CN101494477B - Terminal power control method and device - Google Patents
Terminal power control method and device Download PDFInfo
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- CN101494477B CN101494477B CN2008100566729A CN200810056672A CN101494477B CN 101494477 B CN101494477 B CN 101494477B CN 2008100566729 A CN2008100566729 A CN 2008100566729A CN 200810056672 A CN200810056672 A CN 200810056672A CN 101494477 B CN101494477 B CN 101494477B
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Abstract
The invention discloses a terminal power control method and a device thereof, which aim at solving the problems that in the prior art, the complexity of compensation is high, the occupied memory space is large and the time of production alignment is long. The method comprises the following steps: when receiving power control word from a base station, a signal processor determines the power level of the next transmission according to the attribute of the power control word and the current power detection value; a power control signal corresponding to the power level is obtained according to the corresponding relation between the stored power level and the power control signal and then the power control signal is transmitted to a transmitter; and the transmitter controls the power level of a transmitting signal according to the power control signal. According to the proposal, the requirements of the output power of the terminal are met, simultaneously, a terminal power control circuit of the prior art is simplified, the occupied memory space is reduced and the time of the production alignment is shortened.
Description
Technical field
The present invention relates to 3G (Third Generation) Moblie (3G, 3rd Generation Mobile Communications) TD-SCDMA systems technology field, relate in particular to a kind of method and device of terminal power control.
Background technology
Power control is one of core technology of Modern Mobile Communications Systems, its objective is to overcome near-far interference, makes system can keep high quality communication, other users that take same channel is not produced unnecessary interference again.
Power control is divided into downlink power control and up-link power control, and downlink power control is that the adjustment base station is to user terminal (UE, User Equipment) emitted power; Up-link power control is exactly the size of controlling the transmitting power of each user terminal, and it can be divided into open Loop Power control and closed power control.
The precondition of up link open Loop Power control is that hypothesis is up identical with the downlink transfer loss; Portable terminal receives and measures the signal strength signal intensity that send the base station; And estimate the downlink transfer loss, then according to this estimation, its transmitting power is adjusted at the terminal voluntarily; Just receive signal and strengthen, just reduce its puberty power; Receive signal weakening, just increase its transmitting power.Uplink closed loop is promptly detected the signal strength signal intensity or the signal to noise ratio of self terminal by the base station, compare with desired value according to recording the result, forms power control instruction (TPC, Transmit Power Control), its transmitting power of notice terminal adjustment.
Generally speaking; The power control system of terminal radio frequency circuit is made up of power amplifier, sender, Base Band Unit and 4 parts of memory; The performance number that Base Band Unit is exported from memory as required reads corresponding APC (Auto Power Control) control word; With the signal of this APC control word control sender emission with the corresponding power of this APC control word, this signal is launched behind power amplifier then, the storage format of APC control word APC table normally in the memory.
Usually APC control word and emitted power possess good linear relationship, but the physical characteristic owing to the employed device in terminal can not present perfect characteristic in the reality, mainly shows two aspects:
1. the gain of device such as sender, power amplifier or circuit has bigger discreteness, that is: different its gains of device are different;
The gain of device or circuit be with environmental condition particularly the variation of temperature and voltage change and its Changing Pattern is not an ideal linearity.
To these two characteristics of device, the prior art scheme has proposed corresponding solution: to discreteness, solve through the measure of every terminal all being produced calibration, calibration result adopts the form of APC calibration chart to deposit usually; And gain is received the problem of environmental influence, except improving the characteristic requirements of using device or circuit, adopt the compensating circuit of environmental factors such as increasing temperature, voltage, humidity to solve.
Figure 1A shows in the prior art scheme fundamental diagram that compensates through to temperature and voltage; This scheme increases temperature sensing circuit and voltage detecting circuit in the terminal; Make testing environment temperature and operating voltage that the terminal can be real-time, improve accuracy rate terminal power control through compensation to temperature and voltage.Its to the key step of terminal power control shown in Figure 1B:
Step 101: when producing calibration; Calibrate out the corresponding APC control word of all power grades to every station terminal; Form an APC calibration chart, the production calibration temperature that high-ranking officers are punctual simultaneously when calibration APC control word is recorded in the APC calibration chart with the production calibration voltage; And record the penalty coefficient C of temperature and voltage through experiment
1, C
2, also being recorded in the APC calibration chart, content recorded is as shown in table 1 in the last APC calibration chart.
