CN109302722A - A kind of mobile communication base station indoor distribution power testing method - Google Patents
A kind of mobile communication base station indoor distribution power testing method Download PDFInfo
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- CN109302722A CN109302722A CN201711321086.8A CN201711321086A CN109302722A CN 109302722 A CN109302722 A CN 109302722A CN 201711321086 A CN201711321086 A CN 201711321086A CN 109302722 A CN109302722 A CN 109302722A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
- H04B17/327—Received signal code power [RSCP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
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Abstract
The invention discloses a kind of mobile communication base station indoor distribution device for testing power and method, described device includes first switch module, bandpass filter group, second switch module, the first frequency mixing module, the second frequency mixing module, the first local oscillator module, the second local oscillator module, clock module, A/D conversion module, FPGA module.Measurement of the present invention for different operators, different communication standard, it can be switched fast by controlling filter group, configuration local oscillator output power in real time, high speed acquisition is carried out to data using the sampling clock of high sampling rate simultaneously, it is quick and precisely measured being realized according to different communication standard with interior power, not only solves the problems, such as traditional measurement power measurement inaccuracy, also achieve different communication base station while sending, simultaneously measure problem, effective solution testing efficiency and test accuracy problem.
Description
Technical field
The present invention relates to base station indoor distribution testing fields more particularly to a kind of mobile communication base station indoor distribution power to survey
Method for testing.
Background technique
With the rapid development of communication technology, the base station of multi-operator, a variety of communication standards and mode deposited is more and more general
And the extensive layout of especially indoor distribution, how to determine in the extensive layout of indoor distribution, different frequency, difference are logical
Believe the base station power under standard, becomes the project that industry is increasingly paid close attention to.As the important component of Communication Development, communication is surveyed
Test instrument has played irreplaceable role in testing, and base station indoor distribution power test instrument is used as a wherein important ring,
It plays an increasingly important role.
Measurement for indoor distribution power of standing, traditional measurement method is that statistical test is carried out by power meter, this
The drawbacks of measurement method, is, in the case where all base stations open simultaneously, power meter can be all signal function of current channel
Rate is added up, which operator cannot differentiate on earth is, the base station of which communication standard issues, while even if therein cannot
Normal work can not judge very well.Base station can only be switched one by one when therefore being measured and tried with power to be tested, this side
Formula efficiency is extremely low, and can also bring the unstability of lateral index.
Therefore, there are also to be developed for the prior art.
Summary of the invention
Place in view of above-mentioned deficiencies of the prior art, it is an object of the invention to solve in the prior art, base station efficiency is extremely
Low problem.
In order to achieve the above object, this invention takes following technical schemes:
A kind of mobile communication base station indoor distribution device for testing power, including first switch module 1, bandpass filter group 2,
Second switch module 3, the first frequency mixing module 6, the second frequency mixing module 7, the first local oscillator module 4, the second local oscillator module 5, clock mould
Block 9, A/D conversion module 8, FPGA module 10, the output end and 2 input terminal of bandpass filter group of the first switch module 1 connect
Connect, 2 output end of bandpass filter group is connect with 3 input terminal of second switch module, 3 output end of second switch module with
The connection of first frequency mixing module, 6 input terminal, 6 output end of the first frequency mixing module is connect with 7 input terminal of the second frequency mixing module, described
Second frequency mixing module, 7 output end is connect with 8 input terminal of A/D conversion module, 8 output end of A/D conversion module and FPGA module
The connection of 10 input terminals, 6 input terminal of the first frequency mixing module are also connect with 4 output end of the first local oscillator module, second mixing
7 input terminal of module is also connect with 5 output end of the second local oscillator module, and 8 input terminal of A/D conversion module is also defeated with clock module 9
Outlet connection.
Further, the bandpass filter group 2 include 11 groups of bandpass filters, be BPF1, BPF2......BPF11,
The input terminal of 11 groups of bandpass filters is connect with first switch module output end, and the output end of 11 groups of bandpass filters is equal
It is connect with second switch module input.
Further, the bandwidth of the channel bandpass filtering, being fixed as BPF1 is 10MHz, and BPF2 20MHz, BPF3 are
15MHz, BPF4 30MHz, BPF5 10MHz, BPF6 15MHz, BPF7 50MHz, BPF8 10MHz, BPF9 are
40MHz, BPF10 20MHz, BPF11 15MHz.
Based on a kind of mobile communication base station indoor distribution device for testing power, the present invention also provides a kind of mobile communication bases
It stands indoor distribution power testing method,
Include the following steps:
Step S1: being connected and fixed attenuator according to base station peak power output and configures reference level, and line loss is arranged,
Test is completed to prepare；
Step S2: the centre frequency of configuration mobile communication base station indoor distribution device for testing power；
Step S3: the second output frequency of configuration is fixed as 702.8MHz, to guarantee the first frequency mixing module output frequency
1856.4MHz and the second frequency mixing module output frequency 153.6MHz, can be used as intermediate-freuqncy signal and is transmitted to A/D conversion module；
Step S4: configuration if sampling clock, frequency 245.76Mbps；
Step S5: according to different communication standard in FPGA, local reference signal that sampled data is from a locally generated into
Row synchronizes, and obtains radio frames starting point；
Step S6: the position of synchronous point is obtained from step S5, from sampling of the position inside FPGA to all symbols
Point carries out the complex fast Fourier that length is 245.76Mbps*1ms and converts, and the data length after exporting FFT is k, described
FFT formula is formula (1)
Wherein, s (t) is transformed time domain data, and N is IFFT transform length, and j is imaginary unit, and Δ f is that frequency is inclined
It moves, the performance number of each sampled point after FFT transform is P=Pk+ Δ P, wherein Pk is the performance number after FFT transform, Δ P
For channel gain；
Step S7: to data of the step S6 after FFT transform according to the different systems broadbands of different operators with
The ratio of 122.88MHz, obtains the sampled data of corresponding standard, and sampled data length is
N=BW/122.88MHz*245.76Mbps*1ms,
Wherein N is the sampling number that present communications standard removes two end datas, and BW is the bandwidth of present communications standard；
Step S8: the base station power of next operator's frequency range is measured, step S2 is repeated to step S7, is repeatedly surveyed
Amount；
Step S9: by the measurement result of all operator's frequency ranges, it is uploaded to display interface, and is given according to the requirement of operator
Reference measurement values out judge whether the output of different operators base station power is qualified.
9, further, in step S6, the method that FFT transform can pass through repeated sampling data according to demand becomes FFT
It changes depth to become larger, to change frequency resolution.
Include the following steps:
Step S1: being connected and fixed attenuator according to base station peak power output and configures reference level, and line loss is arranged,
Test is completed to prepare；
Step S2: the centre frequency of configuration mobile communication base station indoor distribution device for testing power；
Step S3: the second output frequency of configuration is fixed as 702.8MHz, to guarantee the first frequency mixing module output frequency
1856.4MHz and the second frequency mixing module output frequency 153.6MHz, can be used as intermediate-freuqncy signal and is transmitted to A/D conversion module；
Step S4: configuration if sampling clock, frequency 245.76Mbps；
Step S5: according to different communication standard in FPGA, local reference signal that sampled data is from a locally generated into
Row synchronizes, and obtains radio frames starting point；
Step S6: the position of synchronous point is obtained from step S5, from sampling of the position inside FPGA to all symbols
Point carries out the complex fast Fourier that length is 245.76Mbps*1ms and converts, and the data length after exporting FFT is k, described
FFT formula is formula (1)
Wherein, s (t) is transformed time domain data, and N is IFFT transform length, and j is imaginary unit, and Δ f is that frequency is inclined
It moves, the performance number of each sampled point after FFT transform is P=Pk+ Δ P, wherein Pk is the performance number after FFT transform, Δ P
For channel gain；
Step S7: to data of the step S6 after FFT transform according to the different systems broadbands of different operators with
The ratio of 122.88MHz, obtains the sampled data of corresponding standard, and sampled data length is
N=BW/122.88MHz*245.76Mbps*1ms,
Wherein N is the sampling number that present communications standard removes two end datas, and BW is the bandwidth of present communications standard；
Step S8: the base station power of next operator's frequency range is measured, step S2 is repeated to step S7, is repeatedly surveyed
Amount；
Step S9: by the measurement result of all operator's frequency ranges, it is uploaded to display interface, and is given according to the requirement of operator
Reference measurement values out judge whether the output of different operators base station power is qualified.
Further, in step S2, the centre frequency needs to be calculated according to different operators, different systems, institute
It states centre frequency and is calculated as formula (2),
Fc=(Fstart+Fstop)/2 (2),
Wherein, Fc is center frequency, and Fstart is the initial frequency of current standard, and Fstop is the termination frequency of current standard
Rate.
Further, if sampling clock is configured in step S4, frequency 245.76Mbps, sample rate therein can root
According to the requirement of time of measuring and measurement accuracy, different sample rates is configured.
Further, in step S6, the method that FFT transform can pass through repeated sampling data according to demand makes FFT transform
Depth becomes larger, to change frequency resolution.
Further, it in step S7, needs to carry out root mean square detection to the data after FFT transform, to make the function of measurement
Rate precision further increases.
The present invention compared with prior art the utility model has the advantages that survey of the present invention for different operators, different communication standard
Amount can be switched fast, when configuring local oscillator output power in real time, while using the sampling of high sampling rate by controlling filter group
Clock carries out high speed acquisition to data, quick and precisely measures being realized according to different communication standard with interior power, not only solves tradition
The problem for measuring power measurement inaccuracy, also achieves different communication base station while sending, while measuring problem, effective solution
Testing efficiency and test accuracy problem.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of mobile communication base station indoor distribution device for testing power provided in an embodiment of the present invention；
Fig. 2 is a kind of process signal of mobile communication base station indoor distribution power testing method provided in an embodiment of the present invention
Figure；
Fig. 3 is a kind of survey of mobile communication base station indoor distribution device for testing power and method provided in an embodiment of the present invention
Measure result output figure.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
It should be noted that it can be directly another when element is referred to as " being fixed on " or " being set to " another element
On one element or it may be simultaneously present centering elements.When an element is known as " being connected to " another element, it can
To be directly to another element or may be simultaneously present centering elements.
It is only relative concept each other it should also be noted that, the positional terms such as left and right, upper and lower in the embodiment of the present invention
It or is to refer to, and should not be regarded as restrictive with the normal operating condition of product.
As shown in Figure 1, be a kind of mobile communication base station indoor distribution device for testing power of the specific embodiment of the invention,
Including first switch module, bandpass filter group, second switch module, the first frequency mixing module, the second frequency mixing module,
First local oscillator module, the second local oscillator module, clock module, A/D conversion module, FPGA module, the first switch module it is defeated
Outlet is connect with bandpass filter group input terminal, and the bandpass filter group output end is connect with second switch module input,
The second switch module output end is connect with the first frequency mixing module input terminal, and the first frequency mixing module output end and second mixes
The connection of frequency module input terminal, the second frequency mixing module output end are connect with A/D conversion module input terminal, the A/D modulus of conversion
Block output end is connect with FPGA module input terminal, and the first frequency mixing module input terminal also connects with the first local oscillator module output end
Connect, the second frequency mixing module input terminal is also connect with the second local oscillator module output end, the A/D conversion module input terminal also with
The connection of clock module output end.
Specifically, the bandpass filter group includes 11 groups of bandpass filters, it is described for BPF1, BPF2......BPF11
The input terminal of 11 groups of bandpass filters is connect with first switch module output end, and the output end of 11 groups of bandpass filters is with
The connection of two switch module input terminals.
Specifically, the bandwidth of the channel bandpass filtering, being fixed as BPF1 is 10MHz, and BPF2 20MHz, BPF3 are
15MHz, BPF4 30MHz, BPF5 10MHz, BPF6 15MHz, BPF7 50MHz, BPF8 10MHz, BPF9 are
40MHz, BPF10 20MHz, BPF11 15MHz.
As shown in Fig. 2, for a kind of mobile communication base station indoor distribution power test provided in the specific embodiment of the invention
Method,
Include the following steps:
Step S1: being connected and fixed attenuator according to base station peak power output and configures reference level, and line loss is arranged,
Test is completed to prepare；
Step S2: the centre frequency of configuration mobile communication base station indoor distribution device for testing power；
Step S3: the second output frequency of configuration is fixed as 702.8MHz, to guarantee the first frequency mixing module output frequency
1856.4MHz and the second frequency mixing module output frequency 153.6MHz, can be used as intermediate-freuqncy signal and is transmitted to A/D conversion module；
Step S4: configuration if sampling clock, frequency 245.76Mbps；
Step S5: according to different communication standard in FPGA, local reference signal that sampled data is from a locally generated into
Row synchronizes, and obtains radio frames starting point；
Step S6: the position of synchronous point is obtained from step S5, from sampling of the position inside FPGA to all symbols
Point carries out the complex fast Fourier that length is 245.76Mbps*1ms and converts, and the data length after exporting FFT is k, described
FFT formula is formula (1)
Wherein, s (t) is transformed time domain data, and N is IFFT transform length, and j is imaginary unit, and Δ f is that frequency is inclined
It moves, the performance number of each sampled point after FFT transform is P=Pk+ Δ P, wherein Pk is the performance number after FFT transform, Δ P
For channel gain；
Step S7: to data of the step S6 after FFT transform according to the different systems broadbands of different operators with
The ratio of 122.88MHz, obtains the sampled data of corresponding standard, and sampled data length is
N=BW/122.88MHz*245.76Mbps*1ms.
Wherein N is the sampling number that present communications standard removes two end datas, and BW is the bandwidth of present communications standard；
Step S8: the base station power of next operator's frequency range is measured, step S2 is repeated to step S7, is repeatedly surveyed
Amount；
Step S9: by the measurement result of all operator's frequency ranges, it is uploaded to display interface, and is given according to the requirement of operator
Reference measurement values out judge whether the output of different operators base station power is qualified.
Wherein, the requirement in step S2 to centre frequency is the half of the frequency range used according to current operator as in
Frequency of heart, centre frequency is set as 875 by taking telecommunications CDMA as an example.The frequency range that operator uses is respectively telecommunications CDMA frequency range 870-
880MHz, wherein telecommunications LTE800 frequency range 1860-1875MHz, 2100 frequency range 2110-2125MHz of telecommunications, mobile 900 frequency ranges
925-954MHz, mobile DCS2000 frequency range 1805--1815MHz, mobile TDS frequency range 2010--2025MHz, mobile 2.3G frequency range
2320--2370MHz, connection GSM frequency range 954--960MHz, connection WCDMA frequency range 2130--2170MHz, connection LTE2000 frequency
Section 1840--1860MHz, connection DCS2000 frequency range 1835--1850MHz.
Specifically, the centre frequency needs to be calculated according to different operators, different systems, described in step S2
Centre frequency is calculated as formula (2),
Fc=(Fstart+Fstop)/2 (2),
Wherein, Fc is center frequency, and Fstart is the initial frequency of current standard, and Fstop is the termination frequency of current standard
Rate.
Specifically, configuring if sampling clock in step S4, frequency 245.76Mbps, sample rate therein can basis
The requirement of time of measuring and measurement accuracy configures different sample rates.
Specifically, in step S6, the method that FFT transform can pass through repeated sampling data according to demand keeps FFT transform deep
Degree becomes larger, to change frequency resolution.
Specifically, needing to carry out root mean square detection to the data after FFT transform in step S7, to make the power of measurement
Precision further increases.
Measurement of the present invention for different operators, different communication standard can be switched fast by controlling filter group,
Configuration local oscillator output power in real time, while high speed acquisition is carried out to data using the sampling clock of high sampling rate, according to difference
Communication standard realization is quick and precisely measured with interior power, is not only solved the problems, such as traditional measurement power measurement inaccuracy, is also realized
Different communication base station is sent simultaneously, while measuring problem, effective solution testing efficiency and test accuracy problem.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (8)
1. a kind of mobile communication base station indoor distribution device for testing power, it is characterised in that: filtered including first switch module, band logical
Wave device group, second switch module, the first frequency mixing module, the second frequency mixing module, the first local oscillator module, the second local oscillator module, clock
The output end of module, A/D conversion module, FPGA module, the first switch module is connect with bandpass filter group input terminal, institute
It states bandpass filter group output end to connect with second switch module input, the second switch module output end is mixed with first
Module input connection, the first frequency mixing module output end are connect with the second frequency mixing module input terminal, the second mixing mould
Block output end is connect with A/D conversion module input terminal, and the A/D conversion module output end is connect with FPGA module input terminal, institute
It states the first frequency mixing module input terminal also to connect with the first local oscillator module output end, the second frequency mixing module input terminal is also with second
The connection of local oscillator module output end, the A/D conversion module input terminal are also connect with clock module output end.
2. a kind of mobile communication base station indoor distribution device for testing power according to claim 1, it is characterised in that: described
Bandpass filter group include 11 groups of bandpass filters, be BPF1, BPF2......BPF11,11 groups of bandpass filters it is defeated
Enter end to connect with first switch module output end, the output end of 11 groups of bandpass filters connects with second switch module input
It connects.
3. a kind of mobile communication base station indoor distribution device for testing power according to claim 2, it is characterised in that: described
The bandwidth of channel bandpass filtering, being fixed as BPF1 is 10MHz, BPF2 20MHz, BPF3 15MHz, BPF4 30MHz, BPF5
It is for 10MHz, BPF6 15MHz, BPF7 50MHz, BPF8 10MHz, BPF9 40MHz, BPF10 20MHz, BPF11
15MHz。
4. the test method based on a kind of mobile communication base station indoor distribution device for testing power, which is characterized in that including as follows
Step:
Step S1: being connected and fixed attenuator according to base station peak power output and configures reference level, and line loss is arranged, and completes
Test prepares；
Step S2: the centre frequency of configuration mobile communication base station indoor distribution device for testing power；
Step S3: the second output frequency of configuration is fixed as 702.8MHz, to guarantee the first frequency mixing module output frequency
1856.4MHz and the second frequency mixing module output frequency 153.6MHz, can be used as intermediate-freuqncy signal and is transmitted to A/D conversion module；
Step S4: configuration if sampling clock, frequency 245.76Mbps；
Step S5: according to different communication standard in FPGA, the local reference signal that sampled data is from a locally generated is carried out same
Step obtains radio frames starting point；
Step S6: obtaining the position of synchronous point from step S5, clicks through inside FPGA to the sampling of all symbols from the position
The complex fast Fourier that row length is 245.76Mbps*1ms converts, and the data length after exporting FFT is k, and the FFT is public
Formula is formula (1)
Wherein, s (t) is transformed time domain data, and N is IFFT transform length, and j is imaginary unit, and Δ f is frequency shift (FS), FFT
The performance number of each transformed sampled point is P=Pk+ Δ P, wherein Pk is the performance number after FFT transform, and Δ P is channel
Gain；
Step S7: to data of the step S6 after FFT transform according to the different systems broadband of different operators and 122.88MHz
Ratio, obtain the sampled data of corresponding standard, sampled data length is
N=BW/122.88MHz*245.76Mbps*1ms,
Wherein N is the sampling number that present communications standard removes two end datas, and BW is the bandwidth of present communications standard；
Step S8: the base station power of next operator's frequency range is measured, step S2 is repeated to step S7, takes multiple measurements；
Step S9: by the measurement result of all operator's frequency ranges, it is uploaded to display interface, and ginseng is provided according to the requirement of operator
Measured value is examined, judges whether the output of different operators base station power is qualified.
5. a kind of mobile communication base station indoor distribution power testing method according to claim 4, it is characterised in that: step
In S2, the centre frequency needs to be calculated according to different operators, different systems, and the centre frequency is calculated as formula
(2),
Fc=(Fstart+Fstop)/2 (2),
Wherein, Fc is center frequency, and Fstart is the initial frequency of current standard, and Fstop is the termination frequency of current standard.
6. a kind of mobile communication base station indoor distribution power testing method according to claim 4, it is characterised in that: step
If sampling clock is configured in S4, frequency 245.76Mbps, sample rate therein can be according to time of measuring and measurement accuracy
Requirement, configure different sample rates.
7. a kind of mobile communication base station indoor distribution power testing method according to claim 4, it is characterised in that: step
In S6, the method that FFT transform can pass through repeated sampling data according to demand makes FFT transform depth become larger, to change frequency
Resolution ratio.
8. a kind of mobile communication base station indoor distribution power testing method according to claim 4, it is characterised in that: step
It in S7, needs to carry out root mean square detection to the data after FFT transform, so that the power accuracy of measurement be made to further increase.
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| CN104135738A (en) * | 2014-05-28 | 2014-11-05 | 大唐移动通信设备有限公司 | Monitoring device for mobile communication |
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