CN107276701A - A kind of method, device and the Remote Radio Unit of sub-carrier power detection - Google Patents
A kind of method, device and the Remote Radio Unit of sub-carrier power detection Download PDFInfo
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- CN107276701A CN107276701A CN201610209179.0A CN201610209179A CN107276701A CN 107276701 A CN107276701 A CN 107276701A CN 201610209179 A CN201610209179 A CN 201610209179A CN 107276701 A CN107276701 A CN 107276701A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/336—Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
- H04B17/327—Received signal code power [RSCP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/52—TPC using AGC [Automatic Gain Control] circuits or amplifiers
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Abstract
The present invention provides a kind of method, device and the Remote Radio Unit of sub-carrier power detection, and this method includes the feedback data for receiving each sub-carrier, and calculates according to feedback data the load sharing wave power of each sub-carrier；According to the load sharing wave power of each sub-carrier and the load sharing power threshold of setting, the sub-carrier for needing to carry out Gain tuning is determined from each sub-carrier；The load sharing wave power of the sub-carrier of Gain tuning and the load sharing power threshold of setting are carried out as needed, it is determined that needing to carry out the error compensation value of the sub-carrier of Gain tuning；According to error compensation value to needing the sub-carrier for carrying out Gain tuning to carry out Gain tuning so that the load sharing wave power after Gain tuning and the error between the load sharing power threshold of setting are in default scope.By the above method, device and Remote Radio Unit, uneven problem in forward link band can be overcome, make the total emission power and each load sharing wave power of calibration more accurate.
Description
Technical field
The present invention relates to wireless communication field, particularly relate to a kind of method of sub-carrier power detection, device and
Remote Radio Unit.
Background technology
In wireless telecommunication system, forward emitting power determine before to coverage, the covering of usual forward direction
Scope is both limited by preceding to covering, is also limited by reverse coverage, for example：If forward direction covers
Lid scope is more than reverse coverage, and anti-coverage is inconsistent before causing, and is having the feelings of forward signal
Terminal can not access wireless telecommunication system under condition, in cellular communication system, if forward direction coverage is excessive,
It is overlapping with the covering of neighbor cell more than the forward direction coverage of needs, can be according to the interference into neighbor cell.
As can be seen that transmission power be in wireless telecommunication system it needs to be determined that an important indicator.
In addition, in multi-carrier radio communication system, the transmission power of each carrier wave needs unanimously, it is ensured that each
The coverage of individual carrier wave is consistent, so it is determined that, it is necessary to calibrate each carrier wave during forward emitting power
Power.
As shown in figure 1, in the detection method of existing carrier transmission power of multi-carrier radio communication system,
Each carrier wave by before handled to sender, successively including gain adjusting unit in forward link 101,
102nd ..., base band power detection unit 201,202 ..., upconversion process 301, power amplification 401,
Antenna is linked by duplexer filter 501；601 general power detection means.Wherein gain adjusting unit 101,
102nd ..., for the Gain tuning of the baseband signal of reception to be adjusted to the power of baseband signal；Base band work(
Rate detection unit 201,202 ..., the power for detecting baseband signal；Power detecting unit 601 is used
Total emission power in detection base station.In addition, as shown in Fig. 2 in existing multi-carrier power detection means
Control unit 701 is provided with structure, the control unit read respectively base band power detection unit 201,
201...... testing result, and the result that readout power detection unit 601 is detected to general power, according to base station
The baseband signal power of total emission power and each carrier wave calculates the transmission power per carrier wave, compares and calculates
Carrier wave transmission power and this carrier wave transmission power setting size of the difference, come control gain adjusting unit 101,
102nd ... Gain tuning is carried out.
Based on this, as shown in figure 3, existing multi-carrier power testing process is：
1. the transmitting work(according to the general power of Base Transmitter and each baseband signals power calculation per carrier wave
Rate；
2. each carrier wave of traversal judges whether its transmission power reaches this carrier power setting value, if reached,
Then terminate flow, otherwise perform step 3；
3. calculating the carrier gains for needing to adjust carrier wave, the gain of each carrier wave is adjusted；Then, step is returned
Rapid 1；
By existing detection method, it can accomplish that the transmission power of each carrier wave disclosure satisfy that in theory and want
Ask, but it has a premise, just assumes that in forward link gain band it is flat, to each carrier wave
Gain is consistent.Due to hardware and the discreteness of radio-frequency devices parameter, forward link gain often
It is difficult to accomplish flat gain, particularly power amplifier device, with it is interior it is flat meet certain requirement it is necessary to
Forward link is designed and device technology proposes higher requirement, design difficulty and equipment cost is added.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of method, device and the radio frequency of sub-carrier power detection
Extension unit, can overcome uneven problem in forward link band, make the total emission power and each load sharing of calibration
Wave power is more accurate.
