CN104320203B - Wireless frequency calibration device and method - Google Patents
Wireless frequency calibration device and method Download PDFInfo
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- CN104320203B CN104320203B CN201410110897.3A CN201410110897A CN104320203B CN 104320203 B CN104320203 B CN 104320203B CN 201410110897 A CN201410110897 A CN 201410110897A CN 104320203 B CN104320203 B CN 104320203B
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- calibration signal
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Abstract
The invention discloses a wireless frequency calibration device and method. The wireless frequency calibration device comprises a wireless receiver for receiving, amplifying and sampling a wireless calibration signal; a frequency detection module for recognizing whether the wireless calibration signal is a reference frequency; a frequency measurement module for measuring the reference frequency based on an oscillation frequency of a local oscillator so as to obtain a measurement result when the frequency detection module recognizes that the wireless calibration signal is the reference frequency; and a judging calibration module for judging whether the oscillation frequency is higher or lower than the reference frequency according to the measurement result, and calibrating the oscillation frequency of the local oscillator according to the judgment result. The device and the method disclosed by the invention have the advantages of being low in cost and easy to implement.
Description
Technical field
The present invention relates to wireless frequency calibrating installatio, more particularly to a kind of wireless frequency that can exempt local reference clock
Calibrating installation and method.
Background technology
It is the basis of the present age the most frequently used short-range radio frequency communicating circuit based on warbled wireless transmit-receive technology, it is such as blue
Tooth etc..In the art, the accuracy of the frequency at communication receiving/transmission two ends determines the bit error rate and signal to noise ratio of the signal of frequency hopping channel.
For this purpose, in this communication apparatus, high-precision crystal oscillator is the basis that communication is able to efficiently carry out, meanwhile, it is also this
The key component of the electronics Material Cost of a little communication modules.Reduce the cost of this part, be now reduce communication module into
One of this most important demand.
The content of the invention
The invention discloses a kind of wireless frequency calibrating installatio.The wireless frequency calibrating installatio includes：Wireless receiver, is used for
Receive, amplify and sampling wireless calibration signal；Frequency detection module, for recognizing whether the wireless calibration signal is with reference to frequency
Rate；Frequency measuring block, for when it is reference frequency that the frequency detection module recognizes the wireless calibration signal, based on locally shaking
The frequency of oscillation for swinging device measures the reference frequency to obtain a measurement result；And judgement calibration module, for according to the measurement
As a result judge that the frequency of oscillation is above or below the reference frequency, and the local oscillator is calibrated according to the judged result
Frequency of oscillation.
The present invention also discloses a kind of wireless frequency calibration steps, including：(1) reference frequency that receives, amplifies and sample is led to
The wireless calibration signal in road；(2) recognize whether the wireless calibration signal is reference frequency, in this way, then execution step (4) is otherwise held
Row step (3)；(3) next reference frequency passage, and return to step (1) are jumped to；(4) frequency of oscillation based on local oscillator
Measure the reference frequency to obtain a measurement result；And (5) judge the oscillation frequency of the local oscillator according to the measurement result
Rate is above or below the reference frequency, and calibrates the frequency of oscillation of the local oscillator according to the judged result.
Therefore, wireless frequency calibrating installatio of the invention and method allow local device in the situation without reference to clock
Under, wirelessly obtain reference clock to calibrate local clock.Present invention eliminates the reference in local electronic equipment
Clock circuit, so as to be conducive to cost-effective and convenient enforcement.
Description of the drawings
Fig. 1 shows the block schematic diagram of the wireless frequency calibrating installatio of the present invention.
Fig. 2 shows the scattergram of the reference frequency passage of one embodiment of the invention.
The enforcement Organization Chart of the frequency detection module of Fig. 3 examples present invention.
The frequency measuring block of Fig. 4 example one embodiment of the invention.
The flow chart of the wireless frequency calibration steps of Fig. 5 examples present invention.
Specific embodiment
Embodiments of the present invention are illustrated below by particular specific embodiment.Those skilled in the art can be by this theory
Content disclosed in bright book understands easily other advantages and effect of the present invention.
Fig. 1 shows the block schematic diagram of the wireless frequency calibrating installatio of the present invention.As shown in figure 1, the wireless frequency of the present invention
Rate calibrating installation includes wireless receiver 10, frequency detection module 11, frequency measuring block 12, judgement calibration module 13 and sheet
Ground agitator 14.
Wireless frequency calibration in, wireless receiver 10 be used for receive, amplify and sample reference frequency channel on it is wireless
Calibration signal.Frequency detection module 11 is used to recognize whether the wireless calibration signal is reference frequency.When frequency detection module 11
Recognize the wireless calibration signal be reference frequency when, frequency measuring block 12 based on local oscillator 14 frequency of oscillation measurement should
Reference frequency is obtaining a measurement result.Judgement calibration module 13 is used to judge shaking for local oscillator 14 according to the measurement result
Swing frequency and be above or below the reference frequency, and the frequency of oscillation of local oscillator 14 is calibrated according to the judged result.
Fig. 2 shows the scattergram of the reference frequency passage of one embodiment of the invention.As shown in Fig. 2 at complete wireless
In penetrating the frequency channel at end, in addition to for the data channel for transmitting data, such as 3 reference frequency passages 0, reference can be distributed
Frequency channel 1 and reference frequency passage 2 are calibrated for wireless frequency calibrating installatio working frequency.Wireless receiver 10 is by receiving the ginseng
Examine the wireless calibration signal of frequency channel to calibrate.When there is interference or channel blockage in a reference frequency passage, wirelessly
Receptor 10 can transfer the wireless calibration signal for receiving next reference frequency passage.Calibration frequency passage can so be substantially reduced
Blocked probability.
The enforcement framework of the interior processing unit of Fig. 3 example frequencies detection module 11.As shown in figure 3, the frequency detecting mould
Block 11 includes be divided by unit 19, derivation unit 20 and judging unit 21.From the wireless calibration signal that wireless receiver 10 is received
Including orthogonal signalling I and Q.Division arithmetic is carried out to two signals in the unit 19 that is divided by of frequency detection module 11, to obtain
Obtain a division result.Then, derivative operation is carried out to the division result in derivation unit 20, to obtain an operation result.Root
According to corresponding theory, if the wireless calibration signal for being received is reference frequency rather than noise or other interference signals, should
Operation result should be constant.Therefore, judging unit 21 judges whether the operation result is constant.It is such as constant, then recognizes the nothing
Line calibration signal is reference frequency.
Fig. 4 is according to the frequency measuring block 12 of one embodiment of the invention.As shown in figure 4, in this embodiment, frequency is surveyed
Amount module 12 is a timer.When it is reference frequency that frequency detection module 11 recognizes the wireless calibration signal, the frequency measurement
Module 12 carries out Clocked operation to the reference frequency using the frequency of oscillation of local oscillator 14, and exports timing result conduct
Measurement result.
The flow chart of Fig. 5 examples wireless frequency calibration steps of the present invention.As shown in figure 5, first, in step S11, wirelessly connect
Receive device 10 receive, amplify and sample reference frequency channel 0,1 or 2 on wireless calibration signal.Then, in step s 12, recognize
Whether the wireless calibration signal is reference frequency.If not reference frequency, then execution step S13, by wireless receiver 10
Frequency jumps to next reference frequency passage, and repeat step S11；Otherwise, if recognizing that the wireless calibration signal is with reference to frequency
Rate, then execution step S14.In step S14, frequency measuring block 12 measures the reference based on the frequency of oscillation of local oscillator 14
Frequency is obtaining a measurement result.Then, in step S15, calibration judge module 13 judges locally to shake according to the measurement result
The frequency of oscillation for swinging device 14 is above or below the reference frequency, and shaking according to the judged result calibration local oscillator 14
Swing frequency.
In sum, wireless frequency calibrating installatio receives the reference frequency signal in reference frequency passage in the present invention, with
Using the reference frequency signal calibration local oscillator, so that local clock is consistent with transmitting terminal clock.In addition, arrange leading to more
Road reference frequency is conducive to being prevented effectively from interference and noise, to improve precision and calibration success rate.Calibrating installation in the present invention
And method allows electronic equipment wirelessly to obtain reference clock, and without the need for arranging reference in the electronic equipment
Clock circuit, thus greatly reduce electronics Material Cost.Meanwhile, the device and method of the present invention can be conveniently embedded to tradition
Wireless transceiver circuit such as bluetooth in.Therefore, the present invention has the advantages that with low cost, easy to implement.
The merely illustrative property of above-described embodiment, and the unrestricted present invention.Those skilled in the art can be without prejudice to this
Under bright spirit and scope, various modifications and changes are carried out to above-described embodiment.
Claims (5)
1. a kind of wireless frequency calibrating installatio, it is characterised in that include：
Wireless receiver, for receiving, amplifying and sampling wireless calibration signal；
Frequency detection module, for recognizing whether the wireless calibration signal is reference frequency, wherein, the frequency detection module bag
Include：
Be divided by unit, for carrying out division arithmetic to wireless calibration signal, to obtain a division result；
Derivation unit, for carrying out derivative operation to the division result, to obtain an operation result；And
Judging unit, is such as constant for judging whether the operation result is constant, then recognize that the wireless calibration signal is reference
Frequency；
Frequency measuring block, for when it is reference frequency that the frequency detection module recognizes the wireless calibration signal, based on local
The frequency of oscillation of agitator measures the reference frequency to obtain a measurement result；And
Judgement calibration module, for judging that the frequency of oscillation is above or below the reference frequency according to the measurement result, and
The frequency of oscillation of the local oscillator is calibrated according to judged result.
2. device as claimed in claim 1, it is characterised in that the wireless receiver is from one or more reference frequency passages
Receive the wireless calibration signal.
3. device as claimed in claim 1, it is characterised in that the frequency measuring block is a timer.
4. a kind of wireless frequency calibration steps, it is characterised in that include：
(1) wireless calibration signal receive, amplified and sample a reference frequency passage；
(2) recognize whether the wireless calibration signal is reference frequency, in this way, then execution step (4) otherwise execution step (3), its
In, recognize whether the wireless calibration signal is that reference frequency includes：
(21) division arithmetic is carried out to the wireless calibration signal, to obtain a division result；
(22) derivative operation is carried out to the division result, to obtain an operation result；And
(23) judge whether the operation result is constant, be such as constant, then recognize that the wireless calibration signal is reference frequency；
(3) next reference frequency passage, and return to step (1) are jumped to；
(4) measure the reference frequency to obtain a measurement result based on the frequency of oscillation of local oscillator；
(5) judge that the frequency of oscillation of the local oscillator is above or below the reference frequency according to the measurement result, and according to
It is judged that result calibrates the frequency of oscillation of the local oscillator.
5. method as claimed in claim 4, it is characterised in that the reference frequency is measured based on the frequency of oscillation of local oscillator
It is that Clocked operation is carried out to the reference frequency based on the frequency of oscillation, to obtain the measurement result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410110897.3A CN104320203B (en) | 2014-03-24 | 2014-03-24 | Wireless frequency calibration device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410110897.3A CN104320203B (en) | 2014-03-24 | 2014-03-24 | Wireless frequency calibration device and method |
Publications (2)
| Publication Number | Publication Date |
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| CN104320203A CN104320203A (en) | 2015-01-28 |
| CN104320203B true CN104320203B (en) | 2017-04-12 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101499800A (en) * | 2008-01-28 | 2009-08-05 | 财团法人工业技术研究院 | Oscillating circuit |
| CN101567705A (en) * | 2009-03-31 | 2009-10-28 | 中兴通讯股份有限公司 | Mobile terminal and uplink channel local frequency regulation method |
| CN102081426A (en) * | 2009-11-30 | 2011-06-01 | 原相科技股份有限公司 | Frequency adjustment device and frequency adjustment method for adjustable oscillator |
| CN102196468A (en) * | 2010-03-10 | 2011-09-21 | 美国博通公司 | Communication method and communication system |
| CN103503529A (en) * | 2011-04-26 | 2014-01-08 | 瑞典爱立信有限公司 | Base station synchronization |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7349680B2 (en) * | 2002-04-29 | 2008-03-25 | Broadcom Corporation | Method and system for using PSK sync word for fine tuning frequency adjustment |
-
2014
- 2014-03-24 CN CN201410110897.3A patent/CN104320203B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101499800A (en) * | 2008-01-28 | 2009-08-05 | 财团法人工业技术研究院 | Oscillating circuit |
| CN101567705A (en) * | 2009-03-31 | 2009-10-28 | 中兴通讯股份有限公司 | Mobile terminal and uplink channel local frequency regulation method |
| CN102081426A (en) * | 2009-11-30 | 2011-06-01 | 原相科技股份有限公司 | Frequency adjustment device and frequency adjustment method for adjustable oscillator |
| CN102196468A (en) * | 2010-03-10 | 2011-09-21 | 美国博通公司 | Communication method and communication system |
| CN103503529A (en) * | 2011-04-26 | 2014-01-08 | 瑞典爱立信有限公司 | Base station synchronization |
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| CN104320203A (en) | 2015-01-28 |
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Owner name: SHANGHAI MACROGIGA ELECTRONICS CO., LTD. Free format text: FORMER OWNER: JIA HONGYONG Effective date: 20150330 |
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Effective date of registration: 20150330 Address after: 201203 Shanghai city Pudong New Area Zuchongzhi Road No. 2305 B room 808 Applicant after: SHANGHAI MACROGIGA ELECTRONICS Co.,Ltd. Address before: 201203 Shanghai city Pudong New Area Chenhui road 825 Lane 23-101 Applicant before: Jia Hongyong |
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Address after: No. 8, 3rd Floor, Building 72, Jinrun Industrial Park, Gaoxin Community, Gaochang Town, Xuzhou District, Yibin City, Sichuan Province, 644609 Patentee after: Sichuan Giant Micro Integrated Circuit Co.,Ltd. Address before: Room 808, Building B, No. 2305, Zuchong Road, Pudong New Area, Shanghai, 201203 Patentee before: SHANGHAI MACROGIGA ELECTRONICS Co.,Ltd. |
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