CN106230511A - 5G distributed base station antenna rf optical transmission method and system - Google Patents
5G distributed base station antenna rf optical transmission method and system Download PDFInfo
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- CN106230511A CN106230511A CN201610770832.0A CN201610770832A CN106230511A CN 106230511 A CN106230511 A CN 106230511A CN 201610770832 A CN201610770832 A CN 201610770832A CN 106230511 A CN106230511 A CN 106230511A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
- H04B10/25752—Optical arrangements for wireless networks
- H04B10/25753—Distribution optical network, e.g. between a base station and a plurality of remote units
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Abstract
The present invention relates to a kind of 5G distributed base station antenna rf optical transmission method and system, its method is: phase pushing figure obtains: uses the two divided-frequency signal of radio-frequency input signals in optical fiber round-trip transmission, obtains the phase pushing figure of radio frequency fiber optic transmission；Phase distortion pre-compensates for: at transmitting terminal, with local two divided-frequency signal, radio-frequency input signals is carried out up-conversion, obtains 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 distortion precompensation radiofrequency signal；The acquisition of steady phase signals: at receiving terminal, the phase distortion through long range propagation is pre-compensated for radiofrequency signal demodulation, obtains the radio frequency output signal of phase stabilization.Its decorum includes transmitting terminal and the receiving terminal being connected by Transmission Fibers, and described transmitting terminal includes two-divider, upconverter, low-converter, optical sender, circulator and photoreceiver；Described receiving terminal includes photoreceiver and half-reflecting mirror；Phase stabilization precision of the present invention is high, and low cost.
Description
Technical field
The present invention relates to a kind of 5G distributed base station antenna rf optical transmission method and system, belong to a kind of frequency microwave and pass
Transmission method field.
Background technology
New generation broadband wireless mobile communication net is as the important component part of generation information infrastructure, to national warp
The development of Ji, society, culture and Defence business has huge impetus.Along with 4G enters scale commercial stage, towards
The new generation broadband wireless mobile communications such as the 4G enhancing 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 station.In distributed scene, radiofrequency signal
Fiber-optic transfer have uniqueness technical advantage.Along with the development of optical fiber transmission technique, photoelectric device function the completeest
Kind, photoelectric technology has played increasingly important function in current various electronic systems.Owing to fibre-optic transmission system (FOTS) has body
Long-pending little, lightweight, little, that long transmission distance, electromagnetism interference, band roomy and channel capacity high advantage is lost, for solving tradition
Microwave and millimeter wave transmission system exist problems provide good technological means so that optical fiber transmission technique communication
System obtains increasingly be widely applied.
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 relevant, such as incident wavelength, optical fiber structure and ambient temperature etc., in these factors, ambient temperature random
Fluctuations will affect the refractive index of optical fiber consumingly, and causes the time delay of signal to be drifted about, and then produces phase fluctuation.Radio frequency is believed
Number frequency is the highest, and its phase fluctuation is the biggest, has had a strong impact on the coherent performance of communication isoelectronic series system, to this end, surely
The phase place determining radio frequency fiber optic long range propagation is particularly critical to wideband electronic communication systems such as 5G.
Typically using the method increasing automatically controlled delay line in optical link to regulate phase drift at present, the radio frequency of input is believed
Number by optical sender export after fiber-optic transfer, carry out the reflection of part signal at receiving terminal, reflected signal is again through optical fiber
Being transmitted back to transmitting terminal, the signal that will reflect back at transmitting terminal carries out phase demodulation with sending signal, obtains phase shift value, through number
The retardation of word signal processing pilot delay line again, cost is high, and phase stabilization precision is low, it is impossible to meets 5G communication equipment radio frequency and passes
Defeated requirement.
Summary of the invention
A kind of phase stabilization precision is the invention provides high for problem above, and the 5G distributed base station antenna of low cost
Radio frequency optical transmission method and system.
A kind of 5G distributed base station antenna rf optical transmission method is the invention provides in order to solve above technical problem,
Comprise the steps:
The first step: phase pushing figure obtains: use 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 pre-compensates for: become on radio-frequency input signals and local two divided-frequency signal are carried out by 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 precompensation radiofrequency signal；
3rd step: the acquisition of steady phase signals: at receiving terminal, the phase distortion through long range propagation is pre-compensated for radio frequency letter
Number demodulation, obtain the radio frequency output signal of phase stabilization.
