CN104540155B - A kind of base station frequency method of adjustment and device - Google Patents
A kind of base station frequency method of adjustment and device Download PDFInfo
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- CN104540155B CN104540155B CN201410779394.5A CN201410779394A CN104540155B CN 104540155 B CN104540155 B CN 104540155B CN 201410779394 A CN201410779394 A CN 201410779394A CN 104540155 B CN104540155 B CN 104540155B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The present invention provides a kind of base station frequency method of adjustment and devices, wherein the method includes：Obtain original local frequency；The original local frequency is adjusted, target local frequency is obtained；Digital intermediate frequency frequency is obtained according to the target local frequency, center of housing estate frequency and fixed intermediate frequency frequency；Base station frequency is adjusted according to the target local frequency and the digital intermediate frequency frequency.Technical solution of the present invention improves system performance, reduces cost of implementation, is not only restricted to the frequency accuracy of local oscillator chip, has unified the configuration method and configuration precision of base station frequency.
Description
Technical field
The present invention relates to fields of communication technology, more particularly to a kind of base station frequency method of adjustment and device.
Background technique
In current wireless system applications, the wireless system applications of many industries possess own frequency range, radio frequency work
Make frequency range different from public mobile communication frequency range.In the application band of all conglomeraties, often there is signal and only take up its middle part
Divide the situation of bandwidth resources.Since current BTS hardware platform is limited, can not achieve sometimes while to whole bandwidth ranges
Digital processing is only capable of processing useful signal bandwidth.For these wide-band resources, the side of adjustment RF local oscillator frequency is generallyd use
Method realizes the accurate adjustment of base station frequency, and then realizes the covering of full bandwidth.If but local frequency adjustment is too accurate, i.e. frequency
Rate stepping is too small, will cause the deterioration that local oscillator is mutually made an uproar, to directly deteriorate the performance indicator of Receiver And Transmitter.
In addition the case where whole bandwidth ranges being handled simultaneously for other, is generally realized by adjusting IF frequency
The adjustment of base station frequency.Analog intermediate frequency needs to cover whole bandwidth resources at this time, and signal bandwidth wants much narrower, wide intermediate frequency
Bandwidth can deteriorate the spurious reduction performance of transmitter and the block resistance of receiver.
Existing base station frequency adjusts implementation, according to the realization position in link, be divided into digital shift frequency (scheme 1) and
Shift frequency (scheme 2) two schemes are simulated, typical architecture is as shown in Figure 1.Both hardware structures are identical, including Base-Band Processing, radio frequency
Four processing, local oscillator, external antenna parts.Digital frequency shift schemes are to realize base in baseband processing portion by adjusting numerical frequency
The change for frequency of standing, while local oscillator is fixed frequency；Simulation frequency shift schemes are in Radio frequency Processing Unit, RF Processing Unit by adjusting local oscillator realization
The change of base station frequency, while the numerical frequency of baseband processing portion is fixed frequency.
Existing number frequency shift schemes are relatively narrow there are frequency band adjustable range and the shortcomings that influencing system performance, and simulate shift frequency
There is the shortcomings that system performance degradation in scheme, specific as follows：
Using digital frequency shift schemes, local oscillator is fixed frequency, and frequency is only adjusted in intermediate-frequency bandwidth.Since Current hardware is flat
The limitation of platform supports adjustable frequency range in base station relatively narrow；And need to occupy limited intermediate-frequency bandwidth resource, transmitter can be made miscellaneous
Rejection and the decline of receiver block resistance are dissipated, and then leads to the decline of system performance.
Using simulation frequency shift schemes, numerical frequency is fixed, the disadvantage is that being made due to the exact requirements of base station frequency adjustment stepping
Local frequency stepping is too small, and the too small fractional frequency division that can improve of stepping is spuious, deteriorates local oscillator noise.The phase noise of local oscillator
Deteriorate, the keys such as sensitivity of EVM (Error Vector Magnitude, error vector magnitude) and receiver of transmitter refer to
Mark can also deteriorate, and directly influence the performance of system；And it has higher requirements to local oscillator chip frequency precision index.
Summary of the invention
The present invention provides a kind of base station frequency method of adjustment and device, to solve system performance degradation and to local oscillator chip frequency
The demanding problem of rate precision index.
To solve the above-mentioned problems, the invention discloses a kind of base station frequency methods of adjustment, including：
Obtain original local frequency；
The original local frequency is adjusted, target local frequency is obtained；
Digital intermediate frequency frequency is obtained according to the target local frequency, center of housing estate frequency and fixed intermediate frequency frequency；
Base station frequency is adjusted according to the target local frequency and the digital intermediate frequency frequency.
Preferably, described that the original local frequency is adjusted, target local frequency is obtained, including：
Original frequency division value is obtained according to the original local frequency, voltage controlled oscillator frequency dividing numerical value and phase demodulation frequency；
Target frequency division value is determined according to the original frequency division value；
The target sheet is obtained according to the target frequency division value, voltage controlled oscillator frequency dividing numerical value and the phase demodulation frequency
Vibration frequency.
Preferably, described original according to the original local frequency, voltage controlled oscillator frequency dividing numerical value and phase demodulation frequency acquisition
Frequency division value, including：
According toObtain original frequency division value；
Wherein, fL01For the original local frequency, Div_vco is that the voltage controlled oscillator divides numerical value, FpfdIt is described
Phase demodulation frequency, Divider are the original frequency division value, and N is the integer part of the original frequency division value,It is described original
The fractional part of frequency division value, variables D EN1 are assigned a value of fixed value Fpfd。
Preferably, described to determine target frequency division value from the original frequency division value, including：
By variables D EN1 quantization to default value；
The M difference that the fractional part that the M score of variables D EN1 after obtaining quantization subtracts the original frequency division value obtains
The absolute value of value；Wherein, the M is the integer part of the default value；
Determine score corresponding with absolute value the smallest in the absolute value of the M difference, the corresponding score is true
It is set to the target frequency division value.
Preferably, described to be obtained in number according to the target local frequency, center of housing estate frequency and fixed intermediate frequency frequency
Frequent rate, including
The center of housing estate frequency is subtracted into the target local frequency and then subtracts the fixed intermediate frequency frequency, is obtained
To digital intermediate frequency frequency.
Correspondingly, the invention also discloses a kind of base station frequencies to adjust device, including：
Original local frequency obtains module, for obtaining original local frequency；
Target local frequency obtains module and obtains target local frequency for being adjusted to the original local frequency；
Digital intermediate frequency frequency acquisition module, for according to the target local frequency, center of housing estate frequency and fixed intermediate frequency
Frequency obtains digital intermediate frequency frequency；
Base station frequency adjusts module, is used for according to the target local frequency and the digital intermediate frequency frequency to base station frequency
It is adjusted.
Preferably, the target local frequency obtains module, including：
Original frequency division value acquisition submodule, for according to the original local frequency, voltage controlled oscillator frequency dividing numerical value and mirror
Phase frequency obtains original frequency division value；
Target frequency division value acquisition submodule, for determining target frequency division value according to the original frequency division value；
Target local frequency acquisition submodule, for dividing numerical value according to the target frequency division value, the voltage controlled oscillator
The target local frequency is obtained with the phase demodulation frequency.
Preferably, the original frequency division value acquisition submodule according to
Obtain original frequency division value；
Wherein, fL01For the original local frequency, Div_vco is that the voltage controlled oscillator divides numerical value, FpfdIt is described
Phase demodulation frequency, Divider are the original frequency division value, and N is the integer part of the original frequency division value,It is described original
The fractional part of frequency division value, variables D EN1 are assigned a value of fixed value Fpfd。
Preferably, the target frequency division value acquisition submodule, including：
Quantify subelement, for quantifying the variables D EN1 to default value；
Absolute value obtains subelement, and the M score for obtaining the variables D EN1 after quantifying subtracts the original frequency division value
The obtained absolute value of M difference of fractional part；Wherein, the M is the integer part of the default value；
Target frequency division value determines subelement, corresponding with the smallest absolute value in the absolute value of the M difference for determination
Score, the corresponding score is determined as the target frequency division value.
Preferably, the center of housing estate frequency is subtracted the target local frequency by the digital intermediate frequency frequency acquisition module
And then the fixed intermediate frequency frequency is subtracted, obtain digital intermediate frequency frequency.
Compared with the background art, the present invention includes the following advantages：
Firstly, digital shift frequency and simulation shift frequency two ways are combined, without changing hardware platform, it is only necessary to modify base station frequency
The algorithm of rate adjustment can optimize base station frequency adjustment by upgrading soft firmware, and the exploitation for new product can directly make
With the algorithm, system performance is improved.
Secondly, obtaining original local frequency；Original local frequency is adjusted, target local frequency is obtained, reduces
Stepping requirement to local oscillator chip, local frequency can take larger stepping to inhibit fractional frequency division spuious, to guarantee local oscillator frequency
The phase noise of rate is unaffected, and system performance does not deteriorate because local frequency changes, and the reduction of cost may be implemented.
Again, digital intermediate frequency frequency is obtained according to target local frequency, center of housing estate frequency and fixed intermediate frequency frequency, with mould
Based on quasi- shift frequency, numerical frequency is mainly used for the control of Adjustment precision, so being not take up intermediate-frequency bandwidth substantially, optimizes systematicness
Energy.Since precision is guaranteed by numerical frequency part, the frequency adjustment of higher precision may be implemented, and be no longer limited by local oscillator core
The frequency accuracy of piece.
Finally, base station frequency is adjusted according to target local frequency and digital IF frequency.It can unify base station frequency
The configuration method and configuration precision of rate, are no longer limited by different local oscillator chips.
Detailed description of the invention
Fig. 1 is that base station frequency adjusts configuration diagram in background technique；
Fig. 2 is the flow chart of one of embodiment of the present invention one base station frequency method of adjustment；
Fig. 3 is the configuration diagram of one of embodiment of the present invention two base station frequency method of adjustment；
Fig. 4 is the flow chart of one of embodiment of the present invention two base station frequency method of adjustment；
Fig. 5 is the flow chart of another base station frequency method of adjustment in the embodiment of the present invention two；
Fig. 6 is the flow chart of one of embodiment of the present invention three base station frequency method of adjustment；
Fig. 7 is the structure chart of one of the embodiment of the present invention four base station frequency adjustment device；
Fig. 8 is the structure chart of one of the embodiment of the present invention five base station frequency adjustment device.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
A kind of base station frequency method of adjustment provided by the invention is discussed in detail below by several specific embodiments are enumerated
And device.
Embodiment one
A kind of base station frequency method of adjustment provided in an embodiment of the present invention is discussed in detail.
Referring to Fig. 2, a kind of flow chart of base station frequency method of adjustment in the embodiment of the present invention is shown.
Step 100, original local frequency is obtained.
Original of uncomfortable integer word frequency is obtained according to the center of housing estate frequency and fixed intermediate frequency frequency that are arranged in base station
Vibration frequency.
Step 102, the original local frequency is adjusted, obtains target local frequency.
Firstly, being adjusted to original local frequency, the original frequency division value of original local frequency is obtained, secondly, determining
The how far of frequency division value, obtains target frequency division value, again, according to target frequency division value meter after the original frequency division value distance quantization arrived
Calculation obtains target local frequency.
Step 104, digital intermediate frequency frequency is obtained according to the target local frequency, center of housing estate frequency and fixed intermediate frequency frequency
Rate.
Center of housing estate frequency is subtracted into target local frequency and fixed intermediate frequency frequency obtains digital intermediate frequency frequency.
Step 106, base station frequency is adjusted according to the target local frequency and the digital intermediate frequency frequency.
After obtaining target local frequency and digital IF frequency, it can according to target local frequency and digital IF frequency
Base station frequency is adjusted.The process that base station frequency can be adjusted according to target local frequency and digital IF frequency
Be referred to existing base station frequency adjustment process, the embodiment of the present invention to the process with no restrictions.
In conclusion the technical solution of the embodiment of the present invention, firstly, digital shift frequency and simulation shift frequency two ways are combined,
Without changing hardware platform, it is only necessary to which the algorithm for modifying base station frequency adjustment can optimize base station frequency by upgrading soft firmware
Rate adjustment, the exploitation for new product can directly use the algorithm, improve system performance.
Secondly, obtaining original local frequency；Original local frequency is adjusted, target local frequency is obtained, reduces
Stepping requirement to local oscillator chip, local frequency can take larger stepping to inhibit fractional frequency division spuious, to guarantee local oscillator frequency
The phase noise of rate is unaffected, and system performance does not deteriorate because local frequency changes, and the reduction of cost may be implemented.
Again, digital intermediate frequency frequency is obtained according to target local frequency, center of housing estate frequency and fixed intermediate frequency frequency, with mould
Based on quasi- shift frequency, numerical frequency is mainly used for the control of Adjustment precision, so being not take up intermediate-frequency bandwidth substantially, optimizes systematicness
Energy.Since precision is guaranteed by numerical frequency part, the frequency adjustment of higher precision may be implemented, and be no longer limited by local oscillator core
The frequency accuracy of piece.
Finally, base station frequency is adjusted according to target local frequency and digital IF frequency.It can unify base station frequency
The configuration method and configuration precision of rate, are no longer limited by different local oscillator chips.
Embodiment two
A kind of base station frequency method of adjustment provided in an embodiment of the present invention is discussed in detail.
Referring to Fig. 3, a kind of configuration diagram of base station frequency method of adjustment in the embodiment of the present invention is shown.
The scheme framework of the embodiment of the present invention includes four parts, respectively Base-Band Processing, radio frequency processing, local oscillator and external
Antenna.
Referring to Fig. 4, a kind of flow chart of base station frequency method of adjustment in the embodiment of the present invention is shown.
Step 200, original local frequency is obtained.
Original of uncomfortable integer word frequency is obtained according to the center of housing estate frequency and fixed intermediate frequency frequency that are arranged in base station
Vibration frequency.
For example, according to fLO1=fRF-FIFObtain original local frequency.
Wherein, fLO1For original local frequency, fRFFor center of housing estate frequency, FIFFor fixed intermediate frequency frequency.
Step 202, the original local frequency is adjusted, obtains target local frequency.
Firstly, being adjusted to original local frequency, the original frequency division value of original local frequency is obtained, secondly, determining
The how far of frequency division value, obtains target frequency division value, again, according to target frequency division value meter after the original frequency division value distance quantization arrived
Calculation obtains target local frequency.
Preferably, the step 202 may include：
Step 2021, original point is obtained according to the original local frequency, voltage controlled oscillator frequency dividing numerical value and phase demodulation frequency
Frequency is worth.
For example, can basisObtain original frequency division value.
Wherein, fL01For the original local frequency, it is VCO that Div_vco, which is that the voltage controlled oscillator divides numerical value,
The frequency of (Voltage Controlled Oscillator, voltage controlled oscillator) and the ratio of original local frequency, FpfdFor institute
Phase demodulation frequency is stated, Divider is the original frequency division value, and N is the integer part of the original frequency division value,For the original
The fractional part of beginning frequency division value, variables D EN1 are assigned a value of fixed value Fpfd。
Step 2022, target frequency division value is determined according to the original frequency division value.
Preferably, the step 2022 may include：
Step 1, the variables D EN1 is quantified to default value.
In above-mentioned steps 2021, the value of the variables D EN1 is larger, in step 2022, by variables D EN1 quantization to compared with
Small default value, for example, DEN1=8.
Step 2, the M that the fractional part that the M score of the variables D EN1 after acquisition quantization subtracts original frequency division value obtains is a
The absolute value of difference；Wherein, the M is the integer part of the default value.
The value of M in the M score is equal with default value, e.g., above-mentioned variables D EN1 quantization to 8, then M=8, institute
Stating M score is respectively
Step 3, score corresponding with absolute value the smallest in the absolute value of the M difference is determined, it will be described corresponding
Score is determined as the target frequency division value.
For example, above-mentionedThe absolute value for subtracting the difference that the fractional part of frequency division value obtains is minimum, then willAs target point
Frequency is worth.The absolute value of the difference obtained if there is the fractional part that two scores subtract frequency division value is minimum, then two scores are all
Can be with, such as the score for taking its medium and small is as target frequency division value.
Step 2023, it is obtained according to the target frequency division value, voltage controlled oscillator frequency dividing numerical value and the phase demodulation frequency
The target local frequency.
It can basisRetrospectively calculate, obtain target local oscillator
Frequency, i.e.,
According toObtain target local frequency.
Wherein,For target frequency division value, fLOFor target local frequency.
16 systems can be converted by NUM and DEN, configured into the register of local oscillator chip.
Step 204, digital intermediate frequency frequency is obtained according to the target local frequency, center of housing estate frequency and fixed intermediate frequency frequency
Rate.
Preferably, the step 204 can be：
The center of housing estate frequency is subtracted into the target local frequency and then subtracts the fixed intermediate frequency frequency, is obtained
To digital intermediate frequency frequency.
I.e. according to fNCO=fRF-fLO-FIFObtain digital intermediate frequency frequency fNCO。
By in the register of digital intermediate frequency frequency write-in baseband processing portion, exceed NCO in baseband processing portion
The rejection of data of (Numerically Controlled Oscillator, numerically-controlled oscillator) Adjustment precision.
Step 206, base station frequency is adjusted according to the target local frequency and the digital intermediate frequency frequency.
After obtaining target local frequency and digital IF frequency, it can according to target local frequency and digital IF frequency
Base station frequency is adjusted.The process that base station frequency can be adjusted according to target local frequency and digital IF frequency
Be referred to existing base station frequency adjustment process, the embodiment of the present invention to the process with no restrictions.
Under special circumstances, such as fLO1The VCO lower boundary of local oscillator chip is appeared in, decision algorithm needs are modified at this time
JudgementEight numbers and fractional partThe order of magnitude of difference, takes and is greater thanNumerical value and away from
From nearest data.Conversely, if fLO1The coboundary VCO for appearing in local oscillator chip, takes and is less thanNumerical value and apart from nearest
Data.
If DEN1 is become smaller equal to 1, the local oscillator chip of fractional frequency division can use the local oscillator chip of integral frequency divisioil at this time
Replacement, greatly reduces the requirement to local oscillator chip, can reduce hardware cost.
For example, fL01=2381.44MHz, FpfdN=77, NUM1=is calculated in=30720kHz, Div_vco=1
16000, DEN1=30720, if fixed DEN=8, NUM=4 is obtained by judgement, N=77 integer part is constant, calculates
To fLO=2380.8MHz.Meanwhile fL01_fLO=2381.44-2380.8=0.64MHz is configured to obtain by digital NCO.
The implementation process of technical solution in the embodiment of the present invention can also be reduced to shown in Fig. 5.First according to cell frequency,
It calculates original local frequency, adjusts original local frequency when simulating shift frequency, then calculate inherent spurious frequency deviation, when digital shift frequency adjusts base
The digital NCO of tape handling part.Whole process is realized in two steps, can directly reduce the stepping accuracy of original local frequency, real
Base station frequency adjustment in existing ultratvide frequency band, and system performance can be made unaffected.
To simulate based on shift frequency, numerical frequency is mainly used for the control of Adjustment precision for technical solution in the embodiment of the present invention
System, so being not take up intermediate-frequency bandwidth substantially, optimizes system performance.
The frequency distribution portion of technical solution in the embodiment of the present invention can carry out flexible according to specific chip performance
Distribution.Frequency distribution follows the principle for not reducing local oscillation signal performance indicator, combines in base station frequency adjustment to simulate frequency
Principle based on rate adjustment, supplemented by numerical frequency adjustment.
In conclusion the technical solution of the embodiment of the present invention, firstly, digital shift frequency and simulation shift frequency two ways are combined,
Without changing hardware platform, it is only necessary to which the algorithm for modifying base station frequency adjustment can optimize base station frequency by upgrading soft firmware
Rate adjustment, the exploitation for new product can directly use the algorithm, improve system performance.
Secondly, obtaining original local frequency；Original local frequency is adjusted, target local frequency is obtained, reduces
Stepping requirement to local oscillator chip, local frequency can take larger stepping to inhibit fractional frequency division spuious, to guarantee local oscillator frequency
The phase noise of rate is unaffected, and system performance does not deteriorate because local frequency changes, and the reduction of cost may be implemented.
Again, digital intermediate frequency frequency is obtained according to target local frequency, center of housing estate frequency and fixed intermediate frequency frequency, with mould
Based on quasi- shift frequency, numerical frequency is mainly used for the control of Adjustment precision, so being not take up intermediate-frequency bandwidth substantially, optimizes systematicness
Energy.Since precision is guaranteed by numerical frequency part, the frequency adjustment of higher precision may be implemented, and be no longer limited by local oscillator core
The frequency accuracy of piece.
Finally, base station frequency is adjusted according to target local frequency and digital IF frequency.It can unify base station frequency
The configuration method and configuration precision of rate, are no longer limited by different local oscillator chips.
Embodiment three
A kind of base station frequency method of adjustment provided in an embodiment of the present invention is discussed in detail.
Referring to Fig. 6, a kind of flow chart of base station frequency method of adjustment in the embodiment of the present invention is shown.
Step 300, the original local frequency of uncomfortable integer word frequency is calculated.
According to fLO1=fRF-FIFObtain original local frequency.
Wherein, fLO1For original local frequency, fRFFor center of housing estate frequency, FIFFor fixed intermediate frequency frequency.
Step 302, the original frequency division value of original local frequency is obtained.
According toObtain original frequency division value.
Wherein, fL01For the original local frequency, it is the frequency of VCO that Div_vco, which is that the voltage controlled oscillator divides numerical value,
The ratio of rate and original local frequency, FpfdFor the phase demodulation frequency, Divider is the original frequency division value, and N is described original
The integer part of frequency division value, variables D EN1 are assigned a value of fixed value Fpfd,For the fractional part of the original frequency division value.
Step 304, the how far of original frequency division value distance objective frequency division value is adjudicated.
Need to modify drive software part in specific implementation, drive software increases decision algorithm and realizes code.Fixed N and
Div_vco, by DEN1 quantization to compared with fractional value, such as DEN1=8, judgement Eight scores with
The order of magnitude of difference.
Step 306, the target frequency division value of original local frequency is determined.
Which absolute value is minimum in above-mentioned steps 304, just being assigned to again and again by this corresponding eight scoresWithIndicate this new numerical value as target frequency division value.
Step 308, target local frequency is calculated according to target frequency division value.
It can basisRetrospectively calculate, obtain target local oscillator
Frequency.
Step 310, digital intermediate frequency frequency is determined.
According to fNCo=fRF-fLO-FIFDigital intermediate frequency frequency is calculated, the register of baseband processing portion is written.Beyond base
The rejection of data of NCO Adjustment precision in tape handling part.
Step 312, base station frequency adjustment is completed according to target local frequency and digital IF frequency.
In conclusion the technical solution of the embodiment of the present invention, firstly, digital shift frequency and simulation shift frequency two ways are combined,
Without changing hardware platform, it is only necessary to which the algorithm for modifying base station frequency adjustment can optimize base station frequency by upgrading soft firmware
Rate adjustment, the exploitation for new product can directly use the algorithm, improve system performance.
Secondly, obtaining original local frequency；Original local frequency is adjusted, target local frequency is obtained, reduces
Stepping requirement to local oscillator chip, local frequency can take larger stepping to inhibit fractional frequency division spuious, to guarantee local oscillator frequency
The phase noise of rate is unaffected, and system performance does not deteriorate because local frequency changes, and the reduction of cost may be implemented.
Again, digital intermediate frequency frequency is obtained according to target local frequency, center of housing estate frequency and fixed intermediate frequency frequency, with mould
Based on quasi- shift frequency, numerical frequency is mainly used for the control of Adjustment precision, so being not take up intermediate-frequency bandwidth substantially, optimizes systematicness
Energy.Since precision is guaranteed by numerical frequency part, the frequency adjustment of higher precision may be implemented, and be no longer limited by local oscillator core
The frequency accuracy of piece.
Finally, base station frequency is adjusted according to target local frequency and digital IF frequency.It can unify base station frequency
The configuration method and configuration precision of rate, are no longer limited by different local oscillator chips.
Example IV
A kind of base station frequency adjustment device provided in an embodiment of the present invention is discussed in detail.
Referring to Fig. 7, a kind of structure chart of base station frequency adjustment device in the embodiment of the present invention is shown.
The apparatus may include：Original local frequency obtains module 400, and target local frequency obtains module 402, number
IF frequency obtains module 404, and base station frequency adjusts module 406.
The relationship between the function and each module of each module is described in detail below.
Original local frequency obtains module 400, for obtaining original local frequency.
Target local frequency obtains module 402, for being adjusted to the original local frequency, obtains target local oscillator frequency
Rate.
Digital intermediate frequency frequency acquisition module 404, for according in the target local frequency, center of housing estate frequency and fixation
Frequent rate obtains digital intermediate frequency frequency.
Base station frequency adjusts module 406, is used for according to the target local frequency and the digital intermediate frequency frequency to base station
Frequency is adjusted.
In conclusion the technical solution of the embodiment of the present invention, firstly, digital shift frequency and simulation shift frequency two ways are combined,
Without changing hardware platform, it is only necessary to which the algorithm for modifying base station frequency adjustment can optimize base station frequency by upgrading soft firmware
Rate adjustment, the exploitation for new product can directly use the algorithm, improve system performance.
Secondly, obtaining original local frequency；Original local frequency is adjusted, target local frequency is obtained, reduces
Stepping requirement to local oscillator chip, local frequency can take larger stepping to inhibit fractional frequency division spuious, to guarantee local oscillator frequency
The phase noise of rate is unaffected, and system performance does not deteriorate because local frequency changes, and the reduction of cost may be implemented.
Again, digital intermediate frequency frequency is obtained according to target local frequency, center of housing estate frequency and fixed intermediate frequency frequency, with mould
Based on quasi- shift frequency, numerical frequency is mainly used for the control of Adjustment precision, so being not take up intermediate-frequency bandwidth substantially, optimizes systematicness
Energy.Since precision is guaranteed by numerical frequency part, the frequency adjustment of higher precision may be implemented, and be no longer limited by local oscillator core
The frequency accuracy of piece.
Finally, base station frequency is adjusted according to target local frequency and digital IF frequency.It can unify base station frequency
The configuration method and configuration precision of rate, are no longer limited by different local oscillator chips.
Embodiment five
A kind of base station frequency adjustment device provided in an embodiment of the present invention is discussed in detail.
Referring to Fig. 8, a kind of structure chart of base station frequency adjustment device in the embodiment of the present invention is shown.
The apparatus may include：Original local frequency obtains module 500, and target local frequency obtains module 502, number
IF frequency obtains module 504, and base station frequency adjusts module 506.
Wherein, the target local frequency obtains module 502, may include：Original frequency division value acquisition submodule 5021, mesh
Mark frequency division value acquisition submodule 5022, target local frequency acquisition submodule 5023.
The target frequency division value acquisition submodule 5022 may include：
Quantify subelement 50221, absolute value obtains subelement 50222, and target frequency division value determines subelement 50223.
Each module, each submodule, the function of each subelement and each module, each submodule, each is described in detail below
Relationship between subelement.
Original local frequency obtains module 500, for obtaining original local frequency.
Target local frequency obtains module 502, for being adjusted to the original local frequency, obtains target local oscillator frequency
Rate.
Preferably, the target local frequency obtains module 502, may include：
Original frequency division value acquisition submodule 5021, for dividing numerical value according to the original local frequency, voltage controlled oscillator
Original frequency division value is obtained with phase demodulation frequency.
Preferably, the original frequency division value acquisition submodule 5021 can basis
Obtain original frequency division value；
Wherein, fL01For the original local frequency, Div_vco is that the voltage controlled oscillator divides numerical value, FpfdIt is described
Phase demodulation frequency, Divider are the original frequency division value, and N is the integer part of the original frequency division value,It is described original
The fractional part of frequency division value, variables D EN1 are assigned a value of fixed value Fpfd。
Target frequency division value acquisition submodule 5022, for determining target frequency division value according to the original frequency division value.
Preferably, the target frequency division value acquisition submodule 5022 may include：
Quantify subelement 50221, for quantifying the variables D EN1 to default value.
Absolute value obtains subelement 50222, and the M score for obtaining the variables D EN1 after quantifying subtracts the frequency division value
The obtained absolute value of M difference of fractional part；Wherein, the M is the integer part of the default value.
Target frequency division value determines subelement 50223, for the smallest absolute value in the determining absolute value with the M difference
The corresponding score is determined as the target frequency division value by corresponding score.
Target local frequency acquisition submodule 5023, for being divided according to the target frequency division value, the voltage controlled oscillator
Numerical value and the phase demodulation frequency obtain the target local frequency.
Digital intermediate frequency frequency acquisition module 504, for according in the target local frequency, center of housing estate frequency and fixation
Frequent rate obtains digital intermediate frequency frequency.
Preferably, the center of housing estate frequency is subtracted the target local oscillator by the digital intermediate frequency frequency acquisition module 504
Frequency and then the fixed intermediate frequency frequency is subtracted, obtains digital intermediate frequency frequency.
Base station frequency adjusts module 506, is used for according to the target local frequency and the digital intermediate frequency frequency to base station
Frequency is adjusted.
In conclusion the technical solution of the embodiment of the present invention, firstly, digital shift frequency and simulation shift frequency two ways are combined,
Without changing hardware platform, it is only necessary to which the algorithm for modifying base station frequency adjustment can optimize base station frequency by upgrading soft firmware
Rate adjustment, the exploitation for new product can directly use the algorithm, improve system performance.
Secondly, obtaining original local frequency；Original local frequency is adjusted, target local frequency is obtained, reduces
Stepping requirement to local oscillator chip, local frequency can take larger stepping to inhibit fractional frequency division spuious, to guarantee local oscillator frequency
The phase noise of rate is unaffected, and system performance does not deteriorate because local frequency changes, and the reduction of cost may be implemented.
Again, digital intermediate frequency frequency is obtained according to target local frequency, center of housing estate frequency and fixed intermediate frequency frequency, with mould
Based on quasi- shift frequency, numerical frequency is mainly used for the control of Adjustment precision, so being not take up intermediate-frequency bandwidth substantially, optimizes systematicness
Energy.Since precision is guaranteed by numerical frequency part, the frequency adjustment of higher precision may be implemented, and be no longer limited by local oscillator core
The frequency accuracy of piece.
Finally, base station frequency is adjusted according to target local frequency and digital IF frequency.It can unify base station frequency
The configuration method and configuration precision of rate, are no longer limited by different local oscillator chips.
For device embodiment, since it is basically similar to the method embodiment, related so being described relatively simple
Place illustrates referring to the part of embodiment of the method.
All the embodiments in this specification are described in a progressive manner, the highlights of each of the examples are with
The difference of other embodiments, the same or similar parts between the embodiments can be referred to each other.
It is provided for the embodiments of the invention a kind of base station frequency method of adjustment and device above, is described in detail,
Used herein a specific example illustrates the principle and implementation of the invention, and the explanation of above embodiments is only used
In facilitating the understanding of the method and its core concept of the invention；At the same time, for those skilled in the art, according to the present invention
Thought, there will be changes in the specific implementation manner and application range, in conclusion the content of the present specification should not be construed as
Limitation of the present invention.
Claims (8)
1. a kind of base station frequency method of adjustment, which is characterized in that including：
Obtain original local frequency；
The original local frequency is adjusted, target local frequency is obtained, including：According to the original local frequency, pressure
It controls oscillator frequency dividing numerical value and phase demodulation frequency obtains original frequency division value；Target frequency division value is determined according to the original frequency division value；
The target local frequency is obtained according to the target frequency division value, voltage controlled oscillator frequency dividing numerical value and the phase demodulation frequency；
Digital intermediate frequency frequency is obtained according to the target local frequency, center of housing estate frequency and fixed intermediate frequency frequency；
Base station frequency is adjusted according to the target local frequency and the digital intermediate frequency frequency.
2. the method according to claim 1, wherein described according to the original local frequency, voltage controlled oscillator
It divides numerical value and phase demodulation frequency obtains original frequency division value, including：
According toObtain original frequency division value；
Wherein, fL01For the original local frequency, Div_vco is that the voltage controlled oscillator divides numerical value, FpfdFor the phase demodulation
Frequency, Divider are the original frequency division value, and N is the integer part of the original frequency division value,For the original frequency dividing
The fractional part of value, variables D EN1 are assigned a value of fixed value Fpfd。
3. according to the method described in claim 2, it is characterized in that, described determine that target is divided from the original frequency division value
Value, including：
By variables D EN1 quantization to default value；
The M difference that the fractional part that the M score of variables D EN1 after obtaining quantization subtracts the original frequency division value obtains
Absolute value；Wherein, the M is the integer part of the default value；
It determines score corresponding with absolute value the smallest in the absolute value of the M difference, the corresponding score is determined as
The target frequency division value.
4. the method according to claim 1, wherein described according to the target local frequency, center of housing estate frequency
Rate and fixed intermediate frequency frequency obtain digital intermediate frequency frequency, including
The center of housing estate frequency is subtracted into the target local frequency and then subtracts the fixed intermediate frequency frequency, is counted
Word IF frequency.
5. a kind of base station frequency adjusts device, which is characterized in that including：
Original local frequency obtains module, for obtaining original local frequency；
Target local frequency obtains module, for being adjusted to the original local frequency, obtains target local frequency, wraps
It includes：Original frequency division value acquisition submodule, for according to the original local frequency, voltage controlled oscillator frequency dividing numerical value and phase demodulation frequency
Obtain original frequency division value；Target frequency division value acquisition submodule, for determining target frequency division value according to the original frequency division value；Mesh
Sample vibration frequency acquisition submodule, for according to the target frequency division value, voltage controlled oscillator frequency dividing numerical value and the phase demodulation
Frequency obtains the target local frequency；
Digital intermediate frequency frequency acquisition module, for according to the target local frequency, center of housing estate frequency and fixed intermediate frequency frequency
Obtain digital intermediate frequency frequency；
Base station frequency adjusts module, for being carried out according to the target local frequency and the digital intermediate frequency frequency to base station frequency
Adjustment.
6. device according to claim 5, which is characterized in that the original frequency division value acquisition submodule according toObtain original frequency division value；
Wherein, fL01For the original local frequency, Div_vco is that the voltage controlled oscillator divides numerical value, FpfdFor the phase demodulation
Frequency, Divider are the original frequency division value, and N is the integer part of the original frequency division value,For the original frequency dividing
The fractional part of value, variables D EN1 are assigned a value of fixed value Fpfd。
7. device according to claim 6, which is characterized in that the target frequency division value acquisition submodule, including：
Quantify subelement, for quantifying the variables D EN1 to default value；
Absolute value obtains subelement, and the M score for obtaining the variables D EN1 after quantifying subtracts the small of the original frequency division value
The absolute value for the M difference that number part obtains；Wherein, the M is the integer part of the default value；
Target frequency division value determines subelement, for determination and corresponding point of the smallest absolute value in the absolute value of the M difference
Number, is determined as the target frequency division value for the corresponding score.
8. device according to claim 5, which is characterized in that the digital intermediate frequency frequency acquisition module will be in the cell
Frequency of heart subtracts the target local frequency and then subtracts the fixed intermediate frequency frequency, obtains digital intermediate frequency frequency.
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| CN102457991A (en) * | 2010-10-14 | 2012-05-16 | 中国移动通信集团公司 | Base station equipment |
| CN102457858A (en) * | 2010-10-19 | 2012-05-16 | 中国移动通信集团公司 | Base station equipment |
| CN102970030A (en) * | 2012-11-01 | 2013-03-13 | 南京国睿安泰信科技股份有限公司 | System for achieving spectrum analyzer down-conversion by using broadband local oscillator and high frequency phase discrimination |
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| CN102457991A (en) * | 2010-10-14 | 2012-05-16 | 中国移动通信集团公司 | Base station equipment |
| CN102457858A (en) * | 2010-10-19 | 2012-05-16 | 中国移动通信集团公司 | Base station equipment |
| CN102970030A (en) * | 2012-11-01 | 2013-03-13 | 南京国睿安泰信科技股份有限公司 | System for achieving spectrum analyzer down-conversion by using broadband local oscillator and high frequency phase discrimination |
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