CN209593767U - Support the equipment for realizing the measurement of NB-IOT base station signal - Google Patents

Support the equipment for realizing the measurement of NB-IOT base station signal Download PDF

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Publication number
CN209593767U
CN209593767U CN201920025886.3U CN201920025886U CN209593767U CN 209593767 U CN209593767 U CN 209593767U CN 201920025886 U CN201920025886 U CN 201920025886U CN 209593767 U CN209593767 U CN 209593767U
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signal
measurement
base station
filter
bandpass filter
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CN201920025886.3U
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陈爽
王志
白皓
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Transcom Shanghai Technologies Co Ltd
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Shanghai TransCom Instruments Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The utility model relates to a kind of equipment for supporting to realize the measurement of NB-IOT base station signal, including signal pickup assembly, carry out gain control for acquiring radiofrequency signal, and to signal；Signal filter processing device is connected with the signal pickup assembly, for being filtered to signal；Signal calculation processing apparatus is connected with the signal filter processing device, for converting analog signals into digital signal, and carries out calculation processing.Using the equipment, user is had the advantage that by the direct measurement result of single instrument, without additional attachment；Circuit structure is succinct, with strong points, and the power consumption of circuit is lower, and cost is greatly reduced；This programme have centainly can scalability, to realize the signal measurement of other network formats；It can be handled in software and FPGA, further simplify the complexity of hardware.

