CN102377485A - Method and device for demodulating pilot-tone modulation signals - Google Patents
Method and device for demodulating pilot-tone modulation signals Download PDFInfo
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- CN102377485A CN102377485A CN2011103140927A CN201110314092A CN102377485A CN 102377485 A CN102377485 A CN 102377485A CN 2011103140927 A CN2011103140927 A CN 2011103140927A CN 201110314092 A CN201110314092 A CN 201110314092A CN 102377485 A CN102377485 A CN 102377485A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/077—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
- H04B10/0775—Performance monitoring and measurement of transmission parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2210/00—Indexing scheme relating to optical transmission systems
- H04B2210/07—Monitoring an optical transmission system using a supervisory signal
- H04B2210/075—Monitoring an optical transmission system using a supervisory signal using a pilot tone
Abstract
The invention discloses a method and device for demodulating pilot-tone modulation signals. The method comprises the following steps of: calculating an intensity value at a frequency position of each received pilot-tone modulation signal in a subsection manner according to a set time period; judging a signal intensity range and a noise intensity range at the frequency position of the received pilot-tone modulation signal at each time period according to the received intensity value during each time period; matching each intensity value with the intensity range within the corresponding time period to obtain the intensity range of each intensity value so that a bit value corresponding to each intensity value is demodulated. The device comprises an intensity value calculation module, an intensity range obtaining module and a bit information obtaining module. According to the method and device for demodulating the pilot-tone modulation signals, the pilot-tone modulation signals are demodulated regardless of the distribution state of noise by using the intensity range of dynamic regulation noise and the intensity range of the pilot-tone modulation signals; furthermore, the pilot-tone modulation signals are demodulated by using a corresponding relation between the same frequency of the pilot-tone modulation signals and a wavelength.
Description
Technical field
The present invention relates to the optical communication network technical field, relate in particular to a kind of method and apparatus that the top signal is transferred in light modulation of separating.
Background technology
Along with WDM (Wavelength Division Multiplex; Wavelength division multiplexing) development; Current optical communication network can transmit a plurality of light signals or the optical channel of different wave length simultaneously in same optical fiber; And based on ROADM (Reconfigurable Optical Add-Drop Multiplexer; ROADM) technology has made things convenient for the configuration as required of each wavelength in the optical communication, makes that the wavelength in the optical-fiber network is not the path that keeps same between two websites, and perhaps certain wavelength is not to distribute to certain 2 website forever yet.
Survey in order to carry out network topology identification and optical channel; The light of stack low frequency is transferred top signal or optical label signal on can the wavelength in optical-fiber network; The light in the identification optical channel is transferred top signal or optical label signal on each node in network simultaneously; Through solving information entrained in the optical label signal, obtain information such as the transmission path of light signal in network is relevant with other wavelength.The mode that loads optical label signal comprises makes the electricity consumption adjustable optical attenuator, have the optical transmitting set of low speed modulation system or have the high speed business modulator (like the MZ modulator) etc. of low speed modulation system; Transfer the mode of the information in top signal or the optical label signal can use FFT (Fast Fourier Transform and separate bright dipping; FFT) algorithm or DFT (Discrete Fourier Transform; DFT) algorithm etc.; From light signal, find the frequency of each label, and judge the wherein entrained information of cursor label of each frequency.
In an optical fiber, possibly there is the multichannel wavelength, each road wavelength carries the frequency content that one or more light are transferred the top signal, so possibly have the frequency content of a lot of accent top signals in optical fiber.Be mapped in order accurately to transfer the frequency content of top signal to judge the relevant information of wavelength, need and to transfer between the signal frequency of top wavelength based on these.Separating timing,, otherwise can judge that the light that does not have this frequency content transfers the top signal if the intensity that calculates a certain frequency content in the section sometime during greater than preset value, can judge that then this frequency content exists.
Yet owing to have various noises in the system, also possibly there is bigger frequency content in noise in light is transferred top signal frequency section, promptly greater than preset value, causes the cursor label frequency on this noise frequency not use.Carry out the timing of separating that light is transferred the top signal according to preset value, can judge this frequency signal and always exist, just can not be correct conveyed a message.But, if from available light accent top signal frequency, remove the frequency that stronger noise is arranged, just possibly cause intrinsic light to transfer the corresponding relation between top signal frequency and the wavelength that confusion takes place, be not used in the enforcement that whole accent top is designed.
