CN106059703B - Local side R-T unit and its decoding method based on OCDMA two dimension electric light encoding and decoding - Google Patents
Local side R-T unit and its decoding method based on OCDMA two dimension electric light encoding and decoding Download PDFInfo
- Publication number
- CN106059703B CN106059703B CN201610583520.9A CN201610583520A CN106059703B CN 106059703 B CN106059703 B CN 106059703B CN 201610583520 A CN201610583520 A CN 201610583520A CN 106059703 B CN106059703 B CN 106059703B
- Authority
- CN
- China
- Prior art keywords
- decoding
- delay
- time domain
- electric
- optical frequency
- 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.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/005—Optical Code Multiplex
-
- 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
- H04B10/40—Transceivers
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Optical Communication System (AREA)
Abstract
The present invention discloses a kind of local side R-T unit and its decoding method based on OCDMA two dimension electric light encoding and decoding, which is mainly made of electric time domain delay coding/decoding module, optical frequency domain coding/decoding module, photo-coupler, system management module and power management module.Electric time domain delay coding module connection optical frequency domain coding/decoding module, the delay that the n user data electric signal that core net issues is carried out at the same time to time domain according to unique light address code that each user distributes encodes, signal after time domain coding is coupled, and the electric signal after then n user is coupled is sent into optical frequency domain coding/decoding module and is carried out at the same time Frequency Domain Coding according to light address code；Optical frequency domain coding/decoding module is converted into optical signal to the electric signal sent from electric time domain delay coding module and carries out optical frequency domain coding, and the optical signal after two-dimentional t λ codings is sent into optical distribution network by photo-coupler or directly and is issued.The present invention has the characteristics that simple possible, reconstitution good, large capacity and rate are high.
Description
Technical field
The present invention relates to technical field of optical fiber communication, and in particular to a kind of local side based on OCDMA two dimension electric light encoding and decoding
R-T unit and its decoding method.
Background technology
Local side R-T unit based on OCDMA is a kind of local side apparatus applied in Optical Access Network central office side, is light
The interface equipment that fibre access net is connect with upper core net.Local side light R-T unit completes the coding of the downlink data of core net simultaneously
It is distributed to optical distribution network and the upstream data from optical distribution network is decoded and is transmitted to core net.
Existing OCDMA local sides transmitting-receiving encoding and decoding technique mainly has：
1. based on fiber bragg grating (FGB) or the full light of the t- λ of array waveguide grating (AWG) and fiber delay line two dimensions
Encoding and decoding, it is sent into FGB after subscriber signal wide spectrum light source and intensity modulator are modulated into optical signal, according to light address code into
Line frequency spectrum cutting coding, then different delayed time is carried out to the optical signal of different wave length respectively and completes time domain coding, finally it is sent into combining
Device couples.This kind of scheme can realize full light high speed encoding and decoding, and user capacity is big, be very potential technology in the long run,
But it realizes the optical device to use Multichannel photoswitch, ASE light sources, light intensity modulator, photo threshold device etc. expensive, equipment cost
It is extremely high, with regard to the state of the art and yield, also it is not enough to attract operator's infusion of financial resources development；
2. based on high-speed chip tradition CDMA, the ambipolar time domain code word of data progress is transmitted to user in electrical domain and is directly expanded
Frequently, and by the transmission data of multiple users it is coupled by way of code division multiplexing, is finally modulated on optical signal and passes through
Optical fiber is transmitted.This kind of scheme cost is more cheap and technology maturation, but ECDMA schemes are to carry out the straight of time domain to electric signal
Extension is connect, electrical domain codec is had to operate on chipping rate, and the processing speed of electrical domain limits chipping rate.If it is
Raising number of users increases code length, then can limit the transmission rate of data；
3. the multistage amplitude coding and decoding scheme of frequency domain based on electrical domain space encoding, it is first according to the address code of different user
Frequency spectrum cutting is carried out to the signal of different user respectively in electrical domain and carries out AND operation, then by each user in all waves
The value of lengthy motion picture is added, that is, is completed Frequency Domain Coding, then signal is sent into light intensity modulator modulation, finally coupled optical signal
Output.This kind of scheme is a kind of electrical domain encoding and decoding technique, is overcome " electronic bottleneck ", and odd jobs are configured, and reconfigurability is strong.But the party
Case belongs to one-dimensional frequency domain encoding and decoding, and user capacity and system performance are all poor.
More than various reasons cause OCDMA to also fail to apply in practice at present, are used in access is netted mostly at present
OTDM and OWDM technologies, it would be highly desirable to a kind of to meet large capacity, high-speed and OCDMA local side R-T units at low cost.
Invention content
It is to be solved by this invention to be existing OCDMA local sides transmitting-receiving decoding method there are of high cost, rate be low and capacity
The problem of small, provides a kind of local side R-T unit and its decoding method based on OCDMA two dimension electric light encoding and decoding.
