CN104320203A - Wireless frequency calibration device and method - Google Patents
Wireless frequency calibration device and method Download PDFInfo
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- CN104320203A CN104320203A CN201410110897.3A CN201410110897A CN104320203A CN 104320203 A CN104320203 A CN 104320203A CN 201410110897 A CN201410110897 A CN 201410110897A CN 104320203 A CN104320203 A CN 104320203A
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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 installation, particularly relate to a kind of wireless frequency calibrating installation and the method that can exempt local reference clock.
Background technology
Based on the basis that warbled wireless transmit-receive technology is contemporary the most frequently used short-range radio frequency communicating circuit, as bluetooth etc.In the art, the accuracy of the frequency at communication receiving/transmission two ends determines the error rate and the signal to noise ratio of the signal of frequency hopping channel.For this reason, in this communication apparatus, high-precision crystal oscillator is the basis of efficiently being carried out that communicates, and meanwhile, is also the chief component of the electronics Material Cost of these communication modules.Reducing the cost of this part, is one of most important demand reducing now communication module cost.
Summary of the invention
The present invention discloses a kind of wireless frequency calibrating installation.This wireless frequency calibrating installation comprises: wireless receiver, for receiving, amplifying and sampling wireless calibrating signal; Frequency detection module, for identifying whether this wireless calibrating signal is reference frequency; Frequency measuring block, for when this wireless calibrating signal of this frequency detection module identification is reference frequency, the frequency of oscillation based on local oscillator measures this reference frequency to obtain a measurement result; And judgement calibration module, for judge according to this measurement result this frequency of oscillation be higher than or lower than this reference frequency, and calibrate the frequency of oscillation of this local oscillator according to this judged result.
The present invention also discloses a kind of wireless frequency calibration steps, comprising: the wireless calibrating signal of (1) reception, amplification and a reference frequency passage of sampling; (2) identify whether this wireless calibrating signal is reference frequency, in this way, then perform step (4) otherwise perform step (3); (3) jump to next reference frequency passage, and return step (1); (4) frequency of oscillation based on local oscillator measures this reference frequency to obtain a measurement result; And (5) according to this measurement result judge the frequency of oscillation of this local oscillator be higher than or lower than this reference frequency, and calibrate the frequency of oscillation of this local oscillator according to this judged result.
Therefore, wireless frequency calibrating installation of the present invention and method allow local device when not having reference clock, wirelessly obtain reference clock and calibrate local clock.Present invention eliminates the reference clock circuit in local electronic equipment, thus be conducive to cost-saving and convenient enforcement.
Accompanying drawing explanation
Fig. 1 shows the block schematic diagram of wireless frequency calibrating installation of the present invention.
Fig. 2 shows the distribution map of the reference frequency passage of one embodiment of the invention.
The enforcement Organization Chart of Fig. 3 example frequency detection module of the present invention.
The frequency measuring block of Fig. 4 example one embodiment of the invention.
The flow chart of Fig. 5 example wireless frequency calibration steps of the present invention.
Embodiment
Below by particular specific embodiment, embodiments of the present invention are described.Those skilled in the art can understand other advantages of the present invention and effect easily by content disclosed in the present specification.
Fig. 1 shows the block schematic diagram of wireless frequency calibrating installation of the present invention.As shown in Figure 1, wireless frequency calibrating installation of the present invention comprises wireless receiver 10, frequency detection module 11, frequency measuring block 12, judges calibration module 13 and local oscillator 14.
In wireless frequency calibration, the wireless calibrating signal of wireless receiver 10 for receiving, amplifying and on sample reference frequency channel.Frequency detection module 11 is for identifying whether this wireless calibrating signal is reference frequency.When frequency detection module 11 identifies that this wireless calibrating signal is reference frequency, frequency measuring block 12 measures this reference frequency to obtain a measurement result based on the frequency of oscillation of local oscillator 14.Judge calibration module 13 for judge according to this measurement result the frequency of oscillation of local oscillator 14 be higher than or lower than this reference frequency, and according to this judged result calibration local oscillator 14 frequency of oscillation.
Fig. 2 shows the distribution map of the reference frequency passage of one embodiment of the invention.As shown in Figure 2, in the frequency channel of complete wireless transmitting terminals, except for transmitting except the data channel of data, such as 3 reference frequency passages 0, reference frequency passage 1 and reference frequency passages 2 can be distributed for the calibration of wireless frequency calibrating installation working frequency.Wireless receiver 10 is calibrated by the wireless calibrating signal receiving this reference frequency passage.When a reference frequency passage occurs for interference or channel blockage, wireless receiver 10 can transfer the wireless calibrating signal receiving next reference frequency passage.Greatly can reduce the possibility of calibration frequency channel jam like this.
The enforcement framework of the interior processing unit of Fig. 3 example frequency detection module 11.As shown in Figure 3, this frequency detection module 11 comprises the unit 19 that is divided by, differentiate unit 20 and judging unit 21.The wireless calibrating signal received from wireless receiver 10 comprises orthogonal signalling I and Q.In the unit 19 that is divided by of frequency detection module 11, division arithmetic is carried out, to obtain a division result to these two signals.Then, in differentiate unit 20, derivative operation is carried out to this division result, to obtain an operation result.According to corresponding theory, if the wireless calibrating signal received be reference frequency instead of noise or other interference signals time, then this operation result should be constant.Therefore, judging unit 21 judges whether this operation result is constant.As being constant, then identify that this wireless calibrating signal is reference frequency.
Fig. 4 is the frequency measuring block 12 according to one embodiment of the invention.As shown in Figure 4, in this embodiment, frequency measuring block 12 is a timer.When frequency detection module 11 identifies that this wireless calibrating signal is reference frequency, namely this frequency measuring block 12 utilizes the frequency of oscillation of local oscillator 14 to carry out Clocked operation to this reference frequency, and exports timing result as measurement result.
The flow chart of Fig. 5 example wireless frequency calibration steps of the present invention.As shown in Figure 5, first, in step S11, wireless receiver 10 receives, amplify and wireless calibrating signal on sample reference frequency channel 0,1 or 2.Then, in step s 12, identify whether this wireless calibrating signal is reference frequency.If not reference frequency, then perform step S13, the frequency of wireless receiver 10 is jumped to next reference frequency passage, and repeat step S11; Otherwise, if identify that this wireless calibrating signal is reference frequency, then perform step S14.In step S14, frequency measuring block 12 measures this reference frequency to obtain a measurement result based on the frequency of oscillation of local oscillator 14.Then, in step S15, calibration judge module 13 according to this measurement result judge the frequency of oscillation of local oscillator 14 be higher than or lower than this reference frequency, and calibrate the frequency of oscillation of local oscillator 14 according to this judged result.
In sum, in the present invention, wireless frequency calibrating installation receives the reference frequency signal in reference frequency passage, to utilize this reference frequency signal to calibrate local oscillator, thus makes local clock consistent with transmitting terminal clock.In addition, multichannel reference frequency is set and is conducive to effectively avoiding interference and noise, to improve precision and to be calibrated to power.Calibrating installation in the present invention and method allow electronic equipment wirelessly to obtain reference clock, and without the need to arranging reference clock circuit in this electronic equipment, thus greatly reduce electronics Material Cost.Meanwhile, device and method of the present invention can be embedded in traditional wireless transceiver circuit such as bluetooth easily.Therefore, the present invention has the advantages such as with low cost, easy to implement.
Above-described embodiment is only exemplary in nature, and unrestricted the present invention.Those skilled in the art without departing from the spirit and scope of the present invention, can carry out various modifications and changes to above-described embodiment.
Claims (7)
1. a wireless frequency calibrating installation, is characterized in that, comprising:
Wireless receiver, for receiving, amplifying and sampling wireless calibrating signal;
Frequency detection module, for identifying whether this wireless calibrating signal is reference frequency;
Frequency measuring block, for when this wireless calibrating signal of this frequency detection module identification is reference frequency, the frequency of oscillation based on local oscillator measures this reference frequency to obtain a measurement result; And
Judge calibration module, for judge according to this measurement result this frequency of oscillation be higher than or lower than this reference frequency, and calibrate the frequency of oscillation of this local oscillator according to this judged result.
2. device as claimed in claim 1, it is characterized in that, this wireless receiver receives this wireless calibrating signal in one or more reference frequency passage.
3. device as claimed in claim 1, it is characterized in that, this frequency detection module comprises:
Be divided by unit, for carrying out division arithmetic to wireless calibrating signal, to obtain a division result;
Differentiate unit, for carrying out derivative operation to this division result, to obtain an operation result; And
Judging unit, for judging whether this operation result is constant, as being constant, then identifies that this wireless calibrating signal is reference frequency.
4. device as claimed in claim 1, it is characterized in that, this frequency measuring block is a timer.
5. a wireless frequency calibration steps, is characterized in that, comprising:
(1) the wireless calibrating signal of reception, amplification and a reference frequency passage of sampling;
(2) identify whether this wireless calibrating signal is reference frequency, in this way, then perform step (4) otherwise perform step (3);
(3) jump to next reference frequency passage, and return step (1);
(4) frequency of oscillation based on local oscillator measures this reference frequency to obtain a measurement result; And
(5) according to this measurement result judge the frequency of oscillation of this local oscillator be higher than or lower than this reference frequency, and calibrate the frequency of oscillation of this local oscillator according to this judged result.
6. method as claimed in claim 5, is characterized in that, identify whether this wireless calibrating signal is that reference frequency comprises:
Division arithmetic is carried out to this wireless calibrating signal, to obtain a division result;
Derivative operation is carried out to this division result, to obtain an operation result; And
Judging whether this operation result is constant, as being constant, then identifying that this wireless calibrating signal is reference frequency.
7. method as claimed in claim 5, it is characterized in that, the frequency of oscillation based on local oscillator is measured this reference frequency system and is carried out Clocked operation based on this frequency of oscillation to this reference frequency, to obtain this measurement result.
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| CN201410110897.3A CN104320203B (en) | 2014-03-24 | 2014-03-24 | Wireless frequency calibration device and method |
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| CN201410110897.3A CN104320203B (en) | 2014-03-24 | 2014-03-24 | Wireless frequency calibration device and method |
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| CN104320203A true CN104320203A (en) | 2015-01-28 |
| CN104320203B CN104320203B (en) | 2017-04-12 |
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| US20050197064A1 (en) * | 2002-04-29 | 2005-09-08 | Brima Ibrahim | Method and system for using PSK sync word for fine tuning frequency adjustment |
| 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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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050197064A1 (en) * | 2002-04-29 | 2005-09-08 | Brima Ibrahim | Method and system for using PSK sync word for fine tuning frequency adjustment |
| 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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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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