Summary of the invention
The present invention provides a kind of method and apparatus that the top signal is transferred in light modulation of separating, and in order to solve in the optical-fiber network that contains light accent top signal frequency, how under The noise, to extract the problem that the top signal is transferred in bright dipping
In order to solve the problems of the technologies described above, the technical scheme that the present invention adopts is following:
On the one hand, the present invention provides a kind of method that the top signal is transferred in light modulation of separating, and comprising:
Steps A, by the time period of setting, segmentation is calculated each light that receives and is transferred the intensity level at signal frequency place, top;
Step B utilizes each intensity level in each time period that calculates, and judges the signal strength range and the noise intensity scope at each light accent signal frequency place, top in each time period;
Step C matees each intensity level and the said strength range in the corresponding time period, obtain the residing strength range of each intensity level after, demodulate the corresponding bit value of each intensity level.
Further, in the method for the invention, said step B specifically comprises:
A plurality of intensity levels in each time period that utilization calculates are judged the distribution of each intensity level in each time period;
According to the signal modulation system of signal transmission source end, determine signal strength range and noise intensity scope in the distribution of each intensity level in each time period.
Further, in the method for the invention, said step C specifically comprises:
Each intensity level and signal strength range in the corresponding time period and noise intensity scope are mated;
Based on the result of coupling, confirm that the residing strength range of each intensity level is signal strength range or is the noise intensity scope;
Based on the type of the said strength range of confirming, binding signal sends the modulation system of source end, obtains the corresponding bit value of each intensity level with said strength range coupling.
Preferably, the method for the invention also comprises:
Add up the number of the existing strength range of intensity level at each light accent signal frequency place, top in continuous a plurality of time period;
The strength range number of the corresponding frequencies of the strength range number of the corresponding frequencies that statistics is obtained and the modulation of signal transmission source end compares, when two scope numbers are not inconsistent, based on preset alarm configuration, outputting alarm information.
Wherein, said when two scope numbers are not inconsistent, based on preset alarm configuration outputting alarm information, specifically comprise:
When the intensity value range number that obtains when statistics was less than the intensity value range number of signal transmission source end modulation, output light was transferred the warning information of top dropout;
The intensity value range number that obtains when statistics is during more than the intensity value range number of signal transmission source end modulation, and output light is transferred the warning information of top signal conflict.
On the other hand, also a kind of device of separating light modulation accent top signal of the present invention comprises:
The intensity level computing module was used for by the time period of setting, and segmentation is calculated each light that receives and transferred the intensity level at signal frequency place, top;
The strength range acquisition module is used to utilize each intensity level in each time period that said intensity level computing module calculates, and judges signal strength range and noise intensity scope that each light in each time period is transferred signal frequency place, top;
The bit information acquisition module is used for each intensity level and the said strength range in the corresponding time period are mated, obtain the residing strength range of each intensity level after, demodulate the corresponding bit value of each intensity level.
Further, in the device according to the invention, said strength range acquisition module comprises:
Distribution is judged submodule, is used to utilize a plurality of intensity levels in each time period that calculates, and judges the distribution of each intensity level in each time period;
Strength range is obtained submodule, is used for the signal modulation system according to the signal transmission source end, determines signal strength range and noise intensity scope in the distribution of each intensity level in each time period.
Further, in the device according to the invention, said bit information acquisition module comprises:
Matched sub-block is used for each intensity level and signal strength range in the corresponding time period and noise intensity scope are mated;
Scope is confirmed submodule, is used for the result based on coupling, confirms that the residing strength range of each intensity level is signal strength range or is the noise intensity scope;
Bit value is confirmed submodule, is used for the type based on the said strength range of confirming, binding signal sends the modulation system of source end, obtains the corresponding bit value of each intensity level with said strength range coupling.
Preferably, device according to the invention also comprises:
Alarm module is used to add up the number that each interior light of continuous a plurality of time period is transferred the existing strength range of intensity level at signal frequency place, top; The strength range number of the corresponding frequencies of the strength range number of the corresponding frequencies that statistics is obtained and the modulation of signal transmission source end compares, when two scope numbers are not inconsistent, based on preset alarm configuration, outputting alarm information.
Wherein, said alarm module further comprises:
