CN1124750C - Method for controlling wide band GSM multi-carrier closed loop power and device thereof - Google Patents
Method for controlling wide band GSM multi-carrier closed loop power and device thereof Download PDFInfo
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- CN1124750C CN1124750C CN 00117005 CN00117005A CN1124750C CN 1124750 C CN1124750 C CN 1124750C CN 00117005 CN00117005 CN 00117005 CN 00117005 A CN00117005 A CN 00117005A CN 1124750 C CN1124750 C CN 1124750C
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Abstract
The present invention relates to a GSM multicarrier closed loop power controller. The controller comprises a radio-frequency down converter 121, an A/D converter 120, a plurality of digital down converters 117 to 119, a plurality of base-band processing units 101 to 103, a plurality of digital up converters 104 to 106, a plurality of digital multipliers 107 to 109, a digital adder 110, a D/A transducer 111, an attenuator 112, a broadband transmitter 113 and a power control module 116, wherein the power control module 116 receives configuration power control data and each carrier frequency information, calls corresponding up and down slope cure data to obtain dynamic power control data and static power control data and simultaneously receives processed power envelop data actually detected.
Description
Technical field
The present invention relates to a kind of method for controlling wide band GSM multi-carrier closed loop power.
Background technology
Gsm communication system is a kind of digital cellular mobile communication systems the most ripe in the world at present and that the market occupancy volume is maximum, the digital wireless communication technology that it adopts FDMA to combine with TDMA.One of effective measures that it improves power system capacity are to improve the availability of frequency spectrum, and the concrete manifestation form is to reduce the interference of interchannel.Power control is to reduce the important means that multiple access disturbs, and this shows the necessity of carrying out power control in communication system.
The principle of power control is: self adaptation reduction transmitter transmitting power when not needing maximum transmission power just can reach the situation of good transmission quality.Promptly guaranteeing that transmission quality is higher than the average transmit power that reduces travelling carriage and base station under the prerequisite of given thresholding, thereby reducing interference other channel.Power is controlled at and occupies consequence in the sender, and the quality of a sender performance quality depends on the performance of power control to a great extent.
The power of the broad band multicarrier gsm system control new problem that to be the GSM base station occurred in the evolution process of broadband by the arrowband, it also is the difficult problem that broad band multicarrier GSM base station must solve.Multi-carrier signal is the synthetic of each single-carrier signal, the uncertainty of the frequency of each carrier wave and the changeability of power and multicarrier composite signal envelope, and all control has brought very big difficulty to multi-carrier power for these.
Summary of the invention
The object of the invention is to provide a kind of close-loop power controlling method based on the wide band GSM base station, thereby is able to the variation of adaptive tracing carrier power, the control precision height, and can change the transmitting power of the arbitrary time slot of any carrier wave flexibly and easily.
To achieve these goals, a kind of method for controlling wide band GSM multi-carrier closed loop power, it comprises the following steps: power control data and each carrier frequency information of configuration are carried out control and treatment, promptly call corresponding climb and fall curve data with each carrier frequency information according to the power control data that receives, obtain the dynamic power control data, and corresponding static power control data, and output; Some signals that will be coupled and from antenna opening after radio frequency down-conversion and if sampling are handled, by the multichannel separation algorithm with each CF signal separately, obtain every road CF signal emitted power envelope data in real time; In addition, according to the power controlling grade information that receives and each carrier frequency information, can calculate the transmission envelop power curve of ideal power control; The power envelope data that dynamic power control data and actual detected by real-time each carrier frequency of comparison arrives, calculate the gain controlling trend of each carrier frequency, export revised each dynamic power control data, utilize each revised dynamic power control data to realize the dynamic power control and power climbing control of real-time every road carrier frequency; To obtain the multi-carrier signal after multichannel is synthesized through each the circuit-switched data summation after the dynamic power control, after the digital-to-analogue conversion processing, and, realize static power control according to above-mentioned static power control data, after the wide band radio-frequency emission is handled, go out this multi-carrier signal then by antenna transmission.
Above-mentioned a kind of method for controlling wide band GSM multi-carrier closed loop power, wherein, the climb and fall curve data can be obtained by the method for direct output of RAM or interpolation filtering.
Adopted above-mentioned degenerative closed-loop control dress method, to pass through detection to the multicarrier composite signal, isolate the power envelope data of each carrier frequency, according to control algolithm every road carrier wave is realized power control then, the control of the static power of each carrier wave can be controlled by attenuator together in radio frequency part, thus variation that can the adaptive tracing carrier power, the control precision height, and can realize simultaneously the power control of a plurality of carrier waves making it satisfy the requirement of time domain and frequency domain template.Before multichannel is synthetic, realize the dynamic power control and the climb and fall control of each carrier wave, the dynamic power control and the climb and fall control of each carrier wave are separate, static power control separates with dynamic power control, realize in radio frequency part separately, can change the transmitting power of the arbitrary time slot of any carrier wave flexibly and easily.In addition, the climb and fall power control curve that different dynamic power grades is corresponding different, dynamic power control and climb and fall are controlled at numeric field and realize, power control curve smoothing transition when power grade switches.
The present invention is further illustrated below in conjunction with embodiment and accompanying drawing.
Description of drawings
Fig. 1 is the related circuit block diagram of a kind of method for controlling wide band GSM multi-carrier closed loop power of the present invention.
Embodiment
A kind of method for controlling wide band GSM multi-carrier closed loop power of the present invention, the circuit structure that it is related, as shown in Figure 1, it comprises:
Power control module 116, receive power control data and each carrier frequency information of configuration, call corresponding climb and fall curve data, obtain the dynamic power control data, and corresponding static power control data, receive the power envelope data after treatment that actual detected arrives simultaneously; Radio frequency down-conversion device 121 receives a part of signal realization down-conversion that is coupled and from antenna opening, the output analog if signal; Analog to digital converter 120 receives the analog if signal from described radio frequency down-conversion device 121 outputs, realizes analog-to-digital conversion; Several digital low-converters 117～119, receive the digital medium-frequency signal of described analog to digital converter 120 outputs respectively, carry out the multichannel separation algorithm separately, obtain the power envelope data of each road CF signal in real time each CF signal, and to described power control module 116 outputs; Some baseband processing units 101～103 are realized the Base-Band Processing of each channel; Number of digital upconverter 104～106, the corresponding one by one respectively baseband signal that receives from each baseband processing unit realizes Digital Up Convert; Number of digital multiplier 107～109, the corresponding one by one respectively signal that receives from each digital up converter output, and from described power control module 116, obtain the dynamic power control data respectively, realize each carrier frequency power control; Digital adder 110 receives from the signal after each carrier frequency power control of each digital multiplier 107～109 outputs, realizes that multichannel is synthetic; Digital to analog converter 111 receives the multichannel of the described digital adder 110 outputs digital signal after synthetic, realizes digital-to-analogue conversion; Attenuator 112 receives the analog signal of described digital to analog converter 111 outputs and the static control data of described power control module 116 outputs, carries out the decay of signal; Broadband sender 113 receives the signal that described attenuator 112 is exported, and realizes RF up-converter, by antenna signal is launched.
Above-mentioned broad band multicarrier negative feedback closed loop Poewr control method is: the multi-carrier signal of returning that earlier antenna opening is coupled carries out separating of down-conversion and multichannel carrier, control curve by processing according to certain algorithm output climb and fall at digital signal processor to the input and output power envelope, static power is controlled at the synthetic back of multichannel and realizes by attenuator, and the climbing control curve of each carrier wave seamlessly transits when power grade switches.
As can be seen from Fig. 1, from antenna opening a part of signal energy that is coupled, after radio frequency down-conversion and if sampling are handled, by digital down converter (DDC) and multichannel separation algorithm each CF signal is separated, at this moment can obtain every road CF signal in real time at sometime transmission envelop power.Power control module 116 can calculate the transmission envelop power curve of ideal power control according to the power controlling grade information and each carrier frequency information that receive on the other hand.The power envelope curve (needing the time-delay of the whole loop of consideration) that the ideal power control curve of power control module 116 by real-time each carrier frequency of comparison and actual detected arrive, calculated the gain controlling trend of each carrier frequency digital down converter (DUC) and adjusted gain control data is delivered to corresponding multiplication module 107,108,109 in real time by power control module 116, the final purpose of power control is the power control curve that can both obtain approximate ideal at each carrier frequency of antenna opening delivery outlet.Dynamic power control is controlled in each carrier frequency DUC104,105,106 multiplication module 107,108,109 afterwards with climb and fall control branch carrier frequency and finishes, the signal of each road after dynamic power control given summation module 110 again and sued for peace, the multi-carrier signal after obtaining synthesizing.As seen dynamic power control comes control figure multiplier 107,108,109 to realize by power control module 116, and static power control realizes by power control module 116 control static powers.
Method of the present invention is used for the GSM broadband multi-carrier base station, is used to realize the power control of each carrier wave, and the step of the multi-carrier closed-loop power control of realization is:
The first step, DUC104～106 receive corresponding baseband signal 101～103, realize Digital Up Convert, and output signal is given corresponding multiplier 107～109.
In second step, power control module 116 received power control datas and each carrier frequency information 115 calculate the dynamic power control data and the climb and fall curve data of each carrier frequency, and provide corresponding static power control data 123.
The 3rd step, the a part of signal that is coupled and from antenna opening, after radio frequency down-conversion 121 and 120 processing of if sampling ADC module, by digital down converter DDC117～119 and multichannel separation algorithm separately, obtain every road CF signal in real time in sometime transmitting power envelope data with each CF signal.
The 4th step, the power envelope data (needing the time-delay of the whole loop of consideration) that the dynamic power control curve of power control module 116 by real-time each carrier frequency of comparison and actual detected arrive, calculate the gain controlling trend of each carrier frequency DUC and adjusted gain control data is delivered to corresponding multiplication module 107～109 in real time, realize the dynamic power control and power climbing slope control of every road carrier frequency 107～109 li of multiplication module.
The 5th step, multiplication module 107～109 output signals obtain the multi-carrier signal of multichannel after synthetic by summation module 110, realize static power control at attenuator 112 places through DAC module 111 backs, wherein rate of static power data 123 are produced by power control module 116 and deliver to attenuator 112, and multi-carrier signal is sent by antenna 114 behind wide band radio-frequency transmitter module BTX113 then.
The present invention needs MN bar climb and fall control data curve altogether with rate of static power control and the control of dynamic power grade, climb and fall control separating controlling, and wherein M is the dynamic power controlling grade number that the base station is supported, N is a carrier number.In the specific implementation, power control module 116 calculates desirable control data according to each the carrier power data and each carrier frequency information 115 that receive, after comparing with the actual data of surveying then, obtain revised power control data, deliver to adder 110 simultaneously by the data of output enable after at last and add up each carrier multiplication.Delivering to the too low meeting of speed of the power climbing data of digital multiplier 107～109 introduces spuious, therefore the climbing data there is certain rate requirement, the climbing data of two-forty can directly be exported or the method for interpolation filtering obtains by RAM (memory), and high-speed figure multiplier 107～109 can be realized by special chip or FPGA (field programmable gate array).
Closed power control need detect the climb and fall curve of each carrier frequency, so for the broad band multicarrier system, each CF signal must be separated and control separately.Fig. 1 has adopted the negative feedback control mode, except that power control precision height, can also use the method for pre-distortion to reduce the non-linear influence to power control of whole transmission channel.
Closed power control needs in real time transmitting power to be carried out adaptive control, and operand is very big, and available high-speed dsp is realized.In the specific implementation, the problems such as linearity, closed loop time delay and power envelope signal extraction that also need taking into account system.Need add the accuracy that time delay compensates guaranteed output control, good device reduces the influence of device to power control to adopt the linearity as far as possible, adopts the multichannel separation method to obtain the power envelope of each carrier frequency.
In sum, the present invention has following characteristics:
1. close-loop control mode is adopted in power control, at the antenna opening coupled signal, detects in real time each year The power envelope data of ripple signal are used for relatively, realize power control, the control accuracy height.
2. each carrier wave is finished dynamic power control and climb and fall control before multichannel is synthetic, and not equal The climbing curve of level can arrange according to the actual requirements.
3. static power control separates with dynamic power control, realizes in radio frequency part separately.
4. the control of the power of each carrier wave is separate, can change flexibly and easily the arbitrary time slot of any carrier wave Transmitting power.
5. the rate of static power of every road carrier wave control, the control of dynamic power grade do not have with DUC104～106 Close, dynamic power control and climb and fall control are to come the control figure multiplier by power control module 116 107～109 realize, rate of static power control then realizes control by power control module 116 at analog domain System.
6. the control of climb and fall power realizes that by the high-speed figure multiplier control accuracy height has certain rate requirement to the climb and fall data in addition.
7. this method can make the climbing curve seamlessly transit when power grade switches, and avoids the sudden change that may exist at the power grade switching point.
Claims (2)
1. a method for controlling wide band GSM multi-carrier closed loop power is characterized in that it comprises the following steps:
Power control data and each carrier frequency information of configuration are carried out control and treatment, promptly call corresponding climb and fall curve data with each carrier frequency information according to the power control data that receives, obtain the dynamic power control data, and corresponding static power control data, and output;
Some signals that will be coupled and from antenna opening after radio frequency down-conversion and if sampling are handled, by the multichannel separation algorithm with each CF signal separately, obtain every road CF signal emitted power envelope data in real time; In addition, according to the power controlling grade information that receives and each carrier frequency information, can calculate the transmission envelop power curve of ideal power control;
The power envelope data that dynamic power control data and actual detected by real-time each carrier frequency of comparison arrives, calculate the gain controlling trend of each carrier frequency, export revised each dynamic power control data, utilize each revised dynamic power control data to realize the dynamic power control and power climbing control of real-time every road carrier frequency;
To obtain the multi-carrier signal after multichannel is synthesized through each the circuit-switched data summation after the dynamic power control, after the digital-to-analogue conversion processing, and, realize static power control according to above-mentioned static power control data, after the wide band radio-frequency emission is handled, go out this multi-carrier signal then by antenna transmission.
2. a kind of method for controlling wide band GSM multi-carrier closed loop power according to claim 1 is characterized in that: described climb and fall curve data can be obtained by the method for direct output of RAM or interpolation filtering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00117005 CN1124750C (en) | 2000-07-06 | 2000-07-06 | Method for controlling wide band GSM multi-carrier closed loop power and device thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 00117005 CN1124750C (en) | 2000-07-06 | 2000-07-06 | Method for controlling wide band GSM multi-carrier closed loop power and device thereof |
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| CN1333636A CN1333636A (en) | 2002-01-30 |
| CN1124750C true CN1124750C (en) | 2003-10-15 |
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| CN 00117005 Expired - Lifetime CN1124750C (en) | 2000-07-06 | 2000-07-06 | Method for controlling wide band GSM multi-carrier closed loop power and device thereof |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1298178C (en) * | 2003-09-28 | 2007-01-31 | 中兴通讯股份有限公司 | Multi-carrier auto-gain calibrating device and method |
| CN1960348B (en) * | 2005-10-31 | 2010-09-29 | 中兴通讯股份有限公司 | Multicarrier digital power calculation device |
| CN101075833B (en) * | 2007-06-27 | 2011-11-30 | 中兴通讯股份有限公司 | Method and apparatus for controlling closed-loop power of GSM evolution scheme with data speed ratio enchancement |
| CN101442508B (en) * | 2007-11-23 | 2011-05-11 | 中兴通讯股份有限公司 | Method and apparatus for implementing power time curve of zero intermediate frequency TDMA transmitter |
| US8036617B2 (en) * | 2008-12-15 | 2011-10-11 | Litepoint Corporation | Radio frequency (RF) signal generator and method for providing test signals for testing multiple RF signal receivers |
| CN101711053B (en) * | 2009-12-21 | 2012-11-28 | 中兴通讯股份有限公司 | Multi-carrier closed-loop power control device and method |
| CN103634250B (en) * | 2013-12-16 | 2017-04-12 | 深圳国人通信股份有限公司 | Method and device for restraining ground noise signal from upraising |
| CN105611619B (en) * | 2016-01-11 | 2018-10-23 | 中国电子科技集团公司第十研究所 | Multi-carrier power adaptation control circuit module |
| CN106936453B (en) * | 2016-12-23 | 2019-02-15 | 西安空间无线电技术研究所 | A kind of adaptive transmission power monitoring and compensation method |
| CN110958679B (en) * | 2018-09-27 | 2022-07-12 | 广东新岸线科技有限公司 | Method and device for obtaining high-precision transmitting power |
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Granted publication date: 20031015 |