CN1163097C - 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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- CN1163097C CN1163097C CNB011129891A CN01112989A CN1163097C CN 1163097 C CN1163097 C CN 1163097C CN B011129891 A CNB011129891 A CN B011129891A CN 01112989 A CN01112989 A CN 01112989A CN 1163097 C CN1163097 C CN 1163097C
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Abstract
The present invention provides a device and a method for controlling the open-loop power of a wide-band multi-carrier base station. The device comprises N digital up converters, a power control module, a digital-analogue converter, a filter and a digital control attenuator, wherein the power control module comprises an up-down slope power control data storage and a data processing and address generating unit, the power control module separates a dynamic power grade control signal of each carrier frequency and provides the dynamic power grade control signal of each carrier frequency for each digital up converter, and the power control module also reads up-down slope power control data and outputs the data to the digital control attenuator for controlling the power. The present invention also provides the method for controlling the open-loop power.
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:
Several digital up converter, each digital up converter receive a roadbed band signal;
Power control module, it has power control data and carrier frequency information input, is used for received power control data and carrier frequency information; Described power control module comprises:
Climb and fall power control data memory is used to store climb and fall power control data;
Data processing and address-generation unit, receive described power control data and carrier frequency information, isolate the dynamic power grade control signal of each carrier frequency from described power control data and carrier frequency information, offer each described digital up converter, described several digital up converter carry out the control of dynamic power grade respectively according to described dynamic power grade control signal to described baseband signal; Described data processing and address-generation unit also read the address of climb and fall power control data according to the time slot clock generating in the time-division multiple address system, and read climb and fall power control data and output according to this address from described climb and fall power control data memory;
Adder links to each other with described several digital up converter, receives the output signal through dynamic power control of described several upconverter outputs, with these output signal additions;
The digital multiplication unit, receive respectively from the described climb and fall power control data of described climb and fall power control data memory output and the output of described adder and output signal, and, carry out the control of climb and fall power with this two signal multiplication, output is through the output signal of climb and fall power control;
Digital to analog converter links to each other with described power control module, and the signal that described power control module is exported carries out digital-to-analogue conversion;
The symbol transition unit; Link to each other with described digital multiplication unit, convert described output signal to be complementary data format with digital to analog converter through the control of climb and fall power; 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 links to each other with described power control module with described filter, and according to the rate of static power control signal of described power control module, 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;
From power control data and carrier frequency information, isolate the dynamic power grade control signal and the rate of static power control signal of each carrier frequency;
Dynamic power grade control signal according to described each carrier frequency is carried out the control of dynamic power grade to each baseband signal, and output is through the output signal of dynamic power grade control;
With described output signal addition through dynamic power grade control, obtain behind the multi-transceiver combination and output signal;
Read the address of climb and fall power control data according to the time slot clock generating in the time-division multiple address system;
Obtain climb and fall power control data according to this address;
Multiply each other with output signal and described climb and fall power control data described, carry out the control of climb and fall power, output is through the output signal of climb and fall power control;
Described output signal through the control of climb and fall power is carried 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, the control of the dynamic power of each carrier wave is separate, can change the transmitting power of the arbitrary time slot of any carrier wave flexibly and easily;
3, each carrier wave all shared climb and fall curve when the different capacity grade, it is controlled at numeric field and finishes;
4, before multichannel is synthetic, each carrier wave is only in the direct switching of protecting bit power controlling grade in the time.
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;
Fig. 3 is the structured flowchart of the power control module among Fig. 2.
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 several baseband signals 201,202 ..., 20N, correspondingly, for handle these baseband signals 201,202 ..., 20N, open-looped power control device include several digital up converter 301,302 ..., 30N, each digital up converter 301,302 ..., 30N can realize the function to the control of the Digital Up Convert of baseband signal and dynamic power grade.Power control module 40 is modules of output dynamic power ranking score carrier frequency control signal and rate of static power control, simultaneously, the climb and fall power control of multi-carrier signal is also finished in power control module 40.
The structure of power control module 40 as shown in Figure 3, it comprises data processing and address-generation unit 401, climb and fall power control data memory 402, adder 403, digital multiplication unit 404 and symbol transition unit 405.Data processing and address-generation 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 and address-generation unit 401 are 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 upconverter 301,302 ..., 30N, 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 70, carry out rate of static power control.
Each digital up converter 301,302 ..., carry out the control of dynamic power grade among the 30N and generally only carry out simple switching between power grade, then, each digital up converter 301,302 ..., 30N will be input to through the output signal of dynamic power grade control in the adder 403 in the power control module 40, carry out addition, obtain and output signal.
Stored climb and fall power control data in the climb and fall power control data memory 402 in the power control module 40, this power control data is a climb and fall power control curve, and these data are used for adder 403 carried out the control of climb and fall power with output signal.Data processing in the power control module 40 and address-generation unit 401 read the needed address of climb and fall control data according to the time slot clock generating in the time-division multiple address system, then, from climb and fall power control data memory 402, select climb and fall power control data, offer digital multiplication unit 404.Simultaneously adder 403 also offer digital multiplication unit 404 with output signal, in digital multiplication unit 404, with climb and fall power control data with and output signal multiply each other, to carry out the control of climb and fall power.What digital multiplication unit 404 was exported is the output signal of controlling through climb and fall power.The effect of symbol transition unit 405 is that the output signal of digital multiplication unit 404 is carried out format conversion, converts the data format that is complementary with digital to analog converter to.Offer follow-up digital to analog converter (DAC) 50 then, carry out digital-to-analogue conversion and filtering (in filter 60, carrying out).
As mentioned above, in the present embodiment, the control of climb and fall power is what to realize by the digital multiplication unit 404 in the power control module 40.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 70, 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 power control module 40 provides, and the multi-carrier signal that filter 70 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;
From power control data and carrier frequency information, isolate the dynamic power grade control signal of each carrier frequency;
Dynamic power grade control signal according to each carrier frequency is carried out the control of dynamic power grade to each baseband signal, and output is through the output signal of dynamic power grade control;
Will be through the output signal addition of dynamic power grade control, obtain behind the multi-transceiver combination and output signal;
Read the address of climb and fall power control data according to the time slot clock generating in the time-division multiple address system;
Obtain climb and fall power control data according to this address;
To multiply each other with output signal and climb and fall power control data, and carry out the control of climb and fall power, output is through the output signal of climb and fall power control;
To convert the data format that is complementary with digital to analog converter to through the output signal of climb and fall power control, conversion of the line number of going forward side by side mould and filtering;
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 (8)
1, a kind of open-looped power control device of broadband multi-carrier base station comprises:
Several digital up converter, each digital up converter receive a roadbed band signal;
Power control module, it has power control data and carrier frequency information input, is used for received power control data and carrier frequency information; Described power control module comprises:
Climb and fall power control data memory is used to store climb and fall power control data;
Data processing and address-generation unit, receive described power control data and carrier frequency information, isolate the dynamic power grade control signal of each carrier frequency from described power control data and carrier frequency information, offer each described digital up converter, described several digital up converter carry out the control of dynamic power grade respectively according to described dynamic power grade control signal to described baseband signal; Described data processing and address-generation unit also read the address of climb and fall power control data according to the time slot clock generating in the time-division multiple address system, and read climb and fall power control data and output according to this address from described climb and fall power control data memory;
Adder links to each other with described several digital up converter, receives the output signal through dynamic power control of described several upconverter outputs, with these output signal additions;
The digital multiplication unit, receive respectively from the described climb and fall power control data of described climb and fall power control data memory output and the output of described adder and output signal, and, carry out the control of climb and fall power with this two signal multiplication, output is through the output signal of climb and fall power control;
Digital to analog converter links to each other with described power control module, and the signal that described power control module is exported carries out digital-to-analogue conversion;
The symbol transition unit; Link to each other with described digital multiplication unit, convert described output signal to be complementary data format with digital to analog converter through the control of climb and fall power; 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 links to each other with described power control module with described filter, and according to the rate of static power control signal of described power control module, 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 memory is the memory of storage climb and fall power control curve.
3, the open-looped power control device of broadband multi-carrier base station as claimed in claim 1, it is characterized in that described several digital up converter that according to described dynamic power grade control signal described baseband signal carried out the control of dynamic power grade respectively are the digital up converter that carry out the switching between power grade.
4, the open-looped power control device of broadband multi-carrier base station as claimed in claim 1 or 2, it is characterized in that described climb and fall power control data memory is to have stored the memory that carries out the climb and fall power control data of pre-distortion in advance according to the distortion program of broadband emission passage.
5, 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;
From power control data and carrier frequency information, isolate the dynamic power grade control signal and the rate of static power control signal of each carrier frequency;
Dynamic power grade control signal according to described each carrier frequency is carried out the control of dynamic power grade to each baseband signal, and output is through the output signal of dynamic power grade control;
With described output signal addition through dynamic power grade control, obtain behind the multi-transceiver combination and output signal;
Read the address of climb and fall power control data according to the time slot clock generating in the time-division multiple address system;
Obtain climb and fall power control data according to this address;
Multiply each other with output signal and described climb and fall power control data described, carry out the control of climb and fall power, output is through the output signal of climb and fall power control;
Described output signal through the control of climb and fall power is carried 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 5 described broadband multi-carrier base stations, it is characterized in that 6, described climb and fall power control data is climb and fall power control curve data.
7, the open-loop power control method of broadband multi-carrier base station as claimed in claim 5 is characterized in that, described dynamic power grade is controlled to be the switching between power grade.
As the open-loop power control method of claim 5 or 6 described broadband multi-carrier base stations, it is characterized in that 8, described climb and fall power control data has been carried out pre-distortion by the distortion level according to the broadband emission passage in advance.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011129891A CN1163097C (en) | 2001-05-25 | 2001-05-25 | Open-looped power control device and method for wide-band multicarrier base station |
| US10/469,192 US7336726B2 (en) | 2001-02-27 | 2001-10-26 | Apparatus and method for power control in digital mobile communication system broadband multi-carrier base station |
| EP01274209A EP1365606A4 (en) | 2001-02-27 | 2001-10-26 | The apparatus and method for power control in digital mobile communication system broadband multi-carrier base station |
| PCT/CN2001/001508 WO2002091770A1 (en) | 2001-02-27 | 2001-10-26 | The apparatus and method for power control in digital mobile communication system broadband multi-carrier base station |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB011129891A CN1163097C (en) | 2001-05-25 | 2001-05-25 | Open-looped power control device and method for wide-band multicarrier base station |
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| Publication Number | Publication Date |
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| CN1388721A CN1388721A (en) | 2003-01-01 |
| CN1163097C true CN1163097C (en) | 2004-08-18 |
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| CNB011129891A Expired - Fee Related CN1163097C (en) | 2001-02-27 | 2001-05-25 | Open-looped power control device and method for wide-band multicarrier base station |
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| CN1901393A (en) * | 2006-07-26 | 2007-01-24 | 华为技术有限公司 | System and method for regulating far end radio frequency unit power and far end radio frequency unit |
| CN101170331B (en) * | 2007-11-13 | 2011-05-25 | 中兴通讯股份有限公司 | Marking method and device for carrier transmission power of multi-carrier radio communication system |
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Granted publication date: 20040818 Termination date: 20200525 |