CN110311732A - A kind of WDM-PON system and communication means based on PS-PAM4 - Google Patents
A kind of WDM-PON system and communication means based on PS-PAM4 Download PDFInfo
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- CN110311732A CN110311732A CN201910496965.7A CN201910496965A CN110311732A CN 110311732 A CN110311732 A CN 110311732A CN 201910496965 A CN201910496965 A CN 201910496965A CN 110311732 A CN110311732 A CN 110311732A
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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
- H04B10/2543—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to fibre non-linearities, e.g. Kerr effect
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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
- H04B10/2589—Bidirectional transmission
- H04B10/25891—Transmission components
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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
- H04B10/524—Pulse modulation
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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
- H04B10/548—Phase or frequency modulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0278—WDM optical network architectures
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- Computer Networks & Wireless Communication (AREA)
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Abstract
The WDM-PON system based on PS-PAM4 that the present invention relates to a kind of, and the communication means based on the WDM-PON system, according to Maxwell-Boltzmann distribution, change the distribution probability of each amplitude in PAM4 signal, the nonlinear effect of signal is reduced, realizes low error rate and the transmission of high receiving sensitivity.The present invention can obtain reshaping gain and improve the nonlinear effect of WDM-PON.
Description
Technical field
The present invention relates to the digital modulation techniques of fiber optic communication field, more specifically to a kind of based on PS-PAM4's
WDM-PON system and a kind of communication means based on the WDM-PON system.
Background technique
Growth with user to transmission demand, fiber optic communication become as a kind of long range, the transmission mode of large capacity
The main direction of studying of communication.
It is low to calculate complexity since implementation is simple for PAM4 signal, therefore in short distance, the fibre-optic transmission system (FOTS) of high-speed
In have great advantages.The connected applications of PAM4 and incoherent technique can reduce system cost and energy consumption.However,
In wavelength-division multiplex (WDM) passive optical network (PON) system of direct detection, signal is influenced by fiber nonlinear effect, is caused
System reception sensitivity declines to a great extent.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of acquisition reshaping gain and improve WDM-PON
Nonlinear effect the WDM-PON system based on PS-PAM4, and the communication means based on the WDM-PON system.
Technical scheme is as follows:
A kind of Wave division multiplexing passive optical network WDM- based on probability shaping quadravalence pulse amplitude modulation format PS-PAM4
PON system, including sequentially connected optical line terminal, optical distribution network, several optical network units；
Optical line terminal includes probability shaping generation module, PS-PAM4 signal modulation module；Probability shaping generation module root
Pseudo-random binary bit stream PRBS gray mappings are obtained into PS-PAM4 number letter all the way according to Maxwell-Boltzmann distribution
Number, the digital signal of PS-PAM4 all the way through D/A switch, is obtained PS-PAM4 simulation by PS-PAM4 signal modulation module
Signal；PS-PAM4 analog signal is modulated on N number of photon carrier wave again, obtains the road N PS-PAM4 optical signal；Pass through wavelength-division multiplex
The road N PS-PAM4 optical signal is multiplexed with PS-PAM4 optical signal all the way by device；
Optical distribution network is transmission link module, and the optical signal of PS-PAM4 all the way that optical line terminal is sent is demultiplexed
With obtaining the road N PS-PAM4 optical signal, and be transmitted to optical network unit；
Optical network unit includes that PS-PAM4 signal receives demodulation module, and the road the N PS-PAM4 optical signal after demultiplexing is passed through
Optical electrical transformation, obtains the road N PS-PAM4 analog signal, then PS-PAM4 analog signal is obtained PS-PAM4 number through analog/digital conversion
Word signal, and restore to obtain binary bits information.
Preferably, according to Maxwell-Boltzmann distributionIt is general that PRBS is generated into amplitude
The PS-PAM4 symbol L that rate distribution does not wait, wherein xi,xk=[x1,x2...,x4], v is probability factor, v ∈ R.
Preferably, the method that PS-PAM4 analog signal is modulated to PS-PAM4 optical signal are as follows: by N number of photon carrier wave point
At Qi Lu and even road, odd road light carrier and even road light carrier are coupled as with photo-coupler respectively；Again by PS-PAM4 analog signal point
It is not modulated on odd road light carrier and even road light carrier, obtains odd road PS-PAM4 optical signal and even road PS-PAM4 optical signal；It is logical
It crosses wavelength division multiplexer and odd road PS-PAM4 optical signal and even road PS-PAM4 optical signal is multiplexed with PS-PAM4 optical signal all the way.
