CN107623548A - Principal and subordinate's method for transmitting signals in one kind cognition optical-fiber network - Google Patents
Principal and subordinate's method for transmitting signals in one kind cognition optical-fiber network Download PDFInfo
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Abstract
The invention discloses one kind to recognize principal and subordinate's method for transmitting signals in optical-fiber network, by emulating the peak power and peak transfer rate from signal that obtains different OSNR surpluses and can support, for the previous hop node of destination node, estimation is perceived after main signal is received and obtains its OSNR surplus with destination node, power and transmission rate from signal is set, then generate from signal, transmitted together with main signal to destination node, after destination node receives principal and subordinate's signal and signal, first will be from signal as interference, main signal is recovered from signal, then carried out according to the main signal recovered using SIC FFE balanced devices pair and signal balanced, reconvict to obtain from signal.Using the present invention, the upper hop node of destination node can be communicated while main signal is transmitted with destination node, and cognition optical-fiber network transmission capacity is improved from face.
Description
Technical field
The invention belongs to recognize optical-fiber network technical field, more specifically, it is related to principal and subordinate in a kind of cognition optical-fiber network and believes
Number transmission method.
Background technology
With driving for communication bandwidth, intellectuality and digitization, optical-fiber network is presented by low speed to high speed, by manually to intelligence
Can, by the trend of photoelectric conversion to all-optical network.The advantage of all-optical network is solve the problem that light electro-optic conversion runs into, tool
Have that Large Copacity is transparent, the inherent advantage of transmission and low energy consumption, and lack the important bottleneck that flexibility is optical-fiber network current development.
Fig. 1 is all-optical network schematic diagram.As shown in figure 1, in all-optical network, optical signal within network nodes by route and
Forwarding, as the distance of optical link transmission and the node number of forwarding are different, the different transmission performance of optical signal presentation, and this
Greatly add the complexity of optical network management.Rapid growth and type of service recently as business datum amount it is dynamic
State is changeable, particularly the rise of data center network and cloud business, and optical-fiber network is also faced with dynamic, flexible an urgent demand.
Cognition optical-fiber network is to solve the intelligence that optical-fiber network can not adapt to dynamic optical network environment this problem and be proposed
Network.Cognition optical-fiber network can independently detect current dynamic optical network environment, while be made accordingly for current network environment
Decision-making and action, realize the dynamic optimization to network and reconstruct, and then lift the service quality and transmission quality of optical-fiber network.Recognize
Know that optical-fiber network realizes the control and monitoring to all nodes by a control plane.Although control plane can be from past observation
Optimize and adjust with unification of the realization in study to whole cognition optical network resource, but for larger optical-fiber network (such as
Backbone network etc.) for, this can greatly increase the business burden and computation complexity of control plane.Based on Node distribution formula perceive and
The cognition optical-fiber network controlled brings new method to solve this problem.
In optical fiber transmitting procedure, the transmission quality of optical signal can constantly be deteriorated with the reduction of optical signal power.
In modern optical fiber telecommunications system, in order to realize low cost, long-distance transmissions, EDFA Erbium-Doped Fiber Amplifier can be used in fiber link
(EDFA) amplification of optical signal is realized.But the use of image intensifer, can introduce noise of optical amplifier, while image intensifer is made an uproar
Sound can constantly be accumulated, so as to influence the performance of the quality of transmission signal and system.Due to OSNR (Optical
Signal-to-Noise Ratio, OSNR) it is directly related with the signal transmission error rates of system, it can intuitively reflect transmission
The change of the signal power and noise power of optical signal, therefore optical signal OSNR monitoring is just into assessment optical signal transmission quality
With one important technical of systematic function.In order to ensure that the transmission error rates of system reach requirement, corresponding OSNR is also necessary
Reach corresponding threshold requirement.
OSNR monitoring and method of estimation, including the linear interpolation based on spectrometer realize the interior OSNR of band to optical signal
Estimation etc..In traditional optical-fiber network, by receiving terminal by the processing to receiving optical signal, the OSNR to a certain optical link is realized
It is monitored and estimates.Then, the OSNR estimates of this optical link are fed back to transmitting terminal by receiving terminal, by transmitting terminal foundation
OSNR estimate makes appropriate adjustment to the transmission power of optical signal or modulation format etc..But OSNR feedback is when needing
Between, therefore the regulation to optical-fiber network has certain timeliness requirement.Meanwhile in optical-fiber network, each optical link is to be mutually related,
While luminous power to wherein one optical link etc. adjusts, other optical links can also be impacted, this is greatly increased
The complexity of network management.
In practice, the real-time change of optical network environment causes the receiving terminal OSNR in optical link to be trembled near some value
It is dynamic.Therefore, in order to ensure optical link can normal work, emitter properly increases the transmission power of optical signal to increase OSNR,
Difference between actual OSNR and OSNR threshold values is referred to as OSNR surpluses.Obviously, OSNR surpluses are more, what the optical link can be tolerated
OSNR shakes are bigger, and system work is more stable.But say to a certain extent, the generation of OSNR surpluses can be brought leads to a certain degree
Believe the waste of resource, how to be the problem of being currently needed for research using OSNR surpluses.
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide one kind to recognize principal and subordinate's signal transmission side in optical-fiber network
Method, in main signal transmitting procedure, the upper hop node of destination node is sent from signal and mesh accordingly by perceiving OSNR surpluses
Node communication, improve cognition optical-fiber network transmission capacity.
For achieving the above object, principal and subordinate's method for transmitting signals comprises the following steps in present invention cognition optical-fiber network：
S1：By emulating peak power and the maximum transmitted speed from signal that obtains different OSNR surpluses and can support
Rate；
S2：When destination node N previous node during node M is as some signal transmission path, signal is being received
Afterwards, if the node M needs and destination node N is communicated, using the signal received as main signal, then to main signal
OSNR in node M is perceived, and the OSNR surpluses between current OSNR and OSNR threshold values are calculated, are imitated according to step S1
The peak power and peak transfer rate from signal that the different OSNR surpluses really obtained can be supported, set the power from signal
And transmission rate；
S3：Node M according to step S2 set from signal power and transmission rate, generate from signal, together with main signal one
Rise and transmit to destination node N；
S4：After destination node N receives principal and subordinate's signal and signal, main signal is recovered and from letter using following methods
Number：
S4.1：Destination node N carries out relevant detection to the optical signal received, by the reception signal R (t) after relevant detection
Numeric field is transformed into, obtains the data signal R (n) of reception signal；
S4.2：Equilibrium is carried out using FFE to signal R (n), balanced expression formula is：
Wherein, Rm[p] represents the sampled value of moment p in equalizing signal of the reception signal through FFE, and L represents FFE wave filter
Length, R [p-l] represent reception signal data signal in moment p-l sampled value, clRepresent FFE tap coefficient；
To the equalizing signal R of FFE outputsm[p] makes decisions, and recovery obtains main signal Sm[p]；
S4.3：Equilibrium is carried out using SIC-FFE balanced devices to signal R (n), balanced expression formula is：
Wherein, Ri[p] represents the sampled value of moment p in the equalizing signal that reception signal obtains through SIC-FFE balanced devices, K
Represent the filter length of FFE in SIC-FFE balanced devices, R [p-k] represents that moment p-k is adopted in the data signal of reception signal
Sample value, fkThe tap coefficient of FFE in SIC-FFE balanced devices is represented, Q represents the filter length of SIC in SIC-FFE balanced devices, Sm
Moment q+p sampled value, g in the main signal that [q+p] expression recoversqRepresent the tap coefficient of SIC in SIC-FFE balanced devices；
To the equalizing signal R of SIC-FFE balanced devices outputi[p] is made decisions, and recovery is obtained from signal Si[p]。
Principal and subordinate's method for transmitting signals in present invention cognition optical-fiber network, it can be supported by emulating the different OSNR surpluses of acquisition
The peak power and peak transfer rate from signal, for the previous hop node of destination node, feel after main signal is received
Know that estimation obtains its OSNR surplus with destination node, the power and transmission rate from signal is set, then generate from signal, connect
Transmit with main signal to destination node, after destination node receives principal and subordinate's signal and signal, will make first from signal together
For interference, main signal is recovered from signal, SIC-FFE balanced devices pair and signal are then used according to the main signal recovered
Equilibrium is carried out, reconvicts to obtain from signal.Using the present invention, the upper hop node of destination node can be in the same of transmission main signal
When communicated with destination node, from face improve cognition optical-fiber network transmission capacity.
Brief description of the drawings
Fig. 1 is all-optical network schematic diagram；
Fig. 2 is principal and subordinate's signal transmission schematic diagram in present invention cognition optical-fiber network；
Fig. 3 is the embodiment flow chart of principal and subordinate's method for transmitting signals in present invention cognition optical-fiber network；
Fig. 4 is that principal and subordinate's signal recovers schematic diagram in the present invention；
Fig. 5 is different from signal power and fixed from the error performance that signal transmission rate is main signal in the case of 2Gbaud
Curve map；
Fig. 6 is the fixed error performance curve map from main signal in the case of signal power and different transmission rates；
Fig. 7 is the error performance curve map from signal for having under different OSNR surpluses different transmission rates；
Fig. 8 is the peak power curve map that QPSK corresponding to different OSNR surpluses can be set from signal；
Fig. 9 is the peak transfer rate curve that QPSK corresponding to different OSNR surpluses can be set from signal under the HD-FEC limit
Figure；
Figure 10 is using principal and subordinate's transport stream signal journey figure during QPSK modulation from signal；
Figure 11 is the structural representation of FFE in embodiment 1；
Figure 12 is the structural representation of maximum likelihood decision device in embodiment 1；
Figure 13 is the structural representation of SIC-FFE balanced devices in embodiment 1；
Figure 14 is the peak power curve map that OOK corresponding to different OSNR surpluses can be set from signal；
Figure 15 is the peak transfer rate curve that OOK corresponding to different OSNR surpluses can be set from signal under the HD-FEC limit
Figure；
Figure 16 is using principal and subordinate's transport stream signal journey figure during OOK modulation from signal；
Figure 17 be in embodiment 2 OOK from the amplitude detector schematic diagram of signal.
Embodiment
The embodiment of the present invention is described below in conjunction with the accompanying drawings, so as to those skilled in the art preferably
Understand the present invention.Requiring particular attention is that in the following description, when known function and the detailed description of design perhaps
When can desalinate the main contents of the present invention, these descriptions will be ignored herein.
In order to which technical scheme is better described, the technical thought of the present invention is briefly described first.Fig. 2
It is principal and subordinate's signal transmission schematic diagram in present invention cognition optical-fiber network.As shown in Fig. 2 in all-optical network, optical signals source node A
Onto destination node N path, it can be route and be forwarded by multiple intermediate nodes.The optical signal of note transmission is Sm(t), wherein t tables
Show the time, be defined as main signal.Transmitted for the long range with multiple image intensifers, the OSNR of light path is by all amplifications
The noise of device accumulation is determined, and destination node N upper hop node (i.e. penultimate node M) can be generally obtained on master
The accurate OSNR estimations of signal.Estimated based on its OSNR, node M judges whether also have sufficient OSNR surpluses on this link of MN
Come transmit low-power from signal Si(t).When principal and subordinate's signal on MN this link simultaneous transmission, then node N will receive
Two signals and signal, node N separated and detected recovery by main signal and from signal using certain method, you can realize
The transmission from signal is carried out while main signal is transmitted, so as to improve transmission capacity.
Fig. 3 is the embodiment flow chart of principal and subordinate's method for transmitting signals in present invention cognition optical-fiber network.Such as Fig. 3 institutes
Show, present invention cognition optical-fiber network principal and subordinate's method for transmitting signals comprises the following steps：
S301：Emulation is obtained corresponding to different OSNR surpluses from signal parameter：
For the detection of main signal, if the power from signal is higher, the interference from signal to main signal is stronger, main
The detection performance of signal is poorer；If lower from the power of signal, the interference from signal to main signal is weaker, the detection of main signal
Performance is better.Therefore, it should to being controlled from the power of signal, so as to successfully detect main signal under limited interference.Therefore,
It is one of most important parameters of the present invention from the power of signal.
For the detection from signal, from Principle of Communication, the bit error rate (Bit Error Rate, BER) of signal
Performance is determined by the ratio of symbol energy and noise power spectral density.Due to there is the power lower than main signal, institute from signal
So that symbol duration must be increased to lift symbol energy by reducing its transmission rate.Under acceptable power, from
The maximum allowable transmission rate of signal is another important parameter of the present invention.
It can be seen that in order to realize that principal and subordinate's signal transmits, it is thus necessary to determine that from the power and transmission rate of signal.The present invention passes through imitative
Really obtain the peak power and peak transfer rate from signal that different OSNR surpluses can be supported.Principal and subordinate's signal passes during emulation
The defeated singal reporting code for needing to meet can be set according to being actually needed.
S302：Set from signal parameter：
When destination node N previous node during node M is as some signal transmission path, upon receipt of the signals,
If the node M is needed and destination node N is communicated, using the signal received as main signal, then main signal is existed
The OSNR of link is perceived between node M and destination node N, is calculated more than the OSNR between current OSNR and OSNR threshold values
Amount, peak power and the maximum transmitted speed from signal that can be supported according to the step S301 different OSNR surpluses for emulating to obtain
Rate, the power and transmission rate from signal is set.
S303：Generation is from signal and transmits principal and subordinate's signal：
Node M according to step S302 set from signal power and transmission rate, generate from signal, together with main signal
Transmit to destination node N.It can be seen that for destination node N, by receive two signals and signal.
S304：Principal and subordinate's signal recovers：
After destination node N receives principal and subordinate's signal and signal, it is necessary to by processing receive and signal, point
From with recover main signal and from signal, and make them that there is error performance good enough.Therefore, principal and subordinate's signal of receiving terminal is extensive
It is multiple, it is the key for realizing the transmission of principal and subordinate's signal.Fig. 4 is that principal and subordinate's signal recovers schematic diagram in the present invention.It is as shown in figure 4, of the invention
Middle principal and subordinate's signal recovers that following steps can be divided into：
S401：It is converted to data signal：
Destination node N carries out relevant detection to the optical signal received, and by the reception signal R (t) after relevant detection and
Conventional signal transmission is the same, and numeral is transformed into by analog-digital converter (Analog-to-Digital Conversion, ADC)
Domain, obtains the data signal R (n) of reception signal, and wherein n represents the moment.
S402：Main signal is recovered：
In order to recover main signal, low-power is considered as a kind of interference similar to noise from signal, uses routine
Feed-forward balanced device (Forward Feedback Equalizer, FFE) carries out equilibrium to signal R (n), for optical channel
Dispersion compensation.FFE function can adopt be formulated it is as follows：
Wherein, Rm[p] represents the sampled value of moment p in equalizing signal of the reception signal through FFE, and L represents FFE wave filter
Length, R [p-l] represent reception signal data signal in moment p-l sampled value, clFFE tap coefficient is represented, can be passed through
The alternative manner of least mean-square error obtains.
To the equalizing signal R of FFE outputsm[p] makes decisions, and recovery obtains main signal Sm[p]。
S403：Recover from signal：
For from signaling protein14-3-3, the present invention proposes a kind of serial interference elimination (Successive Interference
Cancellation, SIC) method.The main signal recovered according to step S402, to eliminate it to the interference from signal, from letter
Recovered in number R (n) from signal.It is less than hard-decision forward error correction (Hard-Decision in the bit error rate of main signal
Forward-Error-Correction, HD-FEC) limit 3.8x10-3Under conditions of, SIC error propagation problem can neglect
Slightly disregard.It is as follows to the dispersion compensation from signal, present invention proposition SIC-FFE balanced devices, its expression formula in order to realize simultaneously：
Wherein, Ri[p] represents the sampled value of moment p in the equalizing signal that reception signal obtains through SIC-FFE balanced devices,For realizing that conventional FFE, K represent the filter length of FFE in SIC-FFE balanced devices, R [p-k] table
Show the sampled value of moment p-k in the data signal of reception signal, fkRepresent the tap coefficient of FFE in SIC-FFE balanced devices.For realizing SIC, Q represents the filter length of SIC in SIC-FFE balanced devices, in order to eliminate main letter
Number should be sufficiently large to the interference from signal, Q, SmMoment q+p sampled value, g in the main signal that [q+p] expression recoversqRepresent
SIC tap coefficient in SIC-FFE balanced devices.fkAnd gqThe iteration that can be transferred through conventional least-mean-square error algorithm obtains.
To the equalizing signal R of SIC-FFE balanced devices outputi[p] is made decisions, and recovery is obtained from signal Si[p]
Hereinafter technical scheme is illustrated using two embodiments.
Embodiment 1
In the present embodiment, main signal Sm(t) be the conventional 28GBaud of fiber optic communication QPSK (Quadrature Phase
Shift Keyin, QPSK) modulated signal, signal power is arranged to 1mW, from signal Si(t) modulation system is selected
QPSK is modulated.
Fig. 5 is different from signal power and fixed from the error performance that signal transmission rate is main signal in the case of 2Gbaud
Curve map.As shown in figure 5, it can be deteriorated from signal power, the BER performances of main signal for higher.For example, not from signal
In the case of power, main signal can be issued to 10 in 14dB OSNR-3BER requirements.If find 2dB's in main signal
OSNR surpluses, under acceptable BER performances, main signal can be up to together being transmitted from signal for 0.056mW with power.Figure
6 be the fixed error performance curve map from main signal in the case of signal power and different transmission rates.As shown in fig. 6, in fixation
Under signal power, the BER performances of main signal are unrelated with the transmission rate from signal.That is, can be with from the power of signal
Set based on OSNR surpluses, and it is unrelated with the transmission rate from signal.
Assuming that main signal has 2dB OSNR surpluses, then 0.05mW is could be arranged to from signal power, to the property from signal
It can be emulated.Fig. 7 is the error performance curve map from signal for having under different OSNR surpluses different transmission rates.Such as Fig. 7
It is shown, in order to meet the HD-FEC limit from signal, with the help of the SIC-FFE of receiver, OSNR surpluses be respectively 2dB,
From the peak transfer rate of signal it is respectively 2.8GBaud, 4GBaud and 5.4GBaud during 2.5dB and 3dB.It can be seen that from signal
It can also be set up to transmission rate based on OSNR surpluses.
Emulation obtains the peak power and peak transfer rate from signal that different OSNR surpluses can be supported first.Figure
8 be the peak power curve map that QPSK corresponding to different OSNR surpluses can be set from signal.Fig. 9 is different under the HD-FEC limit
The peak transfer rate curve map that QPSK corresponding to OSNR surpluses can be set from signal.
Figure 10 is using principal and subordinate's transport stream signal journey figure during QPSK modulation from signal.As shown in Figure 10, from the generation of signal
Method is：
1) node M perceives estimation and obtains OSNR surpluses, is then suitable from signal behavior according to OSNR surpluses estimate
Power and transmission rate.
2) QPSK of numeric field is after digital signal processor (Digital Signal Processing, DSP) processing
The suitable signal of speed is produced, the speed of the signal can be controlled by DSP.
3) QPSK area of light is produced based on MZM (Mach-Zehnder modulator, MZ Mach-Zehnder) modulator
From signal.
4) based on the power allowed from signal, to variable optical attenuator (the Variable Optical of transmitting terminal
Attenuator, VOA) it is controlled, realize effective adjustment from output power signal.
5) it is coupled into from signal by a photo-coupler in optical fiber, realizes the common transport with main signal.This implementation
Principal and subordinate's signal coupling ratio of photo-coupler is arranged to 9 in example:1, then after optical coupling, the damage to main signal is negligible not
Meter.
It is as follows in destination node N, the method for reseptance of principal and subordinate's signal：
1) the reception signal R (t) of principal and subordinate's signal is changed into by digital received signals by a light coherent detector and ADC
R(n)。
2) using the dispersion in feed-forward balanced device (FFE) compensated optical fiber channel, realize main signal equilibrium and
Detection.Figure 11 is the structural representation of FFE in embodiment 1.As shown in figure 11, FFE is linear transverse wave filter in the present embodiment,
Wherein Z-1Represent time delay device.From the calculating of FFE formula, either equalizer output signal, or tap coefficient repeatedly
In generation, calculates, and is all to be completed by the multiplication of plural number and add operation, the operation can be completed by DSP module.
3) in the present embodiment, to FFE output equalizing signal use based on maximum likelihood (Maximum Likelihood,
ML method) makes decisions.Because main signal is modulated using QPSK in the present embodiment, four points in its planisphere are respectively 1+
I, 1-i, -1+i, -1-i.Figure 12 is the structural representation of maximum likelihood decision device in embodiment 1.As shown in figure 12, the maximum is seemingly
Right decision device includes 4 complex adders, 4 multipliers and comparator, and the output of comparator is the star of corresponding minimum range
Seat point value.
4) next to being detected from signal.Figure 13 is the structural representation of SIC-FFE balanced devices in embodiment 1.Such as
Shown in Figure 13, in the present embodiment SIC-FFE balanced devices by two linear transverse wave filter groups into, be respectively intended to carry out SIC and
FFE, its balanced with main signal similar with detection, either calculating of equalizer output signal, or tap coefficient of specific implementation
Iterative calculation, be all to be completed by the multiplication of plural number and add operation, the operation can complete by DSP module.
5) it is similar with the judgement of main signal, for QPSK modulation from signal, the output to its SIC-FFE, using based on
The method of maximum likelihood makes decisions, and recovers from signal Si[p]。
Embodiment 2
In actual applications, in order to cost-effective, transmitter and receiver can be simplified., can be with for from signal side
Using more simple OOK (On-Off Keying, binary system on off keying) modulation.Similarly, emulation acquisition first is different
The peak power and peak transfer rate from signal that OSNR surpluses can be supported.Figure 14 is OOK corresponding to different OSNR surpluses
The peak power curve map that can be set from signal.Figure 15 is that OOK corresponding to different OSNR surpluses can from signal under the HD-FEC limit
The peak transfer rate curve map of setting.
Figure 16 is using principal and subordinate's transport stream signal journey figure during OOK modulation from signal.As shown in figure 16, modulated from signal OOK
Realization, without using MZM modulator, but can be with the lower direct modulation laser (Direct of use cost
Modulation Laser, DML).
In receiving terminal, the restoration methods of main signal are same as Example 1, will not be repeated here.For OOK from the extensive of signal
Multiple, its SIC-FFE equilibrium is also same as Example 1.OOK is slightly different from the detection of signal with QPSK from the detection of signal.
Figure 17 be in embodiment 2 OOK from the amplitude detector schematic diagram of signal.As shown in figure 17, amplitude detections of the OOK from signal
In (Amplitude Detection, AD) device, maximum likelihood decision device can be reduced to a threshold comparator, first to equal
The output result of weighing apparatus carries out computing module-square, then compared with threshold value (being usually 0.25), then adjudicates as 0, is more than less than threshold value
Threshold value is then adjudicated as 1, so as to recover to obtain OOK from signal.
Although the illustrative embodiment of the present invention is described above, in order to the technology of the art
Personnel understand the present invention, it should be apparent that the invention is not restricted to the scope of embodiment, to the common skill of the art
For art personnel, if various change in the spirit and scope of the present invention that appended claim limits and determines, these
Change is it will be apparent that all utilize the innovation and creation of present inventive concept in the row of protection.
Claims (1)
1. one kind cognition optical-fiber network principal and subordinate's method for transmitting signals, it is characterised in that comprise the following steps：
S1：By emulating the peak power and peak transfer rate from signal that obtains different OSNR surpluses and can support；
S2：When destination node N previous node during node M is as some signal transmission path, upon receipt of the signals, such as
The fruit node M needs and destination node N is communicated, then using the signal received as main signal, then main signal is being saved
Point M OSNR is perceived, and the OSNR surpluses between current OSNR values and OSNR threshold values are calculated, are emulated according to step S1
To the peak power and peak transfer rate from signal that can support of different OSNR surpluses, the power and biography from signal are set
Defeated speed；
S3：Node M according to step S2 set from signal power and transmission rate, generate from signal, passed together with main signal
Transport to destination node N；
S4：After destination node N receives principal and subordinate's signal and signal, main signal is recovered and from signal using following methods：
S4.1：Destination node N carries out relevant detection to the optical signal received, and the reception signal R (t) after relevant detection is changed
To numeric field, the data signal R (n) of reception signal is obtained；
S4.2：Equilibrium is carried out using FFE to signal R (n), balanced expression formula is：
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Wherein, Rm[p] represents the sampled value of moment p in equalizing signal of the reception signal through FFE, and L represents FFE filter length,
Moment p-l sampled value, c in the data signal of R [p-l] expression reception signalslRepresent FFE tap coefficient；
To the equalizing signal R of FFE outputsm[p] makes decisions, and recovery obtains main signal Sm[p]；
S4.3：Equilibrium is carried out using SIC-FFE balanced devices to signal R (n), balanced expression formula is：
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Wherein, Ri[p] represents the sampled value of moment p in the equalizing signal that reception signal obtains through SIC-FFE balanced devices, and K is represented
FFE filter length in SIC-FFE balanced devices, R [p-k] represent reception signal data signal in moment p-k sampled value,
fkThe tap coefficient of FFE in SIC-FFE balanced devices is represented, Q represents the filter length of SIC in SIC-FFE balanced devices, Sm[q+p]
Moment q+p sampled value, g in the main signal that expression recoversqRepresent the tap coefficient of SIC in SIC-FFE balanced devices；
To the equalizing signal R of SIC-FFE balanced devices outputi[p] is made decisions, and recovery is obtained from signal Sm[p]。
Priority Applications (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109525320A (en) * | 2019-01-04 | 2019-03-26 | 电子科技大学 | A kind of full optic relay device based on regeneration Raman technology |
| CN111934783A (en) * | 2020-07-29 | 2020-11-13 | 电子科技大学 | Optical comb system master-slave phase estimation performance improving method based on time delay module |
| WO2021114402A1 (en) * | 2019-12-13 | 2021-06-17 | 苏州大学 | Method and system for preventing failure in artificial intelligence-based transmission quality prediction |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140223265A1 (en) * | 2012-05-07 | 2014-08-07 | Kent Lusted | Network system configured for resolving forward error correction during a link training sequence |
| US20150249558A1 (en) * | 2012-09-29 | 2015-09-03 | Manuel A. Aguilar-Arreola | Requalization effort-balancing of transmit finite impulse response and receive linear equalizer or receive decision feedback equalizer structures in high-speed serial interconnects |
| CN105684333A (en) * | 2013-08-01 | 2016-06-15 | 瑞典爱立信有限公司 | Parameter control for optical multicarrier signal |
-
2017
- 2017-10-16 CN CN201710959557.1A patent/CN107623548B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140223265A1 (en) * | 2012-05-07 | 2014-08-07 | Kent Lusted | Network system configured for resolving forward error correction during a link training sequence |
| US20150249558A1 (en) * | 2012-09-29 | 2015-09-03 | Manuel A. Aguilar-Arreola | Requalization effort-balancing of transmit finite impulse response and receive linear equalizer or receive decision feedback equalizer structures in high-speed serial interconnects |
| CN105684333A (en) * | 2013-08-01 | 2016-06-15 | 瑞典爱立信有限公司 | Parameter control for optical multicarrier signal |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109525320A (en) * | 2019-01-04 | 2019-03-26 | 电子科技大学 | A kind of full optic relay device based on regeneration Raman technology |
| WO2021114402A1 (en) * | 2019-12-13 | 2021-06-17 | 苏州大学 | Method and system for preventing failure in artificial intelligence-based transmission quality prediction |
| US11469817B2 (en) | 2019-12-13 | 2022-10-11 | Soochow University | Protection method and system against failure of AI-based QoT prediction |
| CN111934783A (en) * | 2020-07-29 | 2020-11-13 | 电子科技大学 | Optical comb system master-slave phase estimation performance improving method based on time delay module |
| CN111934783B (en) * | 2020-07-29 | 2021-07-13 | 电子科技大学 | Optical comb system master-slave phase estimation performance improving method based on time delay module |
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