Described phase distortion precompensation specifically includes herein below: at transmitting terminal, frequency is the radio-frequency input signals of F,
Two-way it is divided into: a road and frequency are the radio-frequency input signals up-conversion of F after 2 frequency dividers obtain the signal that frequency is 0.5F,
In upconverter, realize the addition of signal frequency, obtain the signal that frequency is 1.5F；Optical sender is sent on another road, by frequency
The signal of 0.5F is modulated at laser carrier feeding optical fiber and is transmitted.At receiving terminal, utilize half-reflecting mirror reflecting part radio frequency light
Modulated signal, reflexes to the circulator of transmitting terminal, enters back into photoreceiver, recovers the signal that frequency is 0.5F, now
0.5F signal just contains Transmission Fibers to be affected by various environmental changes and the phase drift amount of radiofrequency signal that produces；Launching
In the down coversion of end, the 0.5F signal that should contain phase drift amount subtracts each other with the signal frequency of 1.5F, and having obtained frequency is F, in advance
First reduce the signal of Transmission Fibers phase drift；This signal is also fed into optical sender, is modulated on laser carrier and is transmitted,
The radiofrequency signal of frequency F is recovered by photoreceiver at receiving terminal.
A kind of 5G distributed base station antenna rf optical transmission system, including the transmitting terminal being connected by Transmission Fibers and reception
End.Described transmitting terminal includes two-divider, upconverter, low-converter, optical sender, circulator and photoreceiver；Described two
First outfan of frequency divider is connected with the input of optical sender；The input of described circulator and the outfan of optical sender
It is connected；Second outfan of described two-divider is connected with the intermediate frequency end of upconverter；The local oscillator end of described low-converter is with upper
The radio-frequency head of converter is connected；The intermediate frequency end of described low-converter is connected with the outfan of photoreceiver；Described photoreceiver
Input is connected with the outfan of circulator；The radio-frequency head of described low-converter is connected with the input of optical sender.Described connect
Receiving end includes photoreceiver and half-reflecting mirror；The outfan of described half-reflecting mirror is connected with the input of photoreceiver；Described half
The input of reflecting mirror is connected with the sending and receiving end of circulator by Transmission Fibers；Described two-divider and the input of upconverter
All it is connected with radio-frequency input signals；The outfan output radio frequency output signal of described second photoreceiver.
The present invention realizes low cost: the present invention has abandoned the automatically controlled delay line that cost is high, uses the most a large amount of collection used
The two divided-frequency of one-tenthization, up-conversion, down coversion chip reach the steady phase effect realized with automatically controlled delay line.Phase stabilization precision
High: the present invention uses the RF signal processing technology such as the two divided-frequency of radio frequency, up-conversion and down coversion, it is to avoid complicated numeral letter
Number processing procedure, the change of timely tracing compensation transmission phase drift, use 10GHz radiofrequency signal of the present invention through 20 kilometers of biographies
After defeated, 60 minutes phase drifts control, within 3 degree, to have reached the requirement that radio frequency transmits mutually.
Accompanying drawing explanation
Fig. 1 is 5G distributed base station antenna rf optical transmission method flow chart of the present invention.
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 diagram realizing the inventive method.
Fig. 4 is the phase drift result figure using prior art to carry out 5G distributed base station antenna rf optical transport.
Fig. 5 is the phase drift result figure using the present invention to carry out 5G distributed base station antenna rf optical transport.
Detailed description of the invention
The present invention is described in further detail below in conjunction with the accompanying drawings.
As it is shown in figure 1, the invention provides a kind of 5G distributed base station antenna rf optical transmission method, including walking as follows
Rapid:
The first step: phase pushing figure obtains: use 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 pre-compensates for: become on radio-frequency input signals and local two divided-frequency signal are carried out by 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 precompensation radiofrequency signal；
3rd step: the acquisition of steady phase signals: at receiving terminal, the phase distortion through long range propagation is pre-compensated for radio frequency letter
Number demodulation, obtain the radio frequency output signal of phase stabilization.
By two divided-frequency signal (0.5F frequency) 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, just can obtain radiofrequency signal one-way transmission
Phase drift amount, this phase drift amount through down-converted, defines the radiofrequency signal of predistortion, through optical fiber at transmitting terminal
Transmission, the signal of predistortion just compensate for the transmission distortion of optical fiber, receiving terminal just obtained phase stabilization radio frequency letter
Number.