Description

Support the equipment for realizing the measurement of NB-IOT base station signal
Technical field
The utility model relates to internet of things field more particularly to the narrowband NB-IOT internet of things field, in particular to a kind of Hold the equipment for realizing the measurement of NB-IOT base station signal.
Background technique
The narrowband NB-IOT Internet of Things is widely popularized in recent years, and relevant operation and business are gradually unfolded.NB-IOT is wide It is general to be applied to the various industries such as logistics, household, medical treatment, agricultural, water power net, smart city, the wide, number of links with the network coverage It greatly, is the hardware foundation of the following all things on earth Internet age the features such as low rate, low cost, low-power consumption.In industrial application, scene Installation and maintenance are daily groundworks, are connected due to transmitting using radio open, the installation under some special scenes Maintenance needs some basic test means, and whether the network coverage to determine the position is effective, and the installation site of equipment can be just Often work, such as basement, underground pipe well etc..But due to the technical characterstic of NB-IOT, there are following in existing network application Some problems:
Due to industry penetration, client is extensive, and not all industry customer has conceptual understanding to radio frequency and wireless network. These clients operation and when construction at the scene, lacks the network environment that effective, succinct intuitive testing tool carries out scene and comments Estimate to carry out in-site installation and maintenance.
Existing network test means mainly use sweep generator and test mould group, have equipment huge, complicated for operation, special The strong feature of industry, and price is costly, it is unacceptable for industry customer.
The network of NB-IOT has the characteristics that extensively to cover, and Working mould group has high receiving sensitivity, 3GPP standard It is required that -140dBm or so, this is for site test device, it is desirable that there is higher measurement sensitivity and total noise of centrifuge coefficient, General instrument is unable to satisfy.
The given NB-IOT frequency point of different operators is different, it is desirable that equipment can satisfy the net of all operators simultaneously Network, this requires equipment to have multifrequency point tuning capability, therefore the frequency range coverage area of instrument is wider.
In conclusion there is presently no the NB-IOT for meeting such engineering test is existing from technology, price and operability Field test instrumentation, carries out assessment test to field network environmental quality, provides site operation and maintenance quantitative analysis.This is practical new Type combination the demand, proposes that a kind of structure is simple, low cost, low-power consumption, hand-held NB-IOT tester, frequency range from 500MHz~2700MHz, can real-time measurement specify operator most strong cell and its network signal quality, directly give assessment knot Fruit, and have the characteristics that it is easy to operate, be suitble to various industries user directly use.
Utility model content
The shortcomings that the purpose of the utility model is to overcome the above-mentioned prior arts, provide it is a kind of have signal specific aim, NB-IOT is realized in the relatively broad support of low in energy consumption, at low cost, simple and practical in structure, stable and reliable working performance, the scope of application The equipment of base station signal measurement.
To achieve the goals above, the support of the utility model realizes that the equipment of NB-IOT base station signal measurement is as follows:
The equipment that the measurement of NB-IOT base station signal is realized in the support, is mainly characterized by, the equipment includes that signal is adopted Acquisition means, signal filter processing device and signal calculation processing apparatus, the signal filter processing device and the signal Acquisition device is connected, and the signal calculation processing apparatus is connected with the signal filter processing device.
Preferably, the signal pickup assembly includes:
Antenna, for receiving radiofrequency signal；
Coupler is connected with the antenna；
Wave detector is connected with the coupler and signal calculation processing apparatus.
Preferably, the signal filter processing device includes:
First low-noise amplifier is connected with the coupler；
Bandpass filter group is connected with first low-noise amplifier；
Second low-noise amplifier is connected with the bandpass filter group；
Frequency mixer is connected with second low-noise amplifier；
Local oscillator is connected with the frequency mixer；
If bandpas filter is connected with the frequency mixer, for filtering out the other noise signals generated after mixing.
Preferably, the bandpass filter group includes the first bandpass filter, the second bandpass filter and third band logical Filter, first bandpass filter, the second bandpass filter and third bandpass filter are connected in described the Between one low-noise amplifier and the second low-noise amplifier.
Preferably, the signal calculation processing apparatus includes:
Voltage control Amplifier is connected with the if bandpas filter；
Automatic gain control circuit is connected with the voltage control Amplifier and wave detector；
Analog-digital converter is connected with the voltage control Amplifier；
Digital down converter is connected with the analog-digital converter；
Central processing unit is connected with the digital down converter.
Using the equipment that the measurement of NB-IOT base station signal is realized in the support of the utility model, compared with other equipment, tool (1) user is had the advantage that by the direct measurement result of single instrument, without additional attachment.(2) this programme circuit knot Structure is succinct, with strong points, and the power consumption of circuit is lower, and cost is greatly reduced.It is very suitable to the low cost of NB-IOT on-the-spot test Testing requirement.(3) this programme have centainly can scalability, according to algorithm difference, the signal of other network formats may be implemented Measurement.(4) signal processing of this programme uses a large amount of Digital Signal Processings, can be in software and FPGA Reason, further simplifies the complexity of hardware.
Detailed description of the invention
Fig. 1 is the circuit structure diagram that the equipment of NB-IOT base station signal measurement is realized in the support of the utility model.
Fig. 2 is one circuit structure of embodiment that the equipment of NB-IOT base station signal measurement is realized in the support of the utility model Figure.
Fig. 3 is two circuit structure of embodiment that the equipment of NB-IOT base station signal measurement is realized in the support of the utility model Figure.
Specific embodiment
In order to more clearly describe the technology contents of the utility model, carry out combined with specific embodiments below into one The description of step.
The support of the utility model is realized in the technical solution of the equipment of NB-IOT base station signal measurement, is led to be protected It is the hardware configuration and its connection relationship for supporting to realize the whole hardware capability platform of corresponding function, and wherein included each A functional module and modular unit can be corresponding to specific hard in hardware device known to reality or integrated circuit structure Part circuit, therefore the improvement of particular hardware topology connection structure and particular hardware circuit is only related to, the improvement of hardware components is It is existing, computer control software is not depended only on, and not belong to and only execute control software or computer program Carrier, therefore solve corresponding technical problem and obtain corresponding technical effect to be also not directed to any control software or meter The application of calculation machine program, that is to say, that the utility model is just with hard known to reality involved in these modules and unit Improvement in terms of part equipment or hardware circuit can solve technical problem to be solved, and obtain corresponding technology Effect, and do not need auxiliary and corresponding function can be thus achieved specifically to control software or computer program.
The equipment that the measurement of NB-IOT base station signal is realized in the support, wherein the equipment includes signal pickup assembly, letter Number filter processing device and signal calculation processing apparatus, the signal filter processing device and the signal pickup assembly phase Connection, the signal calculation processing apparatus are connected with the signal filter processing device.
As preferred embodiments of the present invention, the signal pickup assembly includes:
Antenna, for receiving radiofrequency signal；
Coupler is connected with the antenna；
Wave detector is connected with the coupler and signal calculation processing apparatus.
As preferred embodiments of the present invention, the signal filter processing device includes:
First low-noise amplifier is connected with the coupler；
Bandpass filter group is connected with first low-noise amplifier；
Second low-noise amplifier is connected with the bandpass filter group；
Frequency mixer is connected with second low-noise amplifier；
Local oscillator is connected with the frequency mixer；
If bandpas filter is connected with the frequency mixer, for filtering out the other noise signals generated after mixing.
As preferred embodiments of the present invention, the bandpass filter group includes the first bandpass filter, the Two band-pass filter and third bandpass filter, first bandpass filter, the second bandpass filter and the filter of third band logical Wave device is connected between first low-noise amplifier and the second low-noise amplifier.
As preferred embodiments of the present invention, the signal calculation processing apparatus includes:
Voltage control Amplifier is connected with the if bandpas filter；
Automatic gain control circuit is connected with the voltage control Amplifier and wave detector；
Analog-digital converter is connected with the voltage control Amplifier；
Digital down converter is connected with the analog-digital converter；
Central processing unit is connected with the digital down converter.
In specific embodiment of the present utility model, Fig. 1 is that one hardware block diagram of the embodiments of the present invention and connection are closed System, built-in antenna ANT are received from the NB signal eated dishes without rice or wine, and frequency range is from 600MHz~2700MHz.Directional coupler Coupler carries out amplitude detection for coupling a part of signal, is sent to agc circuit and carries out automatic growth control.Low noise amplification Device LNA considers possibility existing for strong signal for improving overall noise coefficient, which is that can lead directly to , processing is uniformly controlled by agc circuit.Thereafter pass through the optional bandpass filter BPF1~BPF3 of multichannel, filter effect is The NB-IOT for extracting related frequency range eats dishes without rice or wine signal, filters out the clutter of other non-NB signals.Due to the frequency range of different operators deployment Difference, therefore multi-channel filter is selected to be selected, number can also be increased according to real work frequency range.Through filtered NB-IOT Downlink signal enters frequency mixer Mixer, is transformed into the intermediate-freuqncy signal for back-end processing, and IF frequency is selected to be here Local oscillation signal needed for 46.08MHz or 15.36MHz, local oscillator LO provide frequency conversion, according to tuning equation, local oscillator unit need to provide frequency The local oscillation signal of rate range 553.92MHz~2653.92MHz.The output of frequency mixer contains local oscillator, radio frequency and intermediate frequency and various The signal repeatedly responded need to extract useful intermediate-freuqncy signal by bandpass filter BPF4, filter out other noise signals.Through filtering Intermediate-freuqncy signal afterwards passes through voltage control Amplifier VGA, and the gain-controlled voltage of the amplifier is by automatic gain control circuit AGC It provides, effect is the gain for automatically adjusting entire link, and signal is adjusted to the best effort electricity of high speed analog-to-digital converter ADC On flat.High-speed digital-analog converter completes intermediate-freuqncy signal digitlization, and sample frequency is 61.44MHz, passes through digital down converter thereafter DDC carries out I/Q orthogonal transformation, undistorted that digital medium-frequency signal is transformed into the I/Q data that sample rate is 1.92MHz, the number Calculation processing is carried out according to streaming toward CPU, calculates the relevant information of most strong NB cell under current location, and be sent to LCD display Show measurement result.
In above scheme, low-noise amplifier LNA is placed in the front end of system, and front end does not have frequency-selecting device, and antenna is received Signal may include the strong signal of other type base stations, will cause front end in this way and non-linear distortion, noise weak-signal measurement occur Error, or even cannot detect.Dynamic Range is poor, and Fig. 2 is the variant of scheme, and front end band pass filters and low noise are put The position of big device is exchanged, and can solve this problem.
Fig. 2 is the system block diagram for improving the embodiment two of dynamic range.Although the dynamic range of embodiment two obtains Improve, but system noise factor will deteriorate, deterioration degree is related with the Insertion Loss of front-end preselection bandpass filter, the evil of noise coefficient Change can will reduce system sensitivity accordingly.The terminal flexibility of NB-IOT is very high, and the NB-IOT base station signal of system covering is strong Degree detection needs higher sensitivity to guarantee the validity of detection.Therefore, Fig. 3, which is provided, has both highly sensitive and high linearity Scheme.
Fig. 3 is improvement project system block diagram.Fig. 3 is carried out two-stage low-noise amplifier access system front end, unification by AGC Control processing.In the presence of having high reject signal, LNA1 is straight-through, can first filter to signal and amplify again.When needing highly sensitive, LNA1 and LNA2 can be opened simultaneously, and improved system noise factor, sensitivity is provided, below with regard to the function of the modules in figure It is described as follows:
Antenna ANT: it for receiving from the radiofrequency signal eated dishes without rice or wine, is built in equipment, it is complicated to have reduced using for equipment Degree, frequency range cover 600MHz~2700MHz of communications band.
Coupler Coupler: coupling a part of signal power, carries out the automatic growth control of system.
Wave detector DET: detection is carried out to signal power, signal amplitude is converted to voltage, there is agc circuit reception, is carried out The automatic growth control of system.
Bandpass filter BPF1~BPF3: preselecting input signal, the useless clutter of filtering appts.
Low-noise amplifier LNA: amplifying signal, has the characteristics that low noise and High Linear.
Frequency mixer Mixer: radiofrequency signal is down-converted to the intermediate-freuqncy signal for being suitble to processing.
Local oscillator LO: RF local oscillator signal needed for down coversion is provided.
If bandpas filter BPF4: the other noise signals generated after mixing are filtered out, guarantee that the frequency spectrum of intermediate-freuqncy signal is pure Degree.
Voltage control Amplifier VGA: the gain of amplifier is controlled by voltage, and it is certainly that inside, which includes amplifier and attenuator, The core component of dynamic gain control AGC.
Analog-digital converter ADC: being transformed into digital signal for analog intermediate frequency signal, and to guarantee system accuracy, the digit of ADC is extremely Reach 16bits less.
Digital down converter DDC: by digital medium-frequency signal quadrature frequency conversion, orthogonal I/Q baseband signal is generated, and to letter Number rate carries out extraction reduction of speed.
Central processor CPU: calculating i/q signal, while controlling hardware circuit and system configuration, can be used DSP, The chips such as X86.
Digital i/q signal is calculated after entering CPU, the relevant information of extraction NB-IOT base station signal, at the software of CPU It is as follows to manage process:
Continuous capture and storage are carried out to the digital signal from DDC first, according to agreement, guarantee calculates effective every time Property, the data period once stored is not less than 10ms.Then main synchronous search is carried out to the data of storage, needs to carry out frequency later Estimation and calibration partially, to compensate the reference clock frequency error of local clock and base station signal, then carries out auxiliary synchronous fine synchronization, Cell PCI search to strongest correlation value, obtains the PCI value of most strong cell.According to agreement, extract in relevant position with reference to letter Number, the value of RSRP and SNR is calculated, and finally show with number, chart.After completing whole flow process, can repeat more than Process calculates result next time.
Using the equipment that the measurement of NB-IOT base station signal is realized in the support of the utility model, compared with other equipment, tool (1) user is had the advantage that by the direct measurement result of single instrument, without additional attachment.(2) this programme circuit knot Structure is succinct, with strong points, and the power consumption of circuit is lower, and cost is greatly reduced.It is very suitable to the low cost of NB-IOT on-the-spot test Testing requirement.(3) this programme have centainly can scalability, according to algorithm difference, the signal of other network formats may be implemented Measurement.(4) signal processing of this programme uses a large amount of Digital Signal Processings, can be in software and FPGA Reason, further simplifies the complexity of hardware.
In this description, the utility model is described with reference to its specific embodiment.But it is clear that still can be with The spirit and scope that various modification can be adapted and converts without departing from the utility model.Therefore, the description and the appended drawings should be considered as It is illustrative and not restrictive.

Claims (5)

1. a kind of equipment for supporting to realize the measurement of NB-IOT base station signal, which is characterized in that the equipment includes signal acquisition Device, signal filter processing device and signal calculation processing apparatus, the signal filter processing device are adopted with the signal Acquisition means are connected, and the signal calculation processing apparatus is connected with the signal filter processing device.
2. the equipment according to claim 1 for supporting to realize the measurement of NB-IOT base station signal, which is characterized in that the letter Number acquisition device includes:
Antenna, for receiving radiofrequency signal；
Coupler is connected with the antenna；
Wave detector is connected with the coupler and signal calculation processing apparatus.
3. the equipment according to claim 2 for supporting to realize the measurement of NB-IOT base station signal, which is characterized in that the letter Number filter processing device includes:
First low-noise amplifier is connected with the coupler；
Bandpass filter group is connected with first low-noise amplifier；
Second low-noise amplifier is connected with the bandpass filter group；
Frequency mixer is connected with second low-noise amplifier；
Local oscillator is connected with the frequency mixer；
If bandpas filter is connected with the frequency mixer, for filtering out the other noise signals generated after mixing.
4. the equipment according to claim 3 for supporting to realize the measurement of NB-IOT base station signal, which is characterized in that the band Bandpass filter group includes the first bandpass filter, the second bandpass filter and third bandpass filter, the first band logical filter Wave device, the second bandpass filter and third bandpass filter are connected in first low-noise amplifier and the second low noise Between acoustic amplifier.
5. the equipment according to claim 3 for supporting to realize the measurement of NB-IOT base station signal, which is characterized in that the letter Number calculation processing apparatus includes:
Voltage control Amplifier is connected with the if bandpas filter；
Automatic gain control circuit is connected with the voltage control Amplifier and wave detector；
Analog-digital converter is connected with the voltage control Amplifier；
Digital down converter is connected with the analog-digital converter；
Central processing unit is connected with the digital down converter.
CN201920025886.3U 2019-01-07 2019-01-07 Support the equipment for realizing the measurement of NB-IOT base station signal Active CN209593767U (en)

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Application Number Priority Date Filing Date Title
CN201920025886.3U CN209593767U (en) 2019-01-07 2019-01-07 Support the equipment for realizing the measurement of NB-IOT base station signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920025886.3U CN209593767U (en) 2019-01-07 2019-01-07 Support the equipment for realizing the measurement of NB-IOT base station signal

Publications (1)

Publication Number Publication Date
CN209593767U true CN209593767U (en) 2019-11-05

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Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
CN (1) CN209593767U (en)

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Address after: Block C, No. 7, Lane 205, Gaoji Road, Songjiang District, Shanghai, 201601

Patentee after: Chuangyuan Xinke (Shanghai) Technology Co.,Ltd.

Address before: 201601 building 6, 351 sizhuan Road, Sijing Town, Songjiang District, Shanghai

Patentee before: TRANSCOM INSTRUMENTS Co.,Ltd.

CP03 Change of name, title or address