CN106712863A - Method and apparatus for calibrating Bluetooth transmitting power - Google Patents
Method and apparatus for calibrating Bluetooth transmitting power Download PDFInfo
- Publication number
- CN106712863A CN106712863A CN201710142230.5A CN201710142230A CN106712863A CN 106712863 A CN106712863 A CN 106712863A CN 201710142230 A CN201710142230 A CN 201710142230A CN 106712863 A CN106712863 A CN 106712863A
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 108091006146 Channels Proteins 0.000 claims abstract description 70
- 230000005540 biological transmission Effects 0.000 claims description 45
- 238000005259 measurement Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000005457 optimization Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 238000003908 quality control method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/101—Monitoring; Testing of transmitters for measurement of specific parameters of the transmitter or components thereof
- H04B17/102—Power radiated at antenna
-
- 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
-
- H04B5/70—
Abstract
The invention provides a method and apparatus for calibrating Bluetooth transmitting power. The method comprises the following steps: grouping line segments in a curve according to a linear relationship between the Bluetooth transmitting power and channel sequence numbers, selecting proper starting and ending channels for each group, recording a channel sequence number ni, and measuring the transmitting power pi of the starting and ending channels of the groups of the line segments; calculating a slope ai and an intercept bi of each line segment; fitting the transmitting power of all channels according to the line segments; and performing power calibration on the fitted transmitting power. By adoption of the method and apparatus for calibrating Bluetooth transmitting power provided by the invention, compared with the fixed grouping algorithm in the prior art, the accuracy of the calibration algorithm can be greatly improved on the premise of not increasing the time complexity of the calibration algorithm, and thus higher production requirements and calibration requirements are satisfied.
Description
Technical field
The present invention relates to Bluetooth signal collimation technique field, and in particular to a kind of method for the Bluetooth transmission calibration of power
And device.
Background technology
The transmission power of bluetooth module is influenceed by undesirable radio frequency analog device etc., in order to ensure factory's hardware product
Quality Control system is guaranteed and the accuracy of the function such as indoor positioning, navigation is improved, it is necessary to reception and transmitting to bluetooth module
The actual power at end is accurately calibrated.
Bluetooth module has 79 channels, but too big to the cost that whole 79 bluetooth channels are calibrated, so mesh
79 channels are equally divided into 5 groups by preceding bluetooth module transmission power calibration method first in calibration, and each group takes centre position
Channel calibrated, and the power calibration data calculated by these channels is applied to the whole channels in group.For example set
13.00dBm is put for transmission power, first group of actual emission power and errors of 16 channels such as institute of table one for measuring
Show, it can be seen that, with the power error on the different channels of group and differ, launch work(which results in current bluetooth module
Rate calibration method can not provide sufficiently accurate calibration.
One first group of each channel errors of table
| Channel designator | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| Measured value/dBm | 11.90 | 11.93 | 11.97 | 11.98 | 12.02 | 12.03 | 12.05 | 12.09 |
| Error/dB | 1.10 | 1.07 | 1.03 | 1.02 | 0.98 | 0.97 | 0.95 | 0.81 |
| Channel designator | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| Measured value/dBm | 12.11 | 12.13 | 12.17 | 12.19 | 12.22 | 12.10 | 12.12 | 12.14 |
| Error/dB | 0.89 | 0.87 | 0.83 | 0.81 | 0.78 | 0.90 | 0.88 | 0.86 |
Accordingly, it would be desirable on the premise of algorithm complex is not improved, improve algorithm calibration accuracy, bluetooth module hair is improved
Penetrate calibration of power algorithm and seem very necessary.
The content of the invention
The present invention is in order to solve the above mentioned problem of prior art presence, there is provided a kind of algorithm calibration accuracy of improving
For the method and device of the Bluetooth transmission calibration of power.
Above-mentioned purpose is realized, the invention provides a kind of method for the Bluetooth transmission calibration of power, is comprised the following steps：
Be grouped for the line segment in curve with the linear relationship of channel designator by the transmission power according to bluetooth, and is packet
In each group selection suitably rise, whole channel, and be recorded as channel designator ni, each line segment of measurement is grouped, the hair of whole channel
Penetrate power pi；
Calculate every slope a of line segmentiWith intercept bi, wherein,
Slope computing formula is as follows：
Intercept computing formula is as follows：
bi=pi-aini；
The transmission power of all channels is fitted according to line segment, specific formula is as follows：
Pout-k=aik+bi
The transmission power that will be fitted carries out the calibration of power, compensation error Poffset-kSpecific formula for calculation it is as follows：
Poffset-k=Pset-Pout-k
Wherein, k is selected channel sequence number, and i is the group where selected channel, Pout-kIt is the transmission power of selected channel, Pset
It is the standard emission power of the channel.
As present invention further optimization scheme, by the linear relationship of the transmission power of bluetooth and channel designator by curve
In line segment be grouped specially：
Choosing N bars channel using Dynamic Packet carries out line segment packet, and N-1 packet is obtained.
As present invention further optimization scheme, the N=5 or N=9.
As present invention further optimization scheme, each group in packet rise, whole channel is every two ends of line segment.
Present invention also offers a kind of device for the Bluetooth transmission calibration of power, the device includes control computer and radio frequency
Power meter, the control computer is connected with radio frequency power meter, is penetrated to radio frequency power meter, and reception for sending instrument control signal
The test signal of frequency power meter feedback, data communication is carried out between the radio frequency power meter and equipment to be calibrated by bluetooth, is made
Radio frequency power meter is obtained to measure the Bluetooth signal of equipment to be calibrated and return data to control computer, and by control computer using upper
State the method described in any one and realize calibration.
Method for the Bluetooth transmission calibration of power of the invention, by including step：Transmission power according to bluetooth with
Be grouped for line segment in curve by the linear relationship of channel designator, and for packet in each group selection suitably rise, eventually letter
Road, and it is recorded as channel designator ni, each line segment of measurement is grouped, the transmission power p of whole channeli；Calculate every slope a of line segmenti
With intercept bi；The transmission power of all channels is fitted according to line segment；The transmission power that will be fitted carries out the calibration of power so that
The present invention compared with the fixed grouping algorithm of prior art, on the premise of the time complexity for not improving calibration algorithm, can be big
Width improves the accuracy of calibration algorithm, so as to meet higher production requirement and alignment requirements.
Device for the Bluetooth transmission calibration of power of the invention, it is described by including control computer and radio frequency power meter
Control computer is connected with radio frequency power meter, and for sending instrument control signal to radio frequency power meter, and it is anti-to receive radio frequency power meter
The test signal of feedback, data communication is carried out between the radio frequency power meter and equipment to be calibrated by bluetooth, so that radio-frequency power
The Bluetooth signal of meter measurement equipment to be calibrated simultaneously returns data to control computer, and use any of the above-described institute by control computer
The method stated realizes calibration so that the present invention compared with the fixed grouping algorithm of prior art, do not improve calibration algorithm when
Between on the premise of complexity, the accuracy of calibration algorithm can be greatly improved, will so as to meet higher production requirement and calibration
Ask.
Brief description of the drawings
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
The method flow diagram of the example that Fig. 1 is provided for the present invention for the method for the Bluetooth transmission calibration of power；
The structured flowchart of the example that Fig. 2 is provided for the present invention for the device of the Bluetooth transmission calibration of power；
Fig. 3 is to fix grouping algorithm and the comparative result figure using the inventive method using prior art.
The object of the invention is realized, functional characteristics and advantage will be described further referring to the drawings in conjunction with the embodiments.
Specific embodiment
Below in conjunction with accompanying drawing and specific embodiment, the present invention is described further.Drawn in preferred embodiment
Such as " on ", D score, "left", "right", " centre " and " one " term, only for ease of narration understand, and be not used to limit
The enforceable scope of the present invention, its relativeness is altered or modified, under without essence change technology contents, when being also considered as this hair
Bright enforceable category.
The method flow diagram of the example that Fig. 1 is provided for the present invention for the method for the Bluetooth transmission calibration of power, such as Fig. 1 institutes
Show, for the method for the Bluetooth transmission calibration of power, comprise the following steps：
Be grouped for the line segment in curve with the linear relationship of channel designator by step 11, the transmission power according to bluetooth,
And for packet in each group selection suitably rise, whole channel, and be recorded as channel designator ni, each line segment of measurement is grouped, end
The transmission power p of channeli；
Step 12, calculates every slope a of line segmentiWith intercept bi, wherein,
Slope computing formula is as follows：
Intercept computing formula is as follows：
bi=pi-aini；
Step 13, the transmission power of all channels is fitted according to line segment, and specific formula is as follows：
Pout-k=aik+bi
Step 14, the transmission power that will be fitted carries out the calibration of power, compensation error Poffset-kSpecific formula for calculation such as
Under：
Poffset-k=Pset-Pout-k
Wherein, k is selected channel sequence number, and i is the group where selected channel, Pout-kIt is the transmission power of selected channel, Pset
It is the standard emission power of the channel.
In specific implementation, be grouped for the line segment in curve with the linear relationship of channel designator by the transmission power of bluetooth
Specially：
Choosing N bars channel using Dynamic Packet carries out line segment packet, and N-1 packet is obtained.
In specific implementation, the N=5 or N=9, certain N can also be other concrete numerical values, not do example one by one herein
Lift.
In specific implementation, each group in packet rise, whole channel is chosen as every two ends of line segment.
As shown in Fig. 2 present invention also offers a kind of device for the Bluetooth transmission calibration of power, the device includes control
Computer and radio frequency power meter, the control computer are connected with radio frequency power meter, for sending instrument control signal to radio-frequency power
Meter, and the test signal of radio frequency power meter feedback is received, carried out by bluetooth between the radio frequency power meter and equipment to be calibrated
Data communication so that radio frequency power meter measures the Bluetooth signal of equipment to be calibrated and returns data to control computer, and by controlling
Computer processed realizes calibration using the above method.
In order to allow those skilled in the art to more fully understand and realize technical scheme, brief description this implementation
The operation principle of example.
By bluetooth channel (2402-2480MHz) so that 1MHz is divided into 79 channels altogether for interval as an example, current conventional calibration
These bluetooth channels are equally divided into 5 groups by algorithm, and using every group of channel in centre position as calibration channel, the school of this channel
Quasi- data are applied to the channel in whole group, substantially journey linear relationship between the transmission power and channel designator of its bluetooth, and
When 9dbm is set into bluetooth power output, measured power, linear fit, improvement distribute and fix packet four groups of numerals such as Fig. 3
It is shown, it is the comparative result figure using the fixed grouping algorithm of tradition and calibration of power algorithm of the present invention, the fixed grouping algorithm of tradition
Compared with calibration of power algorithm of the present invention, innovatory algorithm reduces mean square error, absolute error is reduced, and improve calibration and calculated
The degree of accuracy of method is substantially improved.
The present invention under lab, respectively under three kinds of different configuration conditions, respectively 1-DH5,3-DH5 and LE,
The calibration effect of system is weighed using mean square error (MSE) and standard error (Std.Dev), as a result as shown in following table two：
| Mean square error | 1-DH5 | 3-DH5 | LE |
| Before calibration | 4.5483 | 2.6685 | 1.9474 |
| Current calibration algorithm | 011123 | 0.1874 | 0.2241 |
| Improved calibration algorithm | 0.0217 | 0.0178 | 0.0217 |
(a) mean square error contrast table
(b) absolute error contrast table
Table two, prior art calibration of power algorithm and the results contrast for improving calibration algorithm
It can be seen from the results above that mean square error is reduced nearly 10 times by innovatory algorithm, absolute error is reduced into
Originally 1/3rd, its numerical value is also fallen below less than 0.15dB from about 0.5dB, and the degree of accuracy for improving calibration algorithm is significantly carried
Rise.
The present invention by the relation founding mathematical models of bluetooth channel and bluetooth module transmission power, by math computation result
Control transmission power calibration process.Configured according to certain hardware environment, suitable Dynamic Packet number is chosen in bluetooth channel
It is grouped and is determined to separate these channel designators being grouped, is calculated the transmission power and error on these separated channels.Pass through
The transmission power of two adjacent separated channels of sequence number calculates a line segment, is fitted between separated channels according to this line segment
The transmission power of channel, then calculates the error on every channel and calibrates.So cause that the present embodiment is fixed with prior art
Grouping algorithm is compared, and the accurate of calibration method can greatly improved on the premise of the time complexity for not improving calibration algorithm
Degree.
Although the foregoing describing specific embodiment of the invention, those skilled in the art should be appreciated that this
It is merely illustrative of, various changes or modifications can be made to present embodiment, without departing from principle of the invention and essence,
Protection scope of the present invention is only limited by the claims that follow.
Claims (5)
1. a kind of method for the Bluetooth transmission calibration of power, it is characterised in that comprise the following steps：
Be grouped for the line segment in curve with the linear relationship of channel designator by the transmission power according to bluetooth, and in packet
Each group selection suitably rises, whole channel, and is recorded as channel designator ni, each line segment of measurement is grouped, the transmitting work(of whole channel
Rate pi；
Calculate every slope a of line segmentiWith intercept bi, wherein,
Slope computing formula is as follows：
Intercept computing formula is as follows：
bi=pi-aini；
The transmission power of all channels is fitted according to line segment, specific formula is as follows：
Pout-k=aik+bi
The transmission power that will be fitted carries out the calibration of power, compensation error Poffset-kSpecific formula for calculation it is as follows：
Poffset-k=Pset-Pout-k
Wherein, k is selected channel sequence number, and i is the group where selected channel, Pout-kIt is the transmission power of selected channel, PsetFor this
The standard emission power of channel.
2. according to the method for the Bluetooth transmission calibration of power described in claim 1, it is characterised in that by the transmitting work(of bluetooth
Be grouped the line segment in curve specially with the linear relationship of channel designator by rate：
Choosing N bars channel using Dynamic Packet carries out line segment packet, and N-1 packet is obtained.
3. according to the method for the Bluetooth transmission calibration of power described in claim 2, it is characterised in that the N=5 or N
=9.
4. according to the method for the Bluetooth transmission calibration of power described in any one of claims 1 to 3, it is characterised in that packet
In each group rise, whole channel is every two ends of line segment.
5. a kind of device for the Bluetooth transmission calibration of power, it is characterised in that described including control computer and radio frequency power meter
Control computer is connected with radio frequency power meter, and for sending instrument control signal to radio frequency power meter, and it is anti-to receive radio frequency power meter
The test signal of feedback, carries out data communication so that radio-frequency power between the radio frequency power meter and equipment to be calibrated by bluetooth
The Bluetooth signal of meter measurement equipment to be calibrated simultaneously returns data to control computer, and use claim 1-4 by control computer
Method described in any one realizes calibration.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710142230.5A CN106712863B (en) | 2017-03-10 | 2017-03-10 | Method and device for the Bluetooth transmission calibration of power |
| PCT/CN2017/078038 WO2018161377A1 (en) | 2017-03-10 | 2017-03-24 | Method and device for calibrating bluetooth transmitting power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710142230.5A CN106712863B (en) | 2017-03-10 | 2017-03-10 | Method and device for the Bluetooth transmission calibration of power |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106712863A true CN106712863A (en) | 2017-05-24 |
| CN106712863B CN106712863B (en) | 2018-12-28 |
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ID=58912705
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710142230.5A Active CN106712863B (en) | 2017-03-10 | 2017-03-10 | Method and device for the Bluetooth transmission calibration of power |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106712863B (en) |
| WO (1) | WO2018161377A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108400823A (en) * | 2018-02-27 | 2018-08-14 | 四川斐讯信息技术有限公司 | A kind of calibration method and equipment of radio-frequency emission power |
| CN110531301A (en) * | 2018-05-23 | 2019-12-03 | 北京北方华创微电子装备有限公司 | The calibration method and calibrating installation of radio-frequency power supply output power |
| CN112798901A (en) * | 2020-12-29 | 2021-05-14 | 成都沃特塞恩电子技术有限公司 | Equipment calibration system and method |
| CN115314129A (en) * | 2022-07-15 | 2022-11-08 | 成都爱旗科技有限公司 | Radio frequency power calibration method and device and electronic equipment |
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| US20090033572A1 (en) * | 2007-08-01 | 2009-02-05 | Research In Motion Limited | System and method of measuring total radiated power from mobile wireless communications device |
| CN204993872U (en) * | 2015-09-23 | 2016-01-20 | 珠海市杰理科技有限公司 | Bluetooth detection device |
| CN105262551A (en) * | 2015-11-25 | 2016-01-20 | 上海市计量测试技术研究院 | Wireless signal tester calibration device and method, and automatic testing system and method |
| CN105656570A (en) * | 2015-12-30 | 2016-06-08 | 南方科技大学 | Transmit power calibration method, transmit power calibration system, and radio frequency system |
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- 2017-03-10 CN CN201710142230.5A patent/CN106712863B/en active Active
- 2017-03-24 WO PCT/CN2017/078038 patent/WO2018161377A1/en active Application Filing
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| US20090033572A1 (en) * | 2007-08-01 | 2009-02-05 | Research In Motion Limited | System and method of measuring total radiated power from mobile wireless communications device |
| CN204993872U (en) * | 2015-09-23 | 2016-01-20 | 珠海市杰理科技有限公司 | Bluetooth detection device |
| CN105262551A (en) * | 2015-11-25 | 2016-01-20 | 上海市计量测试技术研究院 | Wireless signal tester calibration device and method, and automatic testing system and method |
| CN105656570A (en) * | 2015-12-30 | 2016-06-08 | 南方科技大学 | Transmit power calibration method, transmit power calibration system, and radio frequency system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108400823A (en) * | 2018-02-27 | 2018-08-14 | 四川斐讯信息技术有限公司 | A kind of calibration method and equipment of radio-frequency emission power |
| CN110531301A (en) * | 2018-05-23 | 2019-12-03 | 北京北方华创微电子装备有限公司 | The calibration method and calibrating installation of radio-frequency power supply output power |
| CN110531301B (en) * | 2018-05-23 | 2021-11-16 | 北京北方华创微电子装备有限公司 | Calibration method and calibration device for output power of radio frequency power supply |
| CN112798901A (en) * | 2020-12-29 | 2021-05-14 | 成都沃特塞恩电子技术有限公司 | Equipment calibration system and method |
| CN112798901B (en) * | 2020-12-29 | 2023-01-10 | 成都沃特塞恩电子技术有限公司 | Equipment calibration system and method |
| CN115314129A (en) * | 2022-07-15 | 2022-11-08 | 成都爱旗科技有限公司 | Radio frequency power calibration method and device and electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106712863B (en) | 2018-12-28 |
| WO2018161377A1 (en) | 2018-09-13 |
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