Step 102: the terminal when operate as normal, testing environment temperature T regularly
1With voltage V
1
Step 103: the power of output reads corresponding APC control word APC in the APC calibration chart as required
TABLEAnd corresponding production calibration temperature T
0With production calibration voltage V
0
Step 104: ambient temperature during computing terminal work and the difference DELTA T=T between voltage and production calibration temperature and the voltage
1-T
0With Δ V=V
1-V
0
Step 105: by the value of the APC control word behind following formula calculating carrying out temperature, the voltage compensation;
APC＝APC
TABLE+
T×C
1+
V×C
2
Step 106: the signal of launching corresponding power grade with the control of the APC control word after the compensation of calculating gained sender.
The APC calibration chart of table 1. prior art
| Temperature compensation coefficient C 1 | xxx | ||
| Voltage compensation coefficient C 2 | xxx | ||
| Power grade (dBm) | The APC control word | The production calibration temperature | Produce calibration voltage |
| 24 | xxx | xxx | xxx |
| 23 | xxx | xxx | xxx |
| 22 | xxx | xxx | xxx |
| 21 | xxx | xxx | xxx |
| ... | ... | ... | ... |
| ... | ... | ... | ... |
| -50 | xxx | xxx | xxx |
This method is the compensation method of open loop, need do independent consideration to the factor of each influence gain, has increased temperature sensing circuit and voltage detecting circuit; If influencing factor is many more; Compensate more complicatedly, the testing circuit of increase is also just many more, and the shared memory headroom of APC calibration chart is also just big more; In addition, because environmental factors such as the temperature when needing each power grade calibration of test and voltages, the time that causes producing calibration is longer, and if consider that the factor of influence is many more, it is long more to produce the time of calibrating.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of method and device of terminal power control, and the compensation complexity that exists in the prior art is high in order to solve, shared memory headroom reaches the long problem of alignment time of producing greatly.
A kind of terminal comprises power amplifier, sender, and this user terminal comprises:
Memory is used for the corresponding relation of storage power detected value and power output;
Signal processor is used to receive the power adjustment instruction from the base station, detects through the transmitting power to said power amplifier emission; Obtain the power detection value; According to the corresponding relation of said power detection value and power output, obtain the corresponding power output of said power detection value, and according to said power output and said power adjustment instruction; Confirm to want the emitted power grade, and send the corresponding power control signal of said power grade next time to said sender.
The method of a kind of terminal power control is applied to comprise the terminal of power amplifier, sender, memory and signal processor, and during operate as normal, this method comprises at said terminal:
Said signal processor according to the indication of this power adjustment instruction and current power detection value, is confirmed emitted power grade next time when receiving from the power of base station adjustment instruction;
According to the power grade of setting and the corresponding relation of power control signal, obtain the corresponding power control signal of said power grade, and this power control signal is sent to sender;
The watt level that said sender sends signal according to said power control signal adjustment.
A kind of method of measuring terminals transmitting power comprises:
The terminal obtains current power detection value from signal processor, according to the power detection value of preserving and the corresponding relation of power output, confirms that the corresponding power output of said power detection value is current transmission power level.
In the embodiment of the invention through the terminal emitted power is detected; Then according to the value of detection power and the power adjustment commands that receives; The emitting power grade at adjustment terminal; Simplify the terminal power control circuit of prior art, reduced shared memory headroom, shortened the time of producing calibration.