In a first aspect, embodiments of the invention provide a kind of method of sub-carrier power detection, this method includes：
The feedback data of each sub-carrier is received, and calculates according to feedback data the sub-carrier of each sub-carrier
Power；
According to the load sharing wave power of each sub-carrier and the load sharing power threshold of setting, from each sub-carrier
It is determined that needing to carry out the sub-carrier of Gain tuning；The sub-carrier work(of the sub-carrier of Gain tuning is carried out as needed
Rate and the load sharing power threshold of setting, it is determined that needing to carry out the error compensation value of the sub-carrier of Gain tuning；
According to error compensation value to needing the sub-carrier for carrying out Gain tuning to carry out Gain tuning so that gain is adjusted
Load sharing wave power after whole and the error between the load sharing power threshold of setting are in default scope.
Wherein, the feedback data of each sub-carrier is received, and each sub-carrier is calculated according to feedback data
Load sharing wave power, including：
Receive the feedback data of each sub-carrier of feedback link feedback；
Feedback data is converted into power spectrum, according to the sub-carrier frequency point information of each sub-carrier in power spectrum
Correspondence position carries out power calculation, obtains the load sharing wave power of each sub-carrier.
Wherein, feedback data is converted into power spectrum, according to the sub-carrier frequency point information of each sub-carrier in power
Correspondence position in spectrum carries out power calculation, obtains the load sharing wave power of each sub-carrier, including：
Each feedback coefficient is calculated by Fast Fourier Transform (FFT) fft algorithm and spectrum power computational methods
According to power spectrum；
The numerically-controlled oscillator NCO of each sub-carrier position is obtained, shift frequency frequency is fed back, feeds back and adopt
Sample rate and sub-carrier bandwidth；
According to the NCO of each sub-carrier position, feedback shift frequency frequency, feedback sample rate and sub-carrier band
Width, calculates the load sharing wave power of each sub-carrier.
Wherein, the feedback data of each sub-carrier is received, and each sub-carrier is calculated according to feedback data
Load sharing wave power, including：
With feedback data and sub-carrier corresponding with feedback data NCO, feedback shift frequency frequency and feedback adopt
Sample rate, each sub-carrier that will be calculated by Frequency- shift moves on to 0 frequency；
Data after shift frequency are crossed into a low pass filter, put down to crossing the data progress time domain after low pass filter
The calculating of equal power, the gain to wave filter is compensated, and obtains the load sharing wave power of each sub-carrier, low
The pass band width of bandpass filter is the bandwidth of a sub-carrier.
Wherein, according to error compensation value to needing the sub-carrier for carrying out Gain tuning to carry out Gain tuning so that
Load sharing wave power after Gain tuning and the error between the load sharing power threshold of setting are in default scope
It is interior, including：
Error compensation value is sent to gain control module corresponding with needing the sub-carrier for carrying out Gain tuning,
So that gain control module carries out gain tune according to error compensation value to the sub-carrier for needing progress Gain tuning
It is whole so that the load sharing wave power after Gain tuning and the error between the load sharing power threshold of setting are default
In the range of.
Second aspect, embodiments of the invention provide a kind of device of sub-carrier power detection, and the device includes：
Computing module, the feedback data for receiving each sub-carrier, and each is calculated according to feedback data
The load sharing wave power of sub-carrier；
Determining module, for the load sharing wave power according to each sub-carrier and the load sharing power threshold of setting,
The sub-carrier for needing to carry out Gain tuning is determined from each sub-carrier；Point of Gain tuning is carried out as needed
The load sharing wave power of carrier wave and the load sharing power threshold of setting, it is determined that needing to carry out the sub-carrier of Gain tuning
Error compensation value；
Adjusting module, for carrying out gain tune to the sub-carrier for needing progress Gain tuning according to error compensation value
It is whole so that the load sharing wave power after Gain tuning and the error between the load sharing power threshold of setting are default
In the range of.
Wherein, computing module includes：
Receiving unit, the feedback data of each sub-carrier for receiving feedback link feedback；
First computing unit, for feedback data to be converted into power spectrum, according to the load sharing wave frequency of each sub-carrier
Correspondence position of the point information in power spectrum carries out power calculation, obtains the load sharing wave power of each sub-carrier.
Wherein, the first computing unit includes：
First computation subunit, for being calculated by Fast Fourier Transform (FFT) fft algorithm and spectrum power
Device calculates the power spectrum of each feedback data；
Obtain subelement, the position of the numerically-controlled oscillator NCO for obtaining each sub-carrier, feedback
Shift frequency frequency, feedback sample rate and sub-carrier bandwidth；
Second computation subunit, position for the NCO according to each sub-carrier, feedback shift frequency frequency,
Feedback sample rate and sub-carrier bandwidth, calculate the load sharing wave power of each sub-carrier.
