CN110429986A - A kind of generation of multichannel millimeter wave and wireless transmitting system based on single sideband modulation - Google Patents
A kind of generation of multichannel millimeter wave and wireless transmitting system based on single sideband modulation Download PDFInfo
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- CN110429986A CN110429986A CN201910592417.4A CN201910592417A CN110429986A CN 110429986 A CN110429986 A CN 110429986A CN 201910592417 A CN201910592417 A CN 201910592417A CN 110429986 A CN110429986 A CN 110429986A
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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
- H04B10/2507—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion
- H04B10/2513—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion
- H04B10/25133—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion including a lumped electrical or optical dispersion compensator
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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
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
- H04B10/5165—Carrier suppressed; Single sideband; Double sideband or vestigial
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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
- H04B10/50—Transmitters
- H04B10/564—Power control
Abstract
The invention belongs to Optical Generation of Millimeter Wave Signals field, specially a kind of multichannel millimeter wave based on single sideband modulation generates and wireless transmitting system.It includes transmitting terminal and receiving end；Transmitting terminal includes digital analog converter, the first, second electric amplifier, free single-mode laser, I/Q modulator, the first polarization-maintaining erbium doped optical fibre light amplifier, single mode optical fiber, the second polarization-maintaining erbium doped optical fibre light amplifier, tunable optical filter, adjustable optical attenuator, photodetector, third electric amplifier and Q-band transmission antenna；Receiving end includes Q-band receiving antenna, the 4th electric amplifier and oscillograph；The present invention generates four-way Q-band millimeter-wave signal merely with single laser and single I/Q modulator.Structure is simple, low in cost, and system stability is strong.Its optical signal, which enters single mode optical fiber transmission range, can reach 80 kilometers, and the Q-band four-way millimeter-wave signal of generation can be wirelessly transferred 0.5 meter, can apply in high speed millimeter wave wireless communication.
Description
Technical field
The invention belongs to Optical Generation of Millimeter Wave Signals fields, and in particular to a kind of multichannel millimeter wave based on single sideband modulation
Generation and wireless transmitting system.
Background technique
In order to meet the stable growth requirement of the following 5G wireless communication high speed, such as 1 ~ 10Gb/s needs multiple using wavelength-division
With technology, multichannel millimeter wave is generated on millimeter wave frequency band, will become in terms of lifting system capacity it is very necessary, it can be achieved that
Large capacity millimeter wave wireless communication transmissions.It is generated based on multichannel millimeter wave and light carrier wireless transmitting system has obtained extensively
General research, however, being mostly using multiple lasers as transmitting light in traditional multichannel millimeter wave generation technology scheme
Source is increasing system structure complexity, and the unstability of system, therefore and not applicable future are also improved while improving cost
The development of high-speed radio system.It is therefore desirable to study how based on a simple framework to realize multicarrier millimeter-wave signal
It generates and is wirelessly transferred.[J. Zhang, J. Yu, N. Chi, Z. Dong, X. Li, G. K. Chang,
“Multichannel 120-Gb/s Data Transmission Over 2×2 MIMO Fiber-Wireless Link
at W-Band,” IEEE Photon. Technol. Lett., vol. 25, no. 8, pp.780-783,Apr.
2013.].Although the transmitting light source that a laser source generates framework as multicarrier millimeter wave is used only in these schemes,
Photodetector front end introduces another laser source again, and using optical heterodyne principle, beat frequency generates multicarrier millimeter wave, not only makes
Increased costs are obtained, the phase noise problems generated by different laser sources can be also introduced.At the same time, the program utilizes double-side band tune
Principle processed generates multi-carrier signal, makes it be easy to be influenced by fibre-optical dispersion in optical fiber transmission process, causes power loss.If
Using single sideband modulation principle, then fibre-optical dispersion can be effectively solved the problems, such as.Document [X. Li, Y. Xu, and J. Yu,
“Single-sideband W-band photonic vector millimeter-wave signal generation by
one single I/Q modulator,” Optics Letters, vol. 41, no. 18, pp. 4162-4165,
Sep. 2016.] propose based on single sideband modulation principle, use I/Q modulator to generate the upper side band for carrying modulating vector information
Signal generates the radiofrequency signal for not carrying modulation intelligence in lower sideband, the two can beat frequency after photodetector at the same time
Vector millimeter-wave signal is generated, carries Vector Message due to only having upper side band signal, upper side band and lower sideband signal are not
It is influenced by fibre-optical dispersion walk-off effect.But since the program only produces single channel millimeter-wave signal, limit no linear system
System transmission capacity is substantially improved.