Preferably, PS-PAM4 analog signal is modulated to odd Lu Guang with two Mach-Zehnder modulators MZM respectively
Carrier wave and even road light carrier, obtain odd road PS-PAM4 optical signal and even road PS-PAM4 optical signal.
The road the N PS-PAM4 optical signal after demultiplexing is examined through photoelectricity preferably, PS-PAM4 signal receives demodulation module
It surveys device and carries out optical electrical transformation, obtain the road N PS-PAM4 analog signal
Preferably, optical network unit further includes balance module, PS-PAM4 signal receives the PS- of demodulation module output
After the equalised module of PAM4 digital signal carries out equilibrium calculation, corresponding binary system ratio is obtained according to gray mappings rule demapping
Special information.
Preferably, equilibrium calculation specifically: according to constant modulus algorithm CMA and direct judgement-least-mean-square error algorithm DD-
LMS algorithm does equilibrium calculation to PS-PAM4 signal.
Preferably, transmission link module includes optical fiber, demultiplexer, the PS-PAM4 all the way that optical line terminal is sent
Optical signal is sent into optical fiber, and demultiplexer will be demultiplexed by the optical signal of PS-PAM4 all the way of transmission as the road N PS-PAM4 light letter
Number.
It is a kind of based on the Wavelength division multiplexing-passive light based on probability shaping quadravalence pulse amplitude modulation format PS-PAM4
The communication means of network WDM-PON system, steps are as follows:
1) according to Maxwell-Boltzmann distribution, PRBS is generated into the PS-PAM4 that an amplitude probability distribution does not wait and is accorded with
Number L, then carries out gray mappings, obtains PS-PAM4 digital signal all the way；
2) digital signal of PS-PAM4 all the way is obtained into PS-PAM4 analog signal through D/A switch；Again by PS-
PAM4 analog signal is modulated on N number of photon carrier wave, obtains the road N PS-PAM4 optical signal, then the road N PS-PAM4 optical signal is multiplexed
For PS-PAM4 optical signal all the way；
3) optical signal of PS-PAM4 all the way that step 2) obtains is demultiplexed, obtains the road N PS-PAM4 optical signal, it is corresponding
It is transmitted to N number of optical network unit；
4) optical network unit converts the road the N PS-PAM4 optical signal after demultiplexing through optical electrical, obtains the road N PS-PAM4 mould
Quasi- signal, then PS-PAM4 analog signal is obtained into PS-PAM4 digital signal through analog/digital conversion；
5) according to gray mappings by PS-PAM4 digital signal demapping, recovery obtains binary bits information.
Preferably, before carrying out demapping, being carried out to the PS-PAM4 digital signal that step 4) obtains equal in step 5)
Weighing apparatus calculates.
Beneficial effects of the present invention are as follows:
WDM-PON system of the present invention based on PS-PAM4, and the communication based on the WDM-PON system
Method changes the distribution probability of each amplitude in PAM4 signal, reduces the non-of signal according to Maxwell-Boltzmann distribution
Linear effect realizes low error rate and the transmission of high receiving sensitivity.The present invention can obtain reshaping gain and improve WDM-PON's
Nonlinear effect.
Detailed description of the invention
Fig. 1 is the functional block diagram of the WDM-PON system based on PS-PAM4；
Fig. 2 is the flow diagram of probability shaping generation module；
Fig. 3 is PS-PAM4 signal amplitude probability distribution graph；
Fig. 4 is the flow diagram of PS-PAM4 signal modulation module；
Fig. 5 is the flow diagram of transmission link module；
Fig. 6 is the flow diagram that PS-PAM4 signal receives demodulation module；
Fig. 7 is the flow diagram of balance module；
Fig. 8 is the channel capacity figure of the WDM-PON based on PS-PAM4；
Fig. 9 is the bit error rate of the WDM-PON system based on PS-PAM4 with incident optical power change curve.
Specific embodiment
The present invention is further described in detail with reference to the accompanying drawings and embodiments.
The present invention is in order to solve wavelength-division multiplex (WDM) passive optical network (PON) of the existing technology in direct detection
In system, signal is influenced by fiber nonlinear effect, and the deficiency for causing system reception sensitivity to decline to a great extent provides a kind of base
In the Wave division multiplexing passive optical network WDM-PON system of probability shaping quadravalence pulse amplitude modulation format PS-PAM4, such as Fig. 1 institute
Show, including sequentially connected optical line terminal, optical distribution network, several optical network units.
