CN1348262A - Base station power controlling method and device - Google Patents
Base station power controlling method and device Download PDFInfo
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- CN1348262A CN1348262A CN 00130706 CN00130706A CN1348262A CN 1348262 A CN1348262 A CN 1348262A CN 00130706 CN00130706 CN 00130706 CN 00130706 A CN00130706 A CN 00130706A CN 1348262 A CN1348262 A CN 1348262A
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Abstract
A base station power control device includes base belt processing unit, power plate data storage unit, FPGA, digital up frequency transformer, DDS, digital orthogonal modulating unit, digit-analog converting unit, radio-frequency module and antenna. Its control method is obtaining the base belt signal with power control signal by mutliplying the initial base belt signal with power form panel data, then to obtain high speed rate of base belt signal by filtering and digit up frequency conversion, after it being orthongonal modulated with orthogonal carrier wave signal to obtain analog base belt modulating signal through digit-analog converting, to send the signal or the harmonic wave image of the signal as a intermediate, frequency into radio-frequency module, the intermediate signal with power control being up converted and amplified for transmission by utilizing the radio-frequency module and antenna as a channel.
Description
The present invention relates to the base station power control in the wireless communication system, be specially the power control that realizes radio communication system base station by digital technology.
In cell mobile communication systems, comprise global system for mobile communications (GSM), code division multiple access (CDMA) and Wideband Code Division Multiple Access (WCDMA) (WCDMA) system, the signal connecting quality between base station and the user terminal constantly changes.The cause of this variation comes from the multiple disturbing factor on the wireless path, for example: multipath fading, near-far problem, Doppler effect etc.In addition, user terminal is to each other with respect to the base station random distribution, square rising along with the increase of distance of the signal energy loss between base station and user terminal.In order to improve the utilance of frequency spectrum, minimizing is to the interference of other callings, prolong the battery life of user terminal simultaneously, need guarantee under the good condition that receives, reduce transmitting power as far as possible, but worsen and when having influenced the reception of signal, need again when cellular environment by improving transmitting power, guarantee the quality of transfer of data, that is to say assurance speech quality.Power control is meant within the specific limits, changes user terminal or base station's transmission power with wireless mode.
The control of existing base station power has two kinds of closed loop and open loops.Fig. 1 is the theory diagram of base station closed power control, the analog signal of base station processing unit 10 outputs is through after the quadrature modulation 11, send into up-conversion 12, signal is modulated to radio frequency (RF) territory, the purpose of attenuator 13 is to adjust the signal power strength of sending into power amplifier 14, and the modulation signal that power amplifier 14 amplifies is sent into antenna 19 by coupler 15 and launched.Be coupled out a part of signal by coupler 15, give analog to digital converter (ADC) 18, to detect the signal transmission power of antenna 19, and with this as criterion, control the output voltage values of digital to analog converter (DAC) 16, by operational amplifier 17, signal is added to attenuator 13 then, further the control power output makes power output reach requirement.This closed power control is effective to the modulation (GMSK) of permanent envelope, and is then powerless for the modulation signal of non-permanent envelope.In addition, this scheme is based on the basis of persistent wave, because the principle that closed loop is followed the tracks of is sampled to output exactly, according to sampled result input is adjusted then, and output is stabilized on the desired value.If output amplitude changes, its amplitude can be subjected to the loop adjustment and distortion under closed-loop case.To EDGE (Enhanced Data rates for Global/GSM Evolution strengthens data transfer rate type GSM) and CDMA, when being, amplitude becomes, by the modulating data decision, can't be measurable, so the closed power controlling schemes can not be used.
Fig. 2 is the theory diagram of base station open Loop Power control, and the difference of controlling with closed power is few feedback loop, promptly lacks a coupler and an analog to digital converter.Open Loop Power control can separate permanent envelope by no means the power control problem of modulation signal, but the precision of power control is very poor, the power departure can reach 10db when maximum.
The objective of the invention is to solve above-mentioned defective of the prior art, a kind of digital power control method of base station is provided and realizes the device of this method, the control of digital modulation and power all is placed on numeric field to be finished, realize the power control of non-constant envelope signal, ensure the precision of power control simultaneously again.
For achieving the above object, a kind of base station power control method provided by the invention may further comprise the steps:
Raw baseband signal and power template data are multiplied each other obtain baseband signal with power control information;
The baseband signal of band power control information obtains the two-forty baseband signal through filtering and Digital Up Convert;
Described two-forty baseband signal and carrier signal are modulated;
Baseband signal after the modulation is after digital-to-analogue conversion, and the modulated signal that obtains simulating is got the harmonic wave of modulated signal and sent into radio-frequency module as intermediate-freuqncy signal;
Radio-frequency module carries out up-conversion with above-mentioned intermediate-freuqncy signal and obtains radiofrequency signal, amplifies after the antenna emission.
Described carrier signal is the carrier signal of quadrature, and described two-forty baseband signal and carrier signal are carried out quadrature modulation.
In the described Poewr control method, before intermediate-freuqncy signal is sent into radio-frequency module, earlier intermediate-freuqncy signal is carried out filtering.
For realizing above-mentioned Poewr control method, base station power control device provided by the invention comprises: baseband processing unit, power template data storage cell; The programmable gate array (FPGA) that the power template data that the raw baseband signal and the power template data storage cell of baseband processing unit output are exported multiply each other; Multiplied result is carried out the digital up converter of filtering and Digital Up Convert; The orthogonal signalling generation unit; The two-forty baseband signal that up-conversion is obtained is modulated to the digital modulation unit on the carrier signal; With the signal D/A conversion unit that carries out digital-to-analogue conversion after the modulation; Radio-frequency module and antenna.
Described orthogonal signalling generation unit is for producing the Direct Digital synthesis unit of orthogonal signalling.
Described digital modulation unit is the digital quadrature modulating unit.
Described output control device also has a radio frequency low pass filter between D/A conversion unit and radio-frequency module.
Because the present invention is directly multiplied each other original base band digital signal and power control template data, utilize DDS (Direct Digital is synthetic) to obtain phase place, amplitude information consistency orthogonal signalling preferably then, carry out digital modulation at numeric field, carry out digital-to-analogue again and change.Therefore the present invention can realize the power control of non-constant envelope signal, also can realize than high control precision simultaneously, and can satisfy the requirement of agreement to power control, hardware circuit is realized also simple relatively in addition.
Below in conjunction with drawings and Examples the present invention program is described further.
Fig. 1 base station of the prior art closed power control principle block diagram;
Fig. 2 base station of the prior art open Loop Power control theory diagram;
Fig. 3 embodiment of the invention theory diagram.
Fig. 1 and Fig. 2 are the theory diagram of prior art, describe in the front, do not repeat them here.
As shown in Figure 3, the base station power control device comprises baseband processing unit 31, power template data storage cell 32, FPGA33, digital up converter 34, digital quadrature modulating unit 35, Direct Digital synthesis unit 36, D/A conversion unit 37, radio-frequency module 38 and antenna 39.FPGA33 multiplies each other the raw baseband signal (I, Q signal) of baseband processing unit 31 outputs and the power template data of power template data storage cell 32 outputs; 34 pairs of multiplied result of digital up converter are carried out filtering and are carried out digital up-conversion, obtain the high speed baseband signal; Direct Digital synthesis unit 36 produces phase place and reasonable sine of amplitude information consistency and cosine orthogonal signalling; Digital quadrature modulating unit 35 is made up of multiplier, and the two-forty baseband signal that up-conversion is obtained is modulated on the orthogonal signalling; Signal after D/A conversion unit 37 will be modulated carries out digital-to-analogue conversion; Radio-frequency module 38 and antenna 39, intermediate-freuqncy signal up-conversion, the amplification of the control of band power and are launched as passage.Because noise and clutter in the intermediate-freuqncy signal can influence signal quality, thus between radio-frequency module and antenna, add a low pass filter, to leach noise and the clutter in the signal.
Below in conjunction with Fig. 3 the base station digital power control method is described in detail.
Can see by Fig. 3, baseband processing unit 31 is exported to FPGA with original baseband signal I, Q, provide the power template data to multiply each other by multiplier among the FPGA and power template data storage cell 32, obtain having baseband signal I ', the Q ' of power control information; The power template data in advance is stored in power template data storage 32, is to be required to determine according to power that receives signal and agreement (referring to the GSM/EDGE/WCDMA agreement) by base station controller (BSC).
Baseband signal I ', the Q ' of band power control frequency converter 34 in number obtains the baseband signal of two-forty through Filtering Processing and Digital Up Convert; This high speed baseband signal is modulated in digital quadrature modulating unit 35 and carrier signal, described carrier signal is that these orthogonal signalling have good phase place, amplitude information consistency by sine, the cosine signal of the quadrature of Direct Digital synthetic (DDS) unit 36 generations.
Baseband signal after quadrature modulation is sent into digital-to-analogue conversion (DAC) unit 37 and is carried out digital-to-analogue conversion, and the baseband modulation signal that obtains simulating is got wherein harmonic wave image signal as intermediate frequency, sends into radio-frequency module 38; Because sending into the data of analog to digital converter is the base band data that has power control information, so the Analog Baseband modulation signal and the intermediate-freuqncy signal that obtain also have power control information, the intermediate-freuqncy signal that has power control information is obtained radio frequency (RF) signal through up-conversion, then through power amplification, output to antenna 39 emissions, realize the digital power control of base station.
In order to remove noise and the clutter in transmitting better, intermediate-freuqncy signal can also be carried out filtering through the radio frequency low pass filter earlier before sending into radio-frequency module.
Modulated carrier is realized by synthetic (DDS) technology of Direct Digital among the present invention, produce phase place, amplitude information the consistency sine and the cosine carrier signal of quadrature preferably, by multiplier baseband signal and carrier signal are carried out the digital quadrature modulation in digital quadrature modulating unit of the present invention, expression formula can be written as f, and (t)=I ' (t)
*(wt)+Q ' (t) for COS
*SIN (wt).The climbing curve representation formula of supposing the output of power template data is g (t), and the orthogonal demodulation signal expression formula is: fg (t)=g (t)
*F (t)=g (t)
*[I ' (t)
*(wt)+Q ' (t) for COS
*SIN (wt)]=g (t)
*I ' (t)
*COS (wt)+g (t)
*Q ' (t)
*SIN (wt)
Make Ig (t)=g (t)
*I (t), Qg (t)=g (t)
*Q (t);
Fg (t)=Ig (t) then
*COS (wt)+Qg (t)
*SIN (wt)
As seen, I, Q signal are imported modulating unit after with the weighting of climbing curve again modulate with the output modulated signal is weighted and can obtain identical power control effect, but on circuit is realized relatively the conventional power control method want simply.
Claims (10)
1, a kind of base station power control method may further comprise the steps:
Raw baseband signal and power template data are multiplied each other obtain baseband signal with power control information;
The baseband signal of band power control information obtains the two-forty baseband signal through filtering and Digital Up Convert;
Described two-forty baseband signal and carrier signal are modulated;
Baseband signal after the modulation is after digital-to-analogue conversion, and the baseband modulation signal that obtains simulating is got the harmonic wave image signal of this signal or this signal and sent into radio-frequency module as intermediate-freuqncy signal;
Radio-frequency module and antenna are sent into the intermediate-freuqncy signal up-conversion of band power control, amplification antenna, and are launched as passage.
2, base station power control method as claimed in claim 1 is characterized in that: before intermediate-freuqncy signal is sent into radio-frequency module, earlier intermediate-freuqncy signal is carried out filtering.
3, base station power control method as claimed in claim 1 or 2 is characterized in that: described carrier signal is the carrier signal of quadrature, and described two-forty baseband signal and carrier signal are carried out quadrature modulation.
4, base station power control method as claimed in claim 3 is characterized in that: described carrier signal is the sine and the cosine signal of quadrature.
5, base station power control method as claimed in claim 3 is characterized in that: described carrier signal is to produce by Direct Digital is synthetic;
6, base station power control method as claimed in claim 4 is characterized in that: the sine of described quadrature and cosine signal are to produce by Direct Digital is synthetic.
7, a kind of device of base station power control method as claimed in claim 1 of realizing comprises baseband processing unit, radio-frequency module, antenna, it is characterized in that: also comprise the power model data storage cell; The programmable gate array that the power template data that the raw baseband signal and the power template data storage cell of baseband processing unit output are exported multiply each other; Multiplied result is carried out the digital up converter of filtering and up-conversion; The carrier signal generation unit; The two-forty baseband signal that up-conversion is obtained is modulated to the digital modulation unit on the carrier signal; With the signal D/A conversion unit that carries out digital-to-analogue conversion after the modulation.
8, output control device as claimed in claim 7 is characterized in that: described output control device also has a filter between D/A conversion unit and radio-frequency module.
9, as claim 7 or 8 described output control devices, it is characterized in that: described carrier signal generation unit is for producing the Direct Digital synthesis unit of orthogonal signalling.
10, as claim 7 or 8 described output control devices, it is characterized in that: described digital modulation unit is the digital quadrature modulating unit, and described quadrature modulation unit is a multiplier.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00130706 CN1110155C (en) | 2000-10-09 | 2000-10-09 | Base station power controlling method and device |
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|---|---|---|---|
| CN 00130706 CN1110155C (en) | 2000-10-09 | 2000-10-09 | Base station power controlling method and device |
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| CN1348262A true CN1348262A (en) | 2002-05-08 |
| CN1110155C CN1110155C (en) | 2003-05-28 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100376086C (en) * | 2004-08-16 | 2008-03-19 | 美国博通公司 | Method and system by digital baseband transmitter with digital rf/if support in gsm/gprs/edge compliant handsets |
| CN100384268C (en) * | 2003-07-26 | 2008-04-23 | 华为技术有限公司 | A transceiver singleboard |
| CN100459767C (en) * | 2005-05-27 | 2009-02-04 | 华为技术有限公司 | Method and device for preventing overdriven of power amplifier |
| CN101232313B (en) * | 2008-02-29 | 2011-11-30 | 中兴通讯股份有限公司 | Power controlling device and method for mobile communication system |
| CN102386952A (en) * | 2010-08-30 | 2012-03-21 | 中兴通讯股份有限公司 | Method for delaying diversity transmission and programmable logic device |
| WO2017185682A1 (en) * | 2016-04-29 | 2017-11-02 | 中兴通讯股份有限公司 | Distributed base station system |
| CN108496276A (en) * | 2016-01-26 | 2018-09-04 | 高通股份有限公司 | Use flexible printed circuit board（PCB）Signal delivering and antenna arrangement |
| CN112764017A (en) * | 2020-12-25 | 2021-05-07 | 南京天朗防务科技有限公司 | Method for generating orthogonal waveform and radar system |
Families Citing this family (1)
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| CN102973658B (en) * | 2012-12-17 | 2016-03-23 | 伊春金北药制药有限公司 | Sugarless type cough-relieving Qinbaohong mixture and method for making thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100384268C (en) * | 2003-07-26 | 2008-04-23 | 华为技术有限公司 | A transceiver singleboard |
| CN100376086C (en) * | 2004-08-16 | 2008-03-19 | 美国博通公司 | Method and system by digital baseband transmitter with digital rf/if support in gsm/gprs/edge compliant handsets |
| CN100459767C (en) * | 2005-05-27 | 2009-02-04 | 华为技术有限公司 | Method and device for preventing overdriven of power amplifier |
| CN101232313B (en) * | 2008-02-29 | 2011-11-30 | 中兴通讯股份有限公司 | Power controlling device and method for mobile communication system |
| CN102386952A (en) * | 2010-08-30 | 2012-03-21 | 中兴通讯股份有限公司 | Method for delaying diversity transmission and programmable logic device |
| CN108496276A (en) * | 2016-01-26 | 2018-09-04 | 高通股份有限公司 | Use flexible printed circuit board（PCB）Signal delivering and antenna arrangement |
| CN108496276B (en) * | 2016-01-26 | 2021-05-18 | 高通股份有限公司 | Signal delivery and antenna layout using flexible Printed Circuit Board (PCB) |
| WO2017185682A1 (en) * | 2016-04-29 | 2017-11-02 | 中兴通讯股份有限公司 | Distributed base station system |
| CN107343284A (en) * | 2016-04-29 | 2017-11-10 | 中兴通讯股份有限公司 | A kind of distributed base station system |
| CN107343284B (en) * | 2016-04-29 | 2022-06-07 | 中兴通讯股份有限公司 | Distributed base station system |
| CN112764017A (en) * | 2020-12-25 | 2021-05-07 | 南京天朗防务科技有限公司 | Method for generating orthogonal waveform and radar system |
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|---|---|
| CN1110155C (en) | 2003-05-28 |
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