To solve the above problems, the present invention is achieved by the following scheme：
A kind of decoding method of the local side R-T unit based on OCDMA two dimension electric light encoding and decoding；It is characterized in that including such as
Lower step：
Step 1, the use of downlink that the electric time domain delay coding unit of electric time domain delay coding/decoding module is sent into core net
After family bit stream electric signal carries out electric time domain delay coding and coupling, it is sent into optical frequency domain coding/decoding module；
Step 2, the optical frequency domain coding unit of optical frequency domain coding/decoding module is sent into electric time domain delay coding/decoding module more
After a multistage amplitude electric signal of user carries out optical frequency domain coding and multiplexing, it is sent into optical distribution network；
Step 3, the optical signal that the user that the optical frequency decoding unit of optical frequency domain coding/decoding module is sent into distribution net uploads
After carrying out demultiplexing and optical frequency decoding, it is sent into electric time domain delay coding/decoding module；
Step 4, optical frequency domain coding/decoding module is sent by the electric time domain delay decoding unit of electric time domain delay coding/decoding module
The multistage amplitude electric signal of multiple users carry out decoupling and electric time domain delay decoding and data threshold judgement after, feeding core
Net.
The detailed process of above-mentioned steps 1 is as follows：
Step 1.1, the electricity delay encoder of electric time domain delay coding unit is according to the code of user's light address code weight ω, by core
Each subscriber signal b (t) that heart net is sent into is copied into ω equal portions；And according to code word the district's groups { (a of user's light address code0, b0),
(a1, b1) ..., (aω-1, bω-1), b is carried out at the same time respectively to ω part signals of each user0ε、b1ε、…、bω-1The delay of ε,
Obtain each user ω parts of time delayed signal b (t+b0ε)、b(t+b1ε)、…、b(t+bω-1ε)；
Step 1.2, the final election coupler of electric time domain delay coding unit is according to code word the district's groups { (a of user's light address code0,
b0), (a1, b1) ..., (aω-1, bω-1), by the time delayed signal b (t+b of ω parts of each user0ε)、b(t+b1ε)、…、b(t+
bω-1ε) while progress numeric addition operation in the corresponding adder of final election coupler is sent into, show that all users couple in final election
The multistage amplitude electric signal Σ of Signal averaging value in the 1 of device to N number of adder in respective adders, i.e. N roads0、Σ1、…、ΣN-1,
It is sent to optical frequency domain coding/decoding module.
The detailed process of above-mentioned steps 2 is as follows：
Step 2.1, N number of multistage amplitude electrical to optical converter of optical frequency domain coding unit is by corresponding multistage amplitude value of electrical signals
Σ0、Σ1、…、ΣN-1Wavelength is respectively converted into as λ0、λ1、…、λN-1Multistage amplitude optical signal；
Step 2.2, N roads wavelength is λ0、λ1、…、λN-1Multistage amplitude optical signal be sent into optical frequency domain coding unit wavelength-division
Multiplexer carries out channel multiplexing, and is issued to distribution net.
The detailed process of above-mentioned steps 3 is as follows：
Step 3.1, the wavelength-division that the multistage amplitude optical signal of single channel for distributing net feeding is sent into optical frequency decoding unit demultiplexes
It is demultiplexed with device, decomposites wavelength as λ0、λ1、…、λN-1Multistage amplitude optical signal；
Step 3.2, wavelength is respectively λ by the multistage amplitude photoelectric converter of optical frequency decoding unit0、λ1、…、λN-1It is more
Rank amplitude optical signal is converted into N number of multistage amplitude electric signal b0(t)、b1(t)、…、bN-1(t), electric time domain delay encoding and decoding are sent into
Module.
The detailed process of above-mentioned steps 4 is as follows：
Step 4.1, the distributor of electric time domain delay decoding unit is according to code word the district's groups { (a of each user's light address code0,
b0), (a1, b1) ..., (aω-1, bω-1), from N number of multistage amplitude electric signal b of feeding0(t)、b1(t)、…、bN-1(t) in simultaneously
It extracts the multistage amplitude electric signal of relevant wavelength piece and is distributed to each user；
Step 4.2, electric code word area of the decoder according to each user's light address code that be delayed of electric time domain delay decoding unit
Group { (a0, b0), (a1, b1) ..., (aω-1, bω-1), the ω wavelength piece signal for each user is delayed accordingly respectively,
It is carried out at the same time (L-1-b respectively0)ε、(L-1-b1)ε、…、(L-1-bω-1) ε delay, obtain each user ω parts multistage
Electric signal after magnitude time delay
The multistage magnitude time delay electric signal of each ω parts of user is carried out at the same time add operation, obtains each user ω parts of multistage amplitude and prolongs
When coupled electrical signal
Step 4.3, the data decision device of electric time domain delay decoding unit couples telecommunications to the multistage magnitude time delay after coupling
Number each pulse threshold judgement is carried out, obtain data 1 or 0, and be uploaded to core net.
Based on the local side R-T unit of OCDMA two dimension electric light encoding and decoding, including electric time domain delay coding/decoding module, optical frequency domain
Coding/decoding module, system management module and power management module；Power management module respectively with electric time domain be delayed coding/decoding module
It is connected with the feeder ear of optical frequency domain coding/decoding module；System management module is delayed coding/decoding module and optical frequency domain with electric time domain respectively
The control terminal of coding/decoding module is connected；Electric time domain delay coding/decoding module includes electric time domain delay coding unit and electric time domain is delayed
Decoding unit；Optical frequency domain coding/decoding module includes optical frequency domain coding unit and optical frequency decoding unit；Core net is prolonged with electric time domain
When coding unit input terminal connection, the input terminal of the output terminal and optical frequency domain coding unit of electric time domain delay coding unit connects
It connects, output terminal and the distribution net connection of optical frequency domain coding unit；Distribution net is connect with the input terminal of optical frequency decoding unit, optical frequency
The output terminal of domain decoding unit is connect with the input terminal of electric time domain delay decoding unit, the output terminal of electric time domain delay decoding unit
Connect core net.
