CN104540155A - Base station frequency regulation method and device - Google Patents

Abstract

The invention provides a base station frequency regulation method and device. The method includes the steps of obtaining an original local frequency, regulating the original local frequency to obtain a target local frequency, obtaining a digital intermediate frequency according to the target local frequency, a cell center frequency and a fixed intermediate frequency, and regulating a base station frequency according to the target local frequency and the digital intermediate frequency. According to the technical scheme, the system performance is improved, the achievement cost is reduced, the base station frequency is not limited by the frequency accuracy of a local oscillator chip, and configuration methods and configuration accuracy of the base station frequency are unified.

Description

A kind of base station frequency method of adjustment and device

Technical field

The present invention relates to communication technical field, particularly relate to a kind of base station frequency method of adjustment and device.

Background technology

In current wireless system applications, the wireless system applications of many industries has own frequency range, and its radio frequency operation frequency range is different from public mobile communication frequency range.In the application band of all conglomeraties, often occur that signal only takies the situation of wherein fractional bandwidth resource.Because current BTS hardware platform is limited, sometimes can not realize, simultaneously to the digital processing of whole bandwidth range, only processing useful signal bandwidth.For these wide-band resources, usually adopt the method for adjustment radio-frequency (RF) local oscillator frequency to realize the accurate adjustment of base station frequency, and then realize the covering of full bandwidth.If but local frequency adjustment is too accurate, and namely frequency step is too little, can cause the deterioration that local oscillator is made an uproar mutually, thus the performance index of direct deteriorates reception machine and transmitter.

The situation of whole bandwidth range can be processed in addition for other simultaneously, generally realized the adjustment of base station frequency by adjustment IF-FRE.Now analog intermediate frequency needs to cover whole bandwidth resources, and signal bandwidth wants much narrow, and wide intermediate-frequency bandwidth can worsen the spurious reduction performance of transmitter and the block resistance of receiver.

Existing base station frequency adjustment implementation, according to realizing position in link, be divided into digital shift frequency (scheme 1) and simulate shift frequency (scheme 2) two schemes, typical architecture as shown in Figure 1.Both hardware structures are identical, comprise Base-Band Processing, radio frequency processing, local oscillator, external antenna four parts.Numeral frequency shift schemes realizes the change of base station frequency at baseband processing portion by adjustment numerical frequency, and local oscillator is fixed frequency simultaneously; Simulation frequency shift schemes realizes the change of base station frequency at Radio frequency Processing Unit, RF Processing Unit by adjustment local oscillator, and the numerical frequency of baseband processing portion is fixed frequency simultaneously.

There is the narrower and shortcoming of influential system performance of frequency band adjustable scope in existing digital frequency shift schemes, and simulates frequency shift schemes and there is shortcoming to system performance degradation, specific as follows:

Adopt digital frequency shift schemes, local oscillator is fixed frequency, only adjusts frequency in intermediate-frequency bandwidth.Due to the restriction of Current hardware platform, support that base station adjustable frequency scope is narrower; And need to take limited intermediate-frequency bandwidth resource, transmitter spurious reduction performance and receiver block resistance can be made to decline, and then cause the decline of systematic function.

Adopt simulation frequency shift schemes, numerical frequency is fixed, and shortcoming is the exact requirements due to base station frequency adjustment stepping, make local frequency stepping too small, and the too small fractional frequency division that can improve of stepping is spuious, worsens local oscillator noise.The phase noise of local oscillator worsens, and the key indexs such as the EVM (Error Vector Magnitude, error vector magnitude) of transmitter and the sensitivity of receiver also can worsen, and directly have influence on the performance of system; And local oscillator chip frequency precision index is had higher requirements.

Summary of the invention

The invention provides a kind of base station frequency method of adjustment and device, require high problem with resolution system penalty with to local oscillator chip frequency precision index.

In order to solve the problem, the invention discloses a kind of base station frequency method of adjustment, comprising:

Obtain original local frequency;

Described original local frequency is adjusted, obtains target local frequency;

Digital intermediate frequency frequency is obtained according to described target local frequency, center of housing estate frequency and fixed intermediate frequency frequency;

According to described target local frequency and described digital intermediate frequency frequency, base station frequency is adjusted.

Preferably, described described original local frequency to be adjusted, obtains target local frequency, comprising:

Original frequency division value is obtained according to described original local frequency, voltage controlled oscillator frequency division numerical value and phase demodulation frequency;

Target frequency division value is determined according to described original frequency division value;

Described target local frequency is obtained according to described target frequency division value, described voltage controlled oscillator frequency division numerical value and described phase demodulation frequency.

Preferably, describedly obtain original frequency division value according to described original local frequency, voltage controlled oscillator frequency division numerical value and phase demodulation frequency, comprising:

According to $\frac{f_{\mathrm{LO}1}\×\mathrm{Div}\_\mathrm{vco}}{F_{\mathrm{pfd}}}=\mathrm{Divider}=N+\frac{\mathrm{NUM}1}{\mathrm{DEN}1}$ Obtain original frequency division value;

Wherein, f _lO1for described original local frequency, Div_vco is described voltage controlled oscillator frequency division numerical value, F _pfdfor described phase demodulation frequency, Divider is described original frequency division value, and N is the integer part of described original frequency division value, for the fractional part of described original frequency division value, variables D EN1 assignment is fixed value F _pfd.

Preferably, describedly from described original frequency division value, determine target frequency division value, comprising:

Described variables D EN1 is quantized to default value;

The absolute value of M the difference that the fractional part that M the mark obtaining the variables D EN1 after quantizing deducts described original frequency division value obtains; Wherein, described M is the integer part of described default value;

Determine the mark corresponding with absolute value minimum in the absolute value of a described M difference, the mark of described correspondence is defined as described target frequency division value.

Preferably, described according to described target local frequency, center of housing estate frequency and fixed intermediate frequency frequency acquisition digital intermediate frequency frequency, comprise

After described center of housing estate frequency is deducted described target local frequency, then deduct described fixed intermediate frequency frequency, obtain digital intermediate frequency frequency.

Correspondingly, the invention also discloses a kind of base station frequency adjusting device, comprising:

Original local frequency acquisition module, for obtaining original local frequency;

Target local frequency acquisition module, for adjusting described original local frequency, obtains target local frequency;

Digital intermediate frequency frequency acquisition module, for obtaining digital intermediate frequency frequency according to described target local frequency, center of housing estate frequency and fixed intermediate frequency frequency;

Base station frequency adjusting module, for adjusting base station frequency according to described target local frequency and described digital intermediate frequency frequency.

Preferably, described target local frequency acquisition module, comprising:

Original frequency division value obtains submodule, for obtaining original frequency division value according to described original local frequency, voltage controlled oscillator frequency division numerical value and phase demodulation frequency;

Target frequency division value obtains submodule, for determining target frequency division value according to described original frequency division value;

Target local frequency obtains submodule, for obtaining described target local frequency according to described target frequency division value, described voltage controlled oscillator frequency division numerical value and described phase demodulation frequency.

Preferably, described original frequency division value obtain submodule according to

$\frac{f_{\mathrm{LO}1}\×\mathrm{Div}\_\mathrm{vco}}{F_{\mathrm{pfd}}}=\mathrm{Divider}=N+\frac{\mathrm{NUM}1}{\mathrm{DEN}1}$ Obtain original frequency division value;

Wherein, f _lO1for described original local frequency, Div_vco is described voltage controlled oscillator frequency division numerical value, F _pfdfor described phase demodulation frequency, Divider is described original frequency division value, and N is the integer part of described original frequency division value, for the fractional part of described original frequency division value, variables D EN1 assignment is fixed value F _pfd.

Preferably, described target frequency division value obtains submodule, comprising:

Quantize subelement, for described variables D EN1 is quantized to default value;

Absolute value obtains subelement, the absolute value of M the difference that the fractional part that M the mark for obtaining the variables D EN1 after quantification deducts described original frequency division value obtains; Wherein, described M is the integer part of described default value;

Target frequency division value determination subelement, for determining the mark corresponding with absolute value minimum in the absolute value of a described M difference, is defined as described target frequency division value by the mark of described correspondence.

Preferably, after described center of housing estate frequency is deducted described target local frequency by described digital intermediate frequency frequency acquisition module, then deduct described fixed intermediate frequency frequency, obtain digital intermediate frequency frequency.

Compared with background technology, the present invention includes following advantage:

First, in conjunction with digital shift frequency and simulation shift frequency two kinds of modes, without the need to changing hardware platform, only need the algorithm revising base station frequency adjustment, just can optimize base station frequency adjustment, for the exploitation of new product by soft firmware of upgrading, can directly use this algorithm, improve systematic function.

Secondly, original local frequency is obtained; Original local frequency is adjusted, obtain target local frequency, reduce the stepping requirement to local oscillator chip, local frequency can get larger stepping to suppress fractional frequency division spuious, thus ensure that the phase noise of local frequency is unaffected, systematic function does not worsen because local frequency changes, and can realize the reduction of cost.

Again, obtain digital intermediate frequency frequency according to target local frequency, center of housing estate frequency and fixed intermediate frequency frequency, to simulate shift frequency, numerical frequency is mainly used in the control of Adjustment precision, so substantially do not take intermediate-frequency bandwidth, optimizes systematic function.Because precision is ensured by numerical frequency part, the adjustment of more high-precision frequency can be realized, and be no longer limited to the frequency accuracy of local oscillator chip.

Finally, according to target local frequency and digital intermediate frequency frequency, base station frequency is adjusted.Collocation method and the configuration precision of base station frequency can be unified, be no longer limited to different local oscillator chips.

Accompanying drawing explanation

Fig. 1 is base station frequency adjustment configuration diagram in background technology;

Fig. 2 is the flow chart of a kind of base station frequency method of adjustment in the embodiment of the present invention one;

Fig. 3 is the configuration diagram of a kind of base station frequency method of adjustment in the embodiment of the present invention two;

Fig. 4 is the flow chart of a kind of base station frequency method of adjustment in the embodiment of the present invention two;

Fig. 5 is the flow chart of the another kind of base station frequency method of adjustment in the embodiment of the present invention two;

Fig. 6 is the flow chart of a kind of base station frequency method of adjustment in the embodiment of the present invention three;

Fig. 7 is the structure chart of a kind of base station frequency adjusting device in the embodiment of the present invention four;

Fig. 8 is the structure chart of a kind of base station frequency adjusting device in the embodiment of the present invention five.

Embodiment

For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, and below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.

A kind of base station frequency method of adjustment provided by the invention and device is introduced in detail below by enumerating several specific embodiment.

Embodiment one

Introduce a kind of base station frequency method of adjustment that the embodiment of the present invention provides in detail.

With reference to Fig. 2, show the flow chart of a kind of base station frequency method of adjustment in the embodiment of the present invention.

Step 100, obtains original local frequency.

The original local frequency of uncomfortable integer word frequency is obtained according to the center of housing estate frequency arranged in base station and fixed intermediate frequency frequency.

Step 102, adjusts described original local frequency, obtains target local frequency.

First, original local frequency is adjusted, obtain the original frequency division value of original local frequency, secondly, determine that the original frequency division value distance obtained quantizes the how far of rear frequency division value, obtain target frequency division value, again, target local frequency is calculated according to target frequency division value.

Step 104, obtains digital intermediate frequency frequency according to described target local frequency, center of housing estate frequency and fixed intermediate frequency frequency.

Center of housing estate frequency is deducted target local frequency and fixed intermediate frequency frequency obtains digital intermediate frequency frequency.

Step 106, adjusts base station frequency according to described target local frequency and described digital intermediate frequency frequency.

After obtaining target local frequency and digital intermediate frequency frequency, namely can adjust base station frequency according to target local frequency and digital intermediate frequency frequency.Can with reference to existing base station frequency adjustment process to the process that base station frequency adjusts according to target local frequency and digital intermediate frequency frequency, the embodiment of the present invention does not limit this process.

In sum, the technical scheme of the embodiment of the present invention, first, in conjunction with digital shift frequency and simulation shift frequency two kinds of modes, without the need to changing hardware platform, only need the algorithm revising base station frequency adjustment, base station frequency adjustment just can be optimized by soft firmware of upgrading, for the exploitation of new product, can directly use this algorithm, improve systematic function.

Secondly, original local frequency is obtained; Original local frequency is adjusted, obtain target local frequency, reduce the stepping requirement to local oscillator chip, local frequency can get larger stepping to suppress fractional frequency division spuious, thus ensure that the phase noise of local frequency is unaffected, systematic function does not worsen because local frequency changes, and can realize the reduction of cost.

Again, obtain digital intermediate frequency frequency according to target local frequency, center of housing estate frequency and fixed intermediate frequency frequency, to simulate shift frequency, numerical frequency is mainly used in the control of Adjustment precision, so substantially do not take intermediate-frequency bandwidth, optimizes systematic function.Because precision is ensured by numerical frequency part, the adjustment of more high-precision frequency can be realized, and be no longer limited to the frequency accuracy of local oscillator chip.

Finally, according to target local frequency and digital intermediate frequency frequency, base station frequency is adjusted.Collocation method and the configuration precision of base station frequency can be unified, be no longer limited to different local oscillator chips.

Embodiment two

Introduce a kind of base station frequency method of adjustment that the embodiment of the present invention provides in detail.

With reference to Fig. 3, show the configuration diagram of a kind of base station frequency method of adjustment in the embodiment of the present invention.

The scheme framework of the embodiment of the present invention comprises four parts, is respectively Base-Band Processing, radio frequency processing, local oscillator and external antenna.

With reference to Fig. 4, show the flow chart of a kind of base station frequency method of adjustment in the embodiment of the present invention.

Step 200, obtains original local frequency.

The original local frequency of uncomfortable integer word frequency is obtained according to the center of housing estate frequency arranged in base station and fixed intermediate frequency frequency.

Such as, according to f _lO1=f _rF-F _iFobtain original local frequency.

Wherein, f _lO1for original local frequency, f _rFfor center of housing estate frequency, F _iFfor fixed intermediate frequency frequency.

Step 202, adjusts described original local frequency, obtains target local frequency.

First, original local frequency is adjusted, obtain the original frequency division value of original local frequency, secondly, determine that the original frequency division value distance obtained quantizes the how far of rear frequency division value, obtain target frequency division value, again, target local frequency is calculated according to target frequency division value.

Preferably, described step 202 can comprise:

Step 2021, obtains original frequency division value according to described original local frequency, voltage controlled oscillator frequency division numerical value and phase demodulation frequency.

Such as, can basis $\frac{f_{\mathrm{LO}1}\×\mathrm{Div}\_\mathrm{vco}}{F_{\mathrm{pfd}}}=\mathrm{Divider}=N+\frac{\mathrm{NUM}1}{\mathrm{DEN}1}$ Obtain original frequency division value.

Wherein, f _lO1for described original local frequency, Div_vco is described voltage controlled oscillator frequency division numerical value, is the frequency of VCO (Voltage Controlled Oscillator, voltage controlled oscillator) and the ratio of original local frequency, F _pfdfor described phase demodulation frequency, Divider is described original frequency division value, and N is the integer part of described original frequency division value, for the fractional part of described original frequency division value, variables D EN1 assignment is fixed value F _pfd.

Step 2022, determines target frequency division value according to described original frequency division value.

Preferably, described step 2022 can comprise:

Step 1, quantizes to default value by described variables D EN1.

In above-mentioned steps 2021, the value of described variables D EN1 is comparatively large, in step 2022, variables D EN1 is quantized to less default value, such as, and DEN1=8.

Step 2, the absolute value of M the difference that the fractional part that M the mark obtaining the variables D EN1 after quantizing deducts original frequency division value obtains; Wherein, described M is the integer part of described default value.

The value of the M in a described M mark is equal with default value, and e.g., above-mentioned variables D EN1 quantizes to 8, then M=8, and a described M mark is respectively

Step 3, determines the mark corresponding with absolute value minimum in the absolute value of a described M difference, and the mark of described correspondence is defined as described target frequency division value.

Such as, above-mentioned the absolute value of the difference that the fractional part deducting frequency division value obtains is minimum, then will as target frequency division value.If the absolute value that there is the difference that fractional part that two marks deduct frequency division value obtains is minimum, then two marks can, such as get its medium and small mark as target frequency division value.

Step 2023, obtains described target local frequency according to described target frequency division value, described voltage controlled oscillator frequency division numerical value and described phase demodulation frequency.

Can basis $\frac{f_{\mathrm{LO}1}\×\mathrm{Div}\_\mathrm{vco}}{F_{\mathrm{pfd}}}=\mathrm{Divider}=N+\frac{\mathrm{NUM}1}{\mathrm{DEN}1}$ Backwards calculation, obtain target local frequency, namely

According to $(N+\frac{\mathrm{NUM}}{\mathrm{DEN}})\×\frac{F_{\mathrm{pfd}}}{\mathrm{Div}\_\mathrm{vco}}=f_{\mathrm{LO}}$ Obtain target local frequency.

Wherein, for target frequency division value, f _lOfor target local frequency.

NUM and DEN can be converted into 16 systems, configure in the register of local oscillator chip.

Step 204, obtains digital intermediate frequency frequency according to described target local frequency, center of housing estate frequency and fixed intermediate frequency frequency.

Preferably, described step 204 can be:

After described center of housing estate frequency is deducted described target local frequency, then deduct described fixed intermediate frequency frequency, obtain digital intermediate frequency frequency.

Namely according to f _nCO=f _rF-f _lO-F _iFobtain digital intermediate frequency frequency f _nCO.

By in the register of digital intermediate frequency frequency write baseband processing portion, exceed the rejection of data of NCO in baseband processing portion (Numerically Controlled Oscillator, numerically-controlled oscillator) Adjustment precision.

Step 206, adjusts base station frequency according to described target local frequency and described digital intermediate frequency frequency.

After obtaining target local frequency and digital intermediate frequency frequency, namely can adjust base station frequency according to target local frequency and digital intermediate frequency frequency.Can with reference to existing base station frequency adjustment process to the process that base station frequency adjusts according to target local frequency and digital intermediate frequency frequency, the embodiment of the present invention does not limit this process.

Under special circumstances, such as f _lO1appear at the VCO lower boundary of local oscillator chip, now decision algorithm needs to be modified to judgement eight numbers and fractional part the order of magnitude of difference, gets and is greater than numerical value and nearest data.Otherwise, if f _lO1appear at the VCO coboundary of local oscillator chip, get and be less than numerical value and nearest data.

If DEN1 is diminished equal 1, now the local oscillator chip of fractional frequency division just can be replaced with the local oscillator chip of integral frequency divisioil, greatly reduces the requirement to local oscillator chip, can reduce hardware cost.

Such as, f _lO1=2381.44MHz, F _pfd=30720kHz, Div_vco=1, calculate N=77, NUM1=16000, DEN1=30720, if fixing DEN=8, then obtain NUM=4 through judgement, N=77 integer part is constant, calculates f _lO=2380.8MHz.Meanwhile, f _lO1-f _lO=2381.44-2380.8=0.64MHz is configured by digital NCO and obtains.

The realization flow of the technical scheme in the embodiment of the present invention can also be reduced to shown in Fig. 5.First according to cell frequency, calculate original local frequency, adjust original local frequency during simulation shift frequency, then calculate inherent spurious frequency deviation, during digital shift frequency, adjust the digital NCO of baseband processing portion.Whole process realizes in two steps, directly can reduce the stepping accuracy of original local frequency, realizes the base station frequency adjustment in ultratvide frequency band, systematic function can be made again unaffected.

Technical scheme in the embodiment of the present invention is to simulate shift frequency, and numerical frequency is mainly used in the control of Adjustment precision, so substantially do not take intermediate-frequency bandwidth, optimizes systematic function.

The parallel compensate part of the technical scheme in the embodiment of the present invention, can distribute flexibly according to concrete chip performance.Parallel compensate follows the principle not reducing local oscillation signal performance index, and take into account in base station frequency adjustment simultaneously and be adjusted to main with analog frequency, numerical frequency is adjusted to auxiliary principle.

In sum, the technical scheme of the embodiment of the present invention, first, in conjunction with digital shift frequency and simulation shift frequency two kinds of modes, without the need to changing hardware platform, only need the algorithm revising base station frequency adjustment, base station frequency adjustment just can be optimized by soft firmware of upgrading, for the exploitation of new product, can directly use this algorithm, improve systematic function.

Secondly, original local frequency is obtained; Original local frequency is adjusted, obtain target local frequency, reduce the stepping requirement to local oscillator chip, local frequency can get larger stepping to suppress fractional frequency division spuious, thus ensure that the phase noise of local frequency is unaffected, systematic function does not worsen because local frequency changes, and can realize the reduction of cost.

Again, obtain digital intermediate frequency frequency according to target local frequency, center of housing estate frequency and fixed intermediate frequency frequency, to simulate shift frequency, numerical frequency is mainly used in the control of Adjustment precision, so substantially do not take intermediate-frequency bandwidth, optimizes systematic function.Because precision is ensured by numerical frequency part, the adjustment of more high-precision frequency can be realized, and be no longer limited to the frequency accuracy of local oscillator chip.

Finally, according to target local frequency and digital intermediate frequency frequency, base station frequency is adjusted.Collocation method and the configuration precision of base station frequency can be unified, be no longer limited to different local oscillator chips.

Embodiment three

Introduce a kind of base station frequency method of adjustment that the embodiment of the present invention provides in detail.

With reference to Fig. 6, show the flow chart of a kind of base station frequency method of adjustment in the embodiment of the present invention.

Step 300, calculates the original local frequency of uncomfortable integer word frequency.

According to f _lO1=f _rF-F _iFobtain original local frequency.

Wherein, f _lO1for original local frequency, f _rFfor center of housing estate frequency, F _iFfor fixed intermediate frequency frequency.

Step 302, obtains the original frequency division value of original local frequency.

According to $\frac{f_{\mathrm{LO}1}\×\mathrm{Div}\_\mathrm{vco}}{F_{\mathrm{pfd}}}=\mathrm{Divider}=N+\frac{\mathrm{NUM}1}{\mathrm{DEN}1}$ Obtain original frequency division value.

Wherein, f _lO1for described original local frequency, Div_vco is described voltage controlled oscillator frequency division numerical value, is the frequency of VCO and the ratio of original local frequency, F _pfdfor described phase demodulation frequency, Divider is described original frequency division value, and N is the integer part of described original frequency division value, and variables D EN1 assignment is fixed value F _pfd, for the fractional part of described original frequency division value.

Step 304, adjudicates the how far of original frequency division value distance objective frequency division value.

Specific implementation needs amendment drive software part, drive software increases decision algorithm code.Fix N and Div_vco, quantize to comparatively fractional value, such as DEN1=8 by DEN1, judgement eight marks with the order of magnitude of difference.

Step 306, determines the target frequency division value of original local frequency.

In above-mentioned steps 305, which absolute value is minimum, just the assignment again and again of these eight marks of correspondence is given with represent that this new numerical value is as target frequency division value.

Step 308, calculates target local frequency according to target frequency division value.

Can basis $\frac{f_{\mathrm{LO}1}\×\mathrm{Div}\_\mathrm{vco}}{F_{\mathrm{pfd}}}=\mathrm{Divider}=N+\frac{\mathrm{NUM}1}{\mathrm{DEN}1}$ Backwards calculation, obtain target local frequency.

Step 310, determines digital intermediate frequency frequency.

According to f _nCO=f _rF-f _lO-F _iFcalculate digital intermediate frequency frequency, the register of write baseband processing portion.Exceed the rejection of data of NCO Adjustment precision in baseband processing portion.

Step 312, completes base station frequency adjustment according to target local frequency and digital intermediate frequency frequency.

In sum, the technical scheme of the embodiment of the present invention, first, in conjunction with digital shift frequency and simulation shift frequency two kinds of modes, without the need to changing hardware platform, only need the algorithm revising base station frequency adjustment, base station frequency adjustment just can be optimized by soft firmware of upgrading, for the exploitation of new product, can directly use this algorithm, improve systematic function.

Secondly, original local frequency is obtained; Original local frequency is adjusted, obtain target local frequency, reduce the stepping requirement to local oscillator chip, local frequency can get larger stepping to suppress fractional frequency division spuious, thus ensure that the phase noise of local frequency is unaffected, systematic function does not worsen because local frequency changes, and can realize the reduction of cost.

Again, obtain digital intermediate frequency frequency according to target local frequency, center of housing estate frequency and fixed intermediate frequency frequency, to simulate shift frequency, numerical frequency is mainly used in the control of Adjustment precision, so substantially do not take intermediate-frequency bandwidth, optimizes systematic function.Because precision is ensured by numerical frequency part, the adjustment of more high-precision frequency can be realized, and be no longer limited to the frequency accuracy of local oscillator chip.

Finally, according to target local frequency and digital intermediate frequency frequency, base station frequency is adjusted.Collocation method and the configuration precision of base station frequency can be unified, be no longer limited to different local oscillator chips.

Embodiment four

Introduce a kind of base station frequency adjusting device that the embodiment of the present invention provides in detail.

With reference to Fig. 7, show the structure chart of a kind of base station frequency adjusting device in the embodiment of the present invention.

Described device can comprise: original local frequency acquisition module 400, target local frequency acquisition module 402, digital intermediate frequency frequency acquisition module 404, base station frequency adjusting module 406.

Introduce the relation between the function of each module and each module below respectively in detail.

Original local frequency acquisition module 400, for obtaining original local frequency.

Target local frequency acquisition module 402, for adjusting described original local frequency, obtains target local frequency.

Digital intermediate frequency frequency acquisition module 404, for obtaining digital intermediate frequency frequency according to described target local frequency, center of housing estate frequency and fixed intermediate frequency frequency.

Base station frequency adjusting module 406, for adjusting base station frequency according to described target local frequency and described digital intermediate frequency frequency.

In sum, the technical scheme of the embodiment of the present invention, first, in conjunction with digital shift frequency and simulation shift frequency two kinds of modes, without the need to changing hardware platform, only need the algorithm revising base station frequency adjustment, base station frequency adjustment just can be optimized by soft firmware of upgrading, for the exploitation of new product, can directly use this algorithm, improve systematic function.

Secondly, original local frequency is obtained; Original local frequency is adjusted, obtain target local frequency, reduce the stepping requirement to local oscillator chip, local frequency can get larger stepping to suppress fractional frequency division spuious, thus ensure that the phase noise of local frequency is unaffected, systematic function does not worsen because local frequency changes, and can realize the reduction of cost.

Again, obtain digital intermediate frequency frequency according to target local frequency, center of housing estate frequency and fixed intermediate frequency frequency, to simulate shift frequency, numerical frequency is mainly used in the control of Adjustment precision, so substantially do not take intermediate-frequency bandwidth, optimizes systematic function.Because precision is ensured by numerical frequency part, the adjustment of more high-precision frequency can be realized, and be no longer limited to the frequency accuracy of local oscillator chip.

Finally, according to target local frequency and digital intermediate frequency frequency, base station frequency is adjusted.Collocation method and the configuration precision of base station frequency can be unified, be no longer limited to different local oscillator chips.

Embodiment five

Introduce a kind of base station frequency adjusting device that the embodiment of the present invention provides in detail.

With reference to Fig. 8, show the structure chart of a kind of base station frequency adjusting device in the embodiment of the present invention.

Described device can comprise: original local frequency acquisition module 500, target local frequency acquisition module 502, digital intermediate frequency frequency acquisition module 504, base station frequency adjusting module 506.

Wherein, described target local frequency acquisition module 502, can comprise: original frequency division value obtains submodule 5021, and target frequency division value obtains submodule 5022, and target local frequency obtains submodule 5023.

Described target frequency division value obtains submodule 5022, can comprise:

Quantize subelement 50221, absolute value obtains subelement 50222, target frequency division value determination subelement 50223.

Introduce the relation between each module, each submodule, the function of each subelement and each module, each submodule, each subelement below respectively in detail.

Original local frequency acquisition module 500, for obtaining original local frequency.

Target local frequency acquisition module 502, for adjusting described original local frequency, obtains target local frequency.

Preferably, described target local frequency acquisition module 502, can comprise:

Original frequency division value obtains submodule 5021, for obtaining original frequency division value according to described original local frequency, voltage controlled oscillator frequency division numerical value and phase demodulation frequency.

Preferably, described original frequency division value acquisition submodule 5021 can basis

$\frac{f_{\mathrm{LO}1}\×\mathrm{Div}\_\mathrm{vco}}{F_{\mathrm{pfd}}}=\mathrm{Divider}=N+\frac{\mathrm{NUM}1}{\mathrm{DEN}1}$ Obtain original frequency division value;

Wherein, f _lO1for described original local frequency, Div_vco is described voltage controlled oscillator frequency division numerical value, F _pfdfor described phase demodulation frequency, Divider is described original frequency division value, and N is the integer part of described original frequency division value, for the fractional part of described original frequency division value, variables D EN1 assignment is fixed value F _pfd.

Target frequency division value obtains submodule 5022, for determining target frequency division value according to described original frequency division value.

Preferably, described target frequency division value obtains submodule 5022, can comprise:

Quantize subelement 50221, for described variables D EN1 is quantized to default value.

Absolute value obtains subelement 50222, the absolute value of M the difference that the fractional part that M the mark for obtaining the variables D EN1 after quantification deducts described frequency division value obtains; Wherein, described M is the integer part of described default value.

Target frequency division value determination subelement 50223, for determining the mark corresponding with absolute value minimum in the absolute value of a described M difference, is defined as described target frequency division value by the mark of described correspondence.

Target local frequency obtains submodule 5023, for obtaining described target local frequency according to described target frequency division value, described voltage controlled oscillator frequency division numerical value and described phase demodulation frequency.

Digital intermediate frequency frequency acquisition module 504, for obtaining digital intermediate frequency frequency according to described target local frequency, center of housing estate frequency and fixed intermediate frequency frequency.

Preferably, after described center of housing estate frequency is deducted described target local frequency by described digital intermediate frequency frequency acquisition module 504, then deduct described fixed intermediate frequency frequency, obtain digital intermediate frequency frequency.

Base station frequency adjusting module 506, for adjusting base station frequency according to described target local frequency and described digital intermediate frequency frequency.

In sum, the technical scheme of the embodiment of the present invention, first, in conjunction with digital shift frequency and simulation shift frequency two kinds of modes, without the need to changing hardware platform, only need the algorithm revising base station frequency adjustment, base station frequency adjustment just can be optimized by soft firmware of upgrading, for the exploitation of new product, can directly use this algorithm, improve systematic function.

Secondly, original local frequency is obtained; Original local frequency is adjusted, obtain target local frequency, reduce the stepping requirement to local oscillator chip, local frequency can get larger stepping to suppress fractional frequency division spuious, thus ensure that the phase noise of local frequency is unaffected, systematic function does not worsen because local frequency changes, and can realize the reduction of cost.

Again, obtain digital intermediate frequency frequency according to target local frequency, center of housing estate frequency and fixed intermediate frequency frequency, to simulate shift frequency, numerical frequency is mainly used in the control of Adjustment precision, so substantially do not take intermediate-frequency bandwidth, optimizes systematic function.Because precision is ensured by numerical frequency part, the adjustment of more high-precision frequency can be realized, and be no longer limited to the frequency accuracy of local oscillator chip.

Finally, according to target local frequency and digital intermediate frequency frequency, base station frequency is adjusted.Collocation method and the configuration precision of base station frequency can be unified, be no longer limited to different local oscillator chips.

For device embodiment, due to itself and embodiment of the method basic simlarity, so description is fairly simple, relevant part illustrates see the part of embodiment of the method.

Each embodiment in this specification all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar part mutually see.

A kind of base station frequency the method for adjustment above embodiment of the present invention provided and device, be described in detail, apply specific case herein to set forth principle of the present invention and execution mode, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.

Claims (10)

1. a base station frequency method of adjustment, is characterized in that, comprising:

Obtain original local frequency;

Described original local frequency is adjusted, obtains target local frequency;

Digital intermediate frequency frequency is obtained according to described target local frequency, center of housing estate frequency and fixed intermediate frequency frequency;

According to described target local frequency and described digital intermediate frequency frequency, base station frequency is adjusted.

2. method according to claim 1, is characterized in that, describedly adjusts described original local frequency, obtains target local frequency, comprising:

Original frequency division value is obtained according to described original local frequency, voltage controlled oscillator frequency division numerical value and phase demodulation frequency;

Target frequency division value is determined according to described original frequency division value;

Described target local frequency is obtained according to described target frequency division value, described voltage controlled oscillator frequency division numerical value and described phase demodulation frequency.

3. method according to claim 2, is characterized in that, describedly obtains original frequency division value according to described original local frequency, voltage controlled oscillator frequency division numerical value and phase demodulation frequency, comprising:

According to $\frac{f_{L01}\×\mathrm{Div}\_\mathrm{vco}}{F_{\mathrm{pfd}}}=\mathrm{Divider}=N+\frac{\mathrm{NUM}1}{\mathrm{DEN}1}$ Obtain original frequency division value;

Wherein, f _lO1for described original local frequency, Div_vco is described voltage controlled oscillator frequency division numerical value, F _pfdfor described phase demodulation frequency, Divider is described original frequency division value, and N is the integer part of described original frequency division value, for the fractional part of described original frequency division value, variables D EN1 assignment is fixed value F _pfd.

4. method according to claim 3, is characterized in that, describedly from described original frequency division value, determines target frequency division value, comprising:

Described variables D EN1 is quantized to default value;

The absolute value of M the difference that the fractional part that M the mark obtaining the variables D EN1 after quantizing deducts described original frequency division value obtains; Wherein, described M is the integer part of described default value;

Determine the mark corresponding with absolute value minimum in the absolute value of a described M difference, the mark of described correspondence is defined as described target frequency division value.

5. method according to claim 1, is characterized in that, described according to described target local frequency, center of housing estate frequency and fixed intermediate frequency frequency acquisition digital intermediate frequency frequency, comprises

After described center of housing estate frequency is deducted described target local frequency, then deduct described fixed intermediate frequency frequency, obtain digital intermediate frequency frequency.

6. a base station frequency adjusting device, is characterized in that, comprising:

Original local frequency acquisition module, for obtaining original local frequency;

Target local frequency acquisition module, for adjusting described original local frequency, obtains target local frequency;

Digital intermediate frequency frequency acquisition module, for obtaining digital intermediate frequency frequency according to described target local frequency, center of housing estate frequency and fixed intermediate frequency frequency;

Base station frequency adjusting module, for adjusting base station frequency according to described target local frequency and described digital intermediate frequency frequency.

7. device according to claim 6, is characterized in that, described target local frequency acquisition module, comprising:

Original frequency division value obtains submodule, for obtaining original frequency division value according to described original local frequency, voltage controlled oscillator frequency division numerical value and phase demodulation frequency;

Target frequency division value obtains submodule, for determining target frequency division value according to described original frequency division value;

Target local frequency obtains submodule, for obtaining described target local frequency according to described target frequency division value, described voltage controlled oscillator frequency division numerical value and described phase demodulation frequency.

8. device according to claim 7, is characterized in that, described original frequency division value obtain submodule according to obtain original frequency division value;

Wherein, f _lO1for described original local frequency, Div_vco is described voltage controlled oscillator frequency division numerical value, F _pfdfor described phase demodulation frequency, Divider is described original frequency division value, and N is the integer part of described original frequency division value, for the fractional part of described original frequency division value, variables D EN1 assignment is fixed value F _pfd.

9. device according to claim 8, is characterized in that, described target frequency division value obtains submodule, comprising:

Quantize subelement, for described variables D EN1 is quantized to default value;

Absolute value obtains subelement, the absolute value of M the difference that the fractional part that M the mark for obtaining the variables D EN1 after quantification deducts described original frequency division value obtains; Wherein, described M is the integer part of described default value;

Target frequency division value determination subelement, for determining the mark corresponding with absolute value minimum in the absolute value of a described M difference, is defined as described target frequency division value by the mark of described correspondence.

10. device according to claim 6, is characterized in that, after described center of housing estate frequency is deducted described target local frequency by described digital intermediate frequency frequency acquisition module, then deducts described fixed intermediate frequency frequency, obtains digital intermediate frequency frequency.