Summary of the invention
For above situation, the multichannel millimeter wave that the object of the present invention is to provide a kind of based on single sideband modulation generate and
Wireless transmitting system, to realize the generation of the four-way optical millimeter wave signal of Q-band, light-carried wireless link realizes optical fiber transmission 80
Kilometer and wireless transmission 0.5m.A kind of multichannel millimeter wave generation system based on single sideband modulation provided by the invention can avoid
Emit light source using multiple lasers as multichannel, achieves that multichannel milli using only single laser and I/Q modulator
The generation of metric wave, structure is simple, low in cost, and system stability is strong.The present invention is based on single sideband modulation principles, by I/Q tune
Optical signal after system is not influenced by fibre-optical dispersion walk-off effect, and the optical signal after optical fiber transmits does not need to carry out dispersion
Compensation, therefore its optical signal enters single mode optical fiber transmission range can reach 80 kilometers, the Q-band four-way millimeter-wave signal of generation
0.5 meter can be wirelessly transferred.The advantage that present system has transmitting end structure simple, at low cost, can apply in high speed millimeter
In wave wireless communication.
The present invention provides a kind of multichannel millimeter wave based on single sideband modulation and generates and wireless transmitting system, including sends
End and receiving end；
(1) transmitting terminal includes digital analog converter, the first, second electric amplifier, free single-mode laser, I/Q modulator, the first guarantor
Inclined erbium optical amplifier fiber, single mode optical fiber, the second polarization-maintaining erbium doped optical fibre light amplifier, tunable optical filter, adjustable optical attenuator,
Photodetector, third electric amplifier and Q-band transmission antenna；Wherein:
Digital analog converter sends data and consists of two parts, and a part is the multichannel upper side band tune for carrying modulating vector information
Signal f2, f3, f4, f5 processed, a part are the radio frequency lower sideband signal-f1 for not carrying modulation intelligence, and the two, which is merged, becomes hair
Send base band single sideband singal；
First, second electric amplifier, the first electric amplifier are used to amplify the power of the port base band single sideband modulated signal I, and second
Electric amplifier is used to amplify the power of the port Q；
Free single-mode laser, for providing continuous wave light wave, frequency fc；
I/Q modulator, for a high-power single sideband singal upper side band multi channel signals to be modulated to the continuous glistening light of waves all the way
The right fc+f2, fc+f3, fc+f4, fc+f5 of fc on wave, lower sideband signal are modulated to the left side fc- f1 of fc；
First polarization-maintaining erbium doped optical fibre light amplifier, for amplifying by the optical signal after I/Q modulators modulate；
Single mode optical fiber is used for transmission by the amplified optical signal of erbium-based amplifier；
Second polarization-maintaining erbium doped optical fibre light amplifier, for amplifying the optical signal after single mode optical fiber transmits；
Tunable optical filter, for reducing the spontaneous emission noise after erbium-doped fiber amplifier；
Adjustable optical attenuator, for adjusting the optical signal power for entering photodetector；
Photodetector, for the upper side band and lower sideband signal beat frequency that are located at the both sides light wave fc to be transformed into the four-way of Q-band
Road millimeter-wave signal f1+f2, f1+f3, f1+f4, f1+f5；
Third electric amplifier, for amplifying the power for generating four-way millimeter-wave signal；
Q-band transmission antenna, for emitting Q-band four-way millimeter-wave signal；
(2) receiving end includes Q-band receiving antenna, the 4th electric amplifier and oscillograph；Wherein:
Q-band receiving antenna, for receiving Q-band four-way millimeter-wave signal；
4th electric amplifier, for amplifying the four-way millimeter-wave signal after receiving；
Oscillograph, to recover original transmission data from reception signal.