Above device still further comprises optical circulator, the Single port connection distribution net of the optical circulator, optical circulator
Another port connects the output terminal of optical frequency domain coding unit, the input of the another port connection optical frequency decoding unit of optical circulator
End.
In said program, electric time domain delay coding unit includes electricity delay encoder and final election coupler, wherein electricity delay
The input terminal of encoder forms the input terminal of electric time domain delay coding unit, the output terminal connection final election coupling of electricity delay encoder
The input terminal of device, the output terminal of final election coupler form the output terminal of electric time domain delay coding unit；Electric time domain delay decoding is single
Member includes distributor, electricity delay decoder and data decision device；The input terminal of distributor forms electric time domain delay decoding unit
Input terminal, the input terminal of the output terminal connection electricity delay decoder of distributor, the output terminal connection data of electricity delay decoder are sentenced
The certainly input terminal of device, the output terminal of the output terminal electricity time domain delay decoding unit of data decision device.
In said program, optical frequency domain coding unit includes multiple multistage amplitude electricals to optical converter and wavelength division multiplexer；It is multiple
The input terminal of multistage amplitude electrical to optical converter is formed simultaneously the input terminal of optical frequency domain coding unit, multiple multistage amplitude electro-optic conversions
The output terminal of device is connect simultaneously with the input terminal of wavelength division multiplexer, and the output terminal of wavelength division multiplexer forms optical frequency domain coding unit
Output terminal；Optical frequency decoding unit includes multiple multistage amplitude photoelectric converters and Wave decomposing multiplexer；Wave decomposing multiplexer
Input terminal forms the input terminal of optical frequency decoding unit, and the output terminal of Wave decomposing multiplexer connects multiple multistage amplitude photoelectricity respectively
The input terminal of converter, the output terminal of multiple multistage amplitude photoelectric converters are formed simultaneously the output terminal of optical frequency decoding unit.
Compared with prior art, the present invention has following features：
1st, electric time domain delay encoding and decoding are carried out in the time domain, avoid Multichannel photoswitch, ASE light sources, light intensity modulator,
The extremely expensive optical device such as photo threshold device, reduces cost and equipment complexity；
2nd, it is two dimension OCDMA in the time domain into the encoding and decoding of frequency domain have been carried out after line delay encoding and decoding, relatively one-dimensional electrical domain
Encoding and decoding substantially increase system user capacity；
3rd, hardware programming is carried out using the parallel FPGA of high speed, improves the reconfigurability of encoding and decoding, and using electric light
Encoding and decoding are combined, are inhibited to a certain extent " electronic bottleneck "；
4th, the technique effect for having simple possible, reconstitution good, large capacity, rate high.
Description of the drawings
Fig. 1 is the principle schematic of the local side R-T unit based on OCDMA two dimension electric light encoding and decoding.
Fig. 2 is the refinement structure diagram of the local side R-T unit based on OCDMA two dimension electric light encoding and decoding.
Fig. 3 is the schematic diagram of the decoding method of the local side R-T unit based on OCDMA two dimension electric light encoding and decoding.
Specific embodiment
For the thought of the apparent expression present invention, with reference to shown in Fig. 1 to Fig. 3, provide one kind of the invention and preferably implement
The present invention is further described in mode (include but not limited to this specific implementation structure).
Based on the local side R-T unit of OCDMA two dimension electric light encoding and decoding, as illustrated in fig. 1 and 2, it is delayed including electric time domain and compiles solution
Code module, optical frequency domain coding/decoding module, optical circulator, system management module and power management module.Power management module is distinguished
It is connected with the feeder ear of electric time domain delay coding/decoding module and optical frequency domain coding/decoding module.System management module respectively with electric time domain
Delay coding/decoding module is connected with the control terminal of optical frequency domain coding/decoding module.Electric time domain delay coding/decoding module includes electric time domain and prolongs
When coding unit and electric time domain be delayed decoding unit.Optical frequency domain coding/decoding module includes optical frequency domain coding unit and optical frequency decoding
Unit.The output terminal of core net is connect with the input terminal of electric time domain delay coding unit, the output of electric time domain delay coding unit
End is connect with the input terminal of optical frequency domain coding unit, and the output terminal of optical frequency domain coding unit and one end of optical circulator connect.Light
The other end connection distribution net of circulator.The input terminal of the another end connection optical frequency decoding unit of optical circulator, light Frequency Domain Solution
The output terminal of code unit is connect with the input terminal of electric time domain delay decoding unit, the output terminal connection of electric time domain delay decoding unit
The input terminal of core net.
System management module connect with electric time domain delay coding/decoding module and optical frequency domain coding/decoding module and controls its work,
Light two-dimensional address codes, the subscriber signal delay of the electric time domain delay coding/decoding module of control and coupling are distributed including for every user
It closes, the frequency spectrum wave plate selection of control optical frequency domain coding/decoding module.In addition, system management module is also responsible for detection home environment ginseng
Number, management optical network unit at remote side simultaneously carry out the matching of light address code for it, are uploaded to local parameter by telecommunication administration interface
The management and control of Network Management System and response to network management system.System administration control module is by central processing unit, reservoir, network
The dedicated computer hardwares systems such as communication interface, local communication control interface, display interface form.Wherein, central processing unit can
The S3C6410 chips of Samsung are selected, Nand Flash chips can be selected in reservoir, and DM9000 can be selected in network communication chip
Network card chip, central processing unit pass through serial ports and electric time domain delay coding/decoding module, optical frequency domain coding/decoding module connection communication.System
Management module of uniting operation Linux embedded OSs, and installation and operation has corresponding embedded management and control software, software package contains
The delay of electric time domain delay coding unit and Coupling Control Unit, and be responsible for communicating with Network Management System, with other hardware coordinations
Realize above-mentioned function.
