CN106571879A - Power detection method and device - Google Patents
Power detection method and device Download PDFInfo
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- CN106571879A CN106571879A CN201510658652.9A CN201510658652A CN106571879A CN 106571879 A CN106571879 A CN 106571879A CN 201510658652 A CN201510658652 A CN 201510658652A CN 106571879 A CN106571879 A CN 106571879A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/11—Monitoring; Testing of transmitters for calibration
- H04B17/13—Monitoring; Testing of transmitters for calibration of power amplifiers, e.g. gain or non-linearity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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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
- H04W52/06—TPC algorithms
- H04W52/10—Open loop power control
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- Computer Networks & Wireless Communication (AREA)
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- Nonlinear Science (AREA)
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- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a power detection method and device and relates to the field of mobile communication. The method comprises the follow steps: a transmitting chain sending calibration data by utilizing a guard period GP time slot between transmit-receive time slots; calibrating transmitting chain gain into a target gain by utilizing a detection result of the calibration data; detecting transmitting power of business data sent by the transmitting chain; and determining real-time forward power by utilizing the transmitting chain gain, which has been calibrated into the target gain, and the transmitting power of the business data. The power detection method and device can accurately carry out power detection and calculation when a wireless base station sends a small-power signal.
Description
Technical field
The present invention relates to mobile communication technology field, more particularly to a kind of power detecting method and device.
Background technology
In the current mobile communication systems, whether by Base Band Unit (Base band Unit, BBU) and penetrate
The distributed base station of frequency extension unit (Radio Remote Unit, RRU) composition, or BBU and RRU
The integrated integrated micro-base station for being formed together, the basic function of transmitting chain includes：Baseband signal passes through base band number
Digital intermediate frequency unit is sent to after word processing, then simulation letter is converted digital signals into through digital to analog converter
Number, then signal is moved into radio frequency band through radio frequency processing, through appropriate amplification and filtering, by antenna
It is sent to terminal.The basic function of detection link includes：The signal of transmitting terminal is sampled, and sampling is believed
Number intermediate frequency is mixed to, then analogue signal is transformed to by digital signal by analog-digital converter, carry out a series of numerals
After IF process, realtime power detection and voltage standing wave ratio (the Voltage Standing Wave of link is realized
Ratio, VSWR) calculate.
In traditional communication system, the power detection of base station includes forward power detection and backward power detection.Before
To power detection it is sampled in antenna opening to sampling unit by front, is then given by forward detection link
Digital signal processing unit, using known forward detection link gain, is calculated actual forward power,
Wherein, the forward power can be used to power calibration so that forward power is equal to anticipating power, while
Can be used to calculate VSWR.Backward power detection is sampled in antenna opening by reverse sampling unit, so
Afterwards digital signal processing unit is sent to by inverse detection link, using known inverse detection link gain,
Actual backward power is calculated, wherein, the backward power can be used to calculate VSWR.
The detecting system of current most of base stations, the side being multiplexed using forward detection link and inverse detection link
Formula carries out realtime power detection.Forward detection link and the core concept of inverse detection link multiplexing are：In sampling
Process is made a distinction at unit, is multiplexed completely after sampling unit, so as to realize that simplifying for link is designed.It is real
When power detection core concept be：System is sampled in real time to current forward power, backward power, point
Not through forward detection link and inverse detection link, digital power is calculated by digital intermediate frequency unit, using known
Forward link gain (Gfwd) or reverse link gain (Grev) is counter is pushed into antenna opening, so as to reflect sky
The real-time forward power of mouth and backward power.Calculating every time has independence, real-time.Wherein, Gfwd or
Person Grev be base station during the manufacturing, through test determine link gain, be fixed value.
At present, when real-time forward power very little, for example, forward power is hundred milliwatt ranks even more hour,
Be present very big defect in above-mentioned realtime power detection method, mainly include：
1) during forward power very little, forward detection signal can be fainter, and now forward detection signal was being sampled
Cheng Zhongyi is affected by sampling unit stability, causes error of sampling very big；
2) during forward power very little, forward detection signal can be fainter, now forward direction sampled signal through it is front to
Detection link, the interference of easy acceptor's transmitting chain causes to detect that power swing is very big；
3) during forward power very little, forward detection signal can be fainter, and now forward direction sampled signal is through modulus
After conversion, easily affected by modulus switching device, digital device bottom of making an uproar, cause power calculation error too big.
Due to the impact of various factors so that forward power calculation error is excessive, that is, cause real-time forward power
Detection is inaccurate, or even cannot detect.
The content of the invention
It is an object of the invention to provide a kind of power detecting method and device, can preferably solve wireless base station and exist
During transmitting low-power level signal, forward power detection error is larger, or even the problem that cannot be detected.
According to an aspect of the invention, there is provided a kind of power detecting method, including：
Transmitting chain sends calibration number using protection period (Guard Period, the GP) time slot between transmitting-receiving time slot
According to；
Using the testing result to the calibration data, by transmitting chain gain calibration to target gain；
The transmission power of the business datum that detection is sent by the transmitting chain；
Using the calibrated transmitting chain gain and the transmission power of the business datum to target gain, really
Fixed real-time forward power.
Preferably, the testing result using to calibration data, transmitting chain gain calibration to target gain,
Including：
By carrying out power detection to the calibration data, the transmission power and forward direction number of the calibration data is obtained
Word detects power；
Using default forward link gain, the transmission power of the calibration data and forward direction Digital Detecting power,
It is determined that the transmitting chain gain before calibration；
According to the transmitting chain gain before the calibration and the target gain, the transmitting chain before the calibration is determined
Gain error between road gain and the target gain；
According to the gain error, the transmitting chain is calibrated, so that the link of the transmitting chain
Gain is by the transmitting chain gain calibration before calibrating to the target gain.
Preferably, it is described the transmitting chain is calibrated according to gain error, including：
The gain error and predetermined threshold value are compared；
According to comparative result, the link gain of radio-frequency transmissions link and/or digital intermediate frequency downlink processing unit is calibrated,
So that the transmitting chain gain is equal to the target gain.
Preferably, it is described using the calibrated transmitting chain gain to target gain and the business datum
Transmission power, it is determined that forward power in real time, including：
By by the calibrated transmitting chain gain and the transmission power of the business datum to target gain
It is added, obtains real-time forward power.
Preferably, also include：
After transmitting chain gain calibration to target gain, by carrying out power detection to the calibration data,
Obtain the transmission power of the calibration data, reverse Digital Detecting power；
Transmission power and the calibrated transmitting chain gain to target gain using the calibration data, really
Determine GP time slot forward powers；
Using the reverse Digital Detecting power and default reverse link gain, GP time slot backward powers are determined；
According to the GP time slots forward power and the GP time slots backward power, voltage standing wave ratio is determined.
According to a further aspect in the invention, there is provided a kind of power detection device, including：
Data transmission blocks, for being sent via transmitting chain using the protection period GP time slots between transmitting-receiving time slot
Calibration data；
Gain calibration module, for using the testing result to the calibration data, by transmitting chain gain calibration
To target gain；
Power detection module, for detecting the transmission power of the business datum sent by the transmitting chain；
Power determination module, for using the calibrated transmitting chain gain to target gain and the business
The transmission power of data, it is determined that forward power in real time.
Preferably, the gain calibration module is described obtained from power detection is carried out to the calibration data
The transmission power and forward direction Digital Detecting power, default forward link gain of calibration data, it is determined that before calibration
Transmitting chain gain, and according to the transmitting chain gain before the calibration and the target gain, determine the school
The gain error between transmitting chain gain and the target gain before standard, according to the gain error, to institute
State transmitting chain to be calibrated, so that the link gain of the transmitting chain calibrates to the target gain.
Preferably, the gain calibration module is compared the gain error and predetermined threshold value, and according to than
Relatively result, calibrates the link gain of radio-frequency transmissions link and/or digital intermediate frequency downlink processing unit, makes described sending out
Link gain is penetrated equal to the target gain.
Preferably, the power determination module by by the calibrated transmitting chain gain to target gain and
The transmission power of the business datum is added, and obtains real-time forward power.
Preferably, also include：
Standing-wave ratio determining module, for after transmitting chain gain calibration to target gain, using to the school
Quasi- data carry out the transmission power of the calibration data obtained from power detection and it is described it is calibrated to target increase
The transmitting chain gain of benefit, determines GP time slot forward powers, and using to the calibration data power detection is carried out
Obtained from reversely Digital Detecting power and default reverse link gain, determine GP time slot backward powers, and
According to the GP time slots forward power and the GP time slots backward power, voltage standing wave ratio is determined.
Compared with prior art, the beneficial effects of the present invention is：
The present invention has by using any time division duplex (Time Division Duplexing, TDD) system
As transmitting-receiving protection interval Gp time slots, issue certain high-power data (i.e. calibration data), then carry out
The calibration of power and power detection, indirectly extrapolate actual power of eating dishes without rice or wine, that is, detect the reality under low-power level signal
Border forward power, it is single easily by sampling in small-signal ventrocephalad sampled signal so as to efficiently solve wireless base station
First stability influence and cause the very big problem of error of sampling, forward direction sampled signal easy when forward detection link
Disturbed by transmission signal and cause the very big problem of power swing, and analog digital conversion is subject to after analog digital conversion
Device, digital device make an uproar bottom impact and cause the too big problem of power calculation error.
Description of the drawings
Fig. 1 is power detecting method flow chart provided in an embodiment of the present invention；
Fig. 2 is power detection device block diagram provided in an embodiment of the present invention；
Fig. 3 is radio frequency link functional block diagram in wireless base station provided in an embodiment of the present invention；
Fig. 4 is the frame assumption diagram of time-division Long Term Evolution (TD-LTE) standard provided in an embodiment of the present invention；
Fig. 5 is the special subframe configuration figure of TD-LTE standards provided in an embodiment of the present invention；
Fig. 6 is TD SDMA provided in an embodiment of the present invention (TD-SCDMA) frame assumption diagram；
Fig. 7 is calibration of power flow chart provided in an embodiment of the present invention；
Fig. 8 is power detection flow chart provided in an embodiment of the present invention；
Fig. 9 is voltage standing wave ratio provided in an embodiment of the present invention (VSWR) calculation flow chart.
Specific embodiment
Below in conjunction with accompanying drawing to a preferred embodiment of the present invention will be described in detail, it will be appreciated that described below
Preferred embodiment be merely to illustrate and explain the present invention, be not intended to limit the present invention.
Fig. 1 is power detecting method flow chart provided in an embodiment of the present invention, as shown in figure 1, including：
Step S100：Transmitting chain sends calibration data using the GP time slots between transmitting-receiving time slot.
The calibration data is a kind of high-power signal data, and its power can choose the specified transmission power in base station
More than 10%, the specified transmission power in preferred base station.
Step S200：Using the testing result to the calibration data, by transmitting chain gain (Gtx) calibration
To target gain (Gdest).
Specifically, by carrying out power detection to the calibration data, the transmitting work(of the calibration data is obtained
Rate (TSSI) and forward direction Digital Detecting power (FWD)；Then using default forward link gain (Gfwd),
The TSSI and FWD of the calibration data, determines Gtx, i.e. Gtx=FWD-Gfwd-TSSI；According to Gtx
And Gdest, determine the gain error (Δ G) between Gtx and the Gdest, i.e. Δ G=abs (Gtx-Gdest)；
According to Δ G, the transmitting chain gain calibration to target gain.
Furtherly, Δ G is compared with predetermined threshold value, and according to comparative result, calibrates radio-frequency transmissions chain
Road and/or the link gain of digital intermediate frequency downlink processing unit, so that the transmitting chain gain is equal to described
Target gain.Specifically, when Δ G is less than predetermined threshold value, the link of digital intermediate frequency downlink processing unit is adjusted
Gain, that is, carry out fine tuning；When Δ G is equal to predetermined threshold value, the link gain of radio-frequency transmissions link is adjusted, i.e.,
Carry out coarse adjustment；When Δ G is more than predetermined threshold value, it is adjusted by the way of coarse adjustment and fine tuning combine.With
Predetermined threshold value is 0.5dB, and Δ G is respectively equal to as a example by 0.2dB, 0.5dB and 0.7dB, when Δ G is equal to 0.2dB
When, it is less than 0.5dB, now, the link gain of digital intermediate frequency downlink processing unit is adjusted into 0.2dB；When
When Δ G is equal to 0.5dB, it is equal to 0.5dB, now, the link gain of radio-frequency transmissions link is adjusted into 0.5dB；
When Δ G is equal to 0.7dB, it is more than 0.5dB, now, the link gain of radio-frequency transmissions link is adjusted
0.5dB, and the link gain of digital intermediate frequency downlink processing unit is adjusted into 0.2dB.
Power detecting method proposed by the invention depends on the calibration of power, specifically, by using step
Certain big signal (i.e. verification data) in S100 is being calibrated so that transmitting chain gain is equal to known
Target gain, solve the link gain ripple caused because of factors such as ambient temperature, operating frequency, individual variations
Dynamic problem.
Step S300：The transmission power of the business datum that detection is sent by the transmitting chain.
Step S400：Using the calibrated Gtx and the transmission power of the business datum to Gdest,
It is determined that real-time forward power (Pfwd).
Specifically, by by the calibrated Gtx and the transmission power phase of the business datum to Gdest
Plus, obtain Pfwd.
It can be seen that, the present invention is a kind of general forward power detection technique that can be applicable to TDD wireless base stations, its
Realize each specification wireless base station of each standards of TDD when small-power is launched using a kind of unitized method for designing
Accurately carry out power detection and calculating.Furtherly, the present invention carries out work(by using certain high-power signal
Rate is detected, while by a series of derivation calculating, indirectly detecting the actual forward direction under low-power level signal
Power, solving low-power level signal cannot detect or detect inaccurate problem.
Further, because the forward power larger in small-power transmission signal of wireless base station in prior art is examined
Error is surveyed, can cause to depend on the VSWR calculation errors of power detection also very big.The present invention can not only be effective
Meet the too big problem of small-power detection error under various TDD standards, additionally it is possible to realize high-precision power control
System and VSWR detect function, and such that it is able to pass through the VSWR for calculating hardware link, outer antennas are accurately reflected
State, solves the problems such as no alarm, empty alarm for producing during direct detection.The calculation procedure that VSWR is calculated is such as
Under, after Gtx is calibrated to Gdest, by carrying out power detection to the calibration data, obtain the school
The TSSI of quasi- data, reverse Digital Detecting power (REV)；Using the TSSI of the calibration data and calibrated
To the Gtx of Gdest, GP time slot forward powers (Pfwd) is determined；Increased using REV and default reverse link
Beneficial (Grev), determines GP time slot backward powers (Prev)；According to Pfwd and Prev, VSWR is determined.Specifically
Say, during transmitting chain sends calibration data using the protection period GP time slots between transmitting-receiving time slot, lead to first in ground
Cross and the digital power of the calibration data is calculated in real time, obtain the TSSI of the calibration data.Secondly
By carrying out power inspection to the front forward signal to sampling unit sampling and via radio frequency forward detection link transmission
Survey, obtain FWD, by the sampling of reverse sampling unit and via the reverse letter of radio frequency inverse detection link transmission
Number power detection is carried out, obtain REV.Then, by by the calibrated Gtx to Gdest and the school
The TSSI of quasi- data is added, and obtains Pfwd, and by the way that REV is subtracted each other with default Grev, obtains Prev,
So as to using the VSWR of Pfwd and Prev computing systems.
Fig. 2 is power detection device block diagram provided in an embodiment of the present invention, as shown in Fig. 2 including data is activation
Module 10, gain calibration module 20, power detection module 30 and power determination module 40.
Data transmission blocks 10 are used to send calibration number via transmitting chain using the GP time slots between transmitting-receiving time slot
According to the calibration data is a kind of high-power signal data, the specified transmission power in preferred base station.
Gain calibration module 20 is used for using the testing result to the calibration data, and Gtx is calibrated to
Gdest.Specifically, the gain calibration module utilizes and carries out power detection to the calibration data and obtain
The calibration data TSSI and FWD, default Gfwd, determine Gtx, and according to Gtx and Gdest,
Determine Δ G, according to Δ G, Gtx is calibrated to Gdest.Furtherly, the gain calibration module is by Δ G
It is compared with predetermined threshold value, and according to comparative result, calibrates radio-frequency transmissions link and/or digital intermediate frequency is descending
The link gain of processing unit, makes Gtx be equal to Gdest.So that predetermined threshold value is as 0.5dB as an example, when Δ G (examples
Such as be equal to 0.2dB) less than 0.5dB when, the link gain of digital intermediate frequency downlink processing unit is adjusted into 0.2dB,
The gain error less than threshold value is undertaken using digital intermediate frequency downlink processing unit；When Δ G is equal to 0.5dB, this
When, the link gain of radio-frequency transmissions link is adjusted into 0.5dB, i.e., undertake 0.5dB's using radio-frequency transmissions link
The gain error of integral multiple part；When Δ G (such as equal to 0.7dB) is more than 0.5dB, by radio-frequency transmissions
The link gain adjustment 0.5dB of link, and the link gain of digital intermediate frequency downlink processing unit is adjusted into 0.2dB.
Power detection module 30 is used to Gtx be calibrated to Gdest, detects the industry sent by the transmitting chain
The transmission power of business data.
Power determination module 40 is used for sending out using the calibrated Gtx to Gdest and the business datum
Power is penetrated, it is determined that Pfwd in real time.Specifically, power determination module 40 passes through calibrated to Gdest
Gtx be added with the transmission power of the business datum, obtain real-time forward power.
Power detecting method proposed by the invention and device, can be also used for the VSWR meters of TDD wireless base stations
Calculate, cannot detect that VSWR or detection error are big etc. under low-power level signal so as to solve TDD wireless base stations
Problem.Specifically, also include：Standing-wave ratio determining module 50, for after Gtx being calibrated to Gdest,
The TSSI of the calibration data and described calibrated obtained from power detection is carried out to the calibration data
To the Gtx of Gdest, GP time slot Pfwd are determined, obtained using power detection is carried out to the calibration data
REV and default Grev, determine GP time slot Prev, and according to GP time slot Pfwd and GP time slot Prev,
Determine VSW.
Fig. 3 is radio frequency link functional block diagram in wireless base station provided in an embodiment of the present invention, as shown in figure 3, including：
Base-band digital processing unit 101：For the modulate emission of baseband signal.
Digital intermediate frequency downlink processing unit 102：Different systems, different carrier waves, different frame are realized in the present invention
Signal digital power when structure is configured is calculated in real time, and different types of fixed data source (i.e. verification data
Source) and the switching of business datum source.Wherein, digital power calculates the I/Q data that mode is sampling a period of time,
Then summation is averaged, and obtains real-time base-band digital power TSSI.
Radio-frequency transmissions link 103：Complete conversion, gain amplification, filtering of the digital medium-frequency signal to analogue signal
The functions such as output.Its link gain Gtx is generally followed by link device state, complete machine temperature, frequency etc. and ripple occurs
It is dynamic, cause to eat dishes without rice or wine in real time power in fluctuation.
Digital intermediate frequency power detecting unit 104a and 104b：By front reverse signal is carried out power detection and based on
Calculate.
Forward detection link 105：Complete coupling sampling, power amplification, frequency conversion of forward signal etc., chain
Road gain is Gfwd, is usually fixed.
Forward direction sampling unit 106：The sampling of forward signal is completed, and gives radio frequency forward detection link 105.
Inverse detection link 107：Complete coupling sampling, power amplification, frequency conversion of reverse signal etc., chain
Road gain is Grev, is usually fixed.
Reverse sampling unit 108：The sampling of reverse signal is completed, and gives radio frequency inverse detection link 107.
Antenna element 109, for system transmission signal is radiated into space with electromagnetic wave, while receiving empty
Between electromagnetic wave signal.
The present invention ensure that system accurately detects forward power and and VSWR in normal work.Specifically
Say, the present invention determines power detection side according to the standard of TDD wireless base stations, specification and current configuration information
Method.The method is entered by sending fixed data source in Gp time slots by field programmable gate array (FPGA)
Row power detection, determines transmitting chain gain, then using the real-time calculating of base-band digital power, obtains accurately
Forward power, so as to realize that the calibration of power of forward link, power detection and VSWR detection is calculated.
For the base station of any TDD standards, transmitting, reception are all the time-divisions, i.e., do not exist and receive simultaneously
With transmitting situation, meanwhile, transmitting-receiving time slot between also there is certain protection interval.For example, in Fig. 4 institutes
In showing TD-SCDMA frame assumption diagrams shown in TD-LTE frame assumption diagrams and Fig. 6, all there is a Gp time slot, should
Time slot is not launched, is not also received, and is that an application is blank.
Fig. 4 is the frame assumption diagram of time-division Long Term Evolution (TD-LTE) standard provided in an embodiment of the present invention, is such as schemed
Shown in 4, each 10ms radio frames is divided into 10 subframes (subframe0～9), each subframe 1ms by
30720Ts is constituted, each Ts duration 1/30.72MHz.In all subframes, subframe 1 (subframe1)
It is divided into descending pilot frequency time slot (DwPTS), Gp time slots, the part of uplink pilot time slot (UpPTS) three.Wherein
Gp time slots be exactly the present invention need utilize and protect time slot.
Fig. 5 is the special subframe configuration figure of TD-LTE standards provided in an embodiment of the present invention, as shown in figure 5,
The subframe has 30720Ts altogether, according to different configuration modes, DwPTS, Gp, UpPTS is divided.
How to use Gp and special subframe to configure to further understand, now illustrate by taking TD-LTE as an example, other
TDD standards are similar with TD-LTE usages.
One has 9 kinds of different special subframe configurations, the lower DwPTS of each configuration in the chart that Fig. 5 is given
It is different from the duration of UpPTS.Under the extended cyclic prefix configuration of configuration 8, DwPTS (24144Ts)
With UpPTS (5120Ts) summation be 29264Ts, be most long in all configurations, with reference to Fig. 4 as can be seen that
When a length of 1456Ts (30720Ts-29264Ts) of Gp is distributed to, is most short in all configurations, you can profit
Gp slot lengths are minimum, calculated according to LTE protocol, Gp total durations about 47.4us now
(1456/30.72MHz).For digital intermediate frequency power detecting unit, 1,000 sampling points be enough to accurately meter
Power is calculated, when sampling rate is 245.76MHz, 1,000 sampling points about 4.07us (1000/245.76MHz).
Less than 1/10th of Gp time slot overall lengths.Therefore, under the configuration of any one special subframe, when Gp has enough
Between for power detection.
Fig. 6 is TD SDMA provided in an embodiment of the present invention (TD-SCDMA) frame assumption diagram, is such as schemed
Shown in 6, each 5ms subframe is divided into 7 business time-slots (Ts0～6) and 1 special time slot, and special time slot is included
The part of DwPTS, Gp, UpPTS tri- is constituted.Wherein, the TD-LTE usages mentioned in the usage and the embodiment of the present invention of Gp
It is similar.
The present invention is realized wireless base station forward power calibration using the Gp time slots and is detected.In order to realize standard
True power detection it may first have to depend on the calibration of power.The thinking of the calibration of power is, in Gp time slots
In certain a period of time, fixed data source (fixed data source of such as rated power) is sent, now forward power
For system peak power output, carried out after power detection by forward detection link, then extrapolate it is actual before
To power, and actual transmitting chain gain is adjusted for target gain.Wherein, certain a period of time being previously mentioned,
One section of moment in the duration according to the Gp under different frame structure in different TDD standards, time span by
The sampling location of system, sampling number and sample rate determine, but no more than Gp total durations；The volume being previously mentioned
Determine power and refer to system maximum transmission power；The fixed data source being previously mentioned is set form known to system, consolidates
Determine the data source of power, such as single-tone, standard signal, white noise.
Fig. 7 is calibration of power flow chart provided in an embodiment of the present invention, as shown in fig. 7, comprises：
Step S401：After the calibration of power starts, obtain preset parameter and obtain, specifically include reading system in production
Preset parameter in manufacture, such as Gfwd, Grev, Gdest.
Step S402：Switch to fixed data source.
Signal is switched to into fixed data source in Gp time slots by digital intermediate frequency downlink processing unit 102, the fixed number
It is to determine according to the watt level in source, the 90% of the specified transmission power in such as base station.
Step S403：Calculate digital power TSSI, i.e. transmission signal intensity to indicate.
By digital intermediate frequency downlink processing unit 102 fixed data source of Gp time slots is carried out adopting several calculating, obtained
Value power TSSI.
Step S404：Calculate FWD.
By digital intermediate frequency power detecting unit 104a the fixed data source of Gp time slots is carried out adopting several calculating, obtained
Value power FWD.
Step S405：Calculate the gain error △ G of Gtx and Gdest.
Gtx=FWD-Gfwd-TSSI；
Δ G=abs (Gtx-Gfwd).
Step S406：Whether Δ G is judged higher than thresholding, i.e. predetermined threshold value, if being higher than thresholding, execution step
S407, otherwise execution step S408.Present embodiment assumes that the thresholding is 0.5dB.
Step S407：If greater than equal to 0.5dB, then the link gain of adjustment radio-frequency transmissions link 103 undertakes
More than 0.5dB integral multiples part, then execution step S408.Wherein, 0.5dB sources are radio-frequency transmissions links 103
Gain tuning stepping.According to different system, the value is changed.
Step S408：If less than 0.5dB, then the link gain of adjustment digital intermediate frequency downlink processing unit 102
Undertake remainder.
Assume to be calculated in step S405 △ G for 1.3db, it can be seen from step S406 to step S408, according to
Gain tuning stepping carries out coarse adjustment to radio-frequency transmissions link 103, that is, adjust 1db, to digital intermediate frequency downlink processing list
Unit 102 carries out fine tuning, that is, adjust remaining 0.3db.
Step S409：Fixed data source is switched to into business datum source by digital intermediate frequency downlink processing unit 102,
Then calibration of power flow process is terminated.
After completing the calibration of power, transmitting chain gain now is equal to the set goal gain, and data source switching is extensive
Become normal service signal again.Now digital intermediate frequency downlink processing unit 102 is calculated by sampling, and is worked as
Front actual digital power, in conjunction with target gain actual forward power is obtained, so as to complete accurate power
Detection.
Fig. 8 is power detection flow chart provided in an embodiment of the present invention, as shown in figure 8, including：
Step S501：Complete after the calibration of power according to flow process shown in Fig. 7, obtain current Gtx equal to Gdest.
Step S502：The TSSI of subframe needed for calculating.
The digital power of the subframe of statistics, time slot needed for being calculated in real time by digital intermediate frequency downlink processing unit 102,
Obtain TSSI.
Step S503：After calculating real-time forward power Pfwd, terminate power detection.
Actual power Pfwd=Gtx+TSSI is calculated by digital intermediate frequency downlink processing unit 102.
Power detecting method is to VSWR computational accuracies in the TDD system being previously mentioned in the present invention for convenience of description
Improvement, illustrate with reference to Fig. 9.
Fig. 9 is VSWR calculation flow charts provided in an embodiment of the present invention, as shown in figure 9, including：
Step S601：VSWR detections start, and switch to fixed data source.
Signal is switched to into fixed data source in Gp time slots by digital intermediate frequency downlink processing unit 102, the fixed number
It is to determine according to the watt level in source.
Step S602：By power detection, Gp time slot forward power Pfwd are obtained.
Step S603：Calculate power of reversely eating dishes without rice or wine.
Preset parameter Grev of the reading system in the manufacturing, then by digital intermediate frequency power detecting unit 104b
Detection calculates the REV of Gp time slots, calculates Gp time slot backward powers Prev=REV-Grev.
Step S604：Using Pfwd and Prev, the VSWR of computing system.
Step S605：Switch to business datum source.
Fixed data source is switched to into business datum source by digital intermediate frequency downlink processing unit 102, and terminates VSWR
Testing process.
To sum up, the present embodiment is fixed first the switching of data source, to work(before being obtained using power detection flow process
Rate；Secondly, by means of reverse Digital Detecting power and reverse link gain, detection calculating is carried out to backward power；
Then, VSWR calculating is carried out using forward power and backward power.It can be seen that, the covert utilization full power of the present invention
Signal has carried out real-time VSWR power detections, substantially increases accuracy of detection.
Calibration of power flow process and power detection flow process described by the embodiment of the present invention, its Time window depends on and is
System design, can periodically carry out the calibration of power and power detection, it is also possible to disposably calibrated when upper electric
And detection, or the calibration that triggered by certain specified conditions and detection.
It will be understood by those skilled in the art that the specific embodiment of the invention, the method referred in the present invention
Or strategy can be realized by any digital processing element, its all or part of module can also use one
Or multiple hardware devices are realizing, it would however also be possible to employ the form that software function or soft or hard are combined is realized.
In sum, the present invention has following technique effect：
The present invention, using the switching of fixed data source, completes power based on the Gp time slots in TDD system
Calibration and power detection, solve the problems, such as that the detection error that practical business signal exists when too small is excessive, it is ensured that
The accuracy and reliability of detection.
Although being described in detail to the present invention above, the invention is not restricted to this, the art technology
Personnel can carry out various modifications with principle of the invention.Therefore, all modifications made according to the principle of the invention,
All should be understood to fall into protection scope of the present invention.
Claims (10)
1. a kind of power detecting method, it is characterised in that include：
Transmitting chain sends calibration data using the protection period GP time slots between transmitting-receiving time slot；
Using the testing result to the calibration data, by transmitting chain gain calibration to target gain；
The transmission power of the business datum that detection is sent by the transmitting chain；
Using the calibrated transmitting chain gain and the transmission power of the business datum to target gain, really
Fixed real-time forward power.
2. method according to claim 1, it is characterised in that the detection using to calibration data
As a result, transmitting chain gain calibration to target gain, including：
By carrying out power detection to the calibration data, the transmission power and forward direction number of the calibration data is obtained
Word detects power；
Using default forward link gain, the transmission power of the calibration data and forward direction Digital Detecting power,
It is determined that the transmitting chain gain before calibration；
According to the transmitting chain gain before the calibration and the target gain, the transmitting chain before the calibration is determined
Gain error between road gain and the target gain；
According to the gain error, the transmitting chain is calibrated, so that the link of the transmitting chain
Gain is by the transmitting chain gain calibration before calibrating to the target gain.
3. method according to claim 2, it is characterised in that described according to gain error, to described
Transmitting chain is calibrated, including：
The gain error and predetermined threshold value are compared；
According to comparative result, the link gain of radio-frequency transmissions link and/or digital intermediate frequency downlink processing unit is calibrated,
So that the transmitting chain gain is equal to the target gain.
4. method according to claim 1, it is characterised in that described using described calibrated to target
The transmitting chain gain of gain and the transmission power of the business datum, it is determined that forward power in real time, including：
By by the calibrated transmitting chain gain and the transmission power of the business datum to target gain
It is added, obtains real-time forward power.
5. the method according to claim 1-4 any one, it is characterised in that also include：
After transmitting chain gain calibration to target gain, by carrying out power detection to the calibration data,
Obtain the transmission power of the calibration data, reverse Digital Detecting power；
Transmission power and the calibrated transmitting chain gain to target gain using the calibration data, really
Determine GP time slot forward powers；
Using the reverse Digital Detecting power and default reverse link gain, GP time slot backward powers are determined；
According to the GP time slots forward power and the GP time slots backward power, voltage standing wave ratio is determined.
6. a kind of power detection device, it is characterised in that include：
Data transmission blocks, for being sent via transmitting chain using the protection period GP time slots between transmitting-receiving time slot
Calibration data；
Gain calibration module, for using the testing result to the calibration data, by transmitting chain gain calibration
To target gain；
Power detection module, for detecting the transmission power of the business datum sent by the transmitting chain；
Power determination module, for using the calibrated transmitting chain gain to target gain and the business
The transmission power of data, it is determined that forward power in real time.
7. device according to claim 6, it is characterised in that the gain calibration module is utilized to institute
Stating calibration data carries out the transmission power of the calibration data obtained from power detection and forward direction Digital Detecting work(
Rate, default forward link gain, it is determined that calibration before transmitting chain gain, and according to the calibration before send out
Penetrate link gain and the target gain, determine the transmitting chain gain before the calibration and the target gain it
Between gain error, according to the gain error, the transmitting chain is calibrated, so that the transmitting
The link gain of link calibrates to the target gain.
8. device according to claim 7, it is characterised in that the gain calibration module is by the increasing
Beneficial error is compared with predetermined threshold value, and according to comparative result, in calibration radio-frequency transmissions link and/or numeral
The link gain of frequency downlink processing unit, makes the transmitting chain gain be equal to the target gain.
9. device according to claim 6, it is characterised in that the power determination module is by by institute
State the calibrated transmitting chain gain to target gain to be added with the transmission power of the business datum, obtain in real time
Forward power.
10. the device according to claim 6-9 any one, it is characterised in that also include：
Standing-wave ratio determining module, for after transmitting chain gain calibration to target gain, using to the school
Quasi- data carry out the transmission power of the calibration data obtained from power detection and it is described it is calibrated to target increase
The transmitting chain gain of benefit, determines GP time slot forward powers, and using to the calibration data power detection is carried out
Obtained from reversely Digital Detecting power and default reverse link gain, determine GP time slot backward powers, and
According to the GP time slots forward power and the GP time slots backward power, voltage standing wave ratio is determined.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510658652.9A CN106571879A (en) | 2015-10-12 | 2015-10-12 | Power detection method and device |
| PCT/CN2016/088438 WO2017063390A1 (en) | 2015-10-12 | 2016-07-04 | Power measurement method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510658652.9A CN106571879A (en) | 2015-10-12 | 2015-10-12 | Power detection method and device |
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| Publication Number | Publication Date |
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| CN106571879A true CN106571879A (en) | 2017-04-19 |
Family
ID=58508203
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510658652.9A Pending CN106571879A (en) | 2015-10-12 | 2015-10-12 | Power detection method and device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106571879A (en) |
| WO (1) | WO2017063390A1 (en) |
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| WO2020258777A1 (en) * | 2019-06-25 | 2020-12-30 | 三维通信股份有限公司 | Standing wave ratio measurement method and apparatus, computer device, and readable storage medium |
| CN112867126A (en) * | 2020-12-29 | 2021-05-28 | 京信网络系统股份有限公司 | Link gain self-adaption method and device, computer equipment and storage medium |
| CN115051763A (en) * | 2022-06-16 | 2022-09-13 | 维沃移动通信有限公司 | Method and device for measuring voltage standing wave ratio and electronic equipment |
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| WO2017063390A1 (en) | 2017-04-20 |
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