CN206099989U - 5G distributing type base station antenna radio frequency optical transmission system - Google Patents
5G distributing type base station antenna radio frequency optical transmission system Download PDFInfo
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- CN206099989U CN206099989U CN201621025973.1U CN201621025973U CN206099989U CN 206099989 U CN206099989 U CN 206099989U CN 201621025973 U CN201621025973 U CN 201621025973U CN 206099989 U CN206099989 U CN 206099989U
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Abstract
The utility model relates to a 5G distributing type base station antenna radio frequency optical transmission system, include the transmitting terminal and the receiving terminal that link to each other through transmission fiber, its transmitting terminal, the first output of two frequency dividers links to each other with the input of optical sender, the input of circulator links to each other with the output of optical sender, the second output of two frequency dividers links to each other with up converter's intermediate frequency end, down converter's local oscillator end links to each other with up converter's radio -frequency head, down converter's intermediate frequency end links to each other with an optical receiver's output, an optical receiver's input links to each other with the output of circulator, down converter's radio -frequency head links to each other with the input of optical sender, its receiving terminal, semi -reflector's output and the 2nd optical receiver's input link to each other, semi -reflector's input passes through transmission fiber and holds continuously with the receiving and dispatching of circulator, two frequency dividers and up converter's input all links to each other with radio frequency incoming signal, the 2nd optical receiver's output radio frequency output signal.
Description
Technical field
This utility model is related to a kind of 5G distributed base stations antenna rf optical transmission system, belongs to a kind of frequency microwave transmission
Method field.
Background technology
Important component part of the new generation broadband wireless mobile communication net as generation information infrastructure, to national Jing
The development of Ji, society, culture and Defence business is with huge impetus.As 4G enters scale commercial stage, towards
The new generation broadband wireless mobile communications such as the 4G enhancings in the year two thousand twenty and future, 5G and rear 5G have become global development focus.Wherein,
Large-scale antenna array and distributed aerial array are the main arrangement scenes of 5G base stations.In distributed scene, radiofrequency signal
Fiber-optic transfer have uniqueness technical advantage.With the continuous development of optical fiber transmission technique, photoelectric device function it is continuous complete
Kind, photoelectric technology has played increasingly important function in current various electronic systems.As fibre-optic transmission system (FOTS) has body
Product it is little, lightweight, loss little, long transmission distance, electromagnetism interference, with the high advantage of roomy and channel capacity, be solve tradition
Microwave and millimeter wave Transmission system exist problems provide good technological means so that optical fiber transmission technique communication
Obtain increasingly being widely applied in system.
In radio frequency fiber optic transmission system, the phase place of output signal is directly proportional to its time delay.The size of propagation delay time and permitted
Multifactor correlation, such as incident wavelength, optical fiber structure and ambient temperature etc., in these factors, ambient temperature it is random
Fluctuations are consumingly affected the refractive index of optical fiber, and cause the time delay of signal to be drifted about, and then produce phase fluctuation.Radio frequency is believed
Number frequency is higher, and its phase fluctuation is sometimes also very big, has had a strong impact on the coherent performance of the electronic systems such as communication, for this purpose, surely
The phase place for determining radio frequency fiber optic long range propagation is particularly critical to the wideband electronic communication system such as 5G.
It is at present general using the method for automatically controlled delay line is increased in optical link adjusting phase drift, the radio frequency letter of input
Number being exported after fiber-optic transfer by optical sender, the reflection of part signal being carried out in receiving terminal, reflected signal is again through optical fiber
Transmitting terminal is transmitted back to, and next signal is will reflect back in transmitting terminal carries out phase demodulation with signal is sent, and obtains phase shift value, through number
The retardation of word signal processing pilot delay line again, high cost, phase stabilization precision are low, it is impossible to meet 5G communication equipments radio frequency biography
Defeated requirement.
Utility model content
A kind of phase stabilization high precision, and the 5G distributed base stations of low cost are provided for problem above this utility model
Antenna rf optical transmission system.
In order to solve above technical problem this utility model there is provided a kind of 5G distributed base stations antenna rf optical transport system
System, including the transmitting terminal and receiving terminal that are connected by Transmission Fibers.The transmitting terminal includes two-divider, upconverter, lower change
Frequency device, optical sender, circulator and photoreceiver；First outfan of the two-divider and the input phase of optical sender
Even；The input of the circulator is connected with the outfan of optical sender；Second outfan of the two-divider and up-conversion
The intermediate frequency end of device is connected；The local oscillator end of the low-converter is connected with the radio-frequency head of upconverter；The intermediate frequency of the low-converter
End is connected with the outfan of photoreceiver；The input of the photoreceiver is connected with the outfan of circulator；The down coversion
The radio-frequency head of device is connected with the input of optical sender.The receiving terminal includes photoreceiver and half-reflecting mirror；The half reflection
The outfan of mirror is connected with the input of photoreceiver；The input of the half-reflecting mirror is by Transmission Fibers and the receipts of circulator
Originator is connected；The input of the two-divider and upconverter is connected with radio-frequency input signals；Second photoreceiver
Outfan output radio frequency output signal.
This utility model cost of implementation is low：This utility model has abandoned the automatically controlled delay line of high cost, with a large amount of at present
Using integrated two divided-frequency, up-conversion, down coversion chip to reach with automatically controlled delay line come the steady phase effect realized.Phase place
Lasting accuracy is high：This utility model uses the RF signal processing technologies such as two divided-frequency, up-conversion and the down coversion of radio frequency, it is to avoid
Complicated digital signal processing, timely tracing compensation transmit the change of phase drift, using this utility model 10GHz radio frequencies
After 20 km transmissions, 60 minutes phase drifts control, within 3 degree, to have reached the requirement that radio frequency is surely mutually transmitted signal.
Description of the drawings
Transmitting procedure flow charts of the Fig. 1 for this utility model system.
Fig. 2 is phase distortion precompensation flow chart of steps in Fig. 1.
Fig. 3 is the 5G distributed base station antenna rf optical transmission system theory diagrams for realizing this utility model method.
Fig. 4 is the phase drift result figure that 5G distributed base station antenna rf optical transports are carried out using prior art.
Fig. 5 is the phase drift result figure that 5G distributed base station antenna rf optical transports are carried out using this utility model.
Specific embodiment
Below in conjunction with the accompanying drawings this utility model is described in further detail.
As shown in figure 3, this utility model provide it is a kind of realize 5G distributed base station antenna rf optical transmission methods be
System, including the transmitting terminal 100 and receiving terminal 200 that are connected by Transmission Fibers 300.
The transmitting terminal includes two-divider 101, upconverter 102, low-converter 103, optical sender 104, circulator
105 and first photoreceiver 106；First outfan of the two-divider 101 is connected with the input of optical sender 104；Institute
The input for stating circulator 105 is connected with the outfan of optical sender 104；Second outfan of the two-divider 101 with it is upper
The intermediate frequency end of converter 102 is connected；The local oscillator end of the low-converter 103 is connected with the radio-frequency head of upconverter 102；Under described
The intermediate frequency end of converter 103 is connected with the outfan of the first photoreceiver 106；The input of first photoreceiver 106 with
The outfan of circulator 105 is connected；The radio-frequency head of the low-converter 103 is connected with the input of optical sender 104.
The receiving terminal includes the second photoreceiver 201 and half-reflecting mirror 202；The outfan of the half-reflecting mirror 202 with
The input of the second photoreceiver 201 is connected；The input of the half-reflecting mirror 202 is by Transmission Fibers 300 and circulator 105
Sending and receiving end be connected.
The input of the two-divider 101 and upconverter 102 is connected with radio-frequency input signals；Second light connects
The outfan output radio frequency output signal of receipts machine 201.
The transmitting procedure (as shown in Figure 1) of this utility model system：
The first step：Phase pushing figure is obtained：Using the two divided-frequency signal of radio-frequency input signals in optical fiber round-trip transmission, obtain
The phase pushing figure of radio frequency fiber optic transmission；
Second step：Phase distortion is pre-compensated for：Radio-frequency input signals and local two divided-frequency signal are carried out becoming in transmitting terminal
Frequently, obtain the signal of 1.5 overtones bands, then with the round-trip transmission two divided-frequency signal down coversion containing phase pushing figure, obtain phase place
Distortion pre-compensates for radiofrequency signal；
3rd step：The acquisition of steady phase signals：In receiving terminal, by the phase distortion precompensation radio frequency letter through long range propagation
Number demodulation, obtain the radio frequency output signal of phase stabilization.
By two divided-frequency signal (0.5F frequencies) round-trip transmission in a fiber, its transmission path is radio signal transmission path
2 times, its transmission frequency is the half of radio frequency signal frequency, and both are comprehensive, can just obtain radiofrequency signal one-way transmission
Phase drift amount, the phase drift amount define the radiofrequency signal of predistortion, through optical fiber in transmitting terminal through down-converted
Transmission, the signal of predistortion just compensate for the transmission distortion of optical fiber, just obtain the radio frequency letter of phase stabilization in receiving terminal
Number.
Described phase distortion precompensation specifically includes herein below (as shown in Figure 2)：
In transmitting terminal, radio-frequency input signals of the frequency for F, it is divided into after 2 frequency dividers obtain the signal that frequency is 0.5F
Two-way：All the way with the radio-frequency input signals up-conversion that frequency is F, the addition of signal frequency is realized in upconverter, frequency is obtained
Signal of the rate for 1.5F；Optical sender is sent on another road, and the signal modulation of frequency 0.5F is sent into optical fiber in laser carrier is carried out
Transmission；
In receiving terminal, using half-reflecting mirror reflecting part radio frequency optical modulation signal, the circulator of transmitting terminal is reflexed to, then is entered
Enter photoreceiver, recover the signal that frequency is 0.5F, 0.5F signals now just contain Transmission Fibers by the change of various environment
Changing affects and the phase drift amount of the radiofrequency signal of generation；In the down coversion of transmitting terminal, should the 0.5F containing phase drift amount
Signal is subtracted each other with the signal frequency of 1.5F, has obtained frequency for F, the signal of advance subduction Transmission Fibers phase drift；This is believed
Number optical sender is also fed into, is modulated on laser carrier and is transmitted, the radio frequency of frequency F is recovered by photoreceiver in receiving terminal
Signal.
As shown in figure 4, being the phase drift result figure that long range radio signal transmission is carried out using prior art, frequency is
The radiofrequency signal of 10GHz, through 20 kilometers of fiber-optic transfer, using prior art, in 60 minutes, phase drift exceedes
5000 degree.
As shown in figure 5, be the phase drift result figure that long range radio signal transmission is carried out using this utility model, frequency
The radiofrequency signal of 10GHz is similarly, 20 kilometers of fiber-optic transfer is also passed through, using technology of the present utility model, at 60 minutes
In time, phase drift is controlled within 3 degree, is realized the steady of radiofrequency signal and is mutually transmitted.
Embodiment of the present utility model is not limited by examples detailed above, and one of ordinary skill in the art should manage
Solution, it is other any to should be without departing from the modification made under spirit of the present utility model and principle or equivalent
The substitute mode of effect, is included within protection domain of the present utility model.
Claims (1)
1. a kind of 5G distributed base stations antenna rf optical transmission system, it is characterised in that include being connected by Transmission Fibers (300)
Transmitting terminal (100) and receiving terminal (200),
The transmitting terminal includes two-divider (101), upconverter (102), low-converter (103), optical sender (104), ring
Shape device (105) and the first photoreceiver (106)；First outfan of the two-divider (101) is defeated with optical sender (104)
Enter end to be connected；The input of the circulator (105) is connected with the outfan of optical sender (104)；The two-divider (101)
The second outfan be connected with the intermediate frequency end of upconverter (102)；The local oscillator end of the low-converter (103) and upconverter
(102) radio-frequency head is connected；The intermediate frequency end of the low-converter (103) is connected with the outfan of the first photoreceiver (106)；Institute
The input for stating the first photoreceiver (106) is connected with the outfan of circulator (105)；The radio frequency of the low-converter (103)
End is connected with the input of optical sender (104)；
The receiving terminal includes the second photoreceiver (201) and half-reflecting mirror (202)；The outfan of the half-reflecting mirror (202)
It is connected with the input of the second photoreceiver (201)；The input of the half-reflecting mirror (202) by Transmission Fibers (300) with
The sending and receiving end of circulator (105) is connected；
The input of the two-divider (101) and upconverter (102) is connected with radio-frequency input signals；Second light connects
The outfan output radio frequency output signal of receipts machine (201).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621025973.1U CN206099989U (en) | 2016-08-31 | 2016-08-31 | 5G distributing type base station antenna radio frequency optical transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621025973.1U CN206099989U (en) | 2016-08-31 | 2016-08-31 | 5G distributing type base station antenna radio frequency optical transmission system |
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| Publication Number | Publication Date |
|---|---|
| CN206099989U true CN206099989U (en) | 2017-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621025973.1U Withdrawn - After Issue CN206099989U (en) | 2016-08-31 | 2016-08-31 | 5G distributing type base station antenna radio frequency optical transmission system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106230511A (en) * | 2016-08-31 | 2016-12-14 | 南京恩瑞特实业有限公司 | 5G distributed base station antenna rf optical transmission method and system |
| CN108322413A (en) * | 2017-12-29 | 2018-07-24 | 中国电子科技集团公司第五十五研究所 | A kind of eat dishes without rice or wine digital pre-distortion implementation method and its digital pre-distortion system for 5G millimeter wave active phase aerial arrays |
-
2016
- 2016-08-31 CN CN201621025973.1U patent/CN206099989U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106230511A (en) * | 2016-08-31 | 2016-12-14 | 南京恩瑞特实业有限公司 | 5G distributed base station antenna rf optical transmission method and system |
| CN108322413A (en) * | 2017-12-29 | 2018-07-24 | 中国电子科技集团公司第五十五研究所 | A kind of eat dishes without rice or wine digital pre-distortion implementation method and its digital pre-distortion system for 5G millimeter wave active phase aerial arrays |
| CN108322413B (en) * | 2017-12-29 | 2020-11-17 | 中国电子科技集团公司第五十五研究所 | Air interface digital predistortion method and system for 5G millimeter wave active antenna array |
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| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170412 Effective date of abandoning: 20180717 |
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| AV01 | Patent right actively abandoned |