mobile phone to be calibrated;
D1, many described measured power value-dac value curves of foundation obtain one and conclude measured power value-dac value curve;
D2, on measured power value-dac value curve, choose peak power construction quality or the corresponding coordinate points of lowest power construction quality as initial waypoint concluding;
D3, concluding on measured power value-dac value curve, with described step D2 adapts, described power construction quality is being increased successively or reduces to few 2 power construction qualities, to determine successively a plurality of target segment points, wherein, initial waypoint is connected with straight line with first object waypoint, choose a power construction quality between initial waypoint and first object waypoint, calculate its corresponding performance number on straight line, and compare with this power construction quality corresponding actual power value on measured power value-dac value curve, as in error range, described first object waypoint meets the requirements, as outside error range, using the coordinate points of selected power construction quality and the establishment of corresponding actual power value as new first object waypoint, according to the method, determine successively a plurality of target segment points,
D4, by described initial waypoint and a plurality of target segment points successively linear connection, form the matched curve of described transmission power level-dac value;
The corresponding target power value of each power construction quality of E, foundation precognition, and the matched curve of described transmission power level-dac value, obtain respectively the corresponding target dac value of this power construction quality;
F, utilize described target dac value to calibrate the initial dac value of answering in contrast.
2. the calibration steps of a kind of mobile phone transmission power according to claim 1, is characterized in that, in described steps A, chooses at random at least 10 mobile phones to be calibrated.
3. the calibration steps of a kind of mobile phone transmission power according to claim 1, is characterized in that, in described step D3 or D4, segmentation is counted and is at least 3.
4. the calibration steps of a kind of mobile phone transmission power according to claim 1, is characterized in that, described step F comprises the steps:
The described target dac value that F1, utilization obtain covers respectively prestoring of answering in contrast and is stored in the initial dac value in mobile phone memory.
5. the calibration steps of a kind of mobile phone transmission power according to claim 1, is characterized in that, described step F comprises the steps:
The described target dac value that F1, utilization obtain deducts respectively to prestore and is stored in the initial dac value of answering in contrast within the scope of the extremely maximum initially dac value of minimum initial dac value in mobile phone memory, obtains respectively a series of target digital-to-analogue conversion offset;
F2, described target digital-to-analogue conversion offset is deposited in mobile phone memory.
6. the calibration steps of a kind of mobile phone transmission power according to claim 1, is characterized in that, in described step B, mobile phone to be calibrated is transmitting power on any channel of working frequency range all.
7. the calibration steps of a kind of mobile phone transmission power according to claim 6, is characterized in that, in described step B, mobile phone to be calibrated is transmitting power in the intermediate channels of working frequency range all.
8. the calibration steps of a kind of mobile phone transmission power according to claim 7, is characterized in that, in described step B, mobile phone to be calibrated is transmitting power in the intermediate channels of GSM850 frequency range all.
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| CN103175547A (en) * | 2011-12-21 | 2013-06-26 | 北京普源精电科技有限公司 | Parameter fitting method of data acquisition device |
| CN103379534B (en) * | 2012-04-13 | 2017-07-28 | 联芯科技有限公司 | Power detecting method and system when being calibrated for terminal relative power |
| CN103901380B (en) * | 2012-12-25 | 2018-07-13 | 北京普源精电科技有限公司 | Calibration method and its calibrating installation |
| CN105450183A (en) * | 2014-07-31 | 2016-03-30 | 展讯通信（上海）有限公司 | Temperature compensation method and device for linear power amplifier |
| CN105471522B (en) * | 2015-11-13 | 2018-01-23 | 太仓市同维电子有限公司 | A kind of frequency shifted calibration method based on statistics and indicatrix |
| CN105786427B (en) * | 2016-02-15 | 2019-01-01 | 深圳市东仪电子有限公司 | A kind of method and device that will be acquired data progress Curve transform and show |
| CN108184009B (en) * | 2017-11-27 | 2020-08-21 | 捷开通讯(深圳)有限公司 | Power calibration method and device and computer readable storage device |
| CN110531301B (en) * | 2018-05-23 | 2021-11-16 | 北京北方华创微电子装备有限公司 | Calibration method and calibration device for output power of radio frequency power supply |
| CN110967555B (en) * | 2019-11-26 | 2021-09-03 | 中电科思仪科技股份有限公司 | Method for improving trigger precision of peak power measurement |
| CN112290996A (en) * | 2020-11-05 | 2021-01-29 | 四川天邑康和通信股份有限公司 | Optical attenuator compensation method applied to PON component automatic test system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1602095A (en) * | 2003-09-27 | 2005-03-30 | 宏达国际电子股份有限公司 | Method of correcting mobile telephone having automatic energy control function and its correction system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7120402B2 (en) * | 2004-03-01 | 2006-10-10 | Motorola, Inc. | Method and apparatus for a high performance and high dynamic range baseband power control system |
-
2010
- 2010-03-29 CN CN201010139268.5A patent/CN102208953B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1602095A (en) * | 2003-09-27 | 2005-03-30 | 宏达国际电子股份有限公司 | Method of correcting mobile telephone having automatic energy control function and its correction system |
Non-Patent Citations (1)
| Title |
|---|
| 韩涛，王权.《GSM/GPRS通信终端发射功率控制及校准方法》.《华中科技大学学报（自然科学版）》.2007,第35卷(第11期), * |
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