Optical line terminal includes probability shaping generation module, PS-PAM4 signal modulation module.As shown in Fig. 2, probability shaping
Pseudo-random binary bit stream PRBS gray mappings are obtained PS- all the way according to Maxwell-Boltzmann distribution by generation module
PAM4 digital signal, PS-PAM4 signal modulation module through D/A switch, obtain the digital signal of PS-PAM4 all the way
PS-PAM4 analog signal；PS-PAM4 analog signal is modulated on N number of photon carrier wave again, obtains the road N PS-PAM4 optical signal；
The road N PS-PAM4 optical signal is multiplexed with PS-PAM4 optical signal all the way by wavelength division multiplexer.
In the present embodiment, according to Maxwell-Boltzmann distributionPRBS is generated into amplitude
The PS-PAM4 symbol L that probability distribution does not wait, wherein xi,xk=[x1,x2...,x4], v is probability factor, v ∈ R.PS-PAM4 letter
Number amplitude distribution, as shown in Figure 3.It is PS-PAM4 digital signal by PRBS further according to gray mappings rule.
As shown in figure 4, the method that PS-PAM4 analog signal is modulated to PS-PAM4 optical signal are as follows: by N number of photon carrier wave
It is divided into Qi Lu and even road, is coupled as odd road light carrier and even road light carrier with photo-coupler respectively；Again by PS-PAM4 analog signal
It is modulated on odd road light carrier and even road light carrier respectively, obtains odd road PS-PAM4 optical signal and even road PS-PAM4 optical signal；
Odd road PS-PAM4 optical signal and even road PS-PAM4 optical signal are multiplexed with PS-PAM4 optical signal all the way by wavelength division multiplexer.
In the present embodiment, by PS-PAM4 analog signal with two Mach-Zehnder modulators MZM be modulated to respectively odd road light carrier and
Even road light carrier obtains odd road PS-PAM4 optical signal and even road PS-PAM4 optical signal.
Optical distribution network is transmission link module, and the optical signal of PS-PAM4 all the way that optical line terminal is sent is demultiplexed
With obtaining the road N PS-PAM4 optical signal, and be transmitted to optical network unit.In the present embodiment, as shown in figure 5, transmission link module
Including optical fiber, demultiplexer, it is A km standard single mode that the optical signal of PS-PAM4 all the way that optical line terminal is sent, which is sent into length,
Optical fiber, demultiplexer will be demultiplexed by the optical signal of PS-PAM4 all the way of transmission as the road N PS-PAM4 optical signal.
Optical network unit includes that PS-PAM4 signal receives demodulation module, and the road the N PS-PAM4 optical signal after demultiplexing is passed through
Optical electrical transformation, obtains the road N PS-PAM4 analog signal, then PS-PAM4 analog signal is obtained PS-PAM4 number through analog/digital conversion
Word signal, and restore to obtain binary bits information.As shown in fig. 6, optical network unit further includes balance module, PS-PAM4 letter
Number receive demodulation module output the equalised module of PS-PAM4 digital signal carry out equilibrium calculation after, according to gray mappings rule
Demapping obtains corresponding binary bits information.
In the present embodiment, PS-PAM4 signal receives demodulation module for the road the N PS-PAM4 optical signal after demultiplexing through photoelectricity
Detector (such as photodiode) carries out optical electrical transformation, obtains the road N PS-PAM4 analog signal.
As shown in fig. 7, equilibrium calculation specifically: according to constant modulus algorithm CMA and direct judgement-least-mean-square error algorithm
DD-LMS algorithm does equilibrium calculation to PS-PAM4 signal.Wherein, PS-PAM4 channel capacity figure, as shown in Figure 8；PS-PAM4 system
The bit error rate of uniting is with incident optical power change curve, as shown in Figure 9.
Based on the Wave division multiplexing passive optical network based on probability shaping quadravalence pulse amplitude modulation format PS-PAM4
WDM-PON system, the present invention also provides a kind of corresponding communication means, and steps are as follows:
1) according to Maxwell-Boltzmann distribution, PRBS is generated into the PS-PAM4 that an amplitude probability distribution does not wait and is accorded with
Number L, then carries out gray mappings, obtains PS-PAM4 digital signal all the way；
2) digital signal of PS-PAM4 all the way is obtained into PS-PAM4 analog signal through D/A switch；Again by PS-
PAM4 analog signal is modulated on N number of photon carrier wave, obtains the road N PS-PAM4 optical signal, then the road N PS-PAM4 optical signal is multiplexed
For PS-PAM4 optical signal all the way；
3) optical signal of PS-PAM4 all the way that step 2) obtains is demultiplexed, obtains the road N PS-PAM4 optical signal, it is corresponding
It is transmitted to N number of optical network unit；
4) optical network unit converts the road the N PS-PAM4 optical signal after demultiplexing through optical electrical, obtains the road N PS-PAM4 mould
Quasi- signal, then PS-PAM4 analog signal is obtained into PS-PAM4 digital signal through analog/digital conversion；
5) the PS-PAM4 digital signal obtained to step 4) carries out equilibrium calculation, then according to gray mappings by PS-PAM4
Digital signal demapping, recovery obtain binary bits information.
Above-described embodiment is intended merely to illustrate the present invention, and is not used as limitation of the invention.As long as according to this hair
Bright technical spirit is changed above-described embodiment, modification etc. will all be fallen in the scope of the claims of the invention.
Claims (10)
1. a kind of Wave division multiplexing passive optical network WDM-PON based on probability shaping quadravalence pulse amplitude modulation format PS-PAM4
System, which is characterized in that including sequentially connected optical line terminal, optical distribution network, several optical network units；
Optical line terminal includes probability shaping generation module, PS-PAM4 signal modulation module；Probability shaping generation module is according to wheat
Pseudo-random binary bit stream PRBS gray mappings are obtained PS-PAM4 digital signal all the way by Ke Siwei-ANALOGY OF BOLTZMANN DISTRIBUTION,
The digital signal of PS-PAM4 all the way through D/A switch, is obtained PS-PAM4 simulation letter by PS-PAM4 signal modulation module
Number；PS-PAM4 analog signal is modulated on N number of photon carrier wave again, obtains the road N PS-PAM4 optical signal；Pass through wavelength division multiplexer
The road N PS-PAM4 optical signal is multiplexed with PS-PAM4 optical signal all the way；
Optical distribution network is transmission link module, and the optical signal of PS-PAM4 all the way that optical line terminal is sent is demultiplexed, is obtained
To the road N PS-PAM4 optical signal, and it is transmitted to optical network unit；
Optical network unit includes that PS-PAM4 signal receives demodulation module, by the road the N PS-PAM4 optical signal after demultiplexing through optical electrical
Transformation obtains the road N PS-PAM4 analog signal, then PS-PAM4 analog signal is obtained PS-PAM4 number letter through analog/digital conversion
Number, and restore to obtain binary bits information.
2. the wavelength-division multiplex according to claim 1 based on probability shaping quadravalence pulse amplitude modulation format PS-PAM4 without
Source optical-fiber network WDM-PON system, which is characterized in that according to Maxwell-Boltzmann distributionIt will
PRBS generates the PS-PAM4 symbol L that amplitude probability distribution does not wait, wherein xi,xk=[x1,x2...,x4], v is probability factor, v
∈R。
3. the wavelength-division multiplex according to claim 1 based on probability shaping quadravalence pulse amplitude modulation format PS-PAM4 without
Source optical-fiber network WDM-PON system, which is characterized in that the method that PS-PAM4 analog signal is modulated to PS-PAM4 optical signal are as follows:
N number of photon carrier wave is divided into Qi Lu and even road, is coupled as odd road light carrier and even road light carrier with photo-coupler respectively；Again will
PS-PAM4 analog signal is modulated to respectively on odd road light carrier and even road light carrier, obtains odd road PS-PAM4 optical signal and even road
PS-PAM4 optical signal；Odd road PS-PAM4 optical signal and even road PS-PAM4 optical signal are multiplexed with all the way by wavelength division multiplexer
PS-PAM4 optical signal.
4. the wavelength-division multiplex according to claim 3 based on probability shaping quadravalence pulse amplitude modulation format PS-PAM4 without
Source optical-fiber network WDM-PON system, which is characterized in that by PS-PAM4 analog signal with two Mach-Zehnder modulators MZM points
It is not modulated to odd road light carrier and even road light carrier, obtains odd road PS-PAM4 optical signal and even road PS-PAM4 optical signal.
5. the wavelength-division multiplex according to claim 1 based on probability shaping quadravalence pulse amplitude modulation format PS-PAM4 without
Source optical-fiber network WDM-PON system, which is characterized in that PS-PAM4 signal receives demodulation module for the road the N PS-PAM4 after demultiplexing
Optical signal carries out optical electrical transformation through photoelectric detector, obtains the road N PS-PAM4 analog signal.
6. the wavelength-division multiplex according to claim 1 based on probability shaping quadravalence pulse amplitude modulation format PS-PAM4 without
Source optical-fiber network WDM-PON system, which is characterized in that optical network unit further includes balance module, and PS-PAM4 signal receives solution mode transfer
After the equalised module of PS-PAM4 digital signal of block output carries out equilibrium calculation, phase is obtained according to gray mappings rule demapping
The binary bits information answered.
7. the wavelength-division multiplex according to claim 6 based on probability shaping quadravalence pulse amplitude modulation format PS-PAM4 without
Source optical-fiber network WDM-PON system, which is characterized in that equilibrium calculation specifically: according to constant modulus algorithm CMA and direct judgement-minimum
Mean square error algorithm DD-LMS algorithm does equilibrium calculation to PS-PAM4 signal.
8. the wavelength-division multiplex according to claim 1 based on probability shaping quadravalence pulse amplitude modulation format PS-PAM4 without
Source optical-fiber network WDM-PON system, which is characterized in that transmission link module includes optical fiber, demultiplexer, and optical line terminal is sent
The optical signal of PS-PAM4 all the way be sent into optical fiber, demultiplexer by by transmission the optical signal of PS-PAM4 all the way demultiplex into as N
Road PS-PAM4 optical signal.
9. one kind is described in any item based on probability shaping quadravalence pulse amplitude modulation format PS-PAM4 based on claim 1 to 8
Wave division multiplexing passive optical network WDM-PON system communication means, which is characterized in that steps are as follows:
1) according to Maxwell-Boltzmann distribution, PRBS is generated into the PS-PAM4 symbol L that an amplitude probability distribution does not wait,
Then gray mappings are carried out, PS-PAM4 digital signal all the way is obtained；
2) digital signal of PS-PAM4 all the way is obtained into PS-PAM4 analog signal through D/A switch；Again by PS-PAM4
Analog signal is modulated on N number of photon carrier wave, obtains the road N PS-PAM4 optical signal, then the road N PS-PAM4 optical signal is multiplexed with one
Road PS-PAM4 optical signal；
3) optical signal of PS-PAM4 all the way that step 2) obtains is demultiplexed, obtains the road N PS-PAM4 optical signal, corresponding transmission
To N number of optical network unit；
4) optical network unit converts the road the N PS-PAM4 optical signal after demultiplexing through optical electrical, obtains the road N PS-PAM4 simulation letter
Number, then PS-PAM4 analog signal is obtained into PS-PAM4 digital signal through analog/digital conversion；
5) according to gray mappings by PS-PAM4 digital signal demapping, recovery obtains binary bits information.
10. communication means according to claim 9, which is characterized in that in step 5), before carrying out demapping, to step
4) the PS-PAM4 digital signal obtained carries out equilibrium calculation.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111049586A (en) * | 2019-12-25 | 2020-04-21 | 南京信息工程大学 | Pulse amplitude position modulation system based on amplitude reduction type probability forming |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108631879A (en) * | 2018-05-14 | 2018-10-09 | 华侨大学 | A kind of light orthogonal frequency division multiplexing communication method and system based on probability shaping mapping |
| CN109347782A (en) * | 2018-09-26 | 2019-02-15 | 南京信息工程大学 | Probability manufacturing process based on asymmetric polygon modulation and bit-level ontology label |
-
2019
- 2019-06-10 CN CN201910496965.7A patent/CN110311732A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108631879A (en) * | 2018-05-14 | 2018-10-09 | 华侨大学 | A kind of light orthogonal frequency division multiplexing communication method and system based on probability shaping mapping |
| CN109347782A (en) * | 2018-09-26 | 2019-02-15 | 南京信息工程大学 | Probability manufacturing process based on asymmetric polygon modulation and bit-level ontology label |
Non-Patent Citations (1)
| Title |
|---|
| XIAO QINGHUA: "Experimental demonstration of WDM-PON based on probabilistic shaped PAM4 modulation format", 《PROCEEDINGS OF SPIE》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111049586A (en) * | 2019-12-25 | 2020-04-21 | 南京信息工程大学 | Pulse amplitude position modulation system based on amplitude reduction type probability forming |
| CN111049586B (en) * | 2019-12-25 | 2020-11-03 | 南京信息工程大学 | Pulse amplitude position modulation system based on amplitude reduction type probability forming |
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Application publication date: 20191008 |