Wherein, computing module includes：
Second computing unit, for feedback data and sub-carrier corresponding with feedback data NCO, anti-
Shift frequency frequency and feedback sample rate are presented, each sub-carrier that will be calculated by Frequency- shift moves on to 0 frequency；
3rd computing unit, for the data after shift frequency to be crossed into a low pass filter, to crossing low pass filter
Data afterwards carry out the calculating of time domain average power, and the gain to wave filter is compensated, and obtains each load sharing
The load sharing wave power of ripple, the pass band width of low pass filter is the bandwidth of a sub-carrier.
Wherein, adjusting module includes：
Adjustment unit, it is corresponding with needing the sub-carrier for carrying out Gain tuning for error compensation value to be sent to
Gain control module so that gain control module according to error compensation value to need carry out Gain tuning load sharing
Ripple carries out Gain tuning so that load sharing wave power after Gain tuning and between the load sharing power threshold of setting
Error in default scope.
The third aspect, embodiments of the invention provide a kind of Remote Radio Unit, and the Remote Radio Unit includes
The device of above-mentioned sub-carrier power detection.
The above-mentioned technical proposal of the present invention at least includes following beneficial effect：
Method, device and the Remote Radio Unit of sub-carrier power detection provided in an embodiment of the present invention, multiplexing
Existing feedback link, in software realize calculate and control linkage, it is not necessary to set in antenna port
General power measuring unit and forward link base band sub-carrier power measurement unit, therefore need not additionally increase and be
System hardware spending, reduces the design cost of system；Also, energy smaller to the pressure of link flatness
Enough general powers and load sharing wave power for truly reflecting output signal, the power error for gathering calculating is small, makes survey
The realtime power that the power calculated more truly reflects each sub-carrier of antenna port is measured, makes the work(of survey calculation
Rate more truly reflects the realtime power of each sub-carrier of antenna port.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will be described below to the embodiment of the present invention
In required for the accompanying drawing that uses be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, are not paying creative labor
Under the premise of, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 represents the forward link structure block diagram of existing wireless telecommunication system base station；
Fig. 2 represents existing multi-carrier power structure of the detecting device block diagram；
Fig. 3 represents existing multi-carrier power testing process block diagram；
Fig. 4 represents the FB(flow block) of the method for sub-carrier power detection provided in an embodiment of the present invention；
Fig. 5 represents the structured flowchart of the device of sub-carrier power detection provided in an embodiment of the present invention；
Fig. 6 represents the wireless telecommunication system base station forward link structured flowchart of a specific embodiment of the invention；
Fig. 7 represents the FB(flow block) of the method for the sub-carrier power detection of a specific embodiment of the invention.
Embodiment
To make the technical problem to be solved in the present invention, technical scheme and advantage clearer, below in conjunction with attached
Figure and specific embodiment are described in detail.
In multi-carrier radio communication base station system, baseband signal is exported according to configuration, is adjusted in numeric field gain
Entire signal passes through digital-to-analogue conversion, and signal goes to simulation and carries out up-conversion, power amplification to domain；Again by duplex
Filtering, antenna is launched；It is often DPD (Digital and base station is for linear requirements
Pre-Distortion, digital pre-distortion) Demand Design increases a feedback link, and the feedback link can carry out
Analog-to-digital conversion and digital sample.
The embodiment of the present invention provides a kind of method of sub-carrier power detection, the feedback link is multiplexed, in numeral
The output of domain collection power amplifier mouthful calculates each sub-carrier work(by the data signal of feedback link according to the data signal
Rate, the load sharing power threshold for then setting the load sharing wave power of calculating with forward direction base band is compared, right
Do load sharing wave power and the gain compensation of general power accordingly in difference portion, thus reach load sharing wave power and
General power output is consistent with the value of setting.Fig. 4 is referred to, it is illustrated that provided in an embodiment of the present invention point
The FB(flow block) of the method for carrier power detection.The side for the sub-carrier power detection that embodiments of the invention are provided
Method, may comprise steps of：
Step S11, receives the feedback data of each sub-carrier, and calculate each load sharing according to feedback data
The load sharing wave power of ripple；
Step S12, according to the load sharing wave power of each sub-carrier and the load sharing power threshold of setting, from each
The sub-carrier for needing to carry out Gain tuning is determined in individual sub-carrier；The sub-carrier of Gain tuning is carried out as needed
Load sharing wave power and setting load sharing power threshold, it is determined that need carry out Gain tuning sub-carrier mistake
Poor offset；
Step S13, according to error compensation value to needing the sub-carrier for carrying out Gain tuning to carry out Gain tuning,
So that the load sharing wave power after Gain tuning and the error between the load sharing power threshold of setting are default
In the range of.