Electric time domain delay coding unit includes electricity delay encoder and n ω × N final election couplers, wherein electricity delay encoder
Input terminal form the input terminal of electric time domain delay coding unit, the output terminal connection final election coupler of electricity delay encoder it is defeated
Enter end, the output terminal of final election coupler forms the output terminal of electric time domain delay coding unit.Optical frequency domain coding unit includes N number of more
Rank amplitude electrical to optical converter and wavelength division multiplexer.The input terminal of multiple multistage amplitude electricals to optical converter is formed simultaneously optical frequency domain coding
The input terminal of unit, the output terminal of multiple multistage amplitude electricals to optical converter are connect simultaneously with the input terminal of wavelength division multiplexer, wavelength-division
The output terminal of multiplexer forms the output terminal of optical frequency domain coding unit.Electric time domain delay coding unit connection optical frequency domain coding list
The n user data electric signal that core net issues is carried out at the same time time domain by member according to unique light address code that each user distributes
Delay coding, the signal after time domain coding coupled, the electric signal feeding optical frequency domain coding after then n user is coupled
Unit is carried out at the same time Frequency Domain Coding according to light address code.Optical frequency domain coding unit is to from the electricity sent of electric time domain delay coding unit
Signal is converted into optical signal and carries out optical frequency domain coding, and by the optical signal after two-dimentional t- λ codings by optical circulator or
Person is directly sent into optical distribution network and issues.
Electric time domain delay decoding unit includes N × n ω distributors, electricity delay decoder and data decision device.Distributor
Input terminal forms the input terminal of electric time domain delay decoding unit, and the output terminal of distributor connects the input terminal of electricity delay decoder,
The input terminal of the output terminal connection data decision device of electricity delay decoder, the output terminal electricity time domain delay decoding of data decision device are single
The output terminal of member.Optical frequency decoding unit includes multiple multistage amplitude photoelectric converters and Wave decomposing multiplexer.Wavelength-division demultiplexes
The input terminal of device forms the input terminal of optical frequency decoding unit, and the output terminal of Wave decomposing multiplexer connects multiple multistage amplitudes respectively
The input terminal of photoelectric converter, the output terminal of multiple multistage amplitude photoelectric converters are formed simultaneously the output of optical frequency decoding unit
End.Decoding process is with cataloged procedure on the contrary, the optical signal that optical frequency decoding unit uploads optical distribution network carries out frequency domain decoding simultaneously
Electric time domain delay decoding unit progress time domain decoding is sent into after being converted into optical signal, output will be uploaded to the decoding electricity of core net
Signal.
The dedicated igh-speed wire-rod production line chip portfolio of polylith can be used to complete the function mould for electric time domain delay coding/decoding module
Block, such as using electricity delay encoder chip, n ω × N final elections coupler chip, n ω × N distributors, electricity delay decoder chip
It is interconnected with data decision device chip, common real electric time-domain signal delay encoding and decoding.But best mode is should be using hardware
Description language carries out hardware programming design to high speed fpga chip, play FPGA high-speed parallels, it is flexibly restructural the characteristics of, to electricity
The signal of time domain carries out restructural delay high speed encoding and decoding, maximal efficiency, integrated realization functions of modules.In addition, optical frequency
Domain coding/decoding module can be used the multistage amplitude optical transceiver module of different wave length as multistage amplitude electrical to optical converter to different
The multistage amplitude electric signal of adder carries out the encoding and decoding in optical frequency domain.Or the high-speed A/D converter of adaptation can be used, driven
Dynamic circuit and BOSA (light emitting receiving unit) work in combination carry out the encoding and decoding in optical frequency domain.
In above-mentioned local side light R-T unit, the delay encoding and decoding and signal coupling of electric time domain delay coding/decoding module and
Key technology scheme of the frequency domain decoding method of optical frequency domain coding/decoding module for the present invention.That is, based on OCDMA two dimensions
The decoding method of the local side R-T unit of electric light encoding and decoding, as shown in figure 3, specifically comprising the following steps：
According to optical code division multiple access theory, user's light address code collection (N × L, ω, λa, λb) in N be frequency chip (wave plate) number,
L is the timeslice number of light address code, and ω is heavy (number of " 1 ") for code, λaAnd λbFor auto-correlation and cross-correlation peak value；It is each to use
Code word matrix of the family code word for a N × L, (a0, b0)、(a1, b1)、…、(aω-1, bω-1) coordinate for " 1 " in code word matrix；b
(t) it is user's Bitstream signal；ε is bits of user data pulse width.
