CN101873296A - Method, system and device for implementing orthogonal optical mark switching technique - Google Patents
Method, system and device for implementing orthogonal optical mark switching technique Download PDFInfo
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Abstract
The invention relates to a method, a system, and a device for implementing an orthogonal optical mark switching technique. Payload in optical grouped data is deserialized to form a three-path signal; after being differentially pre-coded, the three-path signal is loaded to a three-phase modulator for phase modulation to generate a differential eight-phase shift keying signal; and the head information in the optical grouped data is loaded onto the amplitude of the differential eight-phase shift keying signal through an amplitude shift keying modulation mode to generate a differential eight phase shift keying/amplitude shift keying orthogonal modulation signal, and then the differential eight phase shift keying/amplitude shift keying orthogonal modulation signal is transmitted, thus increasing transmission capacity of the optical grouped data signal, improving utilization rate of network bandwidth resources and network transmission capacity under the condition that any extra resource consumption is not increased.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of method, system and device of realizing orthogonal optical mark switching technique.
Background technology
Signal exchange (OLS, Optical Label Switching) technology is light packet switching (OPS, Optical Packet Switch) a kind of specific implementation form of technology, can realize that according to signal the full light signal of light grouped data exchanges on the switching node in transmission network, having changed in original transmission network each switching node relies on light-electrical-optical to change the technological means that realizes input, effectively utilize the all-optical network resource, improved switching node transmission bottleneck problem.
Development along with the OLS technology, the OLS derives from technology goes out orthogonal optical mark switching technique, this technology has the higher availability of frequency spectrum and receiver sensitivity, realize separating of mark (being the header in the light grouped data) and load (being the net load in the light grouped data) than being easier to, and do not need strict time synchronized, the service of different brackets can be provided.
The existing used modulation format of orthogonal optical mark switching technique scheme comprises amplitude shift keying (ASK:Amplitude Shift Keying), frequency shift keying (FSK:Frequency-shift keying), phase shift keying (PSK:phase shift keying) etc.But, in the modulation format that above-mentioned existing orthogonal optical mark switching technique scheme is adopted, all the light packet data signals being modulated to one road binary signal transmits, therefore, compare with the multi-system transmission system, the transmission capacity of light packet data signals is less relatively, causes the spectrum efficiency of light packet data signals and efficiency of transmission not high, can't adapt to the big capacity of following transmission network, high-speed transmission requirement.
Summary of the invention
The embodiment of the invention provides a kind of method, system and device of realizing orthogonal optical mark switching technique, thereby has improved network transmission capacity.
The embodiment of the invention provides a kind of method that realizes orthogonal optical mark switching technique, comprising:
Net load in the light grouped data gone here and there and change and form three road signals, and after described three road signals are carried out the difference precoding, be respectively loaded on three phase-modulators and carry out phase modulated, generation difference eight phase shift keyed signals;
Header in the light grouped data is loaded on by the amplitude shift key modulation mode on the amplitude of described difference eight phase shift keyed signals, generates difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal;
Send described difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal.
The embodiment of the invention also provides a kind of system that realizes orthogonal optical mark switching technique, and described system comprises dispensing device and receiving system, and wherein, described dispensing device comprises:
Difference eight phase shift keyed signal generation modules, be used for the net load of light grouped data gone here and there and change and form three road signals, and after described three road signals are carried out the difference precoding, be respectively loaded on three phase-modulators and carry out phase modulated, generate difference eight phase shift keyed signals;
Difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal generation module, be used for the header of light grouped data is loaded on the amplitude of difference eight phase shift keyed signals that described difference eight phase shift keyed signal generation modules generate by the amplitude shift key modulation mode, generate difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal;
Sending module is used to send described difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal.
The embodiment of the invention also provides a kind of device of realizing orthogonal optical mark switching technique, comprising:
Difference eight phase shift keyed signal generation modules, be used for the net load of light grouped data gone here and there and change and form three road signals, and after described three road signals are carried out the difference precoding, be respectively loaded on three phase-modulators and carry out phase modulated, generate difference eight phase shift keyed signals;
Difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal generation module, be used for the header of light grouped data is loaded on the amplitude of difference eight phase shift keyed signals that described difference eight phase shift keyed signal generation modules generate by the amplitude shift key modulation mode, generate difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal;
Sending module is used to send described difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal.
The embodiment of the invention also provides a kind of device of realizing orthogonal optical mark switching technique, comprising:
Receiver module is used to receive difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal;
The signal demodulation module is used for difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal that described receiver module is received, press the power averaging distribution after, carry out difference eight phase shift keyed signal demodulation respectively, and the demodulation of amplitude shift keying signal;
Recovery module, the net load that is used for the described smooth grouped data that demodulates according to difference eight phase shift keyed signals according to described signal demodulation module, and the header of the described smooth grouped data that demodulates according to the amplitude shift keying signal of described signal demodulation module, reduce described smooth grouped data.
The technical scheme that is provided by the invention described above embodiment as can be seen, in the embodiment of the invention, form three road signals by the net load in the light grouped data being gone here and there and changing, and after described three road signals are carried out the difference precoding, be respectively loaded on three phase-modulators and carry out phase modulated, generate difference eight phase shift keyed signals; Header in the light grouped data is loaded on by the amplitude shift key modulation mode on the amplitude of described difference eight phase shift keyed signals, generates difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal; Send described difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal.Thereby under the situation that does not increase any extra resource consumption, increased the transmission capacity of light packet data signals, improved the network bandwidth resources utilance, improved network transmission capacity.
Description of drawings
The described method specific implementation schematic diagram one that Fig. 1 provides for the embodiment of the invention;
The described method specific implementation schematic diagram two that Fig. 2 provides for the embodiment of the invention;
The described method specific implementation schematic diagram three that Fig. 3 provides for the embodiment of the invention;
The described method specific implementation schematic diagram four that Fig. 4 provides for the embodiment of the invention;
The described system configuration schematic diagram one that Fig. 5 provides for the embodiment of the invention;
The described system configuration schematic diagram two that Fig. 6 provides for the embodiment of the invention;
The described system configuration schematic diagram three that Fig. 7 provides for the embodiment of the invention.
Embodiment
The embodiment of the invention provides a kind of method that realizes orthogonal optical mark switching technique, as shown in Figure 1, and by carrying out following steps:
Step 11, net load in the light grouped data gone here and there and change and form three road signals, and after described three road signals are carried out the difference precoding, be respectively loaded on three phase-modulators and carry out phase modulated, generate difference eight phase shift keyings (D8PSK:Differential 8-Level Phase-Shift Keying) signal;
Step 12, header in the light grouped data is loaded on the amplitude of difference eight phase shift keyed signals by amplitude shift keying (ASK:AmplitudeShift Keying) modulation system, generates difference eight phase shift keyings/amplitude shift keying (D8PSK/ASK) orthogonal demodulation signal;
Step 13 sends difference eight phase shift keyings/amplitude shift keying (D8PSK/ASK) orthogonal demodulation signal that generates.
Thereby under the situation that does not increase any extra resource consumption, increased the transmission capacity of optical packet signal, improved the network bandwidth resources utilance, improved network transmission capacity.
In a specific embodiment of the realization orthogonal optical mark switching technique method that the embodiment of the invention provides, for the nonlinear effect that reduces owing to fiber medium causes the chromatic dispersion of signal and introduces each noise like, can carry out power and dispersion compensation to the D8PSK/ASK orthogonal demodulation signal that generates.Such as, can use erbium-doped fiber amplifier (EDFA, Erbium Doped Fiber Amplifiers) to improve the transmitting power of D8PSK/ASK orthogonal demodulation signal, perhaps be amplified in the signal of power attenuation in the Optical Fiber Transmission; For another example, can utilize monomode fiber (SMF, Single Mode Fiber) and dispersion compensating fiber (DCF, Dispersion Compensation Fiber), when long Distance Transmission path being provided for the D8PSK/ASK orthogonal demodulation signal, produce positive and negative signal dispersion respectively.
In another specific embodiment of the realization orthogonal optical mark switching technique method that the embodiment of the invention provides, this method shown in all right accompanying drawing 2, comprises following treatment step after sending the D8PSK/ASK orthogonal demodulation signal:
In embodiments of the present invention, demodulating process for the ASK signal, specifically can comprise as described below: the D8PSK/ASK orthogonal demodulation signal at first passes through narrow-band optical filter (OBPF, OpticalBandpass Filter), the noise that filtering D8PSK/ASK orthogonal demodulation signal is introduced in channel; Pass through photoelectric detector (PIN) again, the ASk signal in the D8PSK/ASK orthogonal optical signal is converted into the signal of telecommunication, and small-signal is amplified by preamplifier; By the filter shape effect of low pass filter (LPF, LowPass Filter), the header demodulation in the light grouped data is come out at last.
In embodiments of the present invention, for the demodulating process of D8PSK signal, specifically can comprise as described below:
With the D8PSK/ASK orthogonal demodulation signal through two grade coupled separation after, form four road identical signals of power, comprise a two paths of signals and a following two paths of signals at this four road signal;
Above-mentioned four road signals are carried out phase information/amplitude information conversion, light/electrical signal conversion, and subtraction decision process respectively;
Handle carrying out the logic XOR, form the 3rd primary signal through subtraction decision process rami posterior inferior two paths of signals;
Will be through going up a two paths of signals respectively as first primary signal and second primary signal after the subtraction decision process, carry out with the 3rd primary signal and go here and there conversion, demodulate the net load of packet data package.
For making the purpose, technical solutions and advantages of the present invention clearer, specific implementation process with a specific embodiment is an example below, and with reference to accompanying drawing 3,4, the method for the realization orthogonal optical mark switching technique that the embodiment of the invention is provided is described in further detail.
At first, will be from the net load (Payload) in the light grouped data of Access Network, be example with 100Gb/s in the embodiment of the invention, become a, b, c three road signals of 33.3Gb/s by string and conversion.
In the embodiment of the invention, can also carry out the difference precoding to three road signals, the logical expression of difference precoding specifically can be as follows:
Wherein, a, b, c represent the burst imported, I
k, Q
k, D
kExpression is the burst of output this moment, I
K-1, Q
K-1, D
K-1The output signal sequence of expression previous moment.
In a preferred embodiment of the present invention, the embodiment of the invention can be passed through field programmable gate array (FPGA:Field-Programmable Gate Array), perhaps other function elements are realized string and the conversion and the difference pre-encode operation of D8PSK signal.
In the embodiment of the invention, can be with in I road signal loading to three phase-modulator (PM) first, promptly on the PM1, the phase change of PM1 is that (0, π), when I road signal was ' 1 ', signal phase was π, and when I road signal was ' 0 ', signal phase was 0; On Q road signal loading to the second a phase-modulator PM2, the phase change of PM2 is (0, pi/2), and when Q road signal was ' 1 ', signal phase was a pi/2, and when Q road signal was ' 0 ', signal phase was 0; On three phase-modulator PM3 of D road signal loading to the, the phase change of PM3 is (0, π/4), and when D road signal was ' 1 ', signal phase was π/4, and when D road signal was ' 0 ', signal phase was 0.
After finishing aforesaid operations, promptly finished D8PSK modulation to net load in the light grouped data, D8PSK signal after the modulation is input to modulator, such as the input port of Mach-Zehnder modulators (M-Z:MZMMach-Zehnder Modulator) modulator.
Then, with the header in the light grouped data (Label), the embodiment of the invention is example with 10Gb/s, be loaded in the modulator, be loaded on by the ASK modulation system on the amplitude of D8PSK, thereby the quadrature of realizing the D8PSK/ASK of signal is united modulation, produce the D8PSK/ASK orthogonal demodulation signal.
For the nonlinear effect that reduces owing to fiber medium causes the chromatic dispersion of signal and introduces each noise like, the embodiment of the invention can be carried out power and dispersion compensation to the D8PSK/ASK orthogonal demodulation signal that generates in process of transmitting.Concrete, two EDFA can be set, after one is arranged at edge router, be used to improve the transmitting power of D8PSK/ASK orthogonal demodulation signal, make D8PSK/ASK orthogonal demodulation signal transmission range long enough in optical fiber; It two is arranged in the transmission path or before the signal receiver, is used for the energy that enhancing signal decays in Optical Fiber Transmission.In addition, can also use SMF, be used for providing long Distance Transmission path, produce the signal positive dispersion simultaneously to the D8PSK/ASK orthogonal demodulation signal of input; And use DCF, be used for providing long Distance Transmission path the positive dispersion that appropriate compensating signal road produces through SMF to the D8PSK/ASK orthogonal demodulation signal.Wherein DCF can place SMF forward and backward or mix with SMF and to be connected.
The embodiment of the invention can also relate to the reception of D8PSK/ASK orthogonal demodulation signal and demodulating process, thus reduction light grouped data.
Concrete, in embodiments of the present invention, can be with the D8PSK/ASK orthogonal demodulation signal process coupler that receives, press power by coupler, to receive D8PSK/ASK orthogonal demodulation signal average mark and be made into two parts, wherein a part of D8PSK/ASK orthogonal demodulation signal enters ASK signal demodulating process, and another part D8PSK/ASK orthogonal demodulation signal enters D8PSK signal demodulating process.
In ASK signal demodulating process, isolated ASK signal in the D8PSK/ASK of coupler orthogonal demodulation signal always, and to the ASK signal detect, amplification, filtering and judgement, thereby the header of demodulation bright dipping grouped data, i.e. signal information.
The demodulation of ASK signal is through specifically comprising following processing:
Choose the proper filter bandwidth by OBPF, be used for the noise that filtering D8PSK/ASK orthogonal demodulation signal is introduced at channel.
By the output signal of PIN and preposition electric amplifier reception OBPF, and the signal strength signal intensity of direct detection orthogonal demodulation signal, being about to the ASK light signal and being converted into the signal of telecommunication, thereby the header demodulation of light grouped data is come out, then that this is the faint signal of telecommunication amplifies.
Receive the output signal of Photoelectric Detection and preposition electric amplifier by low pass filter, the header signal of light grouped data is carried out shaping, reduce the error rate of header.
In D8PSK signal demodulating process, always in the D8PSK/ASK of coupler orthogonal demodulation signal, isolate the D8PSK signal, to the D8PSK signal detect, amplification, filtering and judgement, the net load information in the demodulation bright dipping grouped data.
D8PSK signal demodulating process specifically can comprise following processing procedure:
The D8PSK/ASK orthogonal demodulation signal via first order coupler, is divided for the identical two parts of signals of power, and sends into second level coupler, become the identical signal of four road power by the identical signal of two-way power.For the ease of understanding, can be in the embodiment of the invention with in the accompanying drawing 4, in the signal that can four road power are identical, the two paths of signals that is positioned at the top is referred to as a two paths of signals, and the two paths of signals that is positioned at the below is referred to as down a two paths of signals.
The signal that four road power are identical enters four interferometers respectively, such as Mach-Zehnder modulators (M-Z:MZM Mach-Zehnder Modulator) interferometer, the phase information of four road signals is converted to amplitude information.
In a specific embodiment of the embodiment of the invention, related interferometer can be made of coupler, time delay device, phase-shifter, the time delay device of four interferometers all can be set to 3bit time-delay, the phase shift of phase-shifter be followed successively by 3 π/8 ,-π/8, π/8 ,-3 π/8.
PIN receives the output signal of interferometer, and is converted into the signal of telecommunication.
The subtraction decision device exported and be converted to the signal of telecommunication to same interferometer signal carries out logical decision, if the signal of setting out on a journey deducts down the road signal greater than decision level, then exports high level, otherwise output low level.
In embodiments of the present invention, can be considered as a, the b branch road of net load information in the light grouped data, i.e. first primary signal and second primary signal with going up two paths of signals demodulation after subtraction decision process two paths of signals that comes out; In addition, in the embodiment of the invention, carry out the c branch road that the logical difference exclusive disjunction can obtain net load information in the light grouped data, i.e. the 3rd primary signal again with propping up the two paths of signals two paths of signals that demodulation is come out after adjudicating down; A, b, c three tunnel primary signals are carried out and go here and there conversion obtaining net load information in the complete light grouped data.
Header in the light grouped data that can demodulate according to ASK then, and the net load of the light grouped data that demodulates according to D8PSK, reduction bright dipping grouped data.
Above-mentioned describing as can be seen, the embodiment of the invention is owing to adopt based on D8PSK/ASK quadrature modulation mode mark optical information, make D8PSK and ASK signal belong to same optical wavelength signal, a large amount of network resources have been saved, adopt the modulation system of D8PSK simultaneously as load, improved the spectrum efficiency and the transmission rate of signal, simple, the easy row of this invention makes the signal exchange scheme have more actual operability.
In sum, the method of the realization orthogonal optical mark switching technique that the embodiment of the invention provides, form three road signals by the net load in the light grouped data being gone here and there and changing, and after described three road signals are carried out the difference precoding, be respectively loaded on three phase-modulators and carry out phase modulated, generate difference eight phase shift keyed signals; Header in the light grouped data is loaded on by the amplitude shift key modulation mode on the amplitude of described difference eight phase shift keyed signals, generates difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal; Send described difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal.Thereby under the situation that does not increase any extra resource consumption, increased the transmission capacity of light packet data signals, improved the network bandwidth resources utilance, improved network transmission capacity.
The embodiment of the invention provides a kind of system that realizes orthogonal optical mark switching technique, and as shown in Figure 5, this system comprises dispensing device 51 and receiving system 52.
The dispensing device 51 that the embodiment of the invention provides specifically can comprise:
Difference eight phase shift keyed signal generation modules 511, be used for the net load of light grouped data gone here and there and change and form three road signals, and after described three road signals are carried out the difference precoding, be respectively loaded on three phase-modulators and carry out phase modulated, generate difference eight phase shift keyings (D8PSK:Differential8-Level Phase-Shift Keying) signal.
Concrete, in the embodiment of the invention, can become three road signals by string and conversion at first with from the net load (Payload) in the light grouped data of Access Network.Further can also carry out the difference precoding to three road signals, the logical expression of difference precoding specifically can be as follows:
Wherein, a, b, c represent three bursts importing, I
k, Q
k, D
kExpression is the burst of output this moment, I
K-1, Q
K-1, D
K-1The output signal sequence of expression previous moment.
Then, three road signals respectively by three phase-modulators, are carried out phase modulated, thereby generate the D8PSK signal.
Difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal generation module 512, be used for the header of light grouped data is loaded on the amplitude of the D8PSK signal of difference eight phase shift keyed signal generation modules 511 generations by amplitude shift keying (ASK:Amplitude Shift Keying) modulation system, thereby generate difference eight phase shift keyings/amplitude shift keying (D8PSK/ASK) orthogonal demodulation signal.
Concrete, the embodiment of the invention can be loaded into the header in the light grouped data (Label) in the modulator, is loaded on by the ASK modulation system on the amplitude of D8PSK, thereby the quadrature of realizing the D8PSK/ASK of signal is united modulation, produces the D8PSK/ASK orthogonal demodulation signal.
Sending module 513 is used to send the D8PSK/ASK orthogonal demodulation signal.
For the nonlinear effect that reduces owing to fiber medium causes the chromatic dispersion of signal and introduces each noise like, the sending module 513 that the embodiment of the invention provides can also carry out power and dispersion compensation to the D8PSK/ASK orthogonal demodulation signal that generates.Such as, can use erbium-doped fiber amplifier (EDFA, Erbium Doped Fiber Amplifiers) to improve the transmitting power of D8PSK/ASK orthogonal demodulation signal, perhaps be amplified in the signal of power attenuation in the Optical Fiber Transmission; For another example, can utilize monomode fiber (SMF, Single Mode Fiber) and dispersion compensating fiber (DCF, DispersionCompensation Fiber), when long Distance Transmission path being provided for the D8PSK/ASK orthogonal demodulation signal, produce positive and negative signal dispersion respectively.
The receiving system 52 that the embodiment of the invention provides specifically can comprise:
Concrete, the signal demodulation module 522 that the embodiment of the invention provides specifically can comprise signal distribution unit 61, D8PSK signal demodulation unit 62, and ASK signal demodulation unit 63 as shown in Figure 6.Wherein:
D8PSK signal demodulation unit 62 is used for the net load information from D8PSK signal demodulation bright dipping grouped data.
Concrete, D8PSK signal demodulation unit 62 specifically can comprise as shown in Figure 7:
Signal separation unit 621, be used for the D8PSK/ASK orthogonal demodulation signal through two grade coupled separation after, form four road identical signals of power, described four road signals comprise a two paths of signals and a following two paths of signals;
Signal processing unit 622 is used for 621 isolated described four road signals of signal separation unit are carried out phase information/amplitude information conversion, light/electrical signal conversion, and subtraction decision process respectively;
Logic XOR processing unit 623 is used for handling carrying out the logic XOR through a described following two paths of signals after the subtraction decision process, generates the 3rd primary signal;
Net load demodulating unit 624, being used for will be through the described two paths of signals of going up after the subtraction decision process respectively as first primary signal and second primary signal, the 3rd primary signal that generates with described logic XOR processing unit 623 is carried out and is gone here and there conversion, the net load of demodulation bright dipping grouped data.
ASK signal demodulation unit 63 is used for the header from ASK signal demodulation bright dipping grouped data.
The specific operation process of signal demodulation module 522 please refer in the method for described realization orthogonal optical mark switching technique, relevant for the description of accompanying drawing 3,4.
In sum, the system of the realization orthogonal optical mark switching technique that the embodiment of the invention provides, form three road signals by the net load in the light grouped data being gone here and there and changing, and after described three road signals are carried out the difference precoding, be respectively loaded on three phase-modulators and carry out phase modulated, generate difference eight phase shift keyed signals; Header in the light grouped data is loaded on by the amplitude shift key modulation mode on the amplitude of described difference eight phase shift keyed signals, generates difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal; Send described difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal.Thereby under the situation that does not increase any extra resource consumption, increased the transmission capacity of light packet data signals, improved the network bandwidth resources utilance, improved network transmission capacity.
Need to prove; related dispensing device or receiving system in the system of the realization orthogonal optical mark switching technique that the embodiment of the invention provides; a function element (promptly being independent of outside the system) that can be used as individualism is fully protected; in this case; the function that dispensing device or receiving system can be realized; identical with the function that these two kinds of devices can be realized in system, specifically please refer to the associated description in the system and method.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential hardware platform, can certainly all implement, but the former is better execution mode under a lot of situation by hardware.Based on such understanding, all or part of can the embodying that technical scheme of the present invention contributes to background technology with the form of software product, this computer software product can be stored in the storage medium, as ROM/RAM, magnetic disc, CD etc., comprise that some instructions are with so that a computer equipment (can be a personal computer, server, the perhaps network equipment etc.) carry out the described method of some part of each embodiment of the present invention or embodiment.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (10)
1. a method that realizes orthogonal optical mark switching technique is characterized in that, comprising:
Net load in the light grouped data gone here and there and change and form three road signals, and after described three road signals are carried out the difference precoding, be respectively loaded on three phase-modulators and carry out phase modulated, generation difference eight phase shift keyed signals;
Header in the light grouped data is loaded on by the amplitude shift key modulation mode on the amplitude of described difference eight phase shift keyed signals, generates difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal;
Send described difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal.
2. method according to claim 1 is characterized in that, described difference eight phase shift keyings of described transmission/amplitude shift keying orthogonal demodulation signal comprises:
Described difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal is carried out power and dispersion compensation.
3. method according to claim 1 is characterized in that, described method comprises after sending described difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal:
Receive described difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal;
With the described difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal that receives, press the power averaging distribution after, carry out difference eight phase shift keyed signal demodulation respectively, and the demodulation of amplitude shift keying signal;
The net load of the described smooth grouped data that demodulates according to difference eight phase shift keyed signals, and the header of the described smooth grouped data that demodulates according to the amplitude shift keying signal reduce described smooth grouped data.
4. method according to claim 3 is characterized in that, described difference eight phase shift keyed signal demodulating processes comprise:
With described difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal through two grade coupled separation after, form four road identical signals of power, described four road signals comprise a two paths of signals and a following two paths of signals;
Described four road signals are carried out phase information/amplitude information conversion, light/electrical signal conversion, and subtraction decision process respectively;
Handle carrying out the logic XOR, form the 3rd primary signal through a described following two paths of signals after the subtraction decision process;
Will be through the described two paths of signals of going up after the subtraction decision process respectively as first primary signal and second primary signal, carry out with described the 3rd primary signal and go here and there conversion, demodulate the net load of described grouped data.
5. a system that realizes orthogonal optical mark switching technique is characterized in that, described system comprises dispensing device and receiving system, and wherein, described dispensing device comprises:
Difference eight phase shift keyed signal generation modules, be used for the net load of light grouped data gone here and there and change and form three road signals, and after described three road signals are carried out the difference precoding, be respectively loaded on three phase-modulators and carry out phase modulated, generate difference eight phase shift keyed signals;
Difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal generation module, be used for the header of light grouped data is loaded on the amplitude of difference eight phase shift keyed signals that described difference eight phase shift keyed signal generation modules generate by the amplitude shift key modulation mode, generate difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal;
Sending module is used to send described difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal.
6. system according to claim 5 is characterized in that receiving system comprises:
Receiver module is used to receive difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal that described sending module sends;
The signal demodulation module is used for difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal that described receiver module is received, press the power averaging distribution after, carry out difference eight phase shift keyed signal demodulation respectively, and the demodulation of amplitude shift keying signal;
Recovery module is used for the net load of the described smooth grouped data that demodulates according to difference eight phase shift keyed signals according to described signal demodulation module, and the header of the described smooth grouped data that demodulates according to the amplitude shift keying signal, reduces described smooth grouped data.
7. system according to claim 6, it is characterized in that, described signal demodulation module comprises signal distribution unit, difference eight phase shift keyed signal demodulating units and amplitude shift keying signal demodulation unit, and wherein, described difference eight phase shift keyed signal demodulating units comprise:
Signal separation unit, be used for described difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal through two grade coupled separation after, form four road identical signals of power, described four road signals comprise a two paths of signals and a following two paths of signals;
Signal processing unit is used for isolated described four road signals of described signal separation unit are carried out phase information/amplitude information conversion, light/electrical signal conversion, and subtraction decision process respectively;
Logic XOR processing unit is used for handling carrying out the logic XOR through a described following two paths of signals after the subtraction decision process, generates the 3rd primary signal;
The net load demodulating unit, being used for will be through the described two paths of signals of going up after the subtraction decision process respectively as first primary signal and second primary signal, the 3rd primary signal that generates with described logic XOR processing unit is carried out and is gone here and there conversion, demodulates the net load of described grouped data.
8. a device of realizing orthogonal optical mark switching technique is characterized in that, described device comprises:
Difference eight phase shift keyed signal generation modules, be used for the net load of light grouped data gone here and there and change and form three road signals, and after described three road signals are carried out the difference precoding, be respectively loaded on three phase-modulators and carry out phase modulated, generate difference eight phase shift keyed signals;
Difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal generation module, be used for the header of light grouped data is loaded on the amplitude of difference eight phase shift keyed signals that described difference eight phase shift keyed signal generation modules generate by the amplitude shift key modulation mode, generate difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal;
Sending module is used to send described difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal.
9. a device of realizing orthogonal optical mark switching technique is characterized in that, described device comprises:
Receiver module is used to receive difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal;
The signal demodulation module is used for difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal that described receiver module is received, press the power averaging distribution after, carry out difference eight phase shift keyed signal demodulation respectively, and the demodulation of amplitude shift keying signal;
Recovery module, the net load that is used for the described smooth grouped data that demodulates according to difference eight phase shift keyed signals according to described signal demodulation module, and the header of the described smooth grouped data that demodulates according to the amplitude shift keying signal of described signal demodulation module, reduce described smooth grouped data.
10. device according to claim 9 is characterized in that, described demodulation module comprises signal distribution unit, difference eight phase shift keyed signal demodulating units and amplitude shift keying signal demodulation unit, and wherein, described difference eight phase shift keyed signal demodulating units comprise:
Signal separation unit, be used for described difference eight phase shift keyings/amplitude shift keying orthogonal demodulation signal through two grade coupled separation after, form four road identical signals of power, described four road signals comprise a two paths of signals and a following two paths of signals;
Signal processing unit is used for isolated described four road signals of described signal separation unit are carried out phase information/amplitude information conversion, light/electrical signal conversion, and subtraction decision process respectively;
Logic XOR processing unit is used for handling carrying out the logic XOR through a described following two paths of signals after the subtraction decision process, generates the 3rd primary signal;
The net load demodulating unit, being used for will be through the described two paths of signals of going up after the subtraction decision process respectively as first primary signal and second primary signal, the 3rd primary signal that generates with described logic XOR processing unit is carried out and is gone here and there conversion, demodulates the net load of described grouped data.
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| CN102035603A (en) * | 2010-12-09 | 2011-04-27 | 北京邮电大学 | Method and device for erasing and interposing D8PSK/ASK orthogonal optical label based on EAM |
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| 《中国优秀硕士学位论文全文数据库 信息科技辑》 20081015 张旭 光调制技术及其在光标记交换网络和ROF系统中的应用 北京邮电大学 I136-304 , 第2008年10期 * |
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| CN102035603A (en) * | 2010-12-09 | 2011-04-27 | 北京邮电大学 | Method and device for erasing and interposing D8PSK/ASK orthogonal optical label based on EAM |
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