Wherein it is possible to which the sub-carrier work(of each sub-carrier is calculated using frequency domain detection method according to feedback data
Rate.Now, in step S11, the feedback data of each sub-carrier is received, and calculate according to feedback data
The load sharing wave power of each sub-carrier, can include：
Receive the feedback data of each sub-carrier of feedback link feedback；
Here, it is multiplexed feedback link and receives the feedback data of each sub-carrier of feedback link feedback, this is anti-
Feedback data reflection be antenna port power live signal, the sub-carrier for each sub-carrier that calculating obtains can be made
Power more truly reflects the realtime power of each sub-carrier of antenna port.
Feedback data is converted into power spectrum, according to the sub-carrier frequency point information of each sub-carrier in power spectrum
Correspondence position carries out power calculation, obtains the load sharing wave power of each sub-carrier.
Specifically, above-mentioned be converted into power spectrum by feedback data, according to the sub-carrier frequency point information of each sub-carrier
Correspondence position in power spectrum carries out power calculation, obtains the load sharing wave power of each sub-carrier, can include：
Pass through FFT (Fast Fourier Transform, Fast Fourier Transform (FFT)) algorithms and spectrum power
Computational methods calculate the power spectrum of each feedback data.
Here it is possible to calculate the power spectrum of each feedback data using following principle formula：
Assuming that the feedback data that collection is received is x (n), the feedback data can be expressed as x (n)=xI(n)+
j*xQ(n), wherein xI(n) solid part signal, j*x are representedQ(n) imaginary signals are represented；
The FFT of N points is carried out to feedback data, the amplitude spectrum of feedback data is obtained, it is assumed that the amplitude
Compose as X (k), as shown in formula 1-1：
The power spectrum of feedback data is calculated according to the amplitude spectrum X (k), it is assumed that the power spectrum is P (k), such as formula
Shown in 1-2：
P (k)=X (k) * X*(k), k=0,1 ..., N-1 formulas 1-2
Obtain NCO (the Numerically Controlled Oscillator, digital control vibration of each sub-carrier
Device) position, feedback shift frequency frequency, feedback sample rate and sub-carrier bandwidth.
Here, suppose that the NCO of each sub-carrier is NCOi, feedback shift frequency frequency is MvFrq, and feedback is adopted
Sample rate is SampFrq, and sub-carrier band a width of BW, i represent that sub-carrier is identified.
According to the NCO of each sub-carrier position, feedback shift frequency frequency, feedback sample rate and sub-carrier band
Width, calculates the load sharing wave power of each sub-carrier.
Here it is possible to calculate the load sharing wave power of each sub-carrier using following principle formula：
First, after the FFT that N point length is done to feedback data, the length of obtained power spectrum is
N number of, it is FFT_SIZE that length is taken here, so can obtain the corresponding bandwidth that correspondence is each put
Bwpoint, as shown in formula 1-3：
Then, according to the sub-carrier bandwidth BW of sub-carrier, it is shared in the power spectrum that calculating obtains sub-carrier
Length, it is assumed here that the length that sub-carrier is accounted in power spectrum be Ni, as shown in formula 1-4：
Then, according to the NCO of sub-carrieriInformation obtains position of the sub-carrier center frequency point in amplitude spectrum,
Assuming that sub-carrier center frequency point is N0, as shown in formula 1-5：
After again, according to the spectra calculation starting point of sub-carrier, it is assumed that be NcoP (0), as shown in formula 1-6：
Finally, with reference to above-mentioned formula, the load sharing wave power value for obtaining each sub-carrier is calculated, it is assumed that frequency exists
Corresponding point is NcoP in power spectrumi(j), load sharing wave power value is CarrPowi, as shown in formula 1-7：
In addition it is also possible to which the sub-carrier of each sub-carrier is calculated using Time-Domain Detection Method according to feedback data
Power.Now, in step S11, the feedback data of each sub-carrier is received, and calculate according to feedback data
Go out the load sharing wave power of each sub-carrier, can include：
With feedback data and sub-carrier corresponding with feedback data NCO, feedback shift frequency frequency and feedback adopt
Sample rate, each sub-carrier that will be calculated by Frequency- shift moves on to 0 frequency；
Here, suppose that the feedback data that collection is received is x (n), the feedback data can be expressed as
X (n)=xI(n)+j*xQ(n), wherein xI(n) solid part signal, j*x are representedQ(n) imaginary signals are represented；
Assuming that the NCO of each sub-carrier is NCOi, i represents that sub-carrier is identified, and feedback shift frequency frequency is MvFrq,
Feedback sample rate is SampFrq.In above-mentioned steps, sub-carrier can be obtained using following principle formula and moved on to
Data after 0 frequency, as shown in formula 2-1：
Data after shift frequency are crossed into a low pass filter, put down to crossing the data progress time domain after low pass filter
The calculating of equal power, the gain to wave filter is compensated, and obtains the load sharing wave power of each sub-carrier, low
The pass band width of bandpass filter is the bandwidth of a sub-carrier.
Here it is possible to calculate the load sharing wave power of each sub-carrier using following principle formula：
Assuming that the data after shift frequency are xNCOi(n), low pass filter is h (n), the number crossed after low pass filter
According to for yi(n), wherein the pass band width of low pass filter is the bandwidth of sub-carrier, then calculation formula is such as
Shown in formula 2-2：
Power is averaging to crossing the data after low pass filter, the load sharing wave power of each sub-carrier is obtained, it is false
If load sharing wave power value is CarrPowi, as shown in formula 2-3：
Wherein, according to error compensation value to needing the sub-carrier for carrying out Gain tuning to carry out Gain tuning so that
Load sharing wave power after Gain tuning and the error between the load sharing power threshold of setting are in default scope
It is interior, including：
Error compensation value is sent to gain control module corresponding with needing the sub-carrier for carrying out Gain tuning,
So that gain control module carries out gain tune according to error compensation value to the sub-carrier for needing progress Gain tuning
It is whole so that the load sharing wave power after Gain tuning and the error between the load sharing power threshold of setting are default
In the range of.
In above-described embodiment, the method for sub-carrier power detection provided in an embodiment of the present invention has been multiplexed existing
Feedback link, by software realize calculate and control linkage, it is not necessary to antenna port set general power
Measuring unit and forward link base band sub-carrier power measurement unit, therefore need not additionally increase system hardware
Expense, reduces the design cost of system；Also, the antenna port returned data gathered by feedback link,
It is smaller to the pressure of link flatness because the power of feedback link is smaller, can truly it reflect defeated
Go out the general power and load sharing wave power of signal, the power error for gathering calculating is small, makes the power of survey calculation more
For the realtime power of each sub-carrier of true reflection antenna port.
Based on above method, the embodiment of the present invention additionally provides a kind of device to realize the above method, please
Referring to Fig. 5, it is illustrated that the structured flowchart of the device of sub-carrier power detection provided in an embodiment of the present invention.
The device of sub-carrier power detection provided in an embodiment of the present invention, can include：Computing module 21, determination
Module 22 and adjusting module 23.
Computing module 21, the feedback data for receiving each sub-carrier, and calculated according to feedback data
The load sharing wave power of each sub-carrier；
Determining module 22, for the load sharing wave power according to each sub-carrier and the sub-carrier power-threshold of setting
Value, determines the sub-carrier for needing to carry out Gain tuning from each sub-carrier；Gain tuning is carried out as needed
Sub-carrier load sharing wave power and setting load sharing power threshold, it is determined that need carry out Gain tuning point
The error compensation value of carrier wave；
Adjusting module 23, for being increased according to error compensation value to the sub-carrier for needing to carry out Gain tuning
Benefit adjustment so that the load sharing wave power after Gain tuning and the error between the load sharing power threshold of setting exist
In default scope.
Wherein, computing module 21 can include：Receiving unit and the first computing unit.
Receiving unit, the feedback data of each sub-carrier for receiving feedback link feedback；
First computing unit, for feedback data to be converted into power spectrum, according to the load sharing wave frequency of each sub-carrier
Correspondence position of the point information in power spectrum carries out power calculation, obtains the load sharing wave power of each sub-carrier.
Wherein, the first computing unit can include：First computation subunit, acquisition subelement and the second meter
Operator unit.
First computation subunit, for being calculated by Fast Fourier Transform (FFT) fft algorithm and spectrum power
Device calculates the power spectrum of each feedback data；
Obtain subelement, the position of the numerically-controlled oscillator NCO for obtaining each sub-carrier, feedback
Shift frequency frequency, feedback sample rate and sub-carrier bandwidth；
Second computation subunit, position for the NCO according to each sub-carrier, feedback shift frequency frequency,
Feedback sample rate and sub-carrier bandwidth, calculate the load sharing wave power of each sub-carrier.
In addition, computing module 21 can also include：Second computing unit and the 3rd computing unit.
Second computing unit, for feedback data and sub-carrier corresponding with feedback data NCO, anti-
Shift frequency frequency and feedback sample rate are presented, each sub-carrier that will be calculated by Frequency- shift moves on to 0 frequency；
3rd computing unit, for the data after shift frequency to be crossed into a low pass filter, to crossing low pass filter
Data afterwards carry out the calculating of time domain average power, and the gain to wave filter is compensated, and obtains each load sharing
The load sharing wave power of ripple, the pass band width of low pass filter is the bandwidth of a sub-carrier.
Wherein, adjusting module 23 can include：Adjustment unit.
Adjustment unit, it is corresponding with needing the sub-carrier for carrying out Gain tuning for error compensation value to be sent to
Gain control module so that gain control module according to error compensation value to need carry out Gain tuning load sharing
Ripple carries out Gain tuning so that load sharing wave power after Gain tuning and between the load sharing power threshold of setting
Error in default scope.
The device for the sub-carrier power detection that above-described embodiment is provided and sub-carrier provided in an embodiment of the present invention
The method of power detection belongs to same design, and it implements process and refers to embodiment of the method, to avoid repeating,
Here repeat no more.
In above-described embodiment, the device of sub-carrier power detection provided in an embodiment of the present invention has been multiplexed existing
Feedback link, by software realize calculate and control linkage, it is not necessary to antenna port set general power
Measuring unit and forward link base band sub-carrier power measurement unit, therefore need not additionally increase system hardware
Expense, reduces the design cost of system；Also, the antenna port returned data gathered by feedback link,
It is smaller to the pressure of link flatness because the power of feedback link is smaller, can truly it reflect defeated
Go out the general power and load sharing wave power of signal, the power error for gathering calculating is small, makes the power of survey calculation more
For the realtime power of each sub-carrier of true reflection antenna port.
Embodiments of the invention provide a kind of Remote Radio Unit, and the Remote Radio Unit includes above-mentioned sub-carrier
The device of power detection.
Because the device of the sub-carrier power detection described in any of the above-described kind has aforementioned techniques effect, therefore,
The Remote Radio Unit of device with the sub-carrier power detection should also possess corresponding technique effect, and it has
Body implementation process is similar to the above embodiments, does not repeat hereby.
The present invention is described in more detail by a specific embodiment again below.
Fig. 6 is referred to, it is illustrated that before the wireless telecommunication system base station that a specific embodiment of the invention is provided
To link structure block diagram, Fig. 6 reduces base band power detection unit 201,202...... relative to Fig. 1,
Power detecting unit 601 and control unit 701, one power calculation of increase and control unit 801.This hair
In the wireless telecommunication system base station forward link of bright specific embodiment, multiplexing feedback link and gain control module,
And increase by 801 points of a power calculation and control unit 801, the power calculation and control unit in numeric field
Not with feedback link and gain adjusting unit 101,102 ... be connected.The power calculation and control unit point
It is data sampling module, data power computing module and gain control respectively for following three functional module
Adjusting module, wherein, the data sampling module and data power computation module possess in foregoing invention embodiment
The function of the computing module 21 of the device of sub-carrier power detection；Gain control adjusting module includes this hair
The determining module 22 of the device of sub-carrier power detection and the function of adjusting module 23, are also wrapped in bright embodiment
Include the function of gain control module of the prior art.
Wherein, data sampling module is connected with feedback link, for reading the feedback coefficient in collection feedback link
According to；The feedback data that data power computing module is used to gather data sampling module passes through frequency domain detection method
Or Time-Domain Detection Method carries out sub-carrier power calculation；Gain control adjusting module respectively with Gain tuning list
Member 101,102 ... connection, for obtain each sub-carrier configuration load sharing power threshold, by data
Power computation module calculates obtained load sharing wave power and is compared with corresponding load sharing power threshold, it is determined that
Its error compensation value, and when the load sharing wave power that calculating is obtained is less than corresponding load sharing power threshold, and two
When error between person is not in default scope, the gain of the gain adjusting unit of increase correspondence sub-carrier,
Make the error between the load sharing wave power after Gain tuning and the load sharing power threshold of setting in default model
In enclosing；When the load sharing wave power that calculating is obtained is more than corresponding load sharing power threshold, and mistake between the two
When difference is not in default scope, reduces the gain of the gain adjusting unit of correspondence sub-carrier, make Gain tuning
The error between load sharing wave power and the load sharing power threshold of setting afterwards is in default scope.
With reference to Fig. 7, the flow of the method for the sub-carrier power detection of the specific embodiment of the invention is as follows：
Step S31, first transmitting baseband signal, signal magnitude are exported according to configuration requirement；
Step S32, the NCO of each sub-carrier signal is set and gives data power computing module；
Step S33, starts sub-carrier power calculation and control unit；
Step S34, data acquisition module carries out feedback data collection；
Step S35, the transmission power of sub-carrier is calculated with the feedback data of collection；
Step S36, travels through each sub-carrier, by the transmission power of calculating and the load sharing power threshold of setting
It is compared；If judging the error of the load sharing power threshold of transmission power and setting in default scope,
Then directly terminate.
Step S37, if interpretation difference is beyond default scope, determines error compensation value, and according to by mistake
Poor offset carries out gain compensation；Compensation skips to step 4 and initiates feedback data collection again after completing.Pass through
Return to step 4, to determine whether to confirm to calculate load sharing wave power and point of setting after the completion of compensation
Whether the error of carrier power threshold value is in default scope.
For foregoing embodiment of the method, in order to be briefly described, therefore it is all expressed as to a series of action group
Close, but those skilled in the art should know, the present invention is not limited by described sequence of movement,
Because according to the present invention, some steps can be carried out sequentially or simultaneously using other.Secondly, this area skill
Art personnel should also know that embodiment described in this description belongs to preferred embodiment, and involved is dynamic
Make not necessarily essential to the invention.
It should be noted that in inventive embodiments, such as first and second or the like relational terms are only
For an entity or operation and another entity or operate is made a distinction, and not necessarily require or secretly
Show between these entities or operation there is any this actual relation or order.
The unit illustrated as separating component can be or may not be it is physically separate, as
The part that unit is shown can be or may not be physical location, you can with positioned at a place, or
It can also be distributed on multiple NEs.It can select according to the actual needs therein some or all of
Unit realizes the purpose of this embodiment scheme.
In addition, each functional unit in each embodiment of the invention can be integrated in a processing unit,
Can also be that unit is individually physically present, can also two or more units be integrated in a unit
In.
If the function is realized using in the form of SFU software functional unit and as independent production marketing or used
When, it can be stored in a computer read/write memory medium.Understood based on such, skill of the invention
The part or the part of the technical scheme that art scheme substantially contributes to prior art in other words can be with
Embodied in the form of software product, the computer software product is stored in a storage medium, including
Some instructions are to cause a computer equipment (can be personal computer, server, or network are set
It is standby etc.) perform all or part of step of each embodiment methods described of the invention.And foregoing storage medium
Including：USB flash disk, mobile hard disk, ROM, RAM, magnetic disc or CD etc. are various can be with storage program generation
The medium of code.
Described above is the preferred embodiment of the present invention, it is noted that for the common skill of the art
For art personnel, on the premise of principle of the present invention is not departed from, some improvements and modifications can also be made,
These improvements and modifications also should be regarded as protection scope of the present invention.
Claims (11)
1. a kind of method of sub-carrier power detection, it is characterised in that methods described includes：
Receive the feedback data of each sub-carrier, and each sub-carrier according to being calculated the feedback data
Load sharing wave power；
According to the load sharing wave power of each sub-carrier with setting load sharing power threshold, from it is described each
The sub-carrier for needing to carry out Gain tuning is determined in sub-carrier；According to the load sharing for needing to carry out Gain tuning
The load sharing wave power of ripple and the load sharing power threshold of the setting, determine described to need to carry out Gain tuning
The error compensation value of sub-carrier；
Need the sub-carrier for carrying out Gain tuning to carry out Gain tuning to described according to the error compensation value, make
The error between the load sharing wave power after Gain tuning and the load sharing power threshold of the setting is obtained default
In the range of.
2. according to the method described in claim 1, it is characterised in that described to receive the anti-of each sub-carrier
Present data, and according to being calculated the feedback data each sub-carrier load sharing wave power, including：
Receive the feedback data of each sub-carrier of feedback link feedback；
The feedback data is converted into power spectrum, according to the sub-carrier frequency point information of each sub-carrier in power spectrum
In correspondence position carry out power calculation, obtain the load sharing wave power of each sub-carrier.
3. method according to claim 2, it is characterised in that described to convert the feedback data
For power spectrum, power meter is carried out according to correspondence position of the sub-carrier frequency point information of each sub-carrier in power spectrum
Calculate, obtain the load sharing wave power of each sub-carrier, including：
Calculated by Fast Fourier Transform (FFT) fft algorithm and spectrum power computational methods each described anti-
Present the power spectrum of data；
The numerically-controlled oscillator NCO of each sub-carrier position is obtained, shift frequency frequency is fed back, feeds back and adopt
Sample rate and sub-carrier bandwidth；
According to the NCO of each sub-carrier position, feedback shift frequency frequency, feedback sample rate and sub-carrier band
Width, calculates the load sharing wave power of each sub-carrier.