Description of drawings
Figure 1A is the schematic diagram of prior art scheme;
Figure 1B is the flow chart of prior art scheme to terminal power control;
Fig. 2 is the structural representation at a kind of terminal in the embodiment of the invention;
The flow chart of a kind of terminal power control method that Fig. 3 provides for the embodiment of the invention;
Fig. 4 A is the flow chart to calibrating with the corresponding APC control word of all power grades in the embodiment of the invention;
Fig. 4 B is that the embodiment of the invention is carried out the linear fit sketch map to power grade and APC control word;
Fig. 5 is a flow chart of measuring transmitting power in the embodiment of the invention.
Embodiment
Inserting (TD-SCDMA, Time Division-Synchronous Code Division Multiple Access) system terminal with TD SDMA in the present embodiment is that example describes.
Press 3G (Third Generation) Moblie collaborative project group (3GPP, 3
RdGeneration Partnership Project) standard, the TD-SCDMA terminal is following to the specific requirement of up-link power control:
1) UE peak power output
Table 2 has been listed the maximum nominal power output and the tolerance limit of different capacity tier definition.
Table 2.UE peak power output and tolerance limit
| Power grade | Peak power | Tolerance limit | |
| 1 | +30dBm | +1dB/-3dB | |
| 2 | +24dBm | +1dB/-3dB | |
| 3 | +21dBm | +2dB/-2dB | |
| 4 | +10dBm | +4dB/-4dB |
2) open Loop Power control
Open Loop Power control is that the UE transmitter is provided with the ability that its power output is a designated value.Table 3 has been listed the minimum tolerance limit requirement of open Loop Power control.
The minimum tolerance limit of table 3 open Loop Power control
| Normal condition | ±9dB |
| Extreme situation | ±12dB |
3) closed power control
Receive power control command (TPC_cmd at UE; Transmit Power Control Command) in the next time slot after; Transmitter have is according to numerical value its power output 1,2 of change of TPC or RP-TPC or the ability of 3dB, and its minimum requirements is following:
The power output step-length scope of table 4 transmitter when applying closed loop power is controlled
| Transmission power control commands | The transmission power control scope | |
| The 1dB step-length | The 2dB step-length | The 3dB step-length |
| (TPC_cmd) | Minimum value | Maximum | Minimum value | Maximum | Minimum value | Maximum |
| Rise (Up) | +0.5dB | +1.5db | -1dB | +3dB | +1.5dB | +4.5dB |
| (Down) falls | -0.5dB | -1.5dB | -1dB | -3dB | -1.5dB | -4.5dB |
The average output power step-length scope of table 5 transmitter when applying closed loop power is controlled
| Transmission power control commands (TPC_cmdgroup) | Transmitter power control range behind 10 identical transmission power control commands | |||||
| The 1dB step-length | The 2dB step-length | The 3dB step-length | ||||
| Minimum value | Maximum | Minimum value | Maximum | Minimum value | Maximum | |
| Rise (Up) | +8dB | +12dB | +16dB | +24dB | +24dB | +36dB |
| (Down) falls | -8dB | -12dB | -16dB | -24dB | -24dB | -36dB |
Power control command group (TPC_cmd group) is the combination of one group of power control command, and it can obtain according to a series of lasting power control command in the identical time.
4) transmitting power accuracy of measurement
Table 6 transmitting power accuracy of measurement
| ?Parameter | Unit | PUEMAX | |
| 24dBm | 21dBm | ||
| ?UE?transmitted?power＝PUEMAX | dB | +1/-3 | ±2 |
| ?UE?transmitted?power＝PUEMAX-1 | dB | +1.5/-3.5 | ±2.5 |
| ?UE?transmitted?power＝PUEMAX-2 | dB | +2/-4 | ±3 |
| ?UE?transmitted?power＝PUEMAX-3 | dB | +2.5/-4.5 | ±3.5 |
| ?PUEMAX-10≤UE?transmitted?power＜PUEMAX-3 | dB | +3/-5 | ±4 |
Can find out by above requirement; In the TD-SCDMA terminal, lower to the requirement of up link open Loop Power control, the characteristic of device itself just can satisfy; And closed power control requires than higher, maximum transmission power and transmitting power accuracy of measurement is then allowed to exist the tolerance of certain limit.If these requirements can not be satisfied in the terminal, then possibly further may influence testing protocol consistency through the RF consistency test.For making the terminal satisfy these requirements, the embodiment of the invention proposes a kind of method and apparatus of terminal power control.
