CN100382454C - Equipment and method for stabilizing output power in base station - Google Patents
Equipment and method for stabilizing output power in base station Download PDFInfo
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- CN100382454C CN100382454C CNB2003101182456A CN200310118245A CN100382454C CN 100382454 C CN100382454 C CN 100382454C CN B2003101182456 A CNB2003101182456 A CN B2003101182456A CN 200310118245 A CN200310118245 A CN 200310118245A CN 100382454 C CN100382454 C CN 100382454C
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- 230000005540 biological transmission Effects 0.000 claims description 36
- 238000012937 correction Methods 0.000 claims description 13
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Abstract
The present invention relates to a device and a method for stabilizing the output power of a base station. The device for stabilizing the output power of a base station comprises a base band processing module, a transmitter and a gain calculation control module, wherein the base band processing module is used for calculating and adjusting the input signal power in a digit domain, the base band processing module reports the input signal power to the gain calculation control module, and input signals which are processed are input in the transmitter; the gain calculation control module is used for calculating the gain of a transmitting channel, and the gain calculation control module sends out control commands to the base band processing module and a receiving and transmitting module of the transmitter. The present invention has the method for stabilizing the output power of the base station, the method makes use of the device of the present invention, and the method comprises the following steps that the gain of the receiving and transmitting module of the transmitter is corrected to the standard gain respectively; the base station starts to enter an operating mode; the gain of the transmitting channel is adjusted circularly in real time.
Description
Technical field
The present invention relates to mobile communication system, particularly stablize the apparatus and method of base station power output.
Background technology
In mobile communication system, base station (Base Station) power output generally is not stable, can be subjected to the influence of various factors and produces fluctuation.The principal element that causes the output-power fluctuation of base station has: the variation of ambient temperature, base station analog circuit aging etc.The fluctuation of base station power output shows as: the power output difference of base station day and night, base station when just opening and the power output of work after a period of time different.The fluctuation of base station power output directly causes the variation of base station range, during the cellphone subscriber that causes network coverage edge and can access network, the time and can not access network, thereby must take related technical measures in actual applications to keep the stable of base station power output.
The radio frequency of base station (Radio Frequency) subsystem mainly is made of analog circuit.Compare with digital circuit, the characteristics of analog circuit are: its performance is subjected to such environmental effects big, and the consistency between same circuits is poor.Transmitter for Radio Frequency Subsystem, the power of its input signal is certain, the size of power output depends on the gain of transmitter transmission channel, the fluctuation of transmitter transmission channel gain will cause the fluctuation of power output, therefore, the control transmitting gain makes it keep stable the stable of power output that also just guaranteed.
The method that controls transmitter gain in the prior art as shown in Figure 1, transmitter generally is made up of transceiver module (101), mixer (102), power amplifier (103), duplexer (104).General gain compensating method is each inside modules designing gain correcting circuit, and proofreaies and correct in real time, makes the gain of each module keep stable.In the composition module of transmitter, mixer (102) and duplexer (104) are passive modules, and gain fluctuation is less, can not regulate.So mainly be to go up the designing gain correcting circuit at transceiver module (101) and power amplifier (104).The principle of gain calibration is: in the input and the output design power detecting circuit of module, the input signal of detection module and the power of output signal, and the CPU of reporting module (CPU), the actual gain of computing module.If actual gain is lower than the standard gain,, improve the transceiver module gain with regard to the gain correction circuit of adjustment module inside; Otherwise, just reduce the transceiver module gain.
In the existing technical scheme,, do not need to rely on outside stube cable to form loop because detection loop is in inside modules, implement more convenient, but have following defective:
1. the input power detection is the input in transceiver module (101), because the signal strength signal intensity here is minimum, on the one hand to the detection area requirement of wave detector than higher, on the other hand when small-signal, can there be bigger detection error in wave detector, thereby influences control precision;
2. the prior art scheme is only to there being source module to carry out gain compensation, but passive module (such as: the error cable of the connection of mixer (102), intermodule etc.) can't be proofreaied and correct;
3. must adopt a lot of power-sensing circuits during the circuit of prior art scheme constitutes, thereby accumulate bigger detection error, also increase circuit cost simultaneously.This defective especially in the transmitter that has a plurality of transceiver modules (101), embodies comparatively outstandingly.
Also have improved technical scheme of a class and technique scheme basic identical, just adopted big control loop, promptly respectively in the output detection power of the input and the power amplifier module (103) of transceiver module (101), the gain of calculating whole passage, thus carry out gain compensation.But,, also only defective (2) is had some improvement, and defective (1) and (3) of key is not still had improvement effect even adopt described improvement project.
Summary of the invention
The present invention just is being based on the purpose of improving the prior art defective, proposes a kind of device and method of controlling the base station power output.
The device of a kind of stable base station of the present invention power output comprises: baseband processing module, transmitter and gain calculating control module;
Described baseband processing module is handled input signal and is imported transmitter module, calculates input signal power and reports input signal power to the gain calculating control module;
Described transmitter module comprises transceiver module, mixer, power amplifier, duplexer and power-sensing circuit, transceiver module receives from the signal of baseband processing module and transfers to mixer, mixer closes signal and exports through power amplifier, duplexer successively after handle on the road, and the output power value of power-sensing circuit detection power amplifier also reports the gain calculating control module;
The gain calculating control module is used to calculate the transmission channel gain, and sends control command to baseband processing module and transceiver module.
The transceiver module of described transmitter comprises the D/A change-over circuit.
The method of a kind of stable base station of the present invention power output may further comprise the steps:
A. the gain of each transceiver module of correct transmission machine is to the standard gain;
B. start the base station and enter running status;
C. the gain calculating control module is calculated the transmission channel actual gain;
D. relatively actual gain and standard gain if actual gain equals the standard gain, is returned step C, otherwise is continued;
E. regulate input signal power, if the gain of actual gain overgauge reduces input signal power, otherwise, improve input signal power, return step C.
Described steps A specifically may further comprise the steps:
A1. input needs the transmission channel of the transmitter of correction;
A2. close other transmission channels;
A3. import a test signal to passage to be corrected, report input signal power to the gain calculating control module;
A4. power-sensing circuit detects output signal power and reports to the gain calculating control module;
A5. the gain calculating control module is calculated the transmission channel gain, and relatively whether the actual gain of being calculated is within critical field, if then go to steps A 7, otherwise continue;
A6. regulate the gain of transceiver module, if the gain of actual gain overgauge reduces the gain of transceiver module, otherwise A3 is returned in the gain that increases transceiver module;
A7. judge whether the passage that is still waiting to proofread and correct, if, return steps A 1, otherwise, go to step B.
Described step C specifically may further comprise the steps:
C1. baseband processing module calculates the input signal power sum of all transceiver modules, reports result of calculation to the gain calculating control module;
C2. power-sensing circuit detects output signal power and reports to the gain calculating control module;
C3. the gain calculating control module is calculated the transmission channel actual gain.
Described baseband processing module is to calculate input signal power at numeric field.
According to the method for the invention, for improving control precision, described step C1 also comprises the calculating of carrying out each transceiver module input signal average power, specifically may further comprise the steps:
C11. set a time period;
C12. baseband processing module calculates all input signal powers of each transceiver module in the set time period respectively, and asks the average power of each transceiver module input signal respectively;
C13. calculate each transceiver module input signal average power sum, and report to the gain calculating control module.
Described step C2 also comprises the calculating of carrying out the output signal average power, specifically may further comprise the steps:
C21. make repeated detection power output in the time period that power-sensing circuit sets in described step C11;
C22. ask the average power of the power output of surveying and report calculation control module.
Utilize the apparatus and method of stable base station of the present invention power output, can improve the control precision of base station power output, the error that passive component on the correct transmission passage (as mixer, duplexer) is introduced, the control circuit of simplification base station power output is saved cost.
Description of drawings
Fig. 1 is existing Radio Frequency Subsystem structural representation;
Fig. 2 is the structural representation of stable base station of the present invention power output device;
Fig. 3 is a flow chart of proofreading and correct each transceiver module gain among the method for the invention embodiment;
Fig. 4 is a flow chart of regulating the transceiver channel actual gain among the method for the invention embodiment.
Embodiment
Now in conjunction with the embodiments and conjunction with figs. describe apparatus and method of the present invention in detail.
As shown in Figure 2, the structural representation for stable base station power output device one embodiment of the present invention comprises transmitter, baseband processing module (105) and gain calculating control module (106).
Described transmitter is made up of transceiver module (101), mixer (102), power amplifier (103), duplexer (104).Wherein transceiver module is the digital-to-analogue mixing module; the inside comprises the D/A change-over circuit; the transceiver module output connects mixer; mixer closes the road to signal and handles after power amplifier exports duplexer to; also be connected with power-sensing circuit between power amplifier and the duplexer, power-sensing circuit can detect power output and report to gain calculating control module (106).
Described baseband processing module (105) is handled back input transmitter transceiver module to input signal, the power calculation that it comprised with regulate submodule and have in numeric field signal calculated power and function that signal power is regulated, input signal power reports to the gain calculating control module by baseband processing module.
Described gain calculating control module (106) is according to the input that receives, the gain that power output calculates transmission channel, and compares with the standard gain, sends corresponding regulating command according to comparative result.
Utilize the device of the stable base station power output that present embodiment provides to realize the purpose that power output is controlled, concrete control procedure is: before the base station entered normal operating conditions, the gain of proofreading and correct each transceiver module respectively was to standard value; After the startup base station entered normal operating condition, the gain of transceiver channel was regulated in circulation in real time.
A common transceiver module (101) can only be handled a carrier wave, and a power amplifier module (103) then can be handled a plurality of carrier waves.So can exist the output signal of a plurality of transceiver modules (101) is closed after the road handles (102), deliver to a power amplifier module (103) and amplify output.Like this, will occur between several transmission channels, existing common sparing is also by independent parts separately.Before operate as normal, the gain difference between the independent parts between each transmission channel must be corrected.The method of proofreading and correct is exactly that each transmission channel is corrected to the standard gain separately, and this process is also referred to as the initial gain trimming process, and its purpose is to eliminate gain intrinsic between each transmission channel.Then, after the base station enters normal operating conditions, the gain fluctuation of circulation real-time regulated transmission channel, this process also can be called the normal correction process, and its purpose is the gain fluctuation that factors such as compensation temperature and module wear out cause.
As shown in Figure 3, the initial gain correcting process is described as follows:
1. select and import target transmission channel to be corrected;
2. close other transmission channels, in order to avoid cause interference;
3. startup test signal, generally speaking, the power output of test signal is fixed, and is made as Pi;
4. utilize power-sensing circuit to detect the power output of power amplifier, be made as Po, power output is reported the gain calculating control module;
5. the gain calculating control module is calculated the gain G=Po-Pi of transmission channel, and with the standard gain G o of passage relatively, gain error E=G-Go.
6. judge gain error whether in error range, error range is 0.5dB-1dB generally speaking, if, just think that channel gain is normal, go to the adjustment that step 1 is carried out next transmission channel then; Otherwise, just need adjust the gain of passage;
7., such as the high xdB that gains than standard, adjust the gain adjustment circuit of transceiver module (101), with its gain decline xdB if gain error exceeds critical field; Otherwise if than the low xdB of standard gain, so just the gain with transceiver module (101) improves xdB;
8. return step 5, detect again, calculate and relatively gain;
9. judge whether the transmission channel that is still waiting to proofread and correct, if, return step 1, otherwise, beginning normal correction flow process.
After the module on each start or the replacing transmission channel, at first the transmission channel that needs are proofreaied and correct carries out the initial gain correction, up to the error of the actual gain of all transmission channels and standard gain within the standard error scope, proofread and correct through initial gain, the inherent variability of each transmission channel is just proofreaied and correct and is finished.After the operate as normal of base station, the normal gain correcting process of the transmission channel that just brings into operation is with the fluctuation of compensation temperature and the aging transmission channel gain that causes of module.
As shown in Figure 4, the normal correction process description is as follows:
1. after the operate as normal of base station, system start-up normal gain correcting process;
Baseband processing module (105) numeric field calculate be input to each transceiver module (101-1,101-2 ...) signal power, and calculate all power sums;
3. power-sensing circuit detects power output simultaneously, is made as Po ', and reports to the gain calculating control module;
4. gain calculating control module (106) is calculated the actual gain G '=Po '-Pi ' of radio-frequency channel, and compares with standard gain G o;
5. if G '=Go, then system does not do gain adjustment, goes to step 2 and directly enters correcting process next time, otherwise continue;
6. if G '＞Go, gain calculating control module (106) is just indicated baseband processing module (105) so, with all power decreasings that is input to the signal of transceiver module (101-1,101-2...), following tone pitch can be set according to actual conditions, for example 0.1dB at numeric field.If instead G '＜Go then will improve input signal power;
7. return step 2 and enter correcting process next time.
The real time output of general base station has fluctuation, the scope of fluctuation is relevant with the quantity of user terminal and distance etc., in order to improve correction accuracy, when base band is calculated input power in the step 2, get the mean value of all input signals in each transceiver module Δ t time, then mean value is summed up computing, be made as Pi ', it is reported gain calculating and control module (106).Also can do similar processing to output signal, power-sensing circuit (103) is also in the Δ t time, its power output of repeated detection, after doing on average, be made as Po ', it is reported gain calculating and control module (106), and the gain calculating control module is calculated actual gain with power average value, can realize higher control precision.
The normal correction flow process is the circulation real time execution, just proofreaies and correct once at regular intervals.Because it all is gradualization that temperature, module wear out, can not undergo mutation, so the time interval of proofreading and correct needn't be too fast.When normal correction, the gain error that no matter calculates has much, and gain calculating control module indication baseband processing module carries out small accurate adjustment to input signal, for example regulates 0.1dB.Reason is the error that power amplifier simulation detection produces, and may cause bigger gain calculating error, but not actual error is regulated 0.1dB at every turn and just can be avoided the influence of this error of calculation to cor-rection loop.
In sum, initial gain is proofreaied and correct " initial adjustment " process that can be regarded as, and it then is " accurate adjustment " process that normal gain is proofreaied and correct.The residual error of initial gain trimming process still can further be proofreaied and correct in the normal correction process.
Compare with the prior art scheme, this programme has following advantage:
1. the input signal power of transmission channel is by calculating at numeric field, and computational accuracy is very high, and It doesn't matter with signal large and small;
2. each transmission channel input power sum also is to be calculated at numeric field by baseband processing module, can not Produce accumulated error;
3. regulate the power of input signal at numeric field, come the gain of compensate for emission passage, compensation precision can Reach 0.1dB;
4. whole cor-rection loop 1 wave detector only provides cost savings greatly.
Claims (10)
1. the device of a stable base station power output is characterized in that, comprising: baseband processing module, transmitter module and gain calculating control module;
Described baseband processing module is handled input signal and is imported transmitter module, calculates input signal power and reports input signal power to the gain calculating control module;
Described transmitter module comprises transceiver module, mixer, power amplifier, duplexer and power-sensing circuit, transceiver module receives from the signal of baseband processing module and transfers to mixer, mixer closes signal and exports through power amplifier, duplexer successively after handle on the road, and the output power value of power-sensing circuit detection power amplifier also reports the gain calculating control module;
Described gain calculating control module is calculated the transmission channel gain, judges the deviation of actual gain and standard gain, sends control command according to judged result to baseband processing module and transceiver module.
2. the device of stable base station as claimed in claim 1 power output is characterized in that the transceiver module of described transmitter comprises the D/A change-over circuit.
3. the method for a stable base station power output, this method is used the described device of claim 1, it is characterized in that, may further comprise the steps:
A. the gain of each transceiver module of correct transmission machine is to the standard gain;
B. start the base station and enter running status;
C. the gain calculating control module is calculated the transmission channel actual gain;
D. relatively actual gain and standard gain if actual gain equals the standard gain, is returned step C, otherwise is continued;
E. regulate input signal power, if the gain of actual gain overgauge reduces input signal power, otherwise, improve input signal power, return step C.
4. the method for stable base station as claimed in claim 3 power output is characterized in that described steps A specifically may further comprise the steps:
A1. input needs the transmission channel of the transmitter of correction;
A2. close other transmission channels;
A3. import a test signal to passage to be corrected, report input signal power to the gain calculating control module;
A4. power-sensing circuit detects output signal power and reports to the gain calculating control module;
A5. the gain calculating control module is calculated the transmission channel gain, and relatively whether the actual gain of being calculated exists
Within the critical field, if then go to steps A 7, otherwise continue;
A6. regulate the gain of transceiver module, if the gain of actual gain overgauge reduces the gain of transceiver module, otherwise A3 is returned in the gain that increases transceiver module;
A7. judge whether the passage that is still waiting to proofread and correct, if, return steps A 1, otherwise, go to step B.
5. the method for stable base station as claimed in claim 3 power output is characterized in that described step C specifically may further comprise the steps:
C1. baseband processing module calculates the input signal power sum of all transceiver modules, reports result of calculation to the gain calculating control module;
C2. power-sensing circuit detects output signal power and reports to the gain calculating control module;
C3. the gain calculating control module is calculated the transmission channel actual gain.
6. the method for stable base station as claimed in claim 5 power output is characterized in that, described baseband processing module is to calculate input signal power at numeric field.
7. the method for stable base station as claimed in claim 5 power output is characterized in that, described step C1 also comprises the calculating of carrying out each transceiver module input signal average power, specifically may further comprise the steps:
C11. set a time period;
C12. baseband processing module calculates all input signal powers of each transceiver module in the set time period respectively, and asks the average power of each transceiver module input signal respectively;
C13. calculate each transceiver module input signal average power sum, and report to the gain calculating control module.
8. the method for stable base station as claimed in claim 5 power output is characterized in that described step C2 also comprises the calculating of carrying out the output signal average power, specifically may further comprise the steps:
C21. make repeated detection power output in the time period that power-sensing circuit sets in described step C11;
C22. ask the average power of the power output of surveying and report calculation control module.
9. the method for stable base station as claimed in claim 3 power output is characterized in that, regulates input signal power by baseband processing module in the described step e, and regulated value is 0.1dB.
10. the method for stable base station as claimed in claim 4 power output is characterized in that, described test signal is the fixing signal of a power.
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| CNB2003101182456A CN100382454C (en) | 2003-12-08 | 2003-12-08 | Equipment and method for stabilizing output power in base station |
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| CNB2003101182456A CN100382454C (en) | 2003-12-08 | 2003-12-08 | Equipment and method for stabilizing output power in base station |
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| CN100382454C true CN100382454C (en) | 2008-04-16 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101079664B (en) * | 2006-05-23 | 2014-07-30 | 大唐移动通信设备有限公司 | A detection method and device of base station power of TD-SCDMA system |
| CN101316128B (en) * | 2008-06-30 | 2012-07-04 | 华为技术有限公司 | Method for improving transmitter efficiency and transmitter |
| CN101582682B (en) | 2009-06-12 | 2011-12-28 | 华为技术有限公司 | Power amplifier and transmitter |
| CN102065531B (en) * | 2009-11-13 | 2014-06-11 | 中兴通讯股份有限公司 | Power calibrating method and device |
| CN102387522B (en) * | 2010-08-31 | 2015-11-25 | 中兴通讯股份有限公司 | The modification method of Remote Radio Unit Power control model and device, checkout equipment |
| CN103002552B (en) * | 2011-09-08 | 2016-05-11 | 联芯科技有限公司 | Acquisition methods, automatic power control method and the device of automated power control code table |
| CN106571879A (en) * | 2015-10-12 | 2017-04-19 | 中兴通讯股份有限公司 | Power detection method and device |
| CN109451573B (en) * | 2018-12-25 | 2021-05-28 | 京信通信系统（中国）有限公司 | AGC control method, device and system with self-adjusting gain distribution |
| CN112769504B (en) * | 2021-01-25 | 2023-04-21 | 展讯通信（上海）有限公司 | Transmission power calibration method, electronic device, and storage medium |
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| CN1254222A (en) * | 1998-11-12 | 2000-05-24 | 日本电气株式会社 | Transmitting power control method of code-division multiple address communication system and its system |
| US20010019961A1 (en) * | 2000-03-03 | 2001-09-06 | Naruhito Nakahara | Base station apparatus, mobile communication system, and method of controlling transmission power |
| CN1371547A (en) * | 1999-08-31 | 2002-09-25 | 美商内数位科技公司 | Adaptive RF amplifier prelimiter |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1254222A (en) * | 1998-11-12 | 2000-05-24 | 日本电气株式会社 | Transmitting power control method of code-division multiple address communication system and its system |
| CN1371547A (en) * | 1999-08-31 | 2002-09-25 | 美商内数位科技公司 | Adaptive RF amplifier prelimiter |
| US20010019961A1 (en) * | 2000-03-03 | 2001-09-06 | Naruhito Nakahara | Base station apparatus, mobile communication system, and method of controlling transmission power |
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