In examples of implementation, user's light address code collection be (N × L, 3,1,1), be user 1,2,3 ..., n select (0,1),
(2,7), (6,32) }, (1,3), (2,9), (4,45) }, { (1,6), (3,14), (7,33) } ..., { (5,9), (6,11), (N-
1, L-1) } as light address code.Illustrate decoding method process of the present invention by taking user 1 and user 2 as an example below：
User's bit stream electric signal of step 1. downlink enters the electric time domain of electric time domain delay coding/decoding module from core net
It is delayed after coding unit, coding and coupling process realize that process is as follows：
A. the electricity delay encoder of the unit is according to n user's light address code collection (N × L, 3,1,1), by user 1 and user
2 signal b1(t) and b2(t) it is copied into 3 equal portions respectively, at this point, this 6 parts of bit streams are simultaneously and concurrently signal；
B. the unit electricity delay encoder according to the code word district's groups of user 1 and the light address code of user 2 (0,1), (2,
7), (6,32) } and { (1,3), (2,9), (4,45) } are carried out at the same time 6 parts of signals ε, 7 ε, 6 ε and 3 ε respectively, 9 ε, 45 ε prolong
When, obtain 6 parts of the time delayed signal b of user 1 and user 21(t+ε)、b1(t+7ε)、b1(t+32 ε) and b2(t+3ε)、b2(t+9ε、
b2(t+45ε)；
C. n ω × N final elections couplers of the unit according to the code word district's groups of user 1 and the light address code of user 2 (0,1),
(2,7), (6,32) } and { (1,3), (2,9), (4,45) } by user 1 and 6 parts of time delayed signal b of user 21(t+ε)、b1(t+7
ε)、b1(t+6ε)、b2(t+3 ε, b2t+9 ε, b2 (t+45 ε) are sent into adder Σ 0, Σ 2, Σ 6, Σ 1, Σ 2, Σ 4 simultaneously respectively
Numeric addition operation is carried out, obtains superposition value (the multistage width of user 1 and user 2 on adder Σ 0, Σ 1, Σ 2, Σ 4, Σ 6
Spend signal)；
D. by the value of N-1 adder, the corresponding optical frequency domain coding/decoding module that is sent to carries out Frequency Domain Coding to the unit respectively.
Step 2. user multistage amplitude electric signal is from the electric time domain delay coding unit of electric time domain delay coding/decoding module
After N-1 adder is sent into optical frequency domain coding unit, coding and multiplexing method realize that process is as follows：
A. the unit wavelength is λ0、λ1、λ2、λ4、λ6Multistage amplitude electrical to optical converter by the multistage amplitude of respective adders
Value of electrical signals Σ0、Σ1、Σ2、Σ4、Σ6Wavelength is respectively converted into as λ0、λ1、λ2、λ4、λ6Multistage amplitude optical signal；
B. N roads wavelength is λ by the unit0、λ1、λ2、…、λN-1Multistage amplitude optical signal be sent into the wavelength division multiplexer of N × 1 into
Row channel multiplexing.
It compiles in the optical frequency domain that the optical signal that step 3. user uploads is sent into local side light R-T unit after the coupling of optical distribution network
After the optical frequency domain coding unit of decoder module, demultiplexing and coding/decoding method realize that process is as follows：
A. the multistage amplitude optical signal of single channel is sent into 1 × L Wave decomposing multiplexers and demultiplexed by the unit, decomposites wavelength
For λ0、λ1、λ2、…、λN-1Multistage amplitude optical signal；
B. the unit wavelength is λ0、λ1、λ2、λ4、λ6Multistage amplitude photoelectric converter respectively by wavelength be λ0、λ1、λ2、λ4、
λ6Multistage amplitude optical signal be converted into N number of multistage amplitude electric signal bλ0(t)、bλ1(t)、bλ2(t)、bλ4(t)、bλ6(t) it is sent into electricity
Time domain delay coding/decoding module.
N number of multistage amplitude electric signal of step 4. user is sent into electricity from the optical frequency domain coding unit of optical frequency domain coding/decoding module
After the electric time domain delay decoding unit of time domain delay coding/decoding module, decoupling and decoded method realizes that process is as follows：
A. N × n ω distributors of the unit according to the code word district's groups of user 1 and the light address code of user 2 (0,1), (2,
7), (6,32) } and { (1,3), (2,9), (4,45) }, from N number of multistage amplitude electric signal b of feedingλ0(t)、bλ1(t)、bλ2(t)、
bλ4(t)、bλ6(t) extracting the multistage amplitude electric signal of relevant wavelength piece is distributed to user 1 and user 2 simultaneously in, respectively obtains：
bλ0(t)、bλ2(t)、bλ6(t) and bλ1(t)、bλ2(t)、bλ4(t)；
B. the unit electricity delay decoder according to the code word district's groups of user 1 and the light address code of user 2 (0,1), (2,
7), (6,32) } and { (1,3), (2,9), (4,45) }, 6 wavelength piece signals for user 1 and user 2 carry out accordingly respectively
Delay is carried out at the same time (L-1-1) ε, (L-1-7) ε, (L-1-32) ε, (L-1-3) ε, (L-1-9) ε, (L-1-45) ε respectively
Delay, obtains the electric signal after 6 parts of the multistage magnitude time delay of user 1 and user 2：bλ0(t+(L-1-1)ε)、bλ2(t+(L-1-
7)ε)、bλ6(t+ (L-1-32) ε) and bλ1(t+(L-1-3)ε)、bλ2(t+(L-1-9)ε)、bλ4(t+(L-1-45)ε)；
C. the unit is carried out at the same time 6 parts of the multistage magnitude time delay electric signal of electricity delay decoder user 1 and user 2 and adds
Method operation, the multistage magnitude time delay coupled electrical signal for obtaining user 1 and user 2 are respectively：bλ0(t+(L-1-1)ε)+bλ2(t+
(L-1-7)ε)+bλ6(t+ (L-1-32) ε) and bλ1(t+(L-1-3)ε)+bλ2(t+(L-1-9)ε)+bλ4(t+(L-1-45)ε)；
D. the data decision device of the unit carries out each pulse threshold to the multistage magnitude time delay coupled electrical signal after coupling
Judgement, the coupling value of each user obtain user Yi Dan more than " 1 " is judged to once some threshold value (depending on specific code word set)
1 and data " 1 " or " 0 " of user 2, and it is uploaded to core net.