Engage Figure of description below, practical implementation process of the present invention is described.
Fig. 2 shows a kind of terminal structure sketch map of the embodiment of the invention, comprises power amplifier, sender, memory and signal processor.Wherein,
Memory except the corresponding relation that is used for storage power grade and power control signal, also is used for the corresponding relation of storage power detected value and power output.
These data that memory is preserved are that the production calibration at the terminal obtains.
In the practical implementation process; Power control signal is APC (Auto Power Control) control word; When producing calibration; The power amplifier at terminal sends the power of different brackets respectively, and corresponding APC control word when obtaining each power controlling grade of emission is stored in each power grade and corresponding APC control word in the memory.
In order to make the relation between power grade and the APC control word satisfy linear relationship, can carry out linear fit to storage power grade and APC control word, the data after the match are kept in the memory.
The corresponding relation of power detection value and power output also obtains when producing calibration; The power detection value of preserving in the memory and the corresponding relation of power output can be each power output with its corresponding power detection value between relation; It also can be the characteristic of confirming the relation between power detection value and the power output; Because usually, should satisfy linear relationship between power detection value and the power output.For preceding a kind of situation, can when producing calibration, let the terminal send the power of different brackets respectively, measure and preserve corresponding power detection value.For latter event; Can select a benchmark power output and a reference output power; Let the terminal send this two power respectively, measure two kinds of power detection values under the situation, thereby can draw the coefficient of confirming the relation between power detection value and the power output.
Signal processor is used to receive the power adjustment instruction from the base station, detects through the transmitting power to said power amplifier emission; Obtain the power detection value; According to the corresponding relation of said power detection value and power output, obtain the corresponding power output of said power detection value, and according to said power output and said power adjustment instruction; Confirm to want the emitted power grade, and send the corresponding power control signal of said power grade next time to said sender.
Further, said signal processor comprises: feedback circuit and Base Band Unit.Wherein,
Feedback circuit is connected with said power amplifier, is used for the transmitting power of said power amplifier emission is detected, and the power detection value that detection obtains is fed back to Base Band Unit;
Base Band Unit is connected with said feedback circuit, is used to receive the power detection value that said feedback circuit sends; According to the power detection value of storage and the corresponding relation of power output; Obtain the corresponding power output of said power detection value, and according to said power output, and the power adjustment instruction from the base station that receives; Confirm emitted power grade next time, and send the corresponding power control signal of said power grade to said sender.
And said feedback circuit further comprises: sample circuit and power-sensing circuit.Wherein,
Sample circuit is connected with said power amplifier, is used for that said power amplifier is connected the transmitting power of launching and takes a sample, and send the power of sampling to power-sensing circuit;
Power-sensing circuit is connected with sample circuit, is used to measure the power of said sample circuit sampling, and sends the power detection value that measures to Base Band Unit.
Can know that from table 6 scope of the transmitting power that need detect is about 10dB, and the performance number scope of power-sensing circuit can design about 20dB, the scope of power detection value and emitting power grade to be detected can mate.
In the practical implementation process, sample circuit and power-sensing circuit can have multiple implementation, such as, can use a directional coupler as sample circuit, use a diode as power-sensing circuit.
The idiographic flow of the method that a kind of terminal power that the present invention implements to provide is controlled is as shown in Figure 3, mainly may further comprise the steps:
Step 301: signal processor according to the indication of this power adjustment instruction and current power detection value, is confirmed emitted power grade next time when receiving from the power of base station adjustment instruction.
Concrete, step 301 can comprise:
Step 301a: from feedback circuit, obtain current power detection value,, obtain the corresponding power output of said power detection value according to the power detection value of preserving and the corresponding relation of power output;
The corresponding relation of power detection value and power output is when producing calibration, to obtain, and the corresponding relation of power detection value and power output can have two kinds of file layouts, and a kind of is to store each fixedly corresponding power detection value of power output; Usually, be linear between power detection value and the power output, so also can store the coefficient of confirming the relation between power output and the power detection value.