4. according to the method described in claim 1, it is characterised in that described to receive the anti-of each sub-carrier
Present data, and according to being calculated the feedback data each sub-carrier load sharing wave power, including：
With the NCO of the feedback data and sub-carrier corresponding with the feedback data, feedback shift frequency frequency
With feedback sample rate, each sub-carrier that will be calculated by Frequency- shift moves on to 0 frequency；
Data after shift frequency are crossed into a low pass filter, put down to crossing the data progress time domain after low pass filter
The calculating of equal power, the gain to wave filter is compensated, and obtains the load sharing wave power of each sub-carrier, institute
State bandwidth of the pass band width of low pass filter for a sub-carrier.
5. according to the method described in claim 1, it is characterised in that described according to the error compensation value
The sub-carrier for carrying out Gain tuning is needed to carry out Gain tuning to described so that the sub-carrier work(after Gain tuning
Error between rate and the load sharing power threshold of the setting in default scope, including：
The error compensation value is sent to and the corresponding gain of sub-carrier for needing to carry out Gain tuning
Control module, so that the gain control module needs to carry out gain tune according to the error compensation value to described
Whole sub-carrier carries out Gain tuning so that load sharing wave power and the sub-carrier of the setting after Gain tuning
Error between power threshold is in default scope.
6. a kind of device of sub-carrier power detection, it is characterised in that described device includes：
Computing module, the feedback data for receiving each sub-carrier, and calculated according to the feedback data
The load sharing wave power of each sub-carrier；
Determining module, for the load sharing wave power and the sub-carrier power-threshold of setting according to each sub-carrier
Value, determines the sub-carrier for needing to carry out Gain tuning from each described sub-carrier；Need to carry out according to described
The load sharing wave power of the sub-carrier of Gain tuning and the load sharing power threshold of the setting, determine the needs
Carry out the error compensation value of the sub-carrier of Gain tuning；
Adjusting module, for being entered according to the error compensation value to the sub-carrier for needing to carry out Gain tuning
Row Gain tuning so that load sharing wave power after Gain tuning and between the load sharing power threshold of the setting
Error in default scope.
7. device according to claim 6, it is characterised in that the computing module includes：
Receiving unit, the feedback data of each sub-carrier for receiving feedback link feedback；
First computing unit, for the feedback data to be converted into power spectrum, according to the load sharing of each sub-carrier
Correspondence position of the ripple frequency point information in power spectrum carries out power calculation, obtains the sub-carrier work(of each sub-carrier
Rate.
8. device according to claim 7, it is characterised in that first computing unit includes：
First computation subunit, for being calculated by Fast Fourier Transform (FFT) fft algorithm and spectrum power
Device calculates the power spectrum of each feedback data；
Obtain subelement, the position of the numerically-controlled oscillator NCO for obtaining each sub-carrier, feedback
Shift frequency frequency, feedback sample rate and sub-carrier bandwidth；
Second computation subunit, position for the NCO according to each sub-carrier, feedback shift frequency frequency,
Feedback sample rate and sub-carrier bandwidth, calculate the load sharing wave power of each sub-carrier.
9. device according to claim 6, it is characterised in that the computing module includes：
Second computing unit, for the feedback data and sub-carrier corresponding with the feedback data
NCO, feedback shift frequency frequency and feedback sample rate, each sub-carrier that will be calculated by Frequency- shift are moved
To 0 frequency；
3rd computing unit, for the data after shift frequency to be crossed into a low pass filter, to crossing low pass filter
Data afterwards carry out the calculating of time domain average power, and the gain to wave filter is compensated, and obtains each load sharing
The load sharing wave power of ripple, the pass band width of the low pass filter is the bandwidth of a sub-carrier.
10. device according to claim 6, it is characterised in that the adjusting module includes：
Adjustment unit, for the error compensation value to be sent to and the load sharing for needing to carry out Gain tuning
The corresponding gain control module of ripple so that the gain control module according to the error compensation value to the need
The sub-carrier for carrying out Gain tuning carries out Gain tuning so that load sharing wave power after Gain tuning with it is described
Error between the load sharing power threshold of setting is in default scope.
11. a kind of Remote Radio Unit, it is characterised in that the Remote Radio Unit includes such as claim
The device of sub-carrier power detection described in any one of 6-10.
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| CN201610209179.0A CN107276701B (en) | 2016-04-06 | 2016-04-06 | Method and device for detecting sub-carrier power and radio remote unit |
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| CN201610209179.0A CN107276701B (en) | 2016-04-06 | 2016-04-06 | Method and device for detecting sub-carrier power and radio remote unit |
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| CN107276701B (en) | 2020-11-03 |
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