The above embodiment can carry out the variation in several implementations without departing from the scope of the present invention, therefore above specific
Implement explanation should be regarded as it is illustrative, not limiting the protection domain of the present patent application patent.
Claims (9)
1. the decoding method of the local side R-T unit based on OCDMA two dimension electric light encoding and decoding；It is characterized in that including walking as follows
Suddenly：
Step 1, the user of the downlink ratio that the electric time domain delay coding unit of electric time domain delay coding/decoding module is sent into core net
After special galvanic electricity signal carries out electric time domain delay coding and coupling, it is sent into optical frequency domain coding/decoding module；
Step 2, multiple use that the optical frequency domain coding unit of optical frequency domain coding/decoding module is sent into electric time domain delay coding/decoding module
After the multistage amplitude electric signal in family carries out optical frequency domain coding and multiplexing, it is sent into optical distribution network；
Step 3, the optical signal that the user that the optical frequency decoding unit of optical frequency domain coding/decoding module is sent into distribution net uploads carries out
After demultiplexing and optical frequency decoding, it is sent into electric time domain delay coding/decoding module；
Step 4, optical frequency domain coding/decoding module is sent into more by the electric time domain delay decoding unit of electric time domain delay coding/decoding module
After a multistage amplitude electric signal of user carries out decoupling and electric time domain delay decoding and data threshold judgement, it is sent into core net.
2. the decoding method of the local side R-T unit according to claim 1 based on OCDMA two dimension electric light encoding and decoding；It is special
Sign is that the detailed process of step 1 is as follows：
Step 1.1, the electricity delay encoder of electric time domain delay coding unit is according to the code of user's light address code weight ω, by core net
The each subscriber signal b (t) being sent into is copied into ω equal portions；And according to code word the district's groups { (a of user's light address code0, b0), (a1,
b1) ..., (aω-1, bω-1), b is carried out at the same time respectively to ω part signals of each user0ε、b1ε、…、bω-1The delay of ε, obtains
Time delayed signal b (the t+b of each ω parts of user0ε)、b(t+b1ε)、…、b(t+bω-1ε)；
Step 1.2, the final election coupler of electric time domain delay coding unit is according to code word the district's groups { (a of user's light address code0, b0),
(a1, b1) ..., (aω-1, bω-1), by the time delayed signal b (t+b of ω parts of each user0ε)、b(t+b1ε)、…、b(t+bω-1
ε) while progress numeric addition operation in the corresponding adder of final election coupler is sent into, obtains all users in final election coupler
Signal averaging value on 1 to respective adders in N number of adder, the i.e. multistage amplitude electric signal Σ in N roads0、Σ1、…、ΣN-1, it is sent into
To optical frequency domain coding/decoding module.
3. the decoding method of the local side R-T unit according to claim 1 based on OCDMA two dimension electric light encoding and decoding；It is special
Sign is that the detailed process of step 2 is as follows：
Step 2.1, N number of multistage amplitude electrical to optical converter of optical frequency domain coding unit is by corresponding multistage amplitude value of electrical signals Σ0、
Σ1、…、ΣN-1Wavelength is respectively converted into as λ0、λ1、…、λN-1Multistage amplitude optical signal；
Step 2.2, N roads wavelength is λ0、λ1、…、λN-1Multistage amplitude optical signal be sent into optical frequency domain coding unit wavelength-division multiplex
Device carries out channel multiplexing, and is issued to distribution net.
4. the decoding method of the local side R-T unit according to claim 1 based on OCDMA two dimension electric light encoding and decoding；It is special
Sign is that the detailed process of step 3 is as follows：
Step 3.1, the multistage amplitude optical signal of single channel for distributing net feeding is sent into the Wave decomposing multiplexer of optical frequency decoding unit
It is demultiplexed, decomposites wavelength as λ0、λ1、…、λN-1Multistage amplitude optical signal；
Step 3.2, wavelength is respectively λ by the multistage amplitude photoelectric converter of optical frequency decoding unit0、λ1、…、λN-1Multistage width
Degree optical signal is converted into N number of multistage amplitude electric signal b0(t)、b1(t)、…、bN-1(t), it is sent into electric time domain delay coding/decoding module.
5. the decoding method of the local side R-T unit according to claim 1 based on OCDMA two dimension electric light encoding and decoding；It is special
Sign is that the detailed process of step 4 is as follows：
Step 4.1, the distributor of electric time domain delay decoding unit is according to code word the district's groups { (a of each user's light address code0, b0),
(a1, b1) ..., (aω-1, bω-1), from N number of multistage amplitude electric signal b of feeding0(t)、b1(t)、…、bN-1(t) it is extracted simultaneously in
The relevant multistage amplitude electric signal of wavelength piece is distributed to each user；
Step 4.2, electric code word district's groups of the decoder according to each user's light address code that are delayed of electric time domain delay decoding unit
{(a0, b0), (a1, b1) ..., (aω-1, bω-1), the ω wavelength piece signal for each user is delayed accordingly respectively, i.e.,
It is carried out at the same time (L-1-b respectively0)ε、(L-1-b1)ε、…、(L-1-bω-1) ε delay, obtain each user ω parts of multistage width
Electric signal after degree delay
The multistage magnitude time delay electric signal of each ω parts of user is carried out at the same time add operation, obtains each user ω parts of multistage amplitude and prolongs
When coupled electrical signal
Step 4.3, the data decision device of electric time domain delay decoding unit to the multistage magnitude time delay coupled electrical signal after coupling into
The each pulse threshold judgement of row, obtains data 1 or 0, and be uploaded to core net.