To first kind of file layout, when producing calibration, the method for obtaining the corresponding relation of power detection value and power output comprises:
The power amplifier at said terminal sends different power outputs respectively, from testing circuit, measures the corresponding power detection value of this power output, and power output that obtains and corresponding power detection value thereof are kept in the memory.Adopt this storage mode, in order to obtain being worth as far as possible accurately, the power output that need detect gets many as much as possible, and the memory space that takies so also will increase, and, increased the time of calibrating.
To second kind of file layout, when producing calibration, the method for obtaining the corresponding relation of power detection value and power output comprises:
A given benchmark power output D
0With reference output power P
1, the power amplifier at said terminal sends this benchmark power output D respectively
0With reference output power D, from testing circuit, measure power detection value V corresponding when sending the benchmark power output
0The power detection value V of correspondence during with transmission reference output power D
1, because be linear between power output and the power detection value, therefore, have following equality to set up:
P
1＝D
0+C(V
1-V
0)
According to this equality, can calculate the value of C, then, can obtain its corresponding power output P for any power detection value V
Out:
P
out＝D
0+C(V-V
0)
In memory, preserve parameter D
0, V
0, and C.Adopt this file layout, for any power detection value, all can calculate its corresponding power output, accuracy rate is high, and the memory space that takies also seldom, has also reduced the time of calibration simultaneously.
Step 301b: according to the indication of received power adjustment instruction, and the relation between said power output and the preset maximum rated power output, after last emitted power grade done to adjust accordingly, as emitted power grade next time.
If said power adjustment instruction is when falling DOWN, then step 301b comprises:
Behind step-length STEP of last emitted power grade downward modulation, as emitted power grade next time.Wherein, step-length STEP gives the terminal by network side through transmitting signaling downwards, can be 3dB, 2dB or 1dB.
If said power adjustment commands is that then step 301b comprises when rising UP:
Judge said power output P
OutWhether more than or equal to the maximum rated power output P at this terminal
MaxOffset delta downward with it
MinPoor, promptly judge (P
Out>=P
Max-δ
Min), if, with last emitted power grade as emitted power grade next time, otherwise, get into steps A;
Steps A, judgement (P
Out+ STEP) whether greater than (P
Max+ δ
Max), δ wherein
MaxBe the maximum rated power output side-play amount that makes progress, if then continue step B, otherwise get into step C;
Step B, judge whether STEP equals 1dB, if, then last emitted power grade is handed over the emitted power grade as next, otherwise said current step-length is deducted 1dB as current effective power step-length, promptly STEP=STEP-1 returns steps A;
Step C, last emitted power grade raised a current step-length STEP after, as emitted power grade next time.
Step 302: according to the power grade of storage and the corresponding relation of power control signal, obtain the corresponding power control signal of said power grade, and this power control signal is sent to sender.
Wherein, the corresponding relation of power grade and power control signal confirms that when producing calibration in the practical implementation process, power control signal is the APC control word.
When producing calibration, the method for corresponding relation of obtaining power grade and APC control word comprises shown in Fig. 4 A:
S401A: launch the power of all grades respectively at power amplifier, measure and preserve the corresponding APC control word of each power grade;
S402A: judge the proportionate relationship between each group power grade and APC control word, the APC control word that departs from linear concerns carried out linear fit, shown in Fig. 4 B, and with the data record after the match in the APC calibration chart.
This calibrating mode has solved the nonlinear characteristic between power grade and the APC control word; For bigger input power; Also can obtain corresponding APC control word, and can eliminate of the influence of extraneous factors such as temperature, voltage the corresponding relation of power grade and APC control word according to linear fit.
Certainly, if less demanding, can be not the corresponding relation of power grade and APC control word not be carried out linear fit yet.
Description above engaging can be known, when producing calibration, the data that deposit in the memory are as shown in table 7.
