CN205961090U - NB ioT pilot signal generating device - Google Patents
NB ioT pilot signal generating device Download PDFInfo
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- CN205961090U CN205961090U CN201620937770.3U CN201620937770U CN205961090U CN 205961090 U CN205961090 U CN 205961090U CN 201620937770 U CN201620937770 U CN 201620937770U CN 205961090 U CN205961090 U CN 205961090U
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Abstract
The utility model relates to a thing communication network technical field, concretely relates to to NB ioT pilot signal generating device, its characterized in that: NB the output that ioT pilot frequency baseband produced the unit links to each other with intermediate frequency the control unit input, an input of first detector is connected to intermediate frequency the control unit's output, and the output of first local oscillator unit is connected to another input of first detector, and an input of another first detector is connected to the output of first detector, and another input of another first detector links to each other with second local oscillator unit and exports radiofrequency signal, the output of another first detector connects gradually controllable filtering unit input, gains and takes care of unit input, fixed - gain amplifier unit input, and high -power radiofrequency signal is exported to the output of fixed - gain amplifier unit. Compared with the prior art, the utility model, is NB satisfied in multistage frequency conversion through radio -frequency channel the frequency coverage of ioT signal.
Description
Technical field
This utility model is related to Internet of Things communication technical field and in particular to filling to a kind of NB-IoT pilot signal
Put.
Background technology
Internet of Things market potential is huge, will enter extensive eruptive growth.Hasten towards saturation mass marketing day at present,
Lead to operator's profit increasing option it would be highly desirable to seek new profit growth point, according to the address prediction of Mai Kenxi Deng Duojia mechanism,
Following 5-10 Internet of Things connects number and market scale will occur extensive eruptive growth.All things on earth interconnection has become global operation
Business, the grand strategy direction of the positive layout of science-and-technology enterprise and industry alliance.The population of Cellular Networks covering the whole world 90%, covers at present
The geographical position more than 50% for the lid.Based on existing cellular network, operator can provide a very competitive Internet of Things
Network technology is it is simply that NB-IoT.NB-IoT, in aspect best performances such as covering, power consumption, cost, connection numbers, best suits LPWA class industry
Business demand.
Test is the important ring in wireless communication industry chain, and for a long time, testing meter and instrument is restriction China all the time
The bottleneck of communications industry development.In terms of test equipment, China is even more almost blank, and test instrunment is substantially Keysight
Company, R/S company etc. are monopolized.NB-IoT industry is in research and development boost phase, but, during industry development, tester
Table still lags behind the development of miscellaneous equipment and system, and the NB-IoT class testing instrument that commercially can see at present is at present very
Difficulty is seen, and equipment and system manufacturer are all to be built by multiple instrument combines at present, therefore promotes the NB- of NB-IoT technology development
IoT class instrument is also to be developed.The work of NB-IoT (R13) standard formulation at present has been freezed, but NB-IoT will obtain business and become
Work(, in addition it is also necessary to the early stage test Solution synchronous with standard development, proposes bigger challenge to measuring instrumentss.Therefore research and develop
Going out a NB-IoT pilot signal occurs instrument very urgent.
Content of the invention
The purpose of this utility model is to provide a kind of NB-IoT pilot signal generating meanss, morning when conveniently developing
Phase tests.
For achieving the above object, this utility model design a kind of NB-IoT pilot signal generating meanss it is characterised in that：Bag
Include the NB-IoT pilot tone base band generation unit producing for NB-IoT pilot signal base band, NB-IoT pilot tone base band generation unit
Outfan is connected with the intermediate frequency control unit input for interpolation frequency conversion, digital-to-analogue conversion；The outfan of intermediate frequency control unit is even
Connect an input of frequency mixer, another input of frequency mixer connects the outfan of the first local oscillator unit, frequency mixer defeated
Go out the input that end connects another frequency mixer, another input of another frequency mixer is connected with the second local oscillator unit output
Radiofrequency signal；The outfan of another frequency mixer is sequentially connected controlled filter unit input, the gain for adjusting channel gain
Conditioning unit input, the fixed gain amplifying unit input for high-power amplification, the output of fixed gain amplifying unit
End output high-power RF signal.
The intermediate frequency carrier frequency of described intermediate frequency control unit output is 35MHz, and intermediate frequency output is -5dBm.
The first described local oscillator unit is that point frequency exports, and output frequency is fixed as 435MHz, output power range is-
20dBm～0dBm.
The radio frequency output frequency of the described radiofrequency signal of the second local oscillator unit output is 700MHz～2800MHz, is used for
NB-IoT pilot signal and the frequency coverage of other communication standard pilot signal transmission, power output scope be -20dBm～+
45dBm.
This utility model compared with prior art, meets the frequency of NB-IoT signal by the multistage frequency conversion of radio-frequency channel
Coverage, realized by adjustable tracking filter height mutually make an uproar, the performance of low spurious, using Tunable Channels gain and fixing increase
Benefit is amplified and is required meeting the covering on a large scale of NB-IoT pilot signal, produces arrowband master sync signal, arrowband auxiliary synchronous signals
And the baseband signal of narrowband reference signal, meet the search need of NB-IoT terminal-pair base station pilot signals and terminal connects
The calibration requirements of receipts machine；In the case of high-power amplification, effectively improve signal output quality, simultaneously frequency coverage except with
Outside the 800MHz～1990MHz of NB-IoT, cover 700MHz～2800MHz, provide hardware for other communication standards empty
Between.
Brief description
Fig. 1 is the theory diagram of this utility model circuit in an embodiment.
Fig. 2 is the time frequency distribution map of the narrowband reference signal of NB-IoT in this utility model.
Fig. 3 is the time-domain diagram of NB-IoT pilot signal transmission in this utility model.
Fig. 4 is the frequency domain figure of NB-IoT pilot signal transmission in this utility model.
Specific embodiment
In conjunction with accompanying drawing, this utility model is described further.
Embodiment 1
As shown in figure 1, a kind of NB-IoT pilot signal generating meanss, including produce for NB-IoT pilot signal base band
NB-IoT pilot tone base band generation unit, the outfan of NB-IoT pilot tone base band generation unit with for interpolation frequency conversion, digital-to-analogue conversion
Intermediate frequency control unit input be connected；The outfan of intermediate frequency control unit connects an input of frequency mixer 1, frequency mixer 1
Another input connect the outfan of the first local oscillator unit, the outfan of frequency mixer 1 connect another frequency mixer 2 one is defeated
Enter end, another input of another frequency mixer 2 is connected with the second local oscillator unit and exports radiofrequency signal；Another frequency mixer 2 defeated
Go out end and be sequentially connected controlled filter unit input, for adjusting the gain conditioning unit input of channel gain, being used for big work(
The fixed gain amplifying unit input that rate is amplified, the outfan output high-power RF signal of fixed gain amplifying unit.
Further, the intermediate frequency carrier frequency of described intermediate frequency control unit output is 35MHz, intermediate frequency output is-
5dBm.
Further, the first described local oscillator unit is that point frequency exports, and output frequency is fixed as 435MHz, output model
Enclose for -20dBm～0dBm.
Further, the radio frequency output frequency of the radiofrequency signal of described second local oscillator unit output be 700MHz～
2800MHz, for the frequency coverage of NB-IoT pilot signal and other communication standard pilot signal transmission, power output scope
For -20dBm～+45dBm.
As shown in figure 3, this figure is the time-domain diagram of this utility model NB-IoT pilot signal transmission, mid frequency is
1950MHz, sweep time is a radio frames (10ms), test be NB-IoT subframe symbol distribution, and time-domain signal
Power.
As shown in figure 4, this figure is the frequency domain figure of this utility model NB-IoT pilot signal transmission, mid frequency is
1950MHz, sweep length be 1MHz, test be NB-IoT channel width distribution.
In sum, this utility model meets the frequency coverage model of NB-IoT signal by the multistage frequency conversion of radio-frequency channel
Enclose, realized by adjustable tracking filter height mutually make an uproar, the performance of low spurious, amplified using Tunable Channels gain and fixed gain
Covering on a large scale to meet NB-IoT pilot signal requires, and produces arrowband master sync signal, arrowband auxiliary synchronous signals and narrow
With the baseband signal of reference signal, meet the search need of NB-IoT terminal-pair base station pilot signals and terminal receiver
Calibration requirements.This utility model, in the case of high-power amplification, effectively improves signal output quality, and frequency coverage is simultaneously
Other communication standards provide hardware space.
Claims (4)
1. a kind of NB-IoT pilot signal generating meanss it is characterised in that：Including produce for NB-IoT pilot signal base band
NB-IoT pilot tone base band generation unit, the outfan of NB-IoT pilot tone base band generation unit with for interpolation frequency conversion, digital-to-analogue conversion
Intermediate frequency control unit input be connected；The outfan of intermediate frequency control unit connects an input of frequency mixer (1), frequency mixer
(1) another input connects the outfan of the first local oscillator unit, and the outfan of frequency mixer (1) connects another frequency mixer (2)
An input, another input of another frequency mixer (2) be connected with the second local oscillator unit output radiofrequency signal；Another mixed
The outfan of frequency device (2) is sequentially connected controlled filter unit input, the gain conditioning unit input for adjusting channel gain
End, the fixed gain amplifying unit input for high-power amplification, the outfan output of fixed gain amplifying unit is high-power
Radiofrequency signal.
2. a kind of NB-IoT pilot signal generating meanss according to claim 1 it is characterised in that：Described intermediate frequency controls
The intermediate frequency carrier frequency of unit output is 35MHz, and intermediate frequency output is -5dBm.
3. a kind of NB-IoT pilot signal generating meanss according to claim 1 it is characterised in that：The first described local oscillator
Unit is that point frequency exports, and output frequency is fixed as 435MHz, and output power range is -20dBm～0dBm.
4. a kind of NB-IoT pilot signal generating meanss according to claim 1 it is characterised in that：The second described local oscillator
Unit output radiofrequency signal radio frequency output frequency be 700MHz～2800MHz, for NB-IoT pilot signal and other
The frequency coverage of communication standard pilot signal transmission, power output scope is -20dBm～+45dBm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620937770.3U CN205961090U (en) | 2016-08-25 | 2016-08-25 | NB ioT pilot signal generating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620937770.3U CN205961090U (en) | 2016-08-25 | 2016-08-25 | NB ioT pilot signal generating device |
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| Publication Number | Publication Date |
|---|---|
| CN205961090U true CN205961090U (en) | 2017-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620937770.3U Active CN205961090U (en) | 2016-08-25 | 2016-08-25 | NB ioT pilot signal generating device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106130573A (en) * | 2016-08-25 | 2016-11-16 | 上海创远仪器技术股份有限公司 | NB IoT pilot signal generating means and pilot signal method for generation thereof |
| CN109298282A (en) * | 2017-12-12 | 2019-02-01 | 上海创远仪器技术股份有限公司 | A kind of method of polymorphic type cable connection system accurate fault location |
-
2016
- 2016-08-25 CN CN201620937770.3U patent/CN205961090U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106130573A (en) * | 2016-08-25 | 2016-11-16 | 上海创远仪器技术股份有限公司 | NB IoT pilot signal generating means and pilot signal method for generation thereof |
| CN106130573B (en) * | 2016-08-25 | 2019-11-15 | 上海创远仪器技术股份有限公司 | The pilot signal method for generation of NB-IoT pilot signal generating device |
| CN109298282A (en) * | 2017-12-12 | 2019-02-01 | 上海创远仪器技术股份有限公司 | A kind of method of polymorphic type cable connection system accurate fault location |
| CN109298282B (en) * | 2017-12-12 | 2021-05-07 | 上海创远仪器技术股份有限公司 | Method for accurately positioning faults of multi-type cable connection system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Block C, No. 7, Lane 205, Gaoji Road, Songjiang District, Shanghai, 201601 Patentee after: Chuangyuan Xinke (Shanghai) Technology Co.,Ltd. Address before: 200233 6th floor, Building 29, 69 Guiqing Road, Xuhui District, Shanghai Patentee before: TRANSCOM INSTRUMENTS Co.,Ltd. |
|
| CP03 | Change of name, title or address |