6. the local side R-T unit based on OCDMA two dimension electric light encoding and decoding, it is characterised in that：Including electric time domain delay encoding and decoding mould
Block, optical frequency domain coding/decoding module, system management module and power management module；
Feeder ear of the power management module respectively with electric time domain delay coding/decoding module and optical frequency domain coding/decoding module is connected；System
Control terminal of the management module respectively with electric time domain delay coding/decoding module and optical frequency domain coding/decoding module is connected；
Electric time domain delay coding/decoding module includes electric time domain delay coding unit and electric time domain delay decoding unit；Compile solution in optical frequency domain
Code module includes optical frequency domain coding unit and optical frequency decoding unit；
Core net is connect with the input terminal of electric time domain delay coding unit, the output terminal of electric time domain delay coding unit and optical frequency domain
The input terminal connection of coding unit, output terminal and the distribution net connection of optical frequency domain coding unit；
Distribution net is connect with the input terminal of optical frequency decoding unit, and the output terminal of optical frequency decoding unit is decoded with electric time domain delay
The input terminal connection of unit, the output terminal connection core net of electric time domain delay decoding unit.
7. the local side R-T unit according to claim 6 based on OCDMA two dimension electric light encoding and decoding, it is characterised in that：Also into
One step includes optical circulator, and the Single port connection distribution net of the optical circulator, the another port connection optical frequency domain of optical circulator is compiled
The output terminal of code unit, the input terminal of the another port connection optical frequency decoding unit of optical circulator.
8. the local side R-T unit according to claim 6 based on OCDMA two dimension electric light encoding and decoding, it is characterised in that：
Electric time domain delay coding unit includes electricity delay encoder and final election coupler, wherein the input terminal shape of electricity delay encoder
Into the input terminal of electric time domain delay coding unit, the input terminal of the output terminal connection final election coupler of electricity delay encoder, final election
The output terminal of coupler forms the output terminal of electric time domain delay coding unit；
Electric time domain delay decoding unit includes distributor, electricity delay decoder and data decision device；The input terminal of distributor is formed
The input terminal of electric time domain delay decoding unit, the input terminal of the output terminal connection electricity delay decoder of distributor, electricity delay decoding
The input terminal of the output terminal connection data decision device of device, the output of the output terminal electricity time domain delay decoding unit of data decision device
End.
9. the local side R-T unit according to claim 6 based on OCDMA two dimension electric light encoding and decoding, it is characterised in that：
Optical frequency domain coding unit includes multiple multistage amplitude electricals to optical converter and wavelength division multiplexer；Multiple multistage amplitude electro-optic conversions
The input terminal of device is formed simultaneously the input terminal of optical frequency domain coding unit, the output terminals of multiple multistage amplitude electricals to optical converter simultaneously with
The input terminal connection of wavelength division multiplexer, the output terminal of wavelength division multiplexer form the output terminal of optical frequency domain coding unit；
Optical frequency decoding unit includes multiple multistage amplitude photoelectric converters and Wave decomposing multiplexer；The input of Wave decomposing multiplexer
End forms the input terminal of optical frequency decoding unit, and the output terminal of Wave decomposing multiplexer connects multiple multistage amplitude opto-electronic conversions respectively
The input terminal of device, the output terminal of multiple multistage amplitude photoelectric converters are formed simultaneously the output terminal of optical frequency decoding unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610583520.9A CN106059703B (en) | 2016-07-22 | 2016-07-22 | Local side R-T unit and its decoding method based on OCDMA two dimension electric light encoding and decoding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610583520.9A CN106059703B (en) | 2016-07-22 | 2016-07-22 | Local side R-T unit and its decoding method based on OCDMA two dimension electric light encoding and decoding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106059703A CN106059703A (en) | 2016-10-26 |
| CN106059703B true CN106059703B (en) | 2018-06-29 |
Family
ID=57418512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610583520.9A Active CN106059703B (en) | 2016-07-22 | 2016-07-22 | Local side R-T unit and its decoding method based on OCDMA two dimension electric light encoding and decoding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106059703B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108494491A (en) * | 2018-03-08 | 2018-09-04 | 广西师范大学 | A kind of electric light encoding and decoding R-T unit and decoding method |
| CN108777715A (en) * | 2018-06-06 | 2018-11-09 | 成都邑教云信息技术有限公司 | A kind of high efficiency Internet Educational System |
