CN110072161A - A kind of signal processing method and device - Google Patents
A kind of signal processing method and device Download PDFInfo
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- CN110072161A CN110072161A CN201810067078.3A CN201810067078A CN110072161A CN 110072161 A CN110072161 A CN 110072161A CN 201810067078 A CN201810067078 A CN 201810067078A CN 110072161 A CN110072161 A CN 110072161A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
- H04J14/0228—Wavelength allocation for communications one-to-all, e.g. broadcasting wavelengths
- H04J14/023—Wavelength allocation for communications one-to-all, e.g. broadcasting wavelengths in WDM passive optical networks [WDM-PON]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0005—Switch and router aspects
- H04Q2011/0037—Operation
- H04Q2011/0049—Crosstalk reduction; Noise; Power budget
Abstract
The invention discloses a kind of signal processing method and devices, comprising: is filtered to received superposed signal, obtains Added Management control channel (AMCC) signal by the first passive optical-fiber network (PON) signal interference；Wherein, received superposed signal is the signal that the first AMCC signal and the first PON Signal averaging are formed；Using the AMCC signal of acquisition as the 2nd AMCC signal, and the addition interference that the first PON signal generates is eliminated to the 2nd AMCC signal, obtains the AMCC signal after addition interference is eliminated.From the embodiment of the present invention, due to the addition interference for being eliminated PON signal by the AMCC signal of PON signal interference obtained from superposed signal, obtain the AMCC signal after addition interference is eliminated, to eliminate the interference of PON signal to a certain extent to the AMCC signal extracted from superposed signal, the bit error rate is reduced.
Description
Technical field
The present embodiments relate to field of communication technology, espespecially a kind of signal processing method and device.
Background technique
In (the Next-Generation Passive Optical Network 2, NG- of next-generation passive optical network 2
PON2) point-to-point Wavelength division multiplexing-passive fiber optic network (Point to Point Wavelength Division in standard
MultiplexingPassive Optical Network, PtP WDM PON) this part needs to control using Added Management
Channel (Assistant Management Control Channel, AMCC) signal comes transmission wavelength distribution, dynamic bandwidth point
Match and operation and maintenance management (Operation Administration and Maintenance, OAM) information.
There is limitations in actual transmissions for AMCC signal, and being embodied in AMCC signal cannot function as passive optical-fiber network
A part of (Passive Optical Network, PON) signal is transmitted, but by the overlapped frequency corresponding to PON signal
It is sent in the low frequency part of band, and due to the overlapping of frequency domain, it will receive in the AMCC signal that receiving end extracts
The larger interference of PON signal, to generate the biggish bit error rate.
However, lacking corresponding technological means in the related technology eliminates the interference that PON signal generates.
Summary of the invention
In order to solve the above-mentioned technical problem, the embodiment of the invention provides a kind of signal processing method and device, Neng Gou
The interference for eliminating PON signal to a certain extent, to reduce the bit error rate of AMCC signal.
In order to reach the object of the invention, the embodiment of the invention provides a kind of signal processing methods, comprising:
Received superposed signal is filtered, the AMCC signal by the first PON signal interference is obtained；Wherein, described
Received superposed signal is the signal that the first AMCC signal and the first PON Signal averaging are formed；
Using the AMCC signal of acquisition as the 2nd AMCC signal, and the first PON signal is eliminated to the 2nd AMCC signal
The addition interference of generation obtains the AMCC signal after addition interference is eliminated.
The embodiment of the invention also provides a kind of signal processing apparatus, comprising:
Preprocessing module obtains the AMCC by the first PON signal interference for being filtered to received superposed signal
Signal；Wherein, the received superposed signal is the signal that the first AMCC signal and the first PON Signal averaging are formed；
First processing module, the AMCC signal for that will obtain are believed as the 2nd AMCC signal, and to the 2nd AMCC
Number eliminate the first PON signal generate addition interference, obtain addition interference eliminate after AMCC signal.
Compared with prior art, due to being eliminated to the AMCC signal by PON signal interference obtained from superposed signal
The addition interference of PON signal obtains the AMCC signal after addition interference is eliminated, thus to extracting from superposed signal
AMCC signal eliminates the interference of PON signal to a certain extent, reduces the bit error rate.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention can be by specification, right
Specifically noted structure is achieved and obtained in claim and attached drawing.
Detailed description of the invention
Attached drawing is used to provide to further understand technical solution of the present invention, and constitutes part of specification, with this
The embodiment of application technical solution for explaining the present invention together, does not constitute the limitation to technical solution of the present invention.
Fig. 1 is a kind of flow diagram of signal processing method provided in an embodiment of the present invention；
Fig. 2 is the flow diagram of another signal processing method provided in an embodiment of the present invention；
Fig. 3 is the flow diagram of another signal processing method provided in an embodiment of the present invention；
Fig. 4 is the flow diagram of the processing of AMCC signal provided in an embodiment of the present invention；
Fig. 5 is the flow diagram that AMCC signal interference module provided in an embodiment of the present invention carries out interference elimination；
Fig. 6 is the flow diagram that the extraction of AMCC signal provided in an embodiment of the present invention is eliminated with interference；
Fig. 7 is the flow diagram of interference cancellation algorithm provided in an embodiment of the present invention；
Fig. 8 is a kind of structural schematic diagram of signal processing apparatus provided in an embodiment of the present invention；
Fig. 9 is the structural schematic diagram of another signal processing apparatus provided in an embodiment of the present invention；
Figure 10 is the structural schematic diagram of another signal processing apparatus provided in an embodiment of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention
Embodiment be described in detail.It should be noted that in the absence of conflict, in the embodiment and embodiment in the application
Feature can mutual any combination.
Step shown in the flowchart of the accompanying drawings can be in a computer system such as a set of computer executable instructions
It executes.Also, although logical order is shown in flow charts, and it in some cases, can be to be different from herein suitable
Sequence executes shown or described step.
Before illustrating signal processing method provided in an embodiment of the present invention, first some prior arts are illustrated: being examined
The extraction for considering AMCC signal can adjust AMCC signal with PON signal in transmitting terminal using the relationship for being equivalent to be multiplied
It makes and sends, the stacked system of this AMCC signal and PON signal can increase the opening amplitude of transmitting signal eye pattern, thus
Receiving end is received AMCC signal more correctly.By taking on-off keying (On-Off Keying, OOK) baseband modulation as an example, it is assumed that
The AMCC signal of transmission is sAMCC(by the signal after PON signal and AMCC signal rate ratio multiple up-sampling, value is 0 He
1), the PON signal of transmission is sPON(value is 1 when high level, and value is some positive value close to 0 when low level, this is just
Value depends on the extinction ratio of laser), AAModulation amplitude when " 1 ", A are sent out for AMCC signalPModulation when " 1 " is sent out for PON signal
Amplitude, then signal (superposed signal sent) of equal value such as formula (1) is shown after being superimposed:
S=(AAsAMCC+AP)·sPON (1)
Superimposed signal is sent by laser modulation at optical signal, in receiving end, utilizes avalanche diode
(Avalanche Photo Diode, APD) detects optical signal, is transformed into electric signal, according to shining for laser
The blocking that characteristic gets rid of transimpedance amplifier (Trans Impendance Amplifier, TIA) influences, and ignores in optical fiber
Effect of dispersion, wherein k is attenuation coefficient, and n is white noise, shown in the received superposed signal of institute such as formula (2):
R=ks+n=k (AAsAMCC+AP)·sPON+n (2)
If the signal that hard decision obtains directly is carried out to the AMCC signal obtained according to formula (2) at this time, it will obtain
By the AMCC signal of hard decision, but the signal is the AMCC signal eliminated without interference (interference of PON signal), with 10-4's
The bit error rate is standard, and the maximum occupied bandwidth of the AMCC signal of superposition is only several hundred kHz or so, if increasing AMCC signal again
Occupied bandwidth, the bit error rate will increase considerably, so that AMCC signal more can not be correctly received
The embodiment of the present invention provides a kind of signal processing method, as shown in Figure 1, this method comprises:
Step 101 is filtered received superposed signal, obtains the AMCC signal by the first PON signal interference.
Wherein, received superposed signal is the signal that the first AMCC signal and the first PON Signal averaging are formed.
Step 102, using the AMCC signal of acquisition as the 2nd AMCC signal, and to the 2nd AMCC signal eliminate the first PON
The addition interference that signal generates obtains the AMCC signal after addition interference is eliminated.
It should be noted that the processing mode of signal processing method provided in an embodiment of the present invention is at off-line digital signal
(Digital Signal Processing, the DSP) mode of managing or analog circuit mode, the invention is not limited in this regard.
Signal processing method provided in an embodiment of the present invention is filtered received superposed signal, obtains by first
The AMCC signal of PON signal interference；Wherein, received superposed signal is that the first AMCC signal and the first PON Signal averaging are formed
Signal；Using the AMCC signal of acquisition as the 2nd AMCC signal, and what the first PON signal generated is eliminated to the 2nd AMCC signal
Addition interference obtains the AMCC signal after addition interference is eliminated.From the embodiment of the present invention as it can be seen that due to being obtained to from superposed signal
The AMCC signal by PON signal interference taken eliminates the addition interference of PON signal, obtains the AMCC letter after addition interference is eliminated
Number, to eliminate the interference of PON signal to a certain extent to the AMCC signal extracted from superposed signal, reduce
The bit error rate.
Optionally, in the corresponding embodiment of Fig. 1, being filtered to received superposed signal includes: to received superposition
Signal is filtered using preset low-pass filter.The addition interference that first PON signal generates is eliminated to the 2nd AMCC signal, is obtained
AMCC signal after eliminating to addition interference can be realized by step 102a~102d:
Step 102a, the ratio of the power of the power of received superposed signal and the superposed signal of transmission is calculated, and will be obtained
The ratio obtained is as the first power ratio.
It should be noted that the bandwidth of preset low-pass filter is same or similar with the occupied bandwidth of AMCC signal
Bandwidth is filtered received superposed signal using preset low-pass filter, obtains AMCC signal.
Specifically, the first power ratio can be expressed as k.
Step 102b, the product of modulation amplitude, obtains first when calculating the first power ratio and the first PON signal hair " 1 "
The high value of PON signal, and using obtained level value as the first level value.
Specifically, modulation amplitude can be expressed as A when the first PON signal hair " 1 "P, therefore the high level of the first PON signal
Being worth (i.e. the first level value) is kAP。
Specifically, kA herePThe acquisition of estimated value can be realized by two schemes.A kind of scheme is to calculate separately to connect
The power of the superposed signal of the power and transmission of the superposed signal of receipts, according to the power of the superposed signal of transmission come approximate calculation
AP, k is determined by parameters such as link attenuations, and this method is not required to introduce the external equipments such as any measuring instrument, because sending superposition
The power of signal in transmitting terminal be it is determining, the conversion of electrical power to optical power is determined by laser, therefore by calculating link
Decaying (optical fiber attenuation, attenuator decaying) can be obtained by received optical signal power, then pass through photodiode (Photo-
Diode, PD) the corresponding power that can be obtained by received superposed signal of relevant parameter, to further obtain kAPEstimation
Value.Another scheme is to carry out off-line digital signal processing (Digital Signal Processing, DSP) in receiving end, is led to
It crosses the instruments such as digital signal analyser directly to measure the high value for the PON signal for receiving electric signal, this method obtains
Level value it is relatively accurate and do not have to the power for considering to send electric signal, but need corresponding measuring instrument.
Step 102c, the first PON signal is rebuild according to the first level value, and obtained PON signal is believed as the 2nd PON
Number.
It should be noted that rebuilding the obtained PON signal of the first PON signal according to the first level value, (i.e. the 2nd PON believes
Number) only similar to the first PON signal, and be not identical with the first PON signal.
Step 102d, the 2nd PON signal is filtered using preset low-pass filter, obtains addition interference signal.
Step 102e, addition interference signal is subtracted from the 2nd AMCC signal, obtains the AMCC letter after addition interference is eliminated
Number.
Optionally, step 102c can be realized by step 102c1~102c2:
Step 102c1, using the first level value as the first decision threshold value, and using the negative value of the first level value as second
Decision threshold value.
Step 102c2, the ratio of the power of the power and PON signal of AMCC signal in the superposed signal sent is calculated, and
Using the ratio of acquisition as the second power ratio.
Step 102c3, superposed signal, the first decision threshold value, the second decision threshold value and the second power based on the received
Ratio rebuilds the first PON signal, and using obtained PON signal as the 2nd PON signal.
Optionally, step 102c can also be realized by step 102c4,102c5:
Step 102c4, hard decision is carried out to received superposed signal, obtains the 3rd PON signal.
Specifically, PON can be simulated by carrying out hard decision to superposed signal since PON signal is by AMCC effect of signals very little
The hard decision of signal, to obtain the regenerated PON signal of hard decision, it is assumed that received superposed signal indicates that Q () indicates hard with r
Judgement, then regenerated PON signal can indicate that (i.e. the 3rd PON signal) is Q (r) after hard decision.
Step 102c5, the product of the first level value and the 3rd PON signal is calculated to rebuild the first PON signal, and will be obtained
PON signal as the 2nd PON signal.
Specifically, the first level value is expressed as kAP, the 3rd PON signal is expressed as Q (r), therefore the first level value and
The product (the 2nd PON signal) of three PON signals is expressed as kAPQ(r)。
Specifically, when the 2nd PON signal is expressed as kAPWhen Q (r), using preset low-pass filter to the 2nd PON signal into
Row filtering refers to: to the 2nd PON signal kAPThe tap coefficient h of Q (r) and preset low-pass filter carries out convolution algorithm, thus
It is expressed asAddition interference signal.Therefore, the AMCC signal r of addition interference is eliminatedAMCC1Such as formula (3)
It is shown:
Assuming that the superposed signal received is expressed as formula (2) and ignores white noise n therein, then wherein by PON signal
AMCC signal (the i.e. r of interferenceAMCC) as shown in formula (4):
First is reduced it should be noted that being filtered to be equivalent to the 2nd PON signal using preset low-pass filter
The addition interference signal of first PON signal in AMCC signal.
Optionally, step 102c3 can be realized by step 102c3a~102c3d:
Step 102c3a, calculate the second power ratio and the first decision threshold value product and the second power ratio with
The product of second decision threshold value, and using the product of the second power ratio and the first decision threshold value as the first product, second
The product of power ratio and the second decision threshold value is as the second product.
Step 102c3b, signal of the received superposed signal higher than the first decision threshold value and received superposition are calculated
Signal is lower than the signal of the second decision threshold value, and received superposed signal is higher than the signal of the first decision threshold value as the
One signal to be processed, received superposed signal are lower than the signal of the second decision threshold value as the second signal to be processed.
Step 102c3c, the difference and the second signal to be processed and second of the first signal to be processed and the first product are calculated
The sum of product, and using the difference of the first signal to be processed and the first product as third signal to be processed, the second signal to be processed and
The sum of second product is as the 4th signal to be processed.
Step 102c3d, the sum of third signal to be processed and the 4th signal to be processed is calculated to rebuild the first PON signal, and
Using obtained PON signal as the 2nd PON signal.
Optionally, on the basis of Fig. 1 corresponding embodiment, the embodiment of the present invention provides another signal processing method,
As shown in Fig. 2, when step 102c by step 102c4,102c5 realize when, obtain addition interference eliminate after, further includes:
Step 103, addition interference is eliminated after AMCC signal disappear as the 3rd AMCC signal, and to the 3rd AMCC signal
AMCC signal except the multiplier interference that the first PON signal generates, after obtaining addition interference and multiplier interference elimination.
Optionally, step 103 can be realized by step 103a, 103b:
Step 103a, Fast Fourier Transform (FFT) is carried out to the tap coefficient of the 3rd AMCC signal and preset low-pass filter
(Fast Fourier Transformation, FFT), has been carried out the 3rd AMCC signal and preset low-pass filter of FFT
Tap coefficient.
Specifically, carrying out FFT to the 3rd AMCC signal is expressed as F (rAMCC1), the 3rd AMCC signal for having carried out FFT indicates
For RAMCC1.FFT is carried out to the tap coefficient of preset low-pass filter and is expressed as F (h), has carried out the preset low-pass filter of FFT
Tap coefficient be expressed as H.
Step 103b, the 3rd AMCC signal and preset low-pass filter of FFT have been carried out according to the first power ratio and
Tap coefficient obtain the AMCC signal after addition interference and multiplier interference are eliminated.
Optionally, step 103b can be realized by step 103b1~103b4:
Step 103b1, to the tap of the 3rd AMCC signal for having carried out FFT and the preset low-pass filter for having carried out FFT
The quotient of coefficient carries out inverse fast Fourier transform (Inverse Fast Fourier Transformation, IFFT), obtains the
Four AMCC signals.
Specifically, obtained 4th AMCC signal indicates are as follows:
Step 103b2, the product of modulation amplitude, obtains the when calculating the first power ratio and the first AMCC signal hair " 1 "
The high value of one AMCC signal, and using obtained level value as second electrical level value.
Specifically, modulation amplitude can be expressed as A when the first AMCC signal hair " 1 "A, therefore the height electricity of the first AMCC signal
Level values (i.e. second electrical level value) are kAA。
Step 103b3, the product for calculating second electrical level value and the 2nd PON signal, obtains the 5th AMCC signal.
Specifically, second electrical level value is expressed as kAA, the 3rd PON signal is expressed as Q (r), second electrical level value and the 2nd PON
The product (i.e. the 5th AMCC signal) of signal is expressed as kAAQ(r)。
Step 103b4, the quotient for calculating the 4th AMCC signal and the 5th AMCC signal, obtains addition interference and multiplier interference disappears
AMCC signal after removing.
Specifically, the AMCC signal after addition interference and multiplier interference eliminationAs shown in formula (5):
Specifically, the derivation process of formula (5) are as follows, formula (4) are substituted into formula (3), obtain formula (6):
Due to SPONIt is equal to Q (r), therefore formula (6) can be expressed as formula (7):
FFT is carried out to formula (7) two sides, obtains formula (8):
RAMCC1=kAAF(sAMCCsPON)·H (8)
Next, obtaining formula (9) all divided by H to two sides:
Then IFFT is carried out to two sides, obtains formula (10):
Finally, two sides are again divided by sPON, and due to sPONIt is equal to Q (r), therefore obtains formula (5).
Optionally, on the basis of Fig. 2 corresponding embodiment, the embodiment of the present invention provides another signal processing method,
As shown in figure 3, after step 103 further include:
Step 104, addition interference and multiplier interference are eliminated after AMCC signal carry out hard decision, obtain addition interference and
After multiplier interference is eliminated and by the AMCC signal of hard decision.
Specifically, the AMCC signal after being eliminated according to the interference that formula (5) obtainsFor soft value signal, need through really up to the mark
Judgement can just obtain final AMCC decision signalIt indicates are as follows:
It should be noted that the method for calculating the bit error rate belongs to the prior art, details are not described herein.
The bit error rate of AMCC signal after step 105, calculating addition interference and multiplier interference are eliminated and by hard decision.
Step 106, the bit error rate for the AMCC signal for judging after addition interference and multiplier interference are eliminated and passing through hard decision are
It is no to be greater than the default bit error rate.
After if step 107, addition interference and multiplier interference are eliminated and big by the bit error rate of the AMCC signal of hard decision
In the default bit error rate, the AMCC signal after eliminating to addition interference and multiplier interference, which successively executes, eliminates the generation of the first PON signal
Addition interference the step of and eliminate the first PON signal generate multiplier interference the step of, until having carried out the dry addition interference of n times
It is not more than the default bit error rate after eliminating with multiplier interference and by the bit error rate of the AMCC signal of hard decision.
Wherein, N is the integer greater than 1.
It should be noted that if the error code of the AMCC signal after addition interference and multiplier interference elimination and by hard decision
Rate is less than or equal to the default bit error rate, and the bit error rate is up to standard after illustrating addition interference and multiplier interference elimination, without again
Further interference is carried out to eliminate.
Specifically, if being greater than after addition interference and multiplier interference elimination and by the bit error rate of the AMCC signal of hard decision
The default bit error rate, the AMCC signal after eliminating to interference continue to execute the addition interference and multiplying property for eliminating that the first PON signal generates
The step of interference, if after second of addition interference and multiplier interference are eliminated and by the bit error rate of the AMCC signal of hard decision not
Greater than the default bit error rate, then the bit error rate is up to standard after illustrating secondary interference elimination, if after second of interference is eliminated and passed through
The bit error rate of the AMCC signal of hard decision is greater than the default bit error rate, and the AMCC signal after eliminating to second of interference eliminates first
The step of addition interference and multiplier interference that PON signal generates ..., disappears until having carried out the dry addition interference of n times and multiplier interference
Except the bit error rate of AMCC signal rear and by hard decision is not more than the default bit error rate.
Optionally, the AMCC signal after eliminating to addition interference and multiplier interference, which successively executes, eliminates the production of the first PON signal
The step of raw addition interference and the step of eliminate the multiplier interference that the first PON signal generates, comprising:
Step 107a, the AMCC signal estimation after superposed signal and addition interference and multiplier interference are eliminated based on the received
PON signal, and using the PON signal of acquisition as the 4th PON signal.
Specifically, the AMCC signal substitution after received superposed signal and addition interference and multiplier interference are eliminated is ignored
The formula (2) of white noise n, the PON signal estimated, using the PON signal as the 4th PON signal to be processed.
Step 107b, after being eliminated with the 4th received superposed signal of PON signal substituting to addition interference and multiplier interference
AMCC signal continues to execute the step of eliminating the addition interference that the first PON signal generates and eliminates multiplying for the first PON signal generation
Property interference the step of.
Specifically, signal processing method provided in an embodiment of the present invention can be realized by AMCC signal interference cancellation module,
The process flow of AMCC signal can be as shown in figure 4, AMCC signal and PON signal be folded by modulation superposition generation superposed signal
Plus signal generates optical signal by T-LD processing, is then sent by optical fiber, is examined with APD to optical signal in receiving end
It surveys, is transformed into electric signal, electric signal is filtered followed by preset filter, obtain PON signal and without interference
The AMCC signal of elimination, (wherein, interference cancellation module carries out interference elimination treatment to following AMCC signal interference cancellation module
Perceptive construction on mathematics is utilized in process) the AMCC signal eliminated without interference is eliminated, disappeared to a certain extent
In addition to the AMCC signal of interference.
Specifically, the process that AMCC signal interference cancellation module carries out interference elimination can be as shown in figure 5, what interference be eliminated
Process flow is described in detail in the present embodiment, and details are not described herein.
Specifically, AMCC signal provided in an embodiment of the present invention extraction with interference eliminate process can with as shown in fig. 6,
In transmitting terminal, PON signal is generated using Error Detector, AMCC signal is generated using arbitrary waveform generator, by the PON signal of generation
It is stacked up with AMCC signal by circuit board modulation.In receiving end, photodetection is carried out using PD/APD, uses optical attenuator
Link attenuation is adjusted to achieve the purpose that control and receive optical power.Electric signal after PD/APD is detected is divided into two-way, send all the way
Enter Error Detector as the direct hard decision of PON signal, is sent into digital signal analyser all the way and digital signals are filtered etc. to signal
Processing is to extract AMCC signal.Specifically, it is about AMCC letter that the electric signal after PD/APD is detected passes through a bandwidth first
The low-pass filter of number transmission rate 70% is filtered, and obtains the AMCC signal (formula (3) by the first PON signal interference
In rAMCC), then the distracter of PON signal in the signal is eliminated, the process of interference cancellation algorithm is as shown in fig. 7, head
First calculate the ratio k of the power of the power of received superposed signal and the superposed signal of transmission；Then to received superposed signal
It carries out hard decision and substitutes into formula (3) after being filtered, obtain the AMCC signal after addition interference is eliminated；Then to addition interference
AMCC signal after elimination carries out FFT, then substitutes into formula (5) for the AMCC signal after FFT has been carried out, and obtains multiplier interference elimination
AMCC signal；It subsequent passes through hard decision and calculates the bit error rate；Then judge whether the bit error rate meets the requirements；If satisfaction is wanted
It asks, then terminates whole flow process, if the requirements are not met, and the AMCC signal replacement after being eliminated using addition interference and multiplier interference is connect
The superposed signal of receipts carries out hard decision and substitutes into formula (3) after being filtered, and then the AMCC signal after interference for the first time is eliminated
On the basis of continue calculate interference eliminate after AMCC signal.In practical applications, we can preset the number of iterations, no
Iteration it all must calculate a bit error rate every time.The program can iteration for several times until the bit error rate of AMCC signal is met the requirements, make
AMCC signal obtains a relatively low bit error rate.
Signal processing method provided in an embodiment of the present invention, AMCC signal after being eliminated to addition interference and multiplier interference into
Row hard decision obtains after addition interference and multiplier interference are eliminated and by the AMCC signal of hard decision and calculates AMCC letter therein
Number the bit error rate；Judge whether the bit error rate being calculated is greater than the default bit error rate；It is dry to additivity if it is greater than the default bit error rate
It disturbs the AMCC signal after eliminating with multiplier interference and continues to execute the addition interference and multiplier interference for eliminating the generation of the first PON signal
Step, after having carried out the dry addition interference of n times and multiplier interference elimination and by the bit error rate of the AMCC signal of hard decision not
Greater than the default bit error rate.From the embodiment of the present invention as it can be seen that due to when addition interference and multiplier interference elimination after and pass through hard decision
The bit error rate of AMCC signal when being greater than the default bit error rate, the AMCC signal after eliminating to addition interference and multiplier interference eliminates the
The step of addition interference and multiplier interference that one PON signal generates, is eliminated until having carried out the dry addition interference of n times and multiplier interference
It is not more than the default bit error rate afterwards and by the bit error rate of the AMCC signal of hard decision, to dramatically disappear in an iterative manner
In addition to interference, the bit error rate is reduced.
The embodiment of the present invention also provides a kind of computer readable storage medium, is stored with computer executable instructions, calculates
Machine executable instruction is for executing any of the above-described signal processing method.
The embodiment of the present invention provides a kind of signal processing apparatus, as shown in figure 8, the signal processing apparatus 2 includes:
Preprocessing module 21 is obtained for being filtered to received superposed signal by the first PON signal interference
AMCC signal；Wherein, received superposed signal is the signal that the first AMCC signal and the first PON Signal averaging are formed.
First processing module 22, the AMCC signal for that will obtain is as the 2nd AMCC signal, and to the 2nd AMCC signal
The addition interference for eliminating the generation of the first PON signal obtains the AMCC signal after addition interference is eliminated.
Signal processing apparatus provided in an embodiment of the present invention is filtered received superposed signal, obtains by first
The AMCC signal of PON signal interference；Wherein, received superposed signal is that the first AMCC signal and the first PON Signal averaging are formed
Signal；Using the AMCC signal of acquisition as the 2nd AMCC signal, and what the first PON signal generated is eliminated to the 2nd AMCC signal
Addition interference obtains the AMCC signal after addition interference is eliminated.From the embodiment of the present invention as it can be seen that due to being obtained to from superposed signal
The AMCC signal by PON signal interference taken eliminates the addition interference of PON signal, obtains the AMCC letter after addition interference is eliminated
Number, to eliminate the interference of PON signal to a certain extent to the AMCC signal extracted from superposed signal, reduce
The bit error rate.
Optionally, preprocessing module 21 is specifically used for: being filtered to received superposed signal using preset low-pass filter
Wave.
First processing module 22 is specifically used for:
The ratio of the power of the power of received superposed signal and the superposed signal of transmission is calculated, and the ratio of acquisition is made
For the first power ratio.
The product of modulation amplitude, obtains the first PON signal when calculating the first power ratio and the first PON signal hair " 1 "
High value, and using obtained level value as the first level value.
The first PON signal is rebuild according to the first level value, and using obtained PON signal as the 2nd PON signal.
The 2nd PON signal is filtered using preset low-pass filter, obtains addition interference signal.
Addition interference signal is subtracted from the 2nd AMCC signal, obtains the AMCC signal after addition interference is eliminated.
Optionally, first processing module 22 is specifically used for:
Using the first level value as the first decision threshold value, and using the negative value of the first level value as the second decision threshold
Value.
The ratio of the power of the power and PON signal of AMCC signal in the superposed signal sent is calculated, and by the ratio of acquisition
Value is used as the second power ratio.
Superposed signal, the first decision threshold value, the second decision threshold value and the second power ratio rebuild the based on the received
One PON signal, and using obtained PON signal as the 2nd PON signal.
Optionally, first processing module 22 is specifically used for:
Calculate the product and the second power ratio and the second decision threshold of the second power ratio and the first decision threshold value
The product of value, and using the product of the second power ratio and the first decision threshold value as the first product, the second power ratio and the
The product of two decision threshold values is as the second product.
Received superposed signal is calculated higher than the signal of the first decision threshold value and received superposed signal lower than second
The signal of decision threshold value, and received superposed signal is higher than the signal of the first decision threshold value as the first letter to be processed
Number, received superposed signal is lower than the signal of the second decision threshold value as the second signal to be processed.
The difference of the first signal to be processed and the first product and the sum of the second signal to be processed and the second product are calculated, and
Using the difference of the first signal to be processed and the first product as third signal to be processed, the sum of the second signal to be processed and the second product
As the 4th signal to be processed.
The sum of third signal to be processed and the 4th signal to be processed is calculated to rebuild the first PON signal, and the PON that will be obtained
Signal is as the 2nd PON signal.
Optionally, first processing module 22 is specifically used for:
Hard decision is carried out to received superposed signal, obtains the 3rd PON signal.
The product of the first level value and the 3rd PON signal is calculated to rebuild the first PON signal, and the PON signal that will be obtained
As the 2nd PON signal.
Optionally, on the basis of Fig. 8 corresponding embodiment, the embodiment of the present invention provides another signal processing apparatus,
As shown in figure 9, the signal processing apparatus 2 further include:
Second processing module 23, for the AMCC signal after eliminating addition interference as the 3rd AMCC signal, and to
Three AMCC signals eliminate the multiplier interference that the first PON signal generates, the AMCC letter after obtaining addition interference and multiplier interference elimination
Number.
Optionally, Second processing module 23 is specifically used for:
FFT is carried out to the tap coefficient of the 3rd AMCC signal and preset low-pass filter, has been carried out the third of FFT
The tap coefficient of AMCC signal and preset low-pass filter.
According to the first power ratio and the tap coefficient for the 3rd AMCC signal and preset low-pass filter for having carried out FFT
AMCC signal after obtaining addition interference and multiplier interference elimination.
Optionally, Second processing module 23 is specifically used for:
To carried out FFT the 3rd AMCC signal and carried out FFT preset low-pass filter tap coefficient quotient into
Row IFFT obtains the 4th AMCC signal.
The product of modulation amplitude, obtains the first AMCC signal when calculating the first power ratio and the first AMCC signal hair " 1 "
High value, and using obtained level value as second electrical level value.
The product for calculating second electrical level value and the 3rd PON signal, obtains the 5th AMCC signal.
The quotient for calculating the 4th AMCC signal and the 5th AMCC signal, the AMCC after obtaining addition interference and multiplier interference elimination
Signal.
Optionally, on the basis of Fig. 9 corresponding embodiment, the embodiment of the present invention provides another signal processing apparatus,
As shown in Figure 10, the signal processing apparatus 2 further include:
Third processing module 24 carries out hard decision for the AMCC signal after eliminating to addition interference and multiplier interference, obtains
After being eliminated to addition interference and multiplier interference and by the AMCC signal of hard decision.
Computing module 25, for calculating the mistake of the AMCC signal after addition interference and multiplier interference are eliminated and by hard decision
Code rate.
Judgment module 26, for judging the mistake of the AMCC signal after addition interference and multiplier interference are eliminated and by hard decision
Whether code rate is greater than the default bit error rate.
Fourth processing module 27, if after being eliminated for addition interference and multiplier interference and by the AMCC signal of hard decision
The bit error rate be greater than the default bit error rate, the AMCC signal after eliminating to addition interference and multiplier interference, which successively executes, eliminates first
The step of multiplier interference that the step of addition interference that PON signal generates and the first PON signal of elimination generate, until having carried out N
It is not more than the default bit error rate after secondary dry addition interference and multiplier interference are eliminated and by the bit error rate of the AMCC signal of hard decision；Its
In, N is the integer greater than 1.
Optionally, fourth processing module is specifically used for:
AMCC signal after superposed signal and addition interference and multiplier interference are eliminated based on the received estimates PON signal,
And using the PON signal of acquisition as the 4th PON signal.
AMCC signal after being eliminated with the 4th received superposed signal of PON signal substituting to addition interference and multiplier interference after
The continuous step for executing the step of eliminating the addition interference that the first PON signal generates and eliminating the multiplier interference that the first PON signal generates
Suddenly.
Signal processing apparatus provided in an embodiment of the present invention, AMCC signal after being eliminated to addition interference and multiplier interference into
Row hard decision obtains after addition interference and multiplier interference are eliminated and by the AMCC signal of hard decision and calculates AMCC letter therein
Number the bit error rate；Judge whether the bit error rate being calculated is greater than the default bit error rate；It is dry to additivity if it is greater than the default bit error rate
It disturbs the AMCC signal after eliminating with multiplier interference and continues to execute the addition interference and multiplier interference for eliminating the generation of the first PON signal
Step, after having carried out the dry addition interference of n times and multiplier interference elimination and by the bit error rate of the AMCC signal of hard decision not
Greater than the default bit error rate.From the embodiment of the present invention as it can be seen that due to when addition interference and multiplier interference elimination after and pass through hard decision
The bit error rate of AMCC signal when being greater than the default bit error rate, the AMCC signal after eliminating to addition interference and multiplier interference eliminates the
The step of addition interference and multiplier interference that one PON signal generates, is eliminated until having carried out the dry addition interference of n times and multiplier interference
It is not more than the default bit error rate afterwards and by the bit error rate of the AMCC signal of hard decision, to dramatically disappear in an iterative manner
In addition to interference, the bit error rate is reduced.
In practical applications, the preprocessing module 21, first processing module 22, Second processing module 23, third processing
Module 24, computing module 25, judgment module 26 and fourth processing module 27 can be by the centres in signal processing apparatus
Manage device (Central Processing Unit, CPU), microprocessor (Micro Processor Unit, MPU), digital signal
Processor (Digital Signal Processor, DSP) or field programmable gate array (Field Programmable
Gate Array, FPGA) etc. realize.
The embodiment of the present invention also provides a kind of device eliminated for realizing interference, including memory and processor, wherein
The following instruction being executed by processor is stored in memory:
Received superposed signal is filtered, the AMCC signal by the first PON signal interference is obtained；Wherein, it receives
Superposed signal be signal that the first AMCC signal and the first PON Signal averaging are formed.
Using the AMCC signal of acquisition as the 2nd AMCC signal, and the first PON signal is eliminated to the 2nd AMCC signal and is generated
Addition interference, obtain addition interference eliminate after AMCC signal.
Optionally, the following instruction being executed by processor specifically is stored in memory:
Received superposed signal is filtered using preset low-pass filter.
The ratio of the power of the power of received superposed signal and the superposed signal of transmission is calculated, and the ratio of acquisition is made
For the first power ratio.
The product of modulation amplitude, obtains the first PON signal when calculating the first power ratio and the first PON signal hair " 1 "
High value, and using obtained level value as the first level value.
The first PON signal is rebuild according to the first level value, and using obtained PON signal as the 2nd PON signal.
The 2nd PON signal is filtered using preset low-pass filter, obtains addition interference signal.
Addition interference signal is subtracted from the 2nd AMCC signal, obtains the AMCC signal after addition interference is eliminated.
Optionally, the following instruction being executed by processor also specifically is stored in memory:
Using the first level value as the first decision threshold value, and using the negative value of the first level value as the second decision threshold
Value.
The ratio of the power of the power and PON signal of AMCC signal in the superposed signal sent is calculated, and by the ratio of acquisition
Value is used as the second power ratio.
Superposed signal, the first decision threshold value, the second decision threshold value and the second power ratio rebuild the based on the received
One PON signal, and using obtained PON signal as the 2nd PON signal.
Optionally, the following instruction being executed by processor also specifically is stored in memory:
Calculate the product and the second power ratio and the second decision threshold of the second power ratio and the first decision threshold value
The product of value, and using the product of the second power ratio and the first decision threshold value as the first product, the second power ratio and the
The product of two decision threshold values is as the second product；
Received superposed signal is calculated higher than the signal of the first decision threshold value and received superposed signal lower than second
The signal of decision threshold value, and received superposed signal is higher than the signal of the first decision threshold value as the first letter to be processed
Number, received superposed signal is lower than the signal of the second decision threshold value as the second signal to be processed.
The difference of the first signal to be processed and the first product and the sum of the second signal to be processed and the second product are calculated, and
Using the difference of the first signal to be processed and the first product as third signal to be processed, the sum of the second signal to be processed and the second product
As the 4th signal to be processed.
The sum of third signal to be processed and the 4th signal to be processed is calculated to rebuild the first PON signal, and the PON that will be obtained
Signal is as the 2nd PON signal.
Optionally, the following instruction being executed by processor specifically is stored in memory:
Hard decision is carried out to received superposed signal, obtains the 3rd PON signal.
The product of the first level value and the 3rd PON signal is calculated to rebuild the first PON signal, and the PON signal that will be obtained
As the 2nd PON signal.
Optionally, the following instruction being executed by processor also is stored in memory:
AMCC signal after addition interference is eliminated eliminates first as the 3rd AMCC signal, and to the 3rd AMCC signal
The multiplier interference that PON signal generates, the AMCC signal after obtaining addition interference and multiplier interference elimination.
Optionally, the following instruction being executed by processor specifically is stored in memory:
FFT is carried out to the tap coefficient of the 3rd AMCC signal and preset low-pass filter, has been carried out the third of FFT
The tap coefficient of AMCC signal and preset low-pass filter.
According to the first power ratio and the tap coefficient for the 3rd AMCC signal and preset low-pass filter for having carried out FFT
AMCC signal after obtaining addition interference and multiplier interference elimination.
Optionally, the following instruction being executed by processor specifically is stored in memory:
To carried out FFT the 3rd AMCC signal and carried out FFT preset low-pass filter tap coefficient quotient into
Row IFFT obtains the 4th AMCC signal.
The product of modulation amplitude, obtains the first AMCC signal when calculating the first power ratio and the first AMCC signal hair " 1 "
High value, and using obtained level value as second electrical level value.
The product for calculating second electrical level value and the 3rd PON signal, obtains the 5th AMCC signal.
The quotient for calculating the 4th AMCC signal and the 5th AMCC signal, the AMCC after obtaining addition interference and multiplier interference elimination
Signal.
Optionally, the following instruction being executed by processor also is stored in memory:
AMCC signal after eliminating to addition interference and multiplier interference carries out hard decision, obtains addition interference and multiplier interference
After elimination and by the AMCC signal of hard decision.
The bit error rate of AMCC signal after calculating addition interference and multiplier interference are eliminated and by hard decision.
Judge whether to be greater than after addition interference and multiplier interference are eliminated and by the bit error rate of the AMCC signal of hard decision pre-
If the bit error rate.
If being greater than default miss after addition interference and multiplier interference are eliminated and by the bit error rate of the AMCC signal of hard decision
Code rate, it is dry that the AMCC signal after eliminating to addition interference and multiplier interference successively executes the additivity that the first PON signal of elimination generates
It is the step of multiplier interference that the step of disturbing and the first PON signal of elimination generate, dry until having carried out the dry addition interference of n times and multiplying property
It disturbs after eliminating and is not more than the default bit error rate by the bit error rate of the AMCC signal of hard decision；Wherein, N is the integer greater than 1.
Optionally, the following instruction being executed by processor specifically is stored in memory:
AMCC signal after superposed signal and addition interference and multiplier interference are eliminated based on the received estimates PON signal,
And using the PON signal of acquisition as the 4th PON signal.
AMCC signal after being eliminated with the 4th received superposed signal of PON signal substituting to addition interference and multiplier interference after
The continuous step for executing the step of eliminating the addition interference that the first PON signal generates and eliminating the multiplier interference that the first PON signal generates
Suddenly.
Although disclosed herein embodiment it is as above, the content only for ease of understanding the present invention and use
Embodiment is not intended to limit the invention.Technical staff in any fields of the present invention is taken off not departing from the present invention
Under the premise of the spirit and scope of dew, any modification and variation, but the present invention can be carried out in the form and details of implementation
Scope of patent protection, still should be subject to the scope of the claims as defined in the appended claims.
Claims (20)
1. a kind of signal processing method, comprising:
Received superposed signal is filtered, the Added Management control by the first passive optical-fiber network PON signal interference is obtained
AMCC signal in channel processed；Wherein, the received superposed signal is that the first AMCC signal and the first PON Signal averaging are formed
Signal；
Using the AMCC signal of acquisition as the 2nd AMCC signal, and the first PON signal is eliminated to the 2nd AMCC signal and is generated
Addition interference, obtain addition interference eliminate after AMCC signal.
2. signal processing method according to claim 1, which is characterized in that described to be filtered to received superposed signal
It include: to be filtered to received superposed signal using preset low-pass filter；
It is described that the addition interference that the first PON signal generates is eliminated to the 2nd AMCC signal, obtain the AMCC after addition interference is eliminated
Signal, comprising:
The ratio of the power of the power of received superposed signal and the superposed signal of transmission is calculated, and using the ratio of acquisition as
One power ratio；
The product of modulation amplitude, obtains described first when calculating first power ratio and the first PON signal hair " 1 "
The high value of PON signal, and using obtained level value as the first level value；
The first PON signal is rebuild according to first level value, and using obtained PON signal as the 2nd PON signal；
The 2nd PON signal is filtered using the preset low-pass filter, obtains addition interference signal；
The addition interference signal is subtracted from the 2nd AMCC signal, obtains the AMCC letter after the addition interference is eliminated
Number.
3. signal processing method according to claim 2, which is characterized in that described to rebuild first according to the first level value
PON signal, and using obtained PON signal as the 2nd PON signal, comprising:
Using first level value as the first decision threshold value, and using the negative value of first level value as the second decision gate
Limit value；
The ratio of the power of the power and PON signal of AMCC signal in the superposed signal sent is calculated, and the ratio of acquisition is made
For the second power ratio；
Superposed signal, first decision threshold value, second decision threshold value and second power ratio based on the received
Value rebuilds the first PON signal, and using obtained PON signal as the 2nd PON signal.
4. signal processing method according to claim 3, which is characterized in that the superposed signal based on the received, described
First decision threshold value, second decision threshold value and second power ratio reconstruction the first PON signal, and will
The PON signal arrived is as the 2nd PON signal, comprising:
Calculate second power ratio and first decision threshold value product and second power ratio with it is described
The product of second decision threshold value, and using the product of second power ratio and the first decision threshold value as the first product,
The product of second power ratio and the second decision threshold value is as the second product；
Calculate signal of the received superposed signal higher than first decision threshold value and the received superposed signal
Make lower than the signal of second decision threshold value, and by the signal that the received superposed signal is higher than the first decision threshold value
For the first signal to be processed, the received superposed signal is lower than the signal of the second decision threshold value as the second letter to be processed
Number；
Calculate the difference and second signal to be processed and described second of the described first signal to be processed and first product
The sum of product, and using the difference of the described first signal to be processed and the first product as third signal to be processed, described second wait locate
The sum of signal and the second product is managed as the 4th signal to be processed；
The sum of third signal to be processed and the 4th signal to be processed is calculated to rebuild the first PON signal, and will
Obtained PON signal is as the 2nd PON signal.
5. signal processing method according to claim 2, which is characterized in that described to rebuild first according to the first level value
PON signal, and using obtained PON signal as the 2nd PON signal, comprising:
Hard decision is carried out to received superposed signal, obtains the 3rd PON signal；
The product of first level value and the 3rd PON signal is calculated to rebuild the first PON signal, and will obtained
PON signal is as the 2nd PON signal.
6. signal processing method described according to claim 1 or 2 or 5, which is characterized in that it is described obtain addition interference eliminate after
AMCC signal after, further includes:
AMCC signal after the addition interference is eliminated eliminates institute as the 3rd AMCC signal, and to the 3rd AMCC signal
The multiplier interference for stating the generation of the first PON signal, the AMCC signal after obtaining addition interference and multiplier interference elimination.
7. signal processing method according to claim 6, which is characterized in that described to eliminate first to the 3rd AMCC signal
The multiplier interference that PON signal generates, the AMCC signal after obtaining addition interference and multiplier interference elimination, comprising:
Fast Fourier Transform (FFT) FFT is carried out to the tap coefficient of the 3rd AMCC signal and preset low-pass filter, obtain into
Gone FFT the 3rd AMCC signal and preset low-pass filter tap coefficient；
According to first power ratio and the tap coefficient for the 3rd AMCC signal and preset low-pass filter for having carried out FFT
AMCC signal after obtaining addition interference and multiplier interference elimination.
8. signal processing method according to claim 7, which is characterized in that described according to the first power ratio and progress
After the 3rd AMCC signal of FFT and the tap coefficient of preset low-pass filter obtain addition interference and multiplier interference eliminates
AMCC signal, comprising:
The quotient of the tap coefficient of the 3rd AMCC signal for having carried out FFT and the preset low-pass filter for having carried out FFT is carried out fast
Fast inverse Fourier transform IFFT, obtains the 4th AMCC signal；
The product of modulation amplitude, obtains described first when calculating first power ratio and the first AMCC signal hair " 1 "
The high value of AMCC signal, and using obtained level value as second electrical level value；
The product for calculating the second electrical level value and the 3rd PON signal, obtains the 5th AMCC signal；
The quotient for calculating the 4th AMCC signal and the 5th AMCC signal, obtains the addition interference and multiplier interference is eliminated
AMCC signal afterwards.
9. signal processing method according to claim 7 or 8, which is characterized in that addition interference and the multiplying property of obtaining is done
After AMCC signal after disturbing elimination, further includes:
AMCC signal after eliminating to the addition interference and multiplier interference carries out hard decision, obtains the addition interference and multiplying property
After interference is eliminated and by the AMCC signal of hard decision；
Calculate the bit error rate of the AMCC signal after the addition interference and multiplier interference are eliminated and by hard decision；
Judge whether to be greater than after the addition interference and multiplier interference are eliminated and by the bit error rate of the AMCC signal of hard decision pre-
If the bit error rate；
If be greater than after the addition interference and multiplier interference are eliminated and by the bit error rate of the AMCC signal of hard decision described pre-
If the bit error rate, the AMCC signal after eliminating to the addition interference and multiplier interference successively executes the first PON signal of the elimination
It is the step of addition interference of generation and described the step of eliminating the multiplier interference that the first PON signal generates, dry until having carried out n times
It is not more than the default bit error rate after addition interference and multiplier interference are eliminated and by the bit error rate of the AMCC signal of hard decision；Its
In, N is the integer greater than 1.
10. signal processing method according to claim 9, which is characterized in that described to disappear to addition interference and multiplier interference
AMCC signal after removing successively executes the step of eliminating the addition interference that the first PON signal generates and eliminates the first PON signal and produces
The step of raw multiplier interference, comprising:
AMCC signal after superposed signal and the addition interference and multiplier interference are eliminated based on the received estimates PON signal,
And using the PON signal of acquisition as the 4th PON signal；
AMCC after being eliminated with the received superposed signal of the 4th PON signal substituting to the addition interference and multiplier interference believes
The step of number continuing to execute the addition interference that the first PON signal of the elimination generates and described eliminate what the first PON signal generated
The step of multiplier interference.
11. a kind of signal processing apparatus characterized by comprising
Preprocessing module obtains and is believed by the AMCC of the first PON signal interference for being filtered to received superposed signal
Number；Wherein, the received superposed signal is the signal that the first AMCC signal and the first PON Signal averaging are formed；
First processing module, the AMCC signal for that will obtain disappear as the 2nd AMCC signal, and to the 2nd AMCC signal
Except the addition interference that the first PON signal generates, the AMCC signal after addition interference is eliminated is obtained.
12. signal processing apparatus according to claim 11, which is characterized in that the preprocessing module, be specifically used for pair
Received superposed signal is filtered using preset low-pass filter；
The first processing module, is specifically used for:
The ratio of the power of the power of received superposed signal and the superposed signal of transmission is calculated, and using the ratio of acquisition as
One power ratio；
The product of modulation amplitude, obtains described first when calculating first power ratio and the first PON signal hair " 1 "
The high value of PON signal, and using obtained level value as the first level value；
The first PON signal is rebuild according to first level value, and using obtained PON signal as the 2nd PON signal；
The 2nd PON signal is filtered using the preset low-pass filter, obtains addition interference signal；
The addition interference signal is subtracted from the 2nd AMCC signal, obtains the AMCC letter after the addition interference is eliminated
Number.
13. signal processing apparatus according to claim 12, which is characterized in that the first processing module is specifically used for:
Using first level value as the first decision threshold value, and using the negative value of first level value as the second decision gate
Limit value；
The ratio of the power of the power and PON signal of AMCC signal in the superposed signal sent is calculated, and the ratio of acquisition is made
For the second power ratio；
Superposed signal, first decision threshold value, second decision threshold value and second power ratio based on the received
Value rebuilds the first PON signal, and using obtained PON signal as the 2nd PON signal.
14. signal processing apparatus according to claim 13, which is characterized in that the first processing module is specifically used for:
Calculate second power ratio and first decision threshold value product and second power ratio with it is described
The product of second decision threshold value, and using the product of second power ratio and the first decision threshold value as the first product,
The product of second power ratio and the second decision threshold value is as the second product；
Calculate signal of the received superposed signal higher than first decision threshold value and the received superposed signal
Make lower than the signal of second decision threshold value, and by the signal that the received superposed signal is higher than the first decision threshold value
For the first signal to be processed, the received superposed signal is lower than the signal of the second decision threshold value as the second letter to be processed
Number；
Calculate the difference and second signal to be processed and described second of the described first signal to be processed and first product
The sum of product, and using the difference of the described first signal to be processed and the first product as third signal to be processed, described second wait locate
The sum of signal and the second product is managed as the 4th signal to be processed；
The sum of third signal to be processed and the 4th signal to be processed is calculated to rebuild the first PON signal, and will
Obtained PON signal is as the 2nd PON signal.
15. signal processing apparatus according to claim 12, which is characterized in that the first processing module is specifically used for:
Hard decision is carried out to received superposed signal, obtains the 3rd PON signal；
The product of first level value and the 3rd PON signal is calculated to rebuild the first PON signal, and will obtained
PON signal is as the 2nd PON signal.
16. signal processing apparatus described in 1,12 or 15 according to claim 1, which is characterized in that further include:
Second processing module, for the AMCC signal after eliminating the addition interference as the 3rd AMCC signal, and to described
3rd AMCC signal eliminates the multiplier interference that the first PON signal generates, after obtaining addition interference and multiplier interference elimination
AMCC signal.
17. signal processing apparatus according to claim 16, which is characterized in that the Second processing module is specifically used for:
FFT is carried out to the tap coefficient of the 3rd AMCC signal and preset low-pass filter, has been carried out the third of FFT
The tap coefficient of AMCC signal and preset low-pass filter；
According to first power ratio and the tap coefficient for the 3rd AMCC signal and preset low-pass filter for having carried out FFT
AMCC signal after obtaining addition interference and multiplier interference elimination.
18. signal processing apparatus according to claim 17, which is characterized in that the Second processing module is specifically used for:
The quotient of the tap coefficient of the 3rd AMCC signal for having carried out FFT and the preset low-pass filter for having carried out FFT is carried out
IFFT obtains the 4th AMCC signal；
The product of modulation amplitude, obtains described first when calculating first power ratio and the first AMCC signal hair " 1 "
The high value of AMCC signal, and using obtained level value as second electrical level value；
The product for calculating the second electrical level value and the 3rd PON signal, obtains the 5th AMCC signal；
The quotient for calculating the 4th AMCC signal and the 5th AMCC signal, obtains the addition interference and multiplier interference is eliminated
AMCC signal afterwards.
19. signal processing apparatus described in 7 or 18 according to claim 1, which is characterized in that further include:
Third processing module carries out hard decision for the AMCC signal after eliminating to the addition interference and multiplier interference, obtains
After the addition interference and multiplier interference are eliminated and by the AMCC signal of hard decision；
Computing module, for calculating the error code of the AMCC signal after the addition interference and multiplier interference are eliminated and by hard decision
Rate；
Judgment module, for judging the error code of the AMCC signal after the addition interference and multiplier interference are eliminated and by hard decision
Whether rate is greater than the default bit error rate；
Fourth processing module, if after being eliminated for the addition interference and multiplier interference and by the AMCC signal of hard decision
The bit error rate is greater than the default bit error rate, described in the AMCC signal after eliminating to the addition interference and multiplier interference successively executes
The step of eliminating the addition interference of the first PON signal generation and described the step of eliminating the multiplier interference that the first PON signal generates,
No more than institute after having carried out the dry addition interference of n times and multiplier interference elimination and by the bit error rate of the AMCC signal of hard decision
State the default bit error rate；Wherein, N is the integer greater than 1.
20. signal processing apparatus according to claim 19, which is characterized in that the fourth processing module is specifically used for:
AMCC signal after superposed signal and the addition interference and multiplier interference are eliminated based on the received estimates PON signal,
And using the PON signal of acquisition as the 4th PON signal；
AMCC after being eliminated with the received superposed signal of the 4th PON signal substituting to the addition interference and multiplier interference believes
The step of number continuing to execute the addition interference that the first PON signal of the elimination generates and described eliminate what the first PON signal generated
The step of multiplier interference.
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| WO2021147075A1 (en) * | 2020-01-23 | 2021-07-29 | Oppo广东移动通信有限公司 | Interference cancellation method and apparatus |
| CN116223909A (en) * | 2022-11-18 | 2023-06-06 | 南方电网数字电网研究院有限公司 | Reconstruction method, reconstruction device, reconstruction server and storage medium for superimposed signals |
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| CN117270123B (en) * | 2023-11-23 | 2024-03-19 | 之江实验室 | Multichannel photoelectric receiving and transmitting integrated system |
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| CN107147513B (en) * | 2016-03-01 | 2019-03-15 | 中兴通讯股份有限公司 | A kind of management method and optical module of multi-wavelength passive optical network |
| WO2017212555A1 (en) * | 2016-06-07 | 2017-12-14 | 三菱電機株式会社 | Optical reception device |
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| CN101043271A (en) * | 2007-04-26 | 2007-09-26 | 华为技术有限公司 | Method, equipment and system for switching optical service signal protection |
| CN102122989A (en) * | 2010-01-08 | 2011-07-13 | 华为技术有限公司 | Line monitoring method, device and system |
| US20140186051A1 (en) * | 2011-09-06 | 2014-07-03 | Hitachi, Ltd. | Sensor terminal |
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| CN116223909A (en) * | 2022-11-18 | 2023-06-06 | 南方电网数字电网研究院有限公司 | Reconstruction method, reconstruction device, reconstruction server and storage medium for superimposed signals |
| CN116223909B (en) * | 2022-11-18 | 2023-12-12 | 南方电网数字电网研究院有限公司 | Reconstruction method, reconstruction device, reconstruction server and storage medium for superimposed signals |
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| WO2019144900A1 (en) | 2019-08-01 |
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