Described phase distortion pre-compensates for and specifically includes herein below (as shown in Figure 2):
At transmitting terminal, frequency is the radio-frequency input signals of F, is divided into after 2 frequency dividers obtain the signal that frequency is 0.5F
Two-way a: road and frequency are the radio-frequency input signals up-conversion of F, realize the addition of signal frequency in upconverter, obtains frequency
Rate is the signal of 1.5F；Optical sender is sent on another road, the signal of frequency 0.5F is modulated at laser carrier feeding optical fiber and carries out
Transmission；
At receiving terminal, utilize half-reflecting mirror reflecting part radio frequency optical modulation signal, reflex to the circulator of transmitting terminal, then enter
Entering photoreceiver, recover the signal that frequency is 0.5F, 0.5F signal now just contains Transmission Fibers and is become by various environment
The phase drift amount of the radiofrequency signal changing impact and produce；In the down coversion of transmitting terminal, should be containing the 0.5F of phase drift amount
Signal subtracts each other with the signal frequency of 1.5F, and having obtained frequency is F, reduces the signal of Transmission Fibers phase drift in advance；By this letter
Number it is also fed into optical sender, is modulated on laser carrier and is transmitted, recovered the radio frequency of frequency F at receiving terminal by photoreceiver
Signal.
As shown in Figure 3, it is achieved the system of 5G distributed base station antenna rf optical transmission method, including passing through Transmission Fibers
300 transmitting terminal 100 being connected and receiving terminals 200,
Described transmitting terminal includes two-divider 101, upconverter 102, low-converter 103, optical sender 104, circulator
105 and photoreceiver 106；First outfan of described two-divider 101 is connected with the input of optical sender 104；Described ring
The input of shape device 105 is connected with the outfan of optical sender 104；Second outfan of described two-divider 101 and up-conversion
The intermediate frequency end of device 102 is connected；The local oscillator end of described low-converter 103 is connected with the radio-frequency head of upconverter 102；Described down coversion
The intermediate frequency end of device 103 is connected with the outfan of photoreceiver 106；The input of described photoreceiver 106 is defeated with circulator 105
Go out end to be connected；The radio-frequency head of described low-converter 103 is connected with the input of optical sender 104；
Described receiving terminal includes photoreceiver 201 and half-reflecting mirror 202；The outfan of described half-reflecting mirror 202 connects with light
The input of receipts machine 201 is connected；The input of described half-reflecting mirror 202 is by the sending and receiving end of Transmission Fibers 300 with circulator 105
It is connected；
Described two-divider 101 is all connected with radio-frequency input signals with the input of upconverter 102；Described second light connects
The outfan output radio frequency output signal of receipts machine 201.
As shown in Figure 4, for using prior art to carry out the phase drift result figure of distance radio signal transmission, frequency is
The radiofrequency signal of 10GHz, through the fiber-optic transfer of 20 kilometers, utilizes prior art, and in 60 minutes, phase drift exceedes
5000 degree.
As it is shown in figure 5, for using the present invention to carry out the phase drift result figure of distance radio signal transmission, frequency is same
For the radiofrequency signal of 10GHz, also pass through the fiber-optic transfer of 20 kilometers, utilize the technology of the present invention, in 60 minutes, phase
Position drift controls within 3 degree, it is achieved that the steady of radiofrequency signal transmits mutually.
Embodiments of the present invention are not limited by examples detailed above, it will be understood by those within the art that, its
The amendment made under its any spirit without departing from the present invention and principle or equivalent all should be the displacement of equivalence
Mode, within being included in protection scope of the present invention.
Claims (3)
1. a 5G distributed base station antenna rf optical transmission method, it is characterised in that comprise the steps:
The first step: phase pushing figure obtains: use the two divided-frequency signal of radio-frequency input signals in optical fiber round-trip transmission, obtain radio frequency
The phase pushing figure of fiber-optic transfer；
Second step: phase distortion pre-compensates for: radio-frequency input signals is carried out up-conversion with local two divided-frequency signal at transmitting terminal,
To 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 distortion pre-
Compensate radiofrequency signal；
3rd step: the acquisition of steady phase signals: at receiving terminal, the phase distortion through long range propagation is pre-compensated for radiofrequency signal solution
Adjust, obtain the radio frequency output signal of phase stabilization.
5G distributed base station antenna rf optical transmission method the most according to claim 1, it is characterised in that described phase place
Distortion pre-compensates for and specifically includes herein below:
At transmitting terminal, frequency is the radio-frequency input signals of F, is divided into two-way after 2 frequency dividers obtain the signal that frequency is 0.5F:
One tunnel and frequency are the radio-frequency input signals up-conversion of F, realize the addition of signal frequency in upconverter, and obtaining frequency is
The signal of 1.5F；Optical sender is sent on another road, the signal of frequency 0.5F is modulated at laser carrier feeding optical fiber and is transmitted；
At receiving terminal, utilize half-reflecting mirror reflecting part radio frequency optical modulation signal, reflex to the circulator of transmitting terminal, enter back into light
Receiver, recovers the signal that frequency is 0.5F, and 0.5F signal now just contains Transmission Fibers by various environmental change shadows
The phase drift amount of the radiofrequency signal rung and produce；In the down coversion of transmitting terminal, should be containing the 0.5F signal of phase drift amount
Subtracting each other with the signal frequency of 1.5F, having obtained frequency is F, reduces the signal of Transmission Fibers phase drift in advance；By this signal also
Send into optical sender, be modulated on laser carrier and be transmitted, recovered the radio frequency letter of frequency F at receiving terminal by photoreceiver
Number.
3. a 5G distributed base station antenna rf optical transmission system, it is characterised in that include being connected by Transmission Fibers (300)
Transmitting terminal (100) and receiving terminal (200),
Described transmitting terminal includes two-divider (101), upconverter (102), low-converter (103), optical sender (104), ring
Shape device (105) and photoreceiver (106)；First outfan of described two-divider (101) and the input of optical sender (104)
It is connected；The input of described circulator (105) is connected with the outfan of optical sender (104)；The of described two-divider (101)
Two outfans are connected with the intermediate frequency end of upconverter (102)；The local oscillator end of described low-converter (103) and upconverter (102)
Radio-frequency head be connected；The intermediate frequency end of described low-converter (103) is connected with the outfan of photoreceiver (106)；Described light-receiving
The input of machine (106) is connected with the outfan of circulator (105)；The radio-frequency head of described low-converter (103) and optical sender
(104) input is connected；
Described receiving terminal includes photoreceiver (201) and half-reflecting mirror (202)；The outfan of described half-reflecting mirror (202) and light
The input of receiver (201) is connected；The input of described half-reflecting mirror (202) passes through Transmission Fibers (300) and circulator
(105) sending and receiving end is connected；
Described two-divider (101) is all connected with radio-frequency input signals with the input of upconverter (102)；Described second light connects
The outfan output radio frequency output signal of receipts machine (201).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113381956A (en) * | 2021-08-13 | 2021-09-10 | 电子科技大学 | Safe communication method based on motion state space position point |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5196093B2 (en) * | 2006-04-20 | 2013-05-15 | 日本電気株式会社 | Optical communication apparatus and quantum cryptography key distribution system using the same |
| CN103501199A (en) * | 2013-09-30 | 2014-01-08 | 中国人民解放军理工大学 | Phase control device and phase control device for phase-stabilized transmission of radio-frequency signal |
| CN103716089A (en) * | 2013-12-26 | 2014-04-09 | 南京航空航天大学 | RF signal optical fiber phase-stabilized transmission method and system |
| CN103780312A (en) * | 2014-01-21 | 2014-05-07 | 南京航空航天大学 | Radio-frequency signal stable-phase transmission method and system |
| CN206099989U (en) * | 2016-08-31 | 2017-04-12 | 南京恩瑞特实业有限公司 | 5G distributing type base station antenna radio frequency optical transmission system |
-
2016
- 2016-08-31 CN CN201610770832.0A patent/CN106230511B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5196093B2 (en) * | 2006-04-20 | 2013-05-15 | 日本電気株式会社 | Optical communication apparatus and quantum cryptography key distribution system using the same |
| CN103501199A (en) * | 2013-09-30 | 2014-01-08 | 中国人民解放军理工大学 | Phase control device and phase control device for phase-stabilized transmission of radio-frequency signal |
| CN103716089A (en) * | 2013-12-26 | 2014-04-09 | 南京航空航天大学 | RF signal optical fiber phase-stabilized transmission method and system |
| CN103780312A (en) * | 2014-01-21 | 2014-05-07 | 南京航空航天大学 | Radio-frequency signal stable-phase transmission method and system |
| CN206099989U (en) * | 2016-08-31 | 2017-04-12 | 南京恩瑞特实业有限公司 | 5G distributing type base station antenna radio frequency optical transmission system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113381956A (en) * | 2021-08-13 | 2021-09-10 | 电子科技大学 | Safe communication method based on motion state space position point |
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