CN1388720A - Open-looped power control device and method for wide-band multicarrier base station - Google Patents
Open-looped power control device and method for wide-band multicarrier base station Download PDFInfo
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- CN1388720A CN1388720A CN 01112988 CN01112988A CN1388720A CN 1388720 A CN1388720 A CN 1388720A CN 01112988 CN01112988 CN 01112988 CN 01112988 A CN01112988 A CN 01112988A CN 1388720 A CN1388720 A CN 1388720A
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Abstract
The present invention is open-looped power control device and method for wide-band multicarrier base station. The device incldues N digital up frequency converters, control data generator, N digital multipliers, adder, D/A converter, filter and digitally controlled attenuator. Its control data generator includes data processing unit to separate dynamic power level control signal and static power control signal of various carrier frequencies from the power controlling data and carrier frequency information; and address generating unit to read and output upslope and downgrade power controlling data, and these control signals are provided to the multipliers and the digitally controlled attenuator for open-looped power control.
Description
The present invention relates to output control device and control method thereof in the digital mobile communication system, relate in particular to the open-looped power control device and the control method thereof of broad band multicarrier GSM base station.
GSM is the present the highest a kind of digital cellular mobile communication systems of occupation rate of market in the world.In gsm system, in order to improve power system capacity, one of its effective measures are the utilances that improves frequency spectrum, and the concrete manifestation form is to reduce the interference of interchannel.Reduce the method for disturbing at present and mainly contain 3 kinds: automated power control, frequency hopping and discontinuous emission (DTX).Discontinuous emission is actually to control by power and realizes that this shows, the power control of GSM is significant for increasing power system capacity and improving channel quality.
The basic principle of automated power control is: when not needing maximum transmission power just can reach the situation of good transmission quality, system self-adaption ground reduces the transmitting power of transmitter.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.
The general closed power control technology that adopts as shown in Figure 1 in traditional GSM base station, arrowband.It carries out power control separately at each carrier wave.Control procedure is: detector 105 detects the forward power that obtains power amplifier output and detects voltage, then this power detection voltage and the template curve 106 that obtains in advance according to certain algorithm are realized subtraction at adder 104 places, its difference removes to control voltage-controlled attenuator 101 in the transmission channel by integrator 103 again, changes the transmitting power of signal.If carve the known template voltage 106 that detected power voltage is lower than at a time, then integrator 103 output voltages rise, and attenuator 101 attenuations reduce, and power output increases, and impel forward power to detect voltage and promote; When detection voltage was higher than template voltage 106, integrator 103 output voltages descended, and attenuator 101 attenuations increase, and the final power output of power amplifier descends, and caused the detector output voltage to descend.
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 problem that broad band multicarrier GSM base station must solve.Because wide bandwidth base station has very big difference with traditional architecture of base station, traditional single carrier Poewr control method is difficult to be useful in the wide bandwidth base station, does not see the related data that relevant GSM multi-carrier power is controlled at present at home and abroad as yet.
Multi-carrier signal is the synthetic of each single-carrier signal.Since the changeability of the frequency of each carrier wave and power and multicarrier composite signal envelope be difficult to predictability, be difficult to detect the power envelope of each carrier frequency, and the power envelope that detects each carrier wave in real time is the precondition that realizes the power closed-loop control by simple method.Therefore the closed power control difficulty that realizes multi-carrier signal is bigger.
Therefore, the object of the present invention is to provide a kind of open-looped power control device based on the wide band GSM base station, it can preferably solve the automated power control of broadband multi-carrier base station.
Simultaneously, another object of the present invention is to provide a kind of open-loop power control method based on the wide band GSM base station, utilizes above-mentioned control device to solve the automated power control of broadband multi-carrier base station.
Open Loop Power control scheme based on the wide band GSM base station of the present invention is to utilize the multicarrier passage of posting a letter to have this inherent characteristic of superlinearity characteristic, can make a plurality of carrier waves finish power control simultaneously, and can satisfy the requirement of GSM power control simultaneously time domain and frequency domain template.Poewr control method provided by the invention in addition makes the power control of each carrier wave separate, can change the transmitting power of the arbitrary time slot of any carrier wave flexibly and easily.
According to above-mentioned purpose of the present invention, the open-looped power control device of broadband multi-carrier base station provided by the invention comprises:
N digital up converter, each digital up converter receive a roadbed band signal, and this baseband signal is carried out up-conversion;
The control data generation unit, it has power control data and carrier frequency information input, is used for received power control data and carrier frequency information; Described control data generation unit comprises:
Data processing unit receives described power control data and carrier frequency information, isolates the dynamic power grade control signal and the static power control signal of each carrier frequency from described power control data and carrier frequency information;
Address-generation unit produces the address of reading climb and fall power control data according to the time slot clock, and reads climb and fall power control data and output according to this address from described climb and fall power control data memory;
N digital multiplier, link to each other with described control data generation unit with a described N digital up converter respectively, the dynamic power grade control signal of each carrier frequency of the described data processing unit output in the CF signal of described N digital up converter output and the described control data generation unit and the climb and fall power control data of described climb and fall power control data memory output are multiplied each other the signal that output is controlled through the control of dynamic power grade and climb and fall power;
Adder links to each other with a described N digital multiplier, and the output signal of a described N digital multiplier is carried out addition, obtains multi-carrier signal;
Digital to analog converter links to each other with described adder, and the multi-carrier signal that described adder is exported carries out digital-to-analogue conversion;
Filter links to each other with described digital to analog converter, and the signal of logarithmic mode transducer output carries out filtering;
And numerical-control attenuator, link to each other with described control data generation unit with described filter, according to the rate of static power control signal of described control data generation unit, the signal that described filter is exported carries out static power control.
According to another object of the present invention, the present invention also provides a kind of open-loop power control method of broadband multi-carrier base station, is used for multi-carrier signal is carried out power control, comprises the following step:
Receive each roadbed band signal and power control data and carrier frequency information;
Each roadbed band signal is carried out Digital Up Convert respectively;
From power control data and carrier frequency information, isolate the dynamic power grade control signal of each carrier frequency;
Produce the address of reading climb and fall power control data according to the time slot clock;
Obtain climb and fall power control data according to this address;
Each is multiplied each other the output signal that output is controlled through the control of dynamic power grade and climb and fall power through the signal of Digital Up Convert and described dynamic power grade control signal and described climb and fall power control data;
With the described output signal addition of controlling through dynamic power grade control and climb and fall power, obtain signal behind the multi-transceiver combination;
With described behind the multi-transceiver combination that dynamic power grade control and climb and fall power are controlled signal carry out digital-to-analogue conversion and filtering;
According to isolated rate of static power control signal from described power control data and carrier frequency information described output signal through filtering is carried out rate of static power control.
As mentioned above, because Poewr control method of the present invention utilizes the favorable linearity of broadband sender, power grade control is separated with the control of climb and fall power, simultaneously rate of static power control being placed on radio frequency part carries out, dynamic power grade control is placed in the numeric field carries out, therefore, if any following advantage:
1, the power control of a plurality of carrier waves can be finished simultaneously, and the time domain of agreement regulation and the requirement of frequency domain template can be satisfied simultaneously;
2, control of the dynamic power of each carrier wave and climb and fall control are separate, can change the transmitting power of the arbitrary time slot of any carrier wave flexibly and easily;
3, each carrier wave is at the corresponding different climb and fall power control curve of different capacity grade, and it is controlled at numeric field and finishes;
4, the different corresponding different climb and fall power of dynamic power grade are controlled curve, climb and fall curve smoothing transition when power grade switches.
With reference to the accompanying drawings and in conjunction with the embodiments, describe embodiments of the invention in detail, in the accompanying drawing:
Fig. 1 is the theory diagram of traditional single carrier GSM base station closed power control;
Fig. 2 is the structured flowchart of the open-looped power control device of Multi-Carrier basestation of the present invention.
As shown in Figure 2, multi-carrier signal can by a plurality of baseband signals through up-conversion then addition form.In Fig. 2, have N baseband signal 201,202 ..., 20N, correspondingly, for handle these baseband signals 201,202 ..., 20N, open-looped power control device include N digital up converter 301,302 ..., 30N, each digital up converter 301,302 ..., 30N can realize the function to the Digital Up Convert of baseband signal.Control data generation unit 40 is unit of output dynamic power ranking score carrier frequency control signal, rate of static power control and climb and fall power control signal.
Control data generation unit 40 comprises data processing unit 401, address-generation unit 402 and climb and fall power control data memory 403.Data processing unit 401 received power control data and carrier frequency information.The dynamic power grade control signal and the rate of static power control signal that in power control data and carrier frequency information, have comprised each carrier frequency.Data processing unit 401 is separated the dynamic power grade control signal and the rate of static power control signal of each carrier frequency of comprising in power control data and the carrier frequency information, with the dynamic power grade control signal of each carrier frequency offer respectively corresponding digital multiplier 501,502 ..., 50N, carry out dynamic power grade control; The rate of static power control signal is offered numerical-control attenuator DCA in the multi-carrier broadband sender 90, carry out rate of static power control.
Stored climb and fall power control data in the climb and fall power control data memory 403 in the control data generation unit 40, this power control data is a climb and fall power control curve, and these data are used for the control of climb and fall power.Address-generation unit 402 in the control data generation unit 40 produces according to the time slot clock and reads the needed address of climb and fall control data, then, from climb and fall power control data memory 403, select climb and fall power control data, offer digital multiplier 501,502 ... 50N, digital multiplier 501,502 ..., among the 50N, carry out the control of climb and fall power.Digital multiplication unit 501,502 ..., 50N the dynamic power grade control signal and the climb and fall power control data that will provide through the CF signal and the control data generation unit 40 of up-conversion multiply each other, and produces the signal of controlling through the control of dynamic power grade and climb and fall power.Then, in adder 60,, obtain multi-carrier signal with these signal plus through control of dynamic power grade and the control of climb and fall power.Offer follow-up digital to analog converter (DAC) 70 then, carry out digital-to-analogue conversion and filtering (in filter 80, carrying out).
As mentioned above, in the present embodiment, climb and fall power control be by digital multiplier 501,502 ..., 50N realizes.The digital multiplication unit is not owing to exist nonlinear problem, and therefore, control accuracy greatly improves, but also can reduce the linear requirement to the broadband emission passage by the method for in advance the climb and fall curve being carried out pre-distortion.That is to say that can be in advance logical according to broadband emission distortion level carries out pre-distortion to power control data up and down, with the distortion of compensating wide band transmission channel.
As shown in Figure 2, in broadband sender 90, include a numerical-control attenuator DCA, this numerical-control attenuator DCA can be under the control of the rate of static power control signal that control data generation unit 40 provides, and the multi-carrier signal that filter 80 is exported carries out rate of static power control.
More than describe the open-looped power control device of broadband multi-carrier base station of the present invention in detail, also comprised the open-loop power control method of broadband multi-carrier base station in the superincumbent description, now this method is summarized as follows:
Open-loop power control method comprises the following step:
Receive each roadbed band signal and power control data and carrier frequency information;
Each roadbed band signal is carried out Digital Up Convert respectively;
From power control data and carrier frequency information, isolate the dynamic power grade control signal of each carrier frequency;
Produce the address of reading climb and fall power control data according to the time slot clock;
Obtain climb and fall power control data according to this address;
Each is multiplied each other the output signal that output is controlled through the control of dynamic power grade and climb and fall power through the signal of Digital Up Convert and dynamic power grade control signal and climb and fall power control data;
To obtain multi-carrier signal through the output signal addition of control of dynamic power grade and the control of climb and fall power;
To carry out digital-to-analogue conversion and filtering through the multi-carrier signal of control of dynamic power grade and the control of climb and fall power;
Control carry out rate of static power through the output signal of filtering according to isolated rate of static power control signal from power control data and carrier frequency information.
Claims (6)
1, the open-looped power control device of broadband multi-carrier base station provided by the invention comprises:
N digital up converter, each digital up converter receive a roadbed band signal, and this baseband signal is carried out up-conversion;
The control data generation unit, it has power control data and carrier frequency information input, is used for received power control data and carrier frequency information; Described control data generation unit comprises:
Data processing unit receives described power control data and carrier frequency information, isolates the dynamic power grade control signal and the static power control signal of each carrier frequency from described power control data and carrier frequency information;
Address-generation unit produces the address of reading climb and fall power control data according to the time slot clock, and reads climb and fall power control data and output according to this address from described climb and fall power control data memory;
N digital multiplier, link to each other with described control data generation unit with a described N digital up converter respectively, the dynamic power grade control signal of each carrier frequency of the described data processing unit output in the CF signal of described N digital up converter output and the described control data generation unit and the climb and fall power control data of described climb and fall power control data memory output are multiplied each other the signal that output is controlled through the control of dynamic power grade and climb and fall power;
Adder links to each other with a described N digital multiplier, and the output signal of a described N digital multiplier is carried out addition, obtains multi-carrier signal;
Digital to analog converter links to each other with described adder, and the multi-carrier signal that described adder is exported carries out digital-to-analogue conversion;
Filter links to each other with described digital to analog converter, and the signal of logarithmic mode transducer output carries out filtering;
And numerical-control attenuator, link to each other with described control data generation unit with described filter, according to the rate of static power control signal of described control data generation unit, the signal that described filter is exported carries out static power control.
2, the open-looped power control device of broadband multi-carrier base station as claimed in claim 1 is characterized in that, described climb and fall power control data is climb and fall power control curve.
3, the open-looped power control device of broadband multi-carrier base station as claimed in claim 1 or 2 is characterized in that, described climb and fall power control data is to have carried out pre-distortion according to the distortion program of broadband emission passage in advance.
4, a kind of open-loop power control method of broadband multi-carrier base station is used for multi-carrier signal is carried out power control, comprises the following step:
Receive each roadbed band signal and power control data and carrier frequency information;
Each roadbed band signal is carried out Digital Up Convert respectively;
From power control data and carrier frequency information, isolate the dynamic power grade control signal of each carrier frequency;
Produce the address of reading climb and fall power control data according to the time slot clock;
Obtain climb and fall power control data according to this address;
Each is multiplied each other the output signal that output is controlled through the control of dynamic power grade and climb and fall power through the signal of Digital Up Convert and described dynamic power grade control signal and described climb and fall power control data;
With the described output signal addition of controlling through dynamic power grade control and climb and fall power, obtain signal behind the multi-transceiver combination;
With described behind the multi-transceiver combination that dynamic power grade control and climb and fall power are controlled signal carry out digital-to-analogue conversion and filtering;
According to isolated rate of static power control signal from described power control data and carrier frequency information described output signal through filtering is carried out rate of static power control.
As the open-loop power control method of right 4 described broadband multi-carrier base stations, it is characterized in that 5, described climb and fall power control data is climb and fall power control curve.
As the open-loop power control method of claim 4 or 5 described broadband multi-carrier base stations, it is characterized in that 6, described climb and fall power control data is to have carried out pre-distortion according to the distortion level of broadband emission passage in advance.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011129883A CN1138432C (en) | 2001-05-25 | 2001-05-25 | Open-looped power control device and method for wide-band multicarrier base station |
| DE60142411T DE60142411D1 (en) | 2001-02-27 | 2001-10-26 | Method and apparatus for multi-carrier power control of a base station in a digital broadband mobile communication system |
| EP01273902A EP1365602B1 (en) | 2001-02-27 | 2001-10-26 | Method and apparatus of multi-carrier power control of base station in broad-band digital mobile communication system |
| AT01273902T ATE471618T1 (en) | 2001-02-27 | 2001-10-26 | METHOD AND DEVICE FOR MULTI CARRIER POWER CONTROL OF A BASE STATION IN A DIGITAL BROADBAND MOBILE COMMUNICATIONS SYSTEM |
| PCT/CN2001/001509 WO2002071771A1 (en) | 2001-02-27 | 2001-10-26 | Method and apparatus of multi-carrier power control of base station in broad-band digital mobile communication system |
| US10/469,111 US7062289B2 (en) | 2001-02-27 | 2001-10-26 | Method and apparatus of multi-carrier power control of base station in broad-band digital mobile communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011129883A CN1138432C (en) | 2001-05-25 | 2001-05-25 | Open-looped power control device and method for wide-band multicarrier base station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1388720A true CN1388720A (en) | 2003-01-01 |
| CN1138432C CN1138432C (en) | 2004-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB011129883A Expired - Fee Related CN1138432C (en) | 2001-02-27 | 2001-05-25 | Open-looped power control device and method for wide-band multicarrier base station |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101496312B (en) * | 2006-07-28 | 2012-11-21 | 京瓷株式会社 | Wireless communication method and wireless base station |
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- 2001-05-25 CN CNB011129883A patent/CN1138432C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101496312B (en) * | 2006-07-28 | 2012-11-21 | 京瓷株式会社 | Wireless communication method and wireless base station |
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| CN1138432C (en) | 2004-02-11 |
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Granted publication date: 20040211 Termination date: 20170525 |