Preferably, the length of single mode optical fiber is 80 kilometers long.
Preferably, the wave band of third electric amplifier, the 4th electric amplifier is between 0 ~ 50Hz.
Q-band multichannel millimeter wave provided by the invention based on single sideband modulation generates and wireless transmitting system, is sending out
In sending end, it can be generated respectively using offline software and carry the multichannel upper side band signal of modulation intelligence and do not carry modulation intelligence
Lower sideband signal, single sideband singal real part after the two is merged and imaginary part respectively drive I/Q modulator the port I and
The continuous light of the port Q, single laser output passes through the modulated optical signal of I/Q, can produce vector four into photodetector
Channel millimeter-wave signal.Emitted using transmission antenna is entered after electric amplifier amplification；It is received by receiving antenna
Four-way wireless millimeter wave signal finally enters oscillograph and is received, therefrom to restore after amplifying via an electric amplifier
Original transmission data out.
Compared to the prior art, the beneficial effects of the present invention are:
The present invention is based on single lasers and I/Q modulator, and the vector milli of four-way Q-band is generated using single sideband modulation principle
Metric wave signal, and realize that optical signal carries out single mode optical fiber and transmits 80 kilometers, Q-band four-way millimeter-wave signal wireless transmission 0.5
Rice has transmitting end structure simple, and low-cost advantage can be applied in high speed millimeter wave wireless communication.
Detailed description of the invention
Fig. 1 is the generation of Q-band four-way millimeter wave and the wireless transmitting system frame of single sideband modulation proposed by the present invention
Structure.
Figure label: 1 is digital analog converter, and 2 be I/Q modulator, and 3 be the first electric amplifier, and 4 be the second electric amplifier,
5 be external cavity modulation laser, and 6 be the first EDFA Erbium-Doped Fiber Amplifier, and 7 be 80 kilometers of single mode optical fibers, and 8 amplify for the second erbium-doped fiber
Device, 9 be tunable optic filter, and 10 be variable optical attenuator, and 11 be photodetector, and 12 be third electric amplifier, and 13 be Q wave
Section transmitting antenna, 14 be Q-band receiving antenna, and 15 be the 4th electric amplifier, and 16 be oscillograph.
Specific embodiment
With reference to the accompanying drawing, the present invention is illustrated.
Fig. 1 is the generation of Q-band four-way millimeter wave and the wireless transmitting system framework of single sideband modulation, it includes:
In transmitting terminal, it can be generated respectively using offline software and carry the multichannel upper side band signal of modulation intelligence and do not carry
The lower sideband signal of modulation intelligence is converted into analog signal by digital analog converter 1 after merging the two, analog signal
Real part passes through the first electric amplifier 3 with imaginary part respectively and the second electric amplifier 4 amplifies, to drive the end I of I/Q modulator 2
Mouth and the port Q, the frequency from a free single-mode laser 5 are that the continuous wave light wave of fc is modulated by I/Q modulator 2.
Modulated light wave fc carries out optical transport after the amplification of the first erbium-doped fiber amplifier 6, into 80 kilometers of single mode optical fibers 7, then
It is amplified via the second EDFA Erbium-Doped Fiber Amplifier 8, sequentially entering tunable optic filter 9 reduces spontaneous emission noise, after filtering
Optical signal enter variable optical attenuator 10 and adjust the optical power for entering photodetector 11, in photodetector 11 by into one
Step beat frequency is transformed into Q-band four-way millimeter-wave signal.Four-way road vector millimeter-wave signal is via the of a 0-50GHz frequency range
Three electric amplifiers 12 are amplified into Q-band transmitting antenna 13 and are sent, by receiving the four-way road vector after antenna 14 receives
After the 4th electric amplifier 15 that millimeter-wave signal enters back into a 0-50GHz frequency range amplifies, finally by an oscillograph 16
Storage receives signal, therefrom to recover original transmission data.
In specific embodiment, generated using above-mentioned multichannel millimeter wave based on single sideband modulation and wireless transmitting system,
The Q-band four-way millimeter-wave signal that frequency is 34-GHz, 39-GHz, 44-GHz and 49-GHz is generated simultaneously.
In specific embodiment, it is based on single laser and I/Q modulator, generates four-way Q using single sideband modulation principle
The vector millimeter-wave signal of wave band, and realize that optical signal carries out single mode optical fiber and transmits 80 kilometers, Q-band four-way millimeter-wave signal
0.5 meter of wireless transmission.
In short, Q-band four may be implemented in the multichannel millimeter wave generation technology of the present invention based on single sideband modulation
The generation of channel millimeter-wave signal and wireless transmission 0.5m are suitable in following high speed millimeter wave wireless communication.
Claims (3)
1. a kind of multichannel millimeter wave based on single sideband modulation generates and wireless transmitting system, which is characterized in that including sending
End and receiving end；
(1) transmitting terminal includes digital analog converter, the first, second electric amplifier, free single-mode laser, I/Q modulator, the first guarantor
Inclined erbium optical amplifier fiber, single mode optical fiber, the second polarization-maintaining erbium doped optical fibre light amplifier, tunable optical filter, adjustable optical attenuator,
Photodetector, third electric amplifier and Q-band transmission antenna；Wherein:
Digital analog converter sends data and consists of two parts, and a part is the multichannel upper side band tune for carrying modulating vector information
Signal f2, f3, f4, f5 processed, a part are the radio frequency lower sideband signal-f1 for not carrying modulation intelligence, and the two, which is merged, becomes hair
Send base band single sideband singal；
First, second electric amplifier, the first electric amplifier are used to amplify the power of the port base band single sideband modulated signal I, and second
Electric amplifier is used to amplify the power of the port Q；
Free single-mode laser, for providing continuous wave light wave, frequency fc；
I/Q modulator, for a high-power single sideband singal upper side band multi channel signals to be modulated to the continuous glistening light of waves all the way
The right fc+f2, fc+f3, fc+f4, fc+f5 of fc on wave, lower sideband signal are modulated to the left side fc- f1 of fc；
First polarization-maintaining erbium doped optical fibre light amplifier, for amplifying by the optical signal after I/Q modulators modulate；
Single mode optical fiber is used for transmission by the amplified optical signal of erbium-based amplifier；
Second polarization-maintaining erbium doped optical fibre light amplifier, for amplifying the optical signal after single mode optical fiber transmits；
Tunable optical filter, for reducing the spontaneous emission noise after erbium-doped fiber amplifier；
Adjustable optical attenuator, for adjusting the optical signal power for entering photodetector；
Photodetector, for the upper side band and lower sideband signal beat frequency that are located at the both sides light wave fc to be transformed into the four-way of Q-band
Road millimeter-wave signal f1+f2, f1+f3, f1+f4, f1+f5；
Third electric amplifier, for amplifying the power for generating four-way millimeter-wave signal；
Q-band transmission antenna, for emitting Q-band four-way millimeter-wave signal；
(2) receiving end includes Q-band receiving antenna, the 4th electric amplifier and oscillograph；Wherein:
Q-band receiving antenna, for receiving Q-band four-way millimeter-wave signal；
4th electric amplifier, for amplifying the four-way millimeter-wave signal after receiving；
Oscillograph, to recover original transmission data from reception signal.
2. the multichannel millimeter wave according to claim 1 based on single sideband modulation generates and wireless transmitting system, special
Sign is that the length of single mode optical fiber is 80 kilometers long.
3. the multichannel millimeter wave according to claim 1 based on single sideband modulation generates and wireless transmitting system, special
Sign is, third electric amplifier, the 4th electric amplifier wave band between 0 ~ 50Hz.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111769878A (en) * | 2020-06-16 | 2020-10-13 | 光创新电(苏州)信息科技有限公司 | System for providing wired and wireless services by single modulator and using method thereof |
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Cited By (1)
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| CN111769878A (en) * | 2020-06-16 | 2020-10-13 | 光创新电(苏州)信息科技有限公司 | System for providing wired and wireless services by single modulator and using method thereof |
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