CN108521303B - The production method of high bit rate optical signal based on frequency spectrum cutting and double SSB modulation - Google Patents
The production method of high bit rate optical signal based on frequency spectrum cutting and double SSB modulation Download PDFInfo
- Publication number
- CN108521303B CN108521303B CN201810223922.7A CN201810223922A CN108521303B CN 108521303 B CN108521303 B CN 108521303B CN 201810223922 A CN201810223922 A CN 201810223922A CN 108521303 B CN108521303 B CN 108521303B
- Authority
- CN
- China
- Prior art keywords
- signal
- frequency spectrum
- bit rate
- production method
- high bit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
Abstract
The production method of high bit rate optical signal based on frequency spectrum cutting and double SSB modulation, the production method is the following steps are included: the high bit rate digital signal to transmission is cut into high-frequency signal and low frequency signal two parts by the way of spectrum imaging, and pre-processes respectively to high-frequency signal and low frequency signal；Pretreated high-frequency signal and low frequency signal are respectively enterd in coupler and coupled, to be respectively formed two single sideband singals；Two single sideband singals after coupling are passed through respectively and is input to modulator again after the electric auxiliary carrier signal of load and is modulated, combination forms a virtual single sideband singal；Virtual single sideband singal is transmitted and received by optical fiber, to carry out subsequent Digital Signal Processing.Signal spectrum is split and modulates respectively by the present invention, meets in transmitting terminal using lesser electric bandwidth, realizes the generation and transmission of high-speed optical signal, significantly reduce system cost.
Description
Technical field
The present invention relates to technical field of photo communication, more particularly to a kind of Gao Bo based on frequency spectrum cutting and double SSB modulation
The production method of special rate optical signal.
Background technique
As mobile Internet, the fast development of the business of data center network exist in short-distance and medium-distance communication scenes
The fiber-optic communications traffic demand of high-capacity and ultra high-speed.For above-mentioned short-distance and medium-distance optical communication system, how in photoelectron device
Superelevation rate signal transmission is realized in the system of part Bandwidth-Constrained, if the signal of Single wavelength list polarization 200Gb/s or more transmits, at
For a hot issue of industry.
The generation of existing ultra high speed signal is depended on DAC and directly generates or combined using RF power combiner low
Rank signal generates, such as high speed advanced modulation format PAM signal can be combined generation by NRZ signal.But in this case, it is
It realizes and generates high bit rate or higher order modulation formats optical signal, need ultrahigh speed DAC or high bandwidth RF power combiner and height
Performance linear RF electronic power amplifier, these equipment will significantly improve system cost.
It has much in short-distance and medium-distance system in the pulse amplitude modulation PAM signal of application potential, can get instantly at present
For the real-time asic chip of 60GBaudPAM-4 signal, but with current commercial devices and equipment (DAC100Gsa/s sampling
Rate, 40GHz bandwidth), the PAM signal that temporarily cannot achieve 200Gb/s or more generates and transmission.Therefore low cost, high bit are found
The optical signal of rate generates and the method for transmission, just seems meaningful.
Summary of the invention
The purpose of the present invention is overcoming shortcoming in the prior art, provide a kind of based on frequency spectrum cutting and double SSB tune
Signal spectrum, is split by this method and is modulated respectively by the production method of the high bit rate optical signal of system, and satisfaction is being sent out
End is penetrated using lesser electric bandwidth, the generation and transmission of high-speed optical signal is realized, significantly reduces system cost.
In order to solve the above technical problems, the present invention is solved by following technical proposals:
The production method of high bit rate optical signal based on frequency spectrum cutting and double SSB modulation, which includes following
Step:
S1: high-frequency signal and low frequency signal are cut by the way of spectrum imaging to the high bit rate digital signal of transmission
Two parts, and high-frequency signal and low frequency signal are pre-processed respectively；
S2: pretreated high-frequency signal and low frequency signal being respectively enterd in coupler and coupled, thus shape respectively
At two single sideband singals；
S3: it is input to modulator again after two single sideband singals after coupling are passed through with the electric auxiliary carrier signal of load respectively
It is modulated, combination forms a virtual single sideband singal；
S4: virtual single sideband singal is transmitted and is received by optical fiber, to carry out subsequent Digital Signal Processing.