| CN108834001B (en) * | 2018-08-01 | 2021-04-30 | 钦州学院 | Electromagnetic remote measuring system and method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1571306A (en) * | 2004-04-30 | 2005-01-26 | 北京大学 | Optical CDMA wavelength-time domain two-dimensional optical orthogonal code coder and decoder |
| WO2004092776A3 (en) * | 2003-04-15 | 2005-02-24 | Yeda Res & Dev | Method and system for use in optical code division multiple access |
| CN102237946A (en) * | 2010-04-23 | 2011-11-09 | 中兴通讯股份有限公司 | Reconfigurable coder/decoder and optical code division multiple access (OCDMA) passive optical network (PON) based on same |
| CN102882631A (en) * | 2012-10-16 | 2013-01-16 | 广西师范大学 | Optical code demultiplexing/multiplexing sending and receiving method and device based on electric domain encoding/decoding |
| CN104486696A (en) * | 2014-12-22 | 2015-04-01 | 东南大学 | Reconfigurable two-dimensional optical encoder and encoding method based on photoswitch and light reflector |
| CN105071893A (en) * | 2015-07-24 | 2015-11-18 | 天津大学 | Novel large user capacity optical code division multiple access codec |
| CN205847287U (en) * | 2016-07-22 | 2016-12-28 | 广西师范大学 | Local side R-T units based on OCDMA two dimension electric light encoding and decoding |
-
2016
- 2016-07-22 CN CN201610583520.9A patent/CN106059703B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004092776A3 (en) * | 2003-04-15 | 2005-02-24 | Yeda Res & Dev | Method and system for use in optical code division multiple access |
| CN1571306A (en) * | 2004-04-30 | 2005-01-26 | 北京大学 | Optical CDMA wavelength-time domain two-dimensional optical orthogonal code coder and decoder |
| CN102237946A (en) * | 2010-04-23 | 2011-11-09 | 中兴通讯股份有限公司 | Reconfigurable coder/decoder and optical code division multiple access (OCDMA) passive optical network (PON) based on same |
| CN102882631A (en) * | 2012-10-16 | 2013-01-16 | 广西师范大学 | Optical code demultiplexing/multiplexing sending and receiving method and device based on electric domain encoding/decoding |
| CN104486696A (en) * | 2014-12-22 | 2015-04-01 | 东南大学 | Reconfigurable two-dimensional optical encoder and encoding method based on photoswitch and light reflector |
| CN105071893A (en) * | 2015-07-24 | 2015-11-18 | 天津大学 | Novel large user capacity optical code division multiple access codec |
| CN205847287U (en) * | 2016-07-22 | 2016-12-28 | 广西师范大学 | Local side R-T units based on OCDMA two dimension electric light encoding and decoding |
Non-Patent Citations (2)
| Title |
|---|
| A 10 Gbit/s OCDMA system based on electric encoding and optical transmission;LI Chuan-qi等;《OPTOELECTRONICS LETTERS》;20131130;第9卷(第6期);0473-0476 * |
| ＳＡＣ－ＯＣＤＭＡ系统中二维地址码设计及性能研究;张秀容等;《广西师范大学学报（自然科学版）》;20160630;第34卷(第2期);28-34 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106059703A (en) | 2016-10-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1859810B (en) | Passive optical network of multiple optical cut-in net shared optical fiber distribution net and realizing method | |
| CN106059703B (en) | Local side R-T unit and its decoding method based on OCDMA two dimension electric light encoding and decoding | |
| CN1481105A (en) | Wave division multiroute multiplying passive optical network system | |
| CN101902666A (en) | Optical code-division multiple-access (OCDMA) passive optical network system, optical distribution network device and optical line terminal | |
| CN101848054A (en) | System and method for leading wavelength division multiplexing passive optical network to realize broadcast function with self-healing function | |
| CN106487508A (en) | A kind of quantum-key distribution and wavelength-division multiplex optical access network fusion method | |
| CN205847287U (en) | Local side R-T units based on OCDMA two dimension electric light encoding and decoding | |
| CN105144615B (en) | Increase the capacity of WDM-PON using Wavelength reuse | |
| JP6034977B2 (en) | Remote node device, optical network unit, and system and communication method thereof | |
| CN103402148B (en) | Sending and receiving methods and the device thereof of the integration of three networks is realized based on Optical Code Division Multiplexing | |
| CN108494491A (en) | A kind of electric light encoding and decoding R-T unit and decoding method | |
| CN103067089B (en) | ROF and WDM-PON emerging system and method for transmitting signals thereof | |
| CN101568045B (en) | System for saving single-fiber bidirectional hybrid passive optical network decoder/coder and transmission method | |
| CN104468036B (en) | One kind is based on WSS codes reconstruct light coder/decoder | |
| ATE475270T1 (en) | OPTICAL CROSS CONNECTOR WITH MULTI-LEVEL CLOS NETWORK, WHERE A SINGLE-LEVEL MATRIX COMPRISES ONE LEVEL OF THE CLOS NETWORK | |
| CN205961137U (en) | Two -dimentional OCDMA of electricity territory encoding and decoding sends and receiving arrangement | |
| CN106506064B (en) | A kind of three-dimensional passive optical access network realizes the system and method for multiple protective and extension function | |
| CN105187130A (en) | Fiber Bragg Grating (FBG) cascading shunt encoding device and encoding and decoding methods | |
| CN105743580B (en) | A kind of data center's internal network interconnection structure based on multiple array waveguide gratings | |
| CN203492164U (en) | Transmitting device and receiving device of realizing triple play based on optical code division multiplexing | |
| CN110719422B (en) | Method and system for transmitting high-definition multimedia interface HDMI signal | |
| EP1131910B1 (en) | Code-based optical networks, methods, and apparatus | |
| Kao et al. | Design of high bandwidth photonic NoC architectures using optical multilevel signaling | |
| CN212463225U (en) | Optical wave division multiplexing device and system | |
| US8391718B2 (en) | Passive optical communication network system extendable with codec modules |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |