CN106789785A - Wireless communication carriers frequency calibrating method and system without crystal oscillator - Google Patents
Wireless communication carriers frequency calibrating method and system without crystal oscillator Download PDFInfo
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- CN106789785A CN106789785A CN201611094385.8A CN201611094385A CN106789785A CN 106789785 A CN106789785 A CN 106789785A CN 201611094385 A CN201611094385 A CN 201611094385A CN 106789785 A CN106789785 A CN 106789785A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
- H04L2027/0024—Carrier regulation at the receiver end
- H04L2027/0026—Correction of carrier offset
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Abstract
The present invention relates to a kind of wireless communication carriers frequency calibrating method without crystal oscillator and system, wherein, methods described includes：Carrier frequency without crystal oscillator is adjusted to the first receives frequency by the tranmitting frequency according to wireless signal, and the tranmitting frequency of the wireless signal is given frequency；Wireless signal is monitored in first receives frequency, if monitoring, first receives frequency actual receives frequency is set to；If not monitoring the wireless signal in first receives frequency, first receives frequency is progressively adjusted until monitoring the wireless signal according to default step-length, and will monitor that the receives frequency of the wireless signal is set to actual receives frequency；The difference calculated between the given frequency and the actual receives frequency is defined as carrier wave frequency deviation；The carrier frequency without crystal oscillator is adjusted according to the carrier wave frequency deviation.The present invention can not only reduce the generation cost of carrier frequency, and can meet the demand of high accuracy and high-quality to carrier frequency.
Description
Technical field
The present invention relates to wireless communication technology field, the wireless communication carriers frequency calibrating method more particularly to without crystal oscillator
And system.
Background technology
In radio communication, carrier frequency is all operated in frequency higher, and frequency accuracy to carrier frequency with mutually make an uproar
There is requirement very high than quality.In order to meet requirement of the carrier frequency for precision and quality, generally in wireless communication system
It is middle to use active crystal oscillator or use the high-precision passive crystal oscillator of high-quality, produce the high-precision carrier frequency of high-quality to reach
Purpose, but it is all very high using the cost of active crystal oscillator or the high-precision passive crystal oscillator of high-quality.In the conventional technology, also use
Method of the complicated modulation-demo-demodulation method to reduce the requirement to the quality and precision of carrier frequency, or demodulated according to receiver
Signal out again compensated oscillator or PLL (Phase Locked Loop phaselocked loops) to reach the purpose of correction carrier frequency,
Although communication quality can be improved, still to rely on crystal oscillator and high-precision reference is provided.
The content of the invention
Based on this, it is necessary to for the problem for how providing the inexpensive, carrier frequency of high accuracy high-quality, there is provided a kind of
Wireless communication carriers frequency calibrating method and system without crystal oscillator, wherein, methods described includes：
Carrier frequency without crystal oscillator is adjusted to the first receives frequency, the wireless signal by the tranmitting frequency according to wireless signal
Tranmitting frequency be given frequency；
Wireless signal is monitored in first receives frequency, if monitoring the wireless communication in first receives frequency
Number, then first receives frequency is set to actual receives frequency；If not monitored in first receives frequency described
Wireless signal, then progressively adjust first receives frequency until monitoring the wireless signal according to default step-length, and will
Monitor that the receives frequency of the wireless signal is set to actual receives frequency；
The difference between the given frequency and the actual receives frequency is calculated, and the difference is defined as carrier frequency
Partially；
The carrier frequency without crystal oscillator is adjusted according to the carrier wave frequency deviation.
Wherein in one embodiment, the carrier frequency without crystal oscillator, including：
Oscillating circuit is simulated to produce reference clock using the first simulation oscillating circuit correction second, wherein, described first
Simulation oscillating circuit meets default frequency range, and the second simulation oscillating circuit meets default phase and makes an uproar scope；
Reference clock input phaselocked loop is produced into carrier frequency.
Wherein in one embodiment, the carrier frequency without crystal oscillator is adjusted to by the tranmitting frequency according to wireless signal
One receives frequency, including：
Obtain the systematic error E of the carrier frequency without crystal oscillator；
The given frequency F of systematic error E and the wireless signal according to the carrier frequency without crystal oscillator, will be without crystal oscillator
Carrier frequency be adjusted to the first receives frequency F1, and F1 ∈ (F-E, F+E).
It is described progressively to adjust first receives frequency according to default step-length until monitoring wherein in one embodiment
To the wireless signal, including：
First receives frequency is adjusted according to default fixed step size MS until monitoring the wireless signal, and | MS |
<Fe/2, wherein fe are maximum acceptable frequency deviation when demodulating the wireless signal.
It is described progressively to adjust first receives frequency according to default step-length until monitoring wherein in one embodiment
To the wireless signal, also include：
First receives frequency is adjusted until monitoring the wireless signal according to default variable step size VS, and it is described
| VS |=n* (fe/2), wherein fe are maximum acceptable frequency deviation when demodulating the wireless signal, and n is the random number more than 1.
It is described progressively to adjust first receives frequency according to default step-length until monitoring wherein in one embodiment
To the wireless signal, also include：
First receives frequency is progressively adjusted according to default step-length, and according to default on every synchronizing frequency after the adjustment
Monitoring duration monitor the wireless signal, until monitoring the wireless signal.
It is described that the carrier frequency without crystal oscillator is adjusted according to the carrier wave frequency deviation wherein in one embodiment, including：
The carrier wave generation parameter of the phaselocked loop is adjusted according to the carrier wave frequency deviation, to adjust the load that the phaselocked loop is produced
Wave frequency rate,.
Wherein in one embodiment, the given frequency according to wireless signal adjusts to the first receives frequency carrier frequency
Monitoring wireless signal, if not monitoring the wireless signal in first receives frequency, progressively adjusts according to default step-length
Whole first receives frequency is until detect wireless signal, will receive the frequency setting of wireless signal is actual reception frequency
Rate, by calculating the frequency-splitting between actual receives frequency and the given frequency of wireless signal, using described frequency-splitting
Adjust the carrier frequency that the passive crystal oscillator is produced.By the correction to the carrier frequency without crystal oscillator, generation carrier wave can be reduced
The cost of frequency, and the requirement to the high accuracy and high-quality of carrier frequency can be met.
Wherein in one embodiment, electricity is vibrated by using the simulation of high-precision simulation oscillating circuit correction high-quality
Reference clock of the road to export, so that the method for producing carrier frequency, can not only reduce the generation cost of carrier frequency, and can be full
High accuracy and the demand of high-quality of the foot to carrier frequency.
Wherein in one embodiment, when cannot monitor wireless signal in the first receives frequency, using fixed step size
First receives frequency is progressively adjusted, until the wireless signal is monitored, using the adjustment mode of fixed step size, Ke Yigeng
Plus simply and easily monitor wireless signal.
Wherein in one embodiment, when cannot monitor wireless signal in the first receives frequency, using variable step size
First receives frequency is progressively adjusted, until the wireless signal is monitored, using the adjustment mode of variable step size, Ke Yigeng
Plus quickly monitor wireless signal.
Wherein in one embodiment, while the first receives frequency is progressively adjusted, all set in every step receives frequency
Put certain monitoring duration, monitoring duration in monitor less than wireless signal after, then carry out next step carrier frequency adjustment, institute
The mode for stating society's money monitoring duration can improve the success rate for monitoring wireless signal.
The present invention also provides a kind of wireless communication carriers frequency correction system without crystal oscillator, including：
, be adjusted to for the carrier frequency without crystal oscillator for the tranmitting frequency according to wireless signal by the first receives frequency transmitter module
First receives frequency, the tranmitting frequency of the wireless signal is given frequency；
Actual receives frequency adjusting module, for monitoring wireless signal in first receives frequency, if described first
The wireless signal is monitored in receives frequency, then first receives frequency is set to actual receives frequency；If described
The wireless signal is not monitored in first receives frequency, then it is straight progressively to adjust first receives frequency according to default step-length
To monitoring the wireless signal, and will monitor that the receives frequency of the wireless signal is set to actual receives frequency；
Carrier wave frequency deviation calculates module, for calculating the difference between the given frequency and the actual receives frequency, and
The difference is defined as carrier wave frequency deviation；
Carrier frequency adjustment module, for adjusting the carrier frequency without crystal oscillator according to the carrier wave frequency deviation.
It is described to be produced without crystal oscillator carrier frequency wherein in one embodiment, including without crystal oscillator carrier frequency generation module
Module includes：
Simulation oscillation circuit unit, for simulating oscillating circuit to produce ginseng using the first simulation oscillating circuit correction second
Clock is examined, wherein, the first simulation oscillating circuit meets default frequency range, and the second simulation oscillating circuit meets pre-
If scope of mutually making an uproar；
Reference clock output unit, for reference clock input phaselocked loop to be produced into carrier frequency.
Wherein in one embodiment, the first receives frequency transmitter module, including：
Systematic error acquiring unit, the systematic error E for obtaining the carrier frequency without crystal oscillator；
First receives frequency adjustment unit, for systematic error E and the nothing according to the carrier frequency without crystal oscillator
The given frequency F of line signal, the first receives frequency F1, and F1 ∈ (F-E, F+E) are adjusted to by the carrier frequency without crystal oscillator.
Wherein in one embodiment, the actual receives frequency adjusting module, including：
Fixed step size adjustment unit, for adjusting first receives frequency according to default fixed step size MS until monitoring
To the wireless signal, and | MS |<Fe/2, wherein fe are maximum acceptable frequency deviation when demodulating the wireless signal.
Wherein in one embodiment, the actual receives frequency adjusting module also includes：
Variable step size adjustment unit, for adjusting first receives frequency according to default variable step size VS until monitoring
To the wireless signal, and described | VS |=n* (fe/2), wherein fe are maximum acceptable frequency when demodulating the wireless signal
Partially, n is the random number more than 1.
Wherein in one embodiment, the actual receives frequency adjusting module also includes：
Monitoring duration unit, for progressively adjusting first receives frequency according to default step-length, and after the adjustment
The wireless signal is monitored according to default monitoring duration on per synchronizing frequency, until monitoring the wireless signal.
Wherein in one embodiment, the carrier frequency adjustment module, including：
Phaselocked loop adjustment unit, the carrier wave generation parameter for adjusting the phaselocked loop according to the carrier wave frequency deviation, to adjust
The carrier frequency that the whole phaselocked loop is produced.
Wherein in one embodiment, the given frequency according to wireless signal adjusts to the first receives frequency carrier frequency
Monitoring wireless signal, if not monitoring the wireless signal in first receives frequency, progressively adjusts according to default step-length
Whole first receives frequency is until detect wireless signal, will receive the frequency setting of wireless signal is actual reception frequency
Rate, by calculating the frequency-splitting between actual receives frequency and the given frequency of wireless signal, using described frequency-splitting
Adjust the carrier frequency that the passive crystal oscillator is produced.By the correction to the carrier frequency without crystal oscillator, generation carrier wave can be reduced
The cost of frequency, and the requirement to the high accuracy and high-quality of carrier frequency can be met.
Wherein in one embodiment, electricity is vibrated by using the simulation of high-precision simulation oscillating circuit correction high-quality
Reference clock of the road to export, so that the method for producing carrier frequency, can not only reduce the generation cost of carrier frequency, and can be full
High accuracy and the demand of high-quality of the foot to carrier frequency.
Wherein in one embodiment, when cannot monitor wireless signal in the first receives frequency, using fixed step size
First receives frequency is progressively adjusted, until the wireless signal is monitored, using the adjustment mode of fixed step size, Ke Yigeng
Plus simply and easily monitor wireless signal.
Wherein in one embodiment, when cannot monitor wireless signal in the first receives frequency, using variable step size
First receives frequency is progressively adjusted, until the wireless signal is monitored, using the adjustment mode of variable step size, Ke Yigeng
Plus quickly monitor wireless signal.
Wherein in one embodiment, while the first receives frequency is progressively adjusted, all set in every step receives frequency
Put certain monitoring duration, monitoring duration in monitor less than wireless signal after, then carry out next step carrier frequency adjustment, institute
The mode for stating setting monitoring duration can improve the success rate for monitoring wireless signal.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the wireless communication carriers frequency calibrating method without crystal oscillator of one embodiment；
Fig. 2 is the schematic flow sheet of the wireless communication carriers frequency calibrating method without crystal oscillator of another embodiment；
Fig. 3 is the structural representation of the wireless communication carriers frequency correction system without crystal oscillator of one embodiment；
Fig. 4 is the structural representation of the wireless communication carriers frequency correction system without crystal oscillator of another embodiment；
Fig. 5 is the structural representation of the wireless communication carriers frequency correction system without crystal oscillator of further embodiment.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with drawings and Examples pair
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the present invention, not
For limiting the present invention.
Fig. 1 is the schematic flow sheet of the wireless communication carriers frequency calibrating method without crystal oscillator of one embodiment, such as Fig. 1 institutes
The wireless communication carriers frequency calibrating method without crystal oscillator for showing includes：
Carrier frequency without crystal oscillator is adjusted to the first receives frequency, institute by step S100, the tranmitting frequency according to wireless signal
The tranmitting frequency for stating wireless signal is given frequency.
Specifically, it is known to need the frequency of the wireless signal for receiving, it is not only applicable to provide Mobile Communication Service
Operator, is equally applicable to bluetooth, ZigBee technology (ZigBee protocol technology) etc..For example, for for TD-LTE networks, it is Chinese
Mobile frequency range is respectively 1880-1900MHZ, 2320-2370MHZ, 2575-2635MHZ, the frequency range of CHINAUNICOM
Respectively 2300-2320MHZ, 2555-2575MHZ, the frequency range of China Telecom are respectively 2370-2390MHZ, 2635-
2655MHZ.For example, if desired for receive be China Mobile 1890MHZ wireless signal, then need the load without crystal oscillator
Wave frequency rate, modulation 1890MH carries out the reception of China Mobile's 1890MHZ wireless signals.
Carrier frequency without crystal oscillator is adjusted to the first receives frequency by the tranmitting frequency according to wireless signal, including is obtained
The systematic error E of the carrier frequency without crystal oscillator, systematic error E according to the carrier frequency without crystal oscillator and described wireless
The given frequency F of signal, the first receives frequency F1, and F1 ∈ (F-E, F+E) are adjusted to by the carrier frequency without crystal oscillator.Specifically,
If the given frequency of the wireless signal is 1890MH, the systematic error of the carrier frequency without crystal oscillator is 10M, then, selected the
During one receives frequency, selected in the range of 1880MHZ-1900MHZ.
Step S200, monitors wireless signal, if being monitored in first receives frequency in first receives frequency
The wireless signal, then be set to actual receives frequency by first receives frequency；If in first receives frequency not
The wireless signal is monitored, then progressively adjusts first receives frequency according to default step-length until monitoring described wireless
Signal, and will monitor that the receives frequency of the wireless signal is set to actual receives frequency.
If specifically, the wireless signal of the 1890MHZ of China Mobile can be received in the carrier frequency of 1890MHZ,
Then 1890MHZ is exactly actual receives frequency.But due to there is systematic error, it is inclined to there is certain frequency in the carrier frequency without crystal oscillator
Difference, can not generally receive the wireless signal of 1890MHZ, it is necessary to carry out further in the first receives frequency for setting
Adjustment.
It is adjusted according to default step-length to the carrier signal without crystal oscillator, such as according to the step-length of 1MHZ, by 1890
Carrier frequency is adjusted to 1891MHZ, and the nothing of the 1890MHZ of reception China Mobile is continued to attempt in the carrier frequency of 1891MHZ
Line signal, is not received such as, and carrier frequency is adjusted to the wireless of the 1890MHZ of 1892MHZ trial receptions China Mobile for continuation
Signal, does not still receive such as, continues to be adjusted to 1893MHZ trial receptions, such as receives, then the carrier frequency of 1893MHZ is
Actual receives frequency.
Step S300, calculates the difference between the given frequency and the actual receives frequency, and the difference is true
It is set to carrier wave frequency deviation.
Specifically, by actual receives frequency and the difference of the given frequency finger tip of the wireless signal, being defined as carrier frequency
Partially.The wireless signal of the 1890MHZ of China Mobile is such as received in the carrier frequency of 1893MHZ, then carrier wave frequency deviation is 3MHZ.
Step S400, the carrier frequency without crystal oscillator is adjusted according to the carrier wave frequency deviation.
Specifically, the carrier wave frequency deviation, be the carrier frequency without crystal oscillator system by actual after checking
Systematic error, after being adjusted to the system of the carrier frequency without crystal oscillator according to the carrier wave frequency deviation, you can with using warp
Crossed the corrected carrier frequency without crystal oscillator of carrier wave frequency deviation continue receive other frequencies wireless signal.
In the present embodiment, carrier frequency is adjusted to the first receives frequency and monitors nothing by the given frequency according to wireless signal
Line signal, if not monitoring the wireless signal in first receives frequency, according to default step-length is progressively adjusted
First receives frequency is until detect wireless signal, the frequency setting that will receive wireless signal is actual receives frequency, is passed through
The frequency-splitting between actual receives frequency and the given frequency of wireless signal is calculated, it is described using described frequency-splitting adjustment
The carrier frequency that passive crystal oscillator is produced.By the correction to the carrier frequency without crystal oscillator, can reduce produce carrier frequency into
This, and the requirement to the high accuracy and high-quality of carrier frequency can be met.
It is described progressively to adjust first receives frequency according to default step-length until monitoring wherein in one embodiment
To the wireless signal, including first receives frequency is adjusted according to default fixed step size MS until monitoring described wireless
Signal, and | MS |<Fe/2, wherein fe are maximum acceptable frequency deviation when demodulating the wireless signal.Specifically, generally, according to
The adjustment mode of fixed step size, it is assumed that maximum acceptable frequency deviation when demodulating the wireless signal is 4MHZ, then received first
On the basis of frequency, 2MHZ is at most increased every time or 2MHZ is at most reduced, until receiving wireless signal.Using fixed step size
Adjustment mode, easily can monitor wireless signal with simpler.
It is described progressively to adjust first receives frequency according to default step-length until monitoring wherein in one embodiment
To the wireless signal, also including adjusting first receives frequency according to default variable step size VS until monitoring the nothing
Line signal, and described | VS |=n* (fe/2), wherein fe are maximum acceptable frequency deviation when demodulating the wireless signal, n is big
In 1 random number.Generally, according to the adjustment mode of variable step size, it is assumed that demodulate the maximum acceptable frequency during wireless signal
It is partially 4MHZ, then on the basis of the first receives frequency, is multiplied as step-length with the random value every time according to random number with 2MHZ, obtains
Take a variable step size to be adjusted first receives frequency, until receiving wireless signal.Further, due to variable
The step-length of step-length is not fixed, and variable step size may be received using variable step size to be just likely to be negative to described first
, it is necessary to adjust to a frequency do not monitored every time when frequency is adjusted, it is assumed that the carrier frequency F without crystal oscillator0's
Reference clock error is E1%, using adjusted first receives frequency of variable step size in [F0* (1-E1%):F0*(1-+
E1% in the range of)], adjustment is rapidly performed by, to ensure quickly to adjust to the receives frequency that can receive wireless signal.Adopt
With the adjustment mode of variable step size, wireless signal can be more quickly monitored.
It is described progressively to adjust first receives frequency according to default step-length until monitoring wherein in one embodiment
To the wireless signal, also including progressively adjusting first receives frequency, and often step after the adjustment according to default step-length
The wireless signal is monitored according to default monitoring duration in frequency, until monitoring the wireless signal.Specifically, setting prison
Survey the purpose of duration, can prevent from adjusting to a receives frequency just when because just without wireless signal or wireless
Signal is weaker and takes for being not received by, and proceeds the adjustment of next step.The mode for setting monitoring duration can be carried
Height monitors the success rate of wireless signal.
Fig. 2 is the schematic flow sheet of the wireless communication carriers frequency calibrating method without crystal oscillator of another embodiment, such as Fig. 2
The shown wireless communication carriers frequency calibrating method without crystal oscillator includes：
Step S80a, oscillating circuit is simulated to produce reference clock using the first simulation oscillating circuit correction second, wherein,
The first simulation oscillating circuit meets default frequency range, and the second simulation oscillating circuit meets default phase and makes an uproar model
Enclose.
Specifically, using the first simulation oscillating circuit for meeting default frequency range, as high-precision oscillating source, utilizing
Meet default phase make an uproar scope second simulation oscillating circuit, as high-quality oscillation source, using high-precision oscillating source to Gao Pin
After matter oscillation source is corrected, high-quality and high-precision reference clock can be exported.
Step S90a, carrier frequency is produced by reference clock input phaselocked loop.
Specifically, using the reference clock of the high accuracy high-quality, after input phaselocked loop, producing and meeting high accuracy and height
The carrier frequency of quality.
Carrier frequency without crystal oscillator is adjusted to the first receives frequency, institute by step S100a, the tranmitting frequency according to wireless signal
The tranmitting frequency for stating wireless signal is given frequency.
Specifically, with step S100.
Step S200a, monitors wireless signal, if being monitored in first receives frequency in first receives frequency
The wireless signal, then be set to actual receives frequency by first receives frequency；If in first receives frequency not
The wireless signal is monitored, then progressively adjusts first receives frequency according to default step-length until monitoring described wireless
Signal, and will monitor that the receives frequency of the wireless signal is set to actual receives frequency.
Specifically, with step S200.
Step S300a, calculates the difference between the given frequency and the actual receives frequency, and the difference is true
It is set to carrier wave frequency deviation.
Specifically, with step S300.
Step S400a, the carrier wave generation parameter of the phaselocked loop is adjusted according to the carrier wave frequency deviation, to adjust the lock phase
The carrier frequency that ring is produced.
Specifically, by described carrier wave frequency deviation, adjusting the carrier wave generation parameter of the phaselocked loop, including adjust the lock
Frequency dividing ratio of phase ring etc., to reach the purpose of the carrier frequency that adjustment phaselocked loop is produced.Adjust the carrier wave generation of the phaselocked loop
Parameter, can be used for solving the skew of the caused generation carrier frequency of a variety of causes such as temperature.
In the present embodiment, by using the simulation oscillating circuit of high-precision simulation oscillating circuit correction high-quality with defeated
The reference clock for going out, so that the method for producing carrier frequency, can not only reduce the generation cost of carrier frequency, and can meet to carrying
The high accuracy of wave frequency rate, and the demand of high-quality.
Further, wherein in one embodiment, when system multi-channel communicates, each self-correcting is all used per road signal of communication
The carrier frequency of positive generation, the carrier frequency of each self-correcting generation, is to generate ginseng by the carrier wave of each self-correction phase-locked loop
What number was realized.In the multichannel communication multiple telecommunication, the carrier wave generation parameter of the phaselocked loop of the different correction of all each self-generating that communicated per road can
So that multichannel communication multiple telecommunication Zhong Mei roads signal can be received accurately, the reception essence of the carrier frequency of multiplex communication is improved
Degree.
Fig. 3 is the structural representation of the wireless communication carriers frequency correction system without crystal oscillator of one embodiment, such as Fig. 3 institutes
The wireless communication carriers frequency correction system without crystal oscillator for showing includes：
First receives frequency transmitter module 100, for the tranmitting frequency according to wireless signal by the carrier frequency without crystal oscillator
The first receives frequency is adjusted to, the tranmitting frequency of the wireless signal is given frequency.Including systematic error acquiring unit, for obtaining
Take the systematic error E of the carrier frequency without crystal oscillator；First receives frequency adjustment unit, for according to the load without crystal oscillator
The systematic error E of the wave frequency rate, and given frequency F of the wireless signal, the first receives frequency is adjusted to by the carrier frequency without crystal oscillator
F1, and F1 ∈ (F-E, F+E).
Actual receives frequency adjusting module 200, for monitoring wireless signal in first receives frequency, if described the
The wireless signal is monitored in one receives frequency, then first receives frequency is set to actual receives frequency；If institute
State and the wireless signal is not monitored in the first receives frequency, then progressively adjust first receives frequency according to default step-length
Until monitoring the wireless signal, and will monitor that the receives frequency of the wireless signal is set to actual receives frequency.Bag
Fixed step size adjustment unit is included, for adjusting first receives frequency according to default fixed step size MS until monitoring described
Wireless signal, and | MS |<Fe/2, wherein fe are maximum acceptable frequency deviation when demodulating the wireless signal.Also include variable step
Adjustment unit long, for adjusting first receives frequency according to default variable step size VS until monitoring the wireless communication
Number, and described | VS |=n* (fe/2), wherein fe are maximum acceptable frequency deviation when demodulating the wireless signal, n is more than 1
Random number.Also include monitoring duration unit, for progressively adjusting first receives frequency according to default step-length, and in adjustment
The wireless signal is monitored according to default monitoring duration on every synchronizing frequency afterwards, until monitoring the wireless signal.
Carrier wave frequency deviation calculates module 300, for calculating the difference between the given frequency and the actual receives frequency,
And the difference is defined as carrier wave frequency deviation.
Carrier frequency adjustment module 400, for adjusting the carrier frequency without crystal oscillator according to the carrier wave frequency deviation.
In the present embodiment, carrier frequency is adjusted to the first receives frequency and monitors nothing by the given frequency according to wireless signal
Line signal, if not monitoring the wireless signal in first receives frequency, according to default step-length is progressively adjusted
First receives frequency is until detect wireless signal, the frequency setting that will receive wireless signal is actual receives frequency, is passed through
The frequency-splitting between actual receives frequency and the given frequency of wireless signal is calculated, it is described using described frequency-splitting adjustment
The carrier frequency that passive crystal oscillator is produced.By the correction to the carrier frequency without crystal oscillator, can reduce produce carrier frequency into
This, and the requirement to the high accuracy and high-quality of carrier frequency can be met.
In the present embodiment, when cannot monitor wireless signal in the first receives frequency, progressively adjusted using fixed step size
Whole first receives frequency, until the wireless signal is monitored, using the adjustment mode of fixed step size, can be with simpler
Easily monitor wireless signal.
In the present embodiment, when cannot monitor wireless signal in the first receives frequency, progressively adjusted using variable step size
Whole first receives frequency, until the wireless signal is monitored, using the adjustment mode of variable step size, can be quicker
Monitor wireless signal.
In the present embodiment, while the first receives frequency is progressively adjusted, all set certain in every step receives frequency
Monitoring duration, monitoring duration in monitor less than wireless signal after, then carry out next step carrier frequency adjustment, the setting
The mode for monitoring duration can improve the success rate for monitoring wireless signal.
Fig. 4 is the structural representation of the wireless communication carriers frequency correction system without crystal oscillator of another embodiment, such as Fig. 4
The shown wireless communication carriers frequency correction system without crystal oscillator includes：
It is described to include that simulation is vibrated without crystal oscillator carrier frequency generation module 90 including without crystal oscillator carrier frequency generation module 90
Circuit unit, for simulating oscillating circuit to produce reference clock using the first simulation oscillating circuit correction second, wherein, it is described
First simulation oscillating circuit meets default frequency range, and the second simulation oscillating circuit meets default phase and makes an uproar scope；Ginseng
Clock output unit is examined, for reference clock input phaselocked loop to be produced into carrier frequency.
First receives frequency transmitter module 100, for the tranmitting frequency according to wireless signal by the carrier frequency without crystal oscillator
The first receives frequency is adjusted to, the tranmitting frequency of the wireless signal is given frequency.
Actual receives frequency adjusting module 200, for monitoring wireless signal in first receives frequency, if described the
The wireless signal is monitored in one receives frequency, then first receives frequency is set to actual receives frequency；If institute
State and the wireless signal is not monitored in the first receives frequency, then progressively adjust first receives frequency according to default step-length
Until monitoring the wireless signal, and will monitor that the receives frequency of the wireless signal is set to actual receives frequency.
Carrier wave frequency deviation calculates module 300, for calculating the difference between the given frequency and the actual receives frequency,
And the difference is defined as carrier wave frequency deviation.
Carrier frequency adjustment module 400, for adjusting the carrier frequency without crystal oscillator according to the carrier wave frequency deviation.Including
Phaselocked loop adjustment unit, the carrier wave generation parameter for adjusting the phaselocked loop according to the carrier wave frequency deviation, to adjust the lock
The carrier frequency that phase ring is produced.
In the present embodiment, by using the simulation oscillating circuit of high-precision simulation oscillating circuit correction high-quality with defeated
The reference clock for going out, so that the method for producing carrier frequency, can not only reduce the generation cost of carrier frequency, and can meet to carrying
The high accuracy of wave frequency rate, and the demand of high-quality.
Fig. 5 is the structural representation of the wireless communication carriers frequency correction system without crystal oscillator of further embodiment, such as Fig. 5
The shown wireless communication carriers frequency correction system without crystal oscillator includes：
High-precision oscillating source 01, the oscillator signal of default frequency accuracy requirement is met for producing.
High-quality oscillation source 02, meets default phase and makes an uproar than desired oscillator signal for generation.
Phase-locked loop pll 03, the carrier wave for producing frequency using reference clock believes frequency.
Simulation receiving circuit 04, wireless signal is received using antenna.
Band appraising frequency bias demodulator 05, calculates for demodulating the signal that simulation receiving circuit 04 is received, and utilizing
Carrier wave frequency deviation correction phaselocked loop 03.
In the present embodiment, carrier frequency is adjusted to the first receives frequency and monitors nothing by the given frequency according to wireless signal
Line signal, if not monitoring the wireless signal in first receives frequency, according to default step-length is progressively adjusted
First receives frequency is until detect wireless signal, the frequency setting that will receive wireless signal is actual receives frequency, is passed through
The frequency-splitting between actual receives frequency and the given frequency of wireless signal is calculated, it is described using described frequency-splitting adjustment
The carrier frequency that passive crystal oscillator is produced.By the correction to the carrier frequency without crystal oscillator, can reduce produce carrier frequency into
This, and the requirement to the high accuracy and high-quality of carrier frequency can be met.And by using high-precision simulation oscillating circuit school
Reference clock of the simulation oscillating circuit of positive high-quality to export, so that the method for producing carrier frequency, can not only reduce carrier wave
The generation cost of frequency, and the demand of high accuracy and high-quality to carrier frequency can be met.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses several embodiments of the invention, and its description is more specific and detailed, but simultaneously
Can not therefore be construed as limiting the scope of the patent.It should be pointed out that coming for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (14)
1. a kind of wireless communication carriers frequency calibrating method without crystal oscillator, it is characterised in that methods described includes：
Carrier frequency without crystal oscillator is adjusted to the first receives frequency, the hair of the wireless signal by the tranmitting frequency according to wireless signal
Radio frequency rate is given frequency；
Wireless signal is monitored in first receives frequency, if monitoring the wireless signal in first receives frequency,
First receives frequency is then set to actual receives frequency；If not monitored in first receives frequency described wireless
Signal, then progressively adjust first receives frequency until monitoring the wireless signal according to default step-length, and will monitoring
Receives frequency to the wireless signal is set to actual receives frequency；
The difference between the given frequency and the actual receives frequency is calculated, and the difference is defined as carrier wave frequency deviation；
The carrier frequency without crystal oscillator is adjusted according to the carrier wave frequency deviation.
2. the wireless communication carriers frequency calibrating method without crystal oscillator according to claim 1, it is characterised in that described without crystalline substance
The carrier frequency shaken, including：
Oscillating circuit is simulated to produce reference clock using the first simulation oscillating circuit correction second, wherein, first simulation
Oscillating circuit meets default frequency range, and the second simulation oscillating circuit meets default phase and makes an uproar scope；
Reference clock input phaselocked loop is produced into carrier frequency.
3. the wireless communication carriers frequency calibrating method without crystal oscillator according to claim 1, it is characterised in that the basis
Carrier frequency without crystal oscillator is adjusted to the first receives frequency by the tranmitting frequency of wireless signal, including：
Obtain the systematic error E of the carrier frequency without crystal oscillator；
The given frequency F of systematic error E and the wireless signal according to the carrier frequency without crystal oscillator, by the load without crystal oscillator
Wave frequency rate, is adjusted to the first receives frequency F1, and F1 ∈ (F-E, F+E).
4. the wireless communication carriers frequency calibrating method without crystal oscillator according to claim 1, it is characterised in that it is described according to
Default step-length progressively adjusts first receives frequency until monitoring the wireless signal, including：
First receives frequency is adjusted according to default fixed step size MS until monitoring the wireless signal, and | MS |<fe/
2, wherein fe are maximum acceptable frequency deviation when demodulating the wireless signal.
5. the wireless communication carriers frequency calibrating method without crystal oscillator according to claim 1, it is characterised in that it is described according to
Default step-length progressively adjusts first receives frequency until monitoring the wireless signal, also includes：
First receives frequency is adjusted according to default variable step size VS until monitoring the wireless signal, and described | VS |
=n* (fe/2), wherein fe are maximum acceptable frequency deviation when demodulating the wireless signal, and n is the random number more than 1.
6. the wireless communication carriers frequency calibrating method without crystal oscillator according to claim 1, it is characterised in that it is described according to
Default step-length progressively adjusts first receives frequency until monitoring the wireless signal, also includes：
First receives frequency is progressively adjusted according to default step-length, and according to default prison on every synchronizing frequency after the adjustment
Survey duration and monitor the wireless signal, until monitoring the wireless signal.
7. the wireless communication carriers frequency calibrating method without crystal oscillator according to claim 2, it is characterised in that the basis
The carrier wave frequency deviation adjusts the carrier frequency without crystal oscillator, including：
The carrier wave generation parameter of the phaselocked loop is adjusted according to the carrier wave frequency deviation, to adjust the carrier frequency that the phaselocked loop is produced
Rate.
8. a kind of wireless communication carriers frequency correction system without crystal oscillator, it is characterised in that including：
First receives frequency transmitter module, first is adjusted to for the tranmitting frequency according to wireless signal by the carrier frequency without crystal oscillator
Receives frequency, the tranmitting frequency of the wireless signal is given frequency；
Actual receives frequency adjusting module, for monitoring wireless signal in first receives frequency, if being received described first
The wireless signal is monitored in frequency, then first receives frequency is set to actual receives frequency；If described first
The wireless signal is not monitored in receives frequency, then progressively adjusts first receives frequency according to default step-length until prison
The wireless signal is measured, and will monitor that the receives frequency of the wireless signal is set to actual receives frequency；
Carrier wave frequency deviation calculates module, for calculating the difference between the given frequency and the actual receives frequency, and by institute
State difference and be defined as carrier wave frequency deviation；
Carrier frequency adjustment module, for adjusting the carrier frequency without crystal oscillator according to the carrier wave frequency deviation.
9. the wireless communication carriers frequency correction system without crystal oscillator according to claim 8, it is characterised in that including without crystalline substance
Carrier frequency of shaking generation module, it is described to include without crystal oscillator carrier frequency generation module：
Simulation oscillation circuit unit, when being referred to producing for simulating oscillating circuit using the first simulation oscillating circuit correction second
Clock, wherein, the first simulation oscillating circuit meets default frequency range, and the second simulation oscillating circuit meets default
Mutually make an uproar scope；
Reference clock output unit, for reference clock input phaselocked loop to be produced into carrier frequency.
10. the wireless communication carriers frequency correction system without crystal oscillator according to claim 8, it is characterised in that described
One receives frequency transmitter module, including：
Systematic error acquiring unit, the systematic error E for obtaining the carrier frequency without crystal oscillator；
First receives frequency adjustment unit, for systematic error E and the wireless communication according to the carrier frequency without crystal oscillator
Number given frequency F, the carrier frequency without crystal oscillator is adjusted to the first receives frequency F1, and F1 ∈ (F-E, F+E).
The 11. wireless communication carriers frequency correction systems without crystal oscillator according to claim 8, it is characterised in that the reality
Border receives frequency adjusting module, including：
Fixed step size adjustment unit, for adjusting first receives frequency according to default fixed step size MS until monitoring institute
State wireless signal, and | MS |<Fe/2, wherein fe are maximum acceptable frequency deviation when demodulating the wireless signal.
The 12. wireless communication carriers frequency correction systems without crystal oscillator according to claim 8, it is characterised in that the reality
Border receives frequency adjusting module, also includes：
Variable step size adjustment unit, for adjusting first receives frequency according to default variable step size VS until monitoring institute
Wireless signal is stated, and described | VS |=n* (fe/2), wherein fe are maximum acceptable frequency deviation when demodulating the wireless signal, n
It is the random number more than 1.
The 13. wireless communication carriers frequency correction systems without crystal oscillator according to claim 8, it is characterised in that the reality
Border receives frequency adjusting module, also includes：
Monitoring duration unit, for progressively adjusting first receives frequency, and often step after the adjustment according to default step-length
The wireless signal is monitored according to default monitoring duration in frequency, until monitoring the wireless signal.
The 14. wireless communication carriers frequency correction systems without crystal oscillator according to claim 9, it is characterised in that the load
Wave frequency rate, adjusting module, including：
Phaselocked loop adjustment unit, the carrier wave generation parameter for adjusting the phaselocked loop according to the carrier wave frequency deviation, to adjust
State the carrier frequency of phaselocked loop generation.
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| CN109039574A (en) * | 2018-08-21 | 2018-12-18 | 维沃移动通信有限公司 | A kind of method and its terminal device reducing frequency deviation |
| CN117353833A (en) * | 2023-09-22 | 2024-01-05 | 恩平市天行电子科技有限公司 | Wireless signal receiving method and related device based on interference detection |
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| CN106789785B (en) | 2019-07-02 |
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