Specifically, the S2 step further includes that pretreated high-frequency signal and low frequency signal are passed through tune with light source respectively
Device processed is modulated, then carries out coupling processing by photo-coupler with light auxiliary carrier signal.
Specifically, the smooth auxiliary carrier signal is generated in such a way that light source carries out frequency displacement.
Specifically, further including whole using frequency spectrum progress of the Pulse shaped filter to digital signal before the frequency spectrum cutting
Shape processing.
Specifically, the auxiliary carrier signal includes any of electric signal, optical signal and frequency displacement optical signal.
Specifically, the Shape correction includes Nyquist or the processing of super Nyquist frequency spectrum shaping.
Specifically, the Pulse shaped filter includes in raised cosine filter, IOTA and second order polynomial filter
Any one.
Specifically, the modulation system includes using in IQ optical modulator and bipolar electrode intensity MZ Mach-Zehnder
Any one is modulated.
Specifically, the pretreatment includes frequency spectrum shift.
Specifically, the mode of the frequency spectrum cutting includes uniformly cutting or uneven cutting.
The present invention have the following advantages that compared with prior art and the utility model has the advantages that
The digital signal is carried out frequency spectrum shaping processing by the present invention, will treated that digital signal carries out being cut into two
Point, to digital Signal Pretreatment, it is allowed to be more suitable for modulating to merge with signal, it can be full in transmitting terminal using lesser electric bandwidth
Foot, using lesser electric bandwidth, realizes the generation and transmission of high bit rate optical signal, significantly reduces system cost in transmitting terminal,
It is modulated to couple with subcarrier respectively with low frequency two parts of signals by pretreated high frequency with SSB, subsequent
It is received in reception mode by using the mode of auxiliary wave beat frequency, the signal that can accurately receive that treated improves
The stability when transmission of signal, and make to modulate high and low frequency signal using auxiliary wave signal and be respectively loaded on two sidebands,
Since signal spectrum forms the lesser two parts of bandwidth after cutting, the bandwidth requirement to modulator is greatly reduced, is mentioned
The high selectivity to modulator, the present invention pass through two sideband signals using double SSB after modulated and subcarrier through coupling
After conjunction, combination forms a virtual single sideband singal, realizes the generation and transmission of optical signal.
Detailed description of the invention
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is that the present invention is based on the step frames of the production method of the high bit rate optical signal of frequency spectrum cutting and double SSB modulation
Figure.
Fig. 2 is the spectrum diagram being modulated after digital signal cutting in the present invention.
Fig. 3 is auxiliary carrier signal of the present invention and the flow diagram that digital signal is loaded directly into.
Fig. 4 is the flow diagram of auxiliary carrier signal of the present invention and digital signal Indirect Loaded.
Specific embodiment
Present invention will now be described in further detail with reference to the embodiments and the accompanying drawings, but embodiments of the present invention are unlimited
In this.
Such as Fig. 1 and Fig. 2, specific implementation process of the invention is as follows: using the present invention is based on frequency spectrum cutting and double SSB modulation
High bit rate optical signal production method generate the super 100Gbaud of Single wavelength PAM4 signal, filtered first with pulse-shaping
Device carries out Nyquist or super Nyquist Spectrum compression and shaping to signal spectrum, and utilizable formed filter has more than liter
String filter, IOTA, second order polynomial filter etc., transmitting terminal by bandwidth be reduced to the half of PAM-4 Nyquist Bandwidth with
Under, for Nyquist Bandwidth be 60GHz 120GbaudPAM-4 signal, formed using super Nyquist, compressibility factor is
When 0.8, the two path signal bandwidth that transmitting terminal needs is only 120*0.5*0.5*0.8=24GHz, and signal passes through frequency spectrum shaping
Afterwards, the PAM signal that bandwidth is B is generated, then by the spectrum imaging for the PAM signal that bandwidth is B at two parts, partitioning scheme can be with
It is even partition, can also is uneven segmentation, low frequency signal part and high-frequency signal part be generated, respectively to low frequency signal part
It is pre-processed with high-frequency signal part, pretreatment includes that frequency displacement mode calculates separately and be superimposed low-and high-frequency two after the pre-treatment
Part signal formed two paths of signals, then by pretreated high-frequency signal and low frequency signal each lead into 90 degree of couplers into
Row coupling processing, signal to formed two single sideband singals, to after coupling and two single sideband singals pass through respectively
It is input in modulator and is modulated after the electric auxiliary carrier signal of load, combination forms a virtual single sideband singal.
As shown in figure 3, being carried out each leading into pretreated high-frequency signal and low frequency signal into 90 degree of couplers
Further include before coupling processing use electric signal modulation generate all the way frequency for the light subcarrier of-B/2, and to high-frequency signal with
Low frequency signal forms two single sideband singals after carrying out SSB modulation, and the two paths of signals and light subcarrier after modulation treatment is complete are believed
Enter photo-coupler number together to be handled, then will treated signal respectively into enter in 90 degree of couplers and modulator into
Row processing, to generate a virtual single sideband singal.
As shown in figure 4, the producing method of light subcarrier further include by by light source by making part of it after optical splitter
SSB modulation is carried out with high-frequency signal and low frequency signal, another part generates light subcarrier, and and high frequency by way of frequency displacement
Signal and low frequency signal enter in photo-coupler together to be handled.
Using the PAM4 signal for generating the super 100Gbaud of Single wavelength through double modulation method.
When receiving signal, signal is transmitted from modulator by optical fiber, is directly examined using photodetector
It surveys, entire PAM-4 signal spectrum is received by auxiliary carrier signal beat frequency, carrying out subsequent DSP processing.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (8)
1. the production method of the high bit rate optical signal based on frequency spectrum cutting and double SSB modulation, it is characterised in that: the production method
The following steps are included:
S1: high-frequency signal and low frequency signal two are cut by the way of spectrum imaging to the high bit rate digital signal of transmission
Point, and high-frequency signal and low frequency signal are pre-processed respectively；
S2: pretreated high-frequency signal and low frequency signal being respectively enterd in coupler and coupled, to be respectively formed two
A single sideband singal；
S3: it is input to modulator progress again after two single sideband singals after coupling are passed through with the electric auxiliary carrier signal of load respectively
Modulation, combination form a virtual single sideband singal；
S4: virtual single sideband singal is transmitted and is received by optical fiber, to carry out subsequent Digital Signal Processing；
The S2 step further includes adjusting pretreated high-frequency signal and low frequency signal by modulator with light source respectively
System, then coupling processing is carried out by photo-coupler with light auxiliary carrier signal.
2. the production method of the high bit rate optical signal according to claim 1 based on frequency spectrum cutting and double SSB modulation,
Be characterized in that: the smooth auxiliary carrier signal is generated in such a way that light source carries out frequency displacement.
3. the production method of the high bit rate optical signal according to claim 1 based on frequency spectrum cutting and double SSB modulation,
It is characterized in that: further including being carried out at shaping using frequency spectrum of the Pulse shaped filter to digital signal before the frequency spectrum cutting
Reason.
4. the production method of the high bit rate optical signal according to claim 3 based on frequency spectrum cutting and double SSB modulation,
Be characterized in that: the Shape correction includes Nyquist or the processing of super Nyquist frequency spectrum shaping.
5. the production method of the high bit rate optical signal according to claim 4 based on frequency spectrum cutting and double SSB modulation,
Be characterized in that: the Pulse shaped filter includes any of raised cosine filter, IOTA and second order polynomial filter.
6. the production method of the high bit rate optical signal according to claim 1 based on frequency spectrum cutting and double SSB modulation,
Be characterized in that: the modulation system includes using any of IQ optical modulator and bipolar electrode intensity MZ Mach-Zehnder
It is modulated.
7. the production method of the high bit rate optical signal according to claim 1 based on frequency spectrum cutting and double SSB modulation,
Be characterized in that: the pretreatment includes frequency spectrum shift.
8. the production method of the high bit rate optical signal according to claim 1 based on frequency spectrum cutting and double SSB modulation,
Be characterized in that: the mode of the frequency spectrum cutting includes uniformly cutting or uneven cutting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810223922.7A CN108521303B (en) | 2018-03-19 | 2018-03-19 | The production method of high bit rate optical signal based on frequency spectrum cutting and double SSB modulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810223922.7A CN108521303B (en) | 2018-03-19 | 2018-03-19 | The production method of high bit rate optical signal based on frequency spectrum cutting and double SSB modulation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108521303A CN108521303A (en) | 2018-09-11 |
| CN108521303B true CN108521303B (en) | 2019-11-12 |
Family
ID=63433264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810223922.7A Expired - Fee Related CN108521303B (en) | 2018-03-19 | 2018-03-19 | The production method of high bit rate optical signal based on frequency spectrum cutting and double SSB modulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108521303B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105511199A (en) * | 2016-02-03 | 2016-04-20 | 西安科技大学 | Device and method for compressing chirp entangled photon pair |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5272863B2 (en) * | 2009-04-14 | 2013-08-28 | ソニー株式会社 | Transmission apparatus, imaging apparatus, and transmission method |
| CN102036134A (en) * | 2011-01-18 | 2011-04-27 | 北京邮电大学 | OFDM (Orthogonal Frequency Division Multiplexing)-based convergence type OAN (Optical Access Network) system and method |
| CN103812562B (en) * | 2014-01-24 | 2016-05-18 | 华南师范大学 | A kind of method and apparatus that extends passive optical-fiber network transmission range |
| US20150256264A1 (en) * | 2014-03-07 | 2015-09-10 | Futurewei Technologies, Inc. | System and Method for Chromatic Dispersion Tolerant Direct Optical Detection |
| CN106487453B (en) * | 2016-09-28 | 2018-10-16 | 西安电子科技大学 | A kind of device and method of the microwave photon channelized receiver of zero intermediate frequency |
-
2018
- 2018-03-19 CN CN201810223922.7A patent/CN108521303B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105511199A (en) * | 2016-02-03 | 2016-04-20 | 西安科技大学 | Device and method for compressing chirp entangled photon pair |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108521303A (en) | 2018-09-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6661976B1 (en) | Method and system for single-sideband optical signal generation and transmission | |
| CN103051385B (en) | The optical fiber asymmetric full-duplex cut-in method that a kind of wire and wireless merges and system | |
| CN107919915B (en) | Multichannel NRZ optical signal turns the optical fiber telecommunications system and method for the more level optical signals of single channel | |
| CN102013924B (en) | Device and method for generating frequency doubling single side band optical carrier millimeter waves | |
| CN103414516B (en) | Based on two-way wire/wireless mixed light cut-in method and the system of same/heterodyne detection | |
| CN110958053B (en) | Device and method for generating quad-frequency optical millimeter wave BPSK vector signal | |
| CN105227209A (en) | The same frequency system of the interior full-duplex wireless communication systems of band and method | |
| CN102238127A (en) | Method for reducing peak to average power ratio based on coherent optical orthogonal frequency division multiplexing system | |
| JP5068240B2 (en) | Optical transmission system, transmitter and receiver | |
| CN113740833A (en) | Microwave photon radar communication integrated system and method | |
| CN106899355B (en) | Full light technology microwave receiving system and method | |
| Ishimura et al. | SSBI-free 1024QAM single-sideband direct-detection transmission using phase modulation for high-quality analog mobile fronthaul | |
| CN111130650A (en) | Method and device for generating intensity-modulated directly received optical signal and method and device for receiving intensity-modulated directly received optical signal | |
| CN101562482B (en) | Fiber wireless communication system and method for generating downlink multi-service millimeter wave | |
| CN111917475B (en) | System for simultaneously providing wired and single side band wireless services based on single modulator | |
| CN101692626A (en) | Method and device for generating and receiving optical OFDM-MSK signals | |
| CN108521303B (en) | The production method of high bit rate optical signal based on frequency spectrum cutting and double SSB modulation | |
| CN113660043A (en) | Local oscillator CVQKD method and system for channelized reception | |
| CN102255662A (en) | Radio over fibre system | |
| CN102412899B (en) | Polarization multiplexing millimeter-wave radio-over-fiber (RoF) system with high frequency spectrum utilization rate | |
| CN112350777A (en) | Double-vector millimeter wave generation system and method based on push-pull modulator | |
| CN108718213B (en) | Full duplex wired and wireless hybrid optical access system and method based on polarization multiplexing | |
| CN111953470B (en) | Secret communication system based on chaos coherent mask | |
| JP2000056279A (en) | Light transmitter for transmitting high frequency fsk signal through optical fiber | |
| CN103701530A (en) | Optical fiber wireless transmission system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191112 Termination date: 20210319 |