The APC calibration chart of table 7 embodiment of the invention
| Benchmark power output D 0 | xxxx |
| Benchmaring power V 0 | xxxx |
| Detection power coefficient C | xxxx |
| Power grade (dBm) | The APC control word |
| 26 | xxxx |
| 25 | xxxx |
| 24 | xxxx |
| 23 | xxxx |
| 22 | xxxx |
| 21 | xxxx |
| ... | ... |
| xxxx | xxxx |
| ... | ... |
| -50 | xxxx |
Behind definite emitting power grade next time, Base Band Unit reads corresponding APC control word from memory, the APC control word is sent to sender.
Step 303: sender sends the signal of corresponding power size according to said APC control word.
The method flow of measuring terminals transmitting power is as shown in Figure 5 in the embodiment of the invention, and this method is applied to comprise the terminal of power amplifier, sender, memory and signal processor.Mainly comprise the steps:
Step 501: during operate as normal, obtain the current power detection value that said signal processor measures at the terminal.
Step 502:, confirm the power output that said power detection value is corresponding, i.e. the transmitting power at current terminal according to the power detection value of preserving in the memory and the corresponding relation of power output.
If what preserve in the memory is the coefficient of confirming the relation between power detection value and the power output, then can calculate current transmission power level according to current power detection value.
If what preserve in the memory is the corresponding power detection value of concrete power output, then can therefrom obtains with current power detection and be worth the corresponding power output of immediate power detection value, the i.e. transmission power level at said terminal.
Though above-mentioned is that example describes with the TD-SCDMA terminal, is not limited to this, according to foregoing description, the processing mode of obviously knowing its processing mode and TD-SCDMA system terminal in like manner for other similar systems those skilled in the art.
The embodiment of the invention is a kind of terminal power control method based on closed loop; Employing to the insensitive sample circuit of environmental factor and power-sensing circuit to the detection of taking a sample of terminal emitted power; According to the transmitting power of the performance number control terminal that detects, reduced the complexity of circuit again; When producing calibration, when power grade greatly when making power grade and APC control word not satisfy linear relationship, the method for employing linear fit is carried out match, has solved the nonlinear characteristic of power amplifier; Because the embodiment of the invention has been carried out accurate control to the maximum transmission power at terminal; Improved the accuracy of maximum transmission power; Make the index affluence of maximum transmission power measure, thereby can reduce the required precision of producing calibration and test, thereby enhance productivity; The power control algorithm that provides of the embodiment of the invention is simple in addition, understands operation easily in reality easily.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (9)
1. a terminal comprises power amplifier, sender, it is characterized in that, this user terminal comprises:
Memory is used for the corresponding relation of storage power detected value and power output;
Signal processor is used to receive the power adjustment instruction from the base station, detects through the transmitting power to said power amplifier emission; Obtain the power detection value; According to the corresponding relation of said power detection value and power output, obtain the corresponding power output of said power detection value, and according to said power output and said power adjustment instruction; Confirm to want the emitted power grade, and send the corresponding power control signal of said power grade next time to said sender;
Said signal processor comprises: feedback circuit and Base Band Unit, wherein,
Feedback circuit is used for the transmitting power of said power amplifier emission is detected, and the power detection value that detection obtains is fed back to Base Band Unit;
Base Band Unit; Be used to receive the power detection value that said feedback circuit sends,, obtain the corresponding power output of said power detection value according to the power detection value of storage and the corresponding relation of power output; And according to said power output; And the power adjustment instruction from the base station that receives, confirm emitted power grade next time, and send the corresponding power control signal of said power grade to said sender.
2. terminal as claimed in claim 1 is characterized in that, said feedback circuit comprises:
Sample circuit is connected with said power amplifier, is used for that said power amplifier is connected the transmitting power of launching and takes a sample, and send the power of sampling to power-sensing circuit;
Power-sensing circuit is connected with sample circuit, is used to detect the power of said sample circuit sampling, and sends the power detection value that detects to Base Band Unit.
3. terminal as claimed in claim 1 is characterized in that, said Base Band Unit comprises:
Acquiring unit is used for obtaining and the corresponding power output of power detection value that is received according to the power detection value of storage and the corresponding relation of power output;
Confirm the unit, be used for according to said power output, and the power adjustment instruction from the base station that receives, confirm to want the emitted power grade next time;
Transmitting element is used for confirming the power control signal that said power grade is corresponding according to the power grade of storage and the relation between the power control signal, and said power control signal is sent to said sender.
4. terminal as claimed in claim 1; It is characterized in that the corresponding relation of said power detection value and power output comprises: the characteristic of confirming the relation between power detection value and the power output; Wherein, the relation property between said power detection value and the power output is a linear relationship.
5. the method for terminal power control is applied to comprise the terminal of power amplifier, sender, memory and signal processor, it is characterized in that, during operate as normal, this method comprises at said terminal:
Said signal processor according to the indication of this power adjustment instruction and current power detection value, is confirmed emitted power grade next time when receiving from the power of base station adjustment instruction, wherein saidly confirm that the emitted power grade comprises next time:
From feedback circuit, obtain current power detection value,, obtain the corresponding power output of said power detection value according to the power detection value of preserving and the corresponding relation of power output;
According to the indication of said power adjustment instruction, and the relation between said power output and the preset maximum rated power output, after last emitted power grade done to adjust accordingly, as emitted power grade next time;
According to the power grade of setting and the corresponding relation of power control signal, obtain the corresponding power control signal of said power grade, and this power control signal is sent to sender;
The watt level that said sender sends signal according to said power control signal adjustment.
6. method as claimed in claim 5 is characterized in that, if the adjustment instruction of said power when falling, said last emitted power grade is done to adjust accordingly after, as emitted power grade next time, comprising:
After step-length of last emitted power grade downward modulation, as emitted power grade next time.
7. method as claimed in claim 5 is characterized in that, if the adjustment instruction of said power is when rising UP, said last emitted power grade is done to adjust accordingly after, as emitted power grade next time, comprising:
A, confirm whether poor more than or equal to said maximum rated power output side-play amount downward of said power output with it; If, with last emitted power grade as emitted power grade next time, otherwise; This step-length is made as current effective step-length, gets into step B;
B, judge that said power output and current effective step-length sum are whether greater than said maximum rated power output side-play amount sum that makes progress with it, if then get into step C, otherwise get into step D;
C, judge whether current effective step-length equals 1dB, if, then with last emitted power grade as next emitted power grade, otherwise current effective step-length is deducted 1dB as current effective step-length, and returns step B and judge again;
D, last emitted power grade is raised a current effective step-length, as emitted power grade next time.
8. method as claimed in claim 5 is characterized in that, the power detection value of said preservation and the corresponding relation of power output comprise:
Before the operate as normal of said terminal, when power amplifier transmitted reference power output, preserve current power detection value, and preserve said benchmark power output;
When the reference output power signal that the power amplifier emission is preset, obtain current power detection value;
According to said power detection value and reference output power, and the benchmark power output and the power detection value of preserving, calculate the coefficient of the linear relationship of confirming power detection value and power output, and preserve said coefficient.
9. method according to claim 5 is characterized in that, the power grade of said setting and the corresponding relation of power control signal comprise:
Before the operate as normal of said terminal, launch the power of all grades respectively at power amplifier, and preserve power control signal corresponding when launching each power grade;
Judge the power grade of each group and the proportionate relationship between the power control signal; Power control signal to departs from linear relation carries out the line match, the power grade of preserving before the corresponding relation renewal match with the power grade of each group after the match and power control signal and the corresponding relation of power control signal.
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|---|---|---|---|
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| CN101790226B (en) * | 2009-12-29 | 2014-06-11 | 中兴通讯股份有限公司 | Method and device for adjusting power amplifier voltage of wireless communication system |
| CN102404831B (en) * | 2011-10-19 | 2014-08-27 | 惠州Tcl移动通信有限公司 | Inner loop power control method for wideband code division multiple access (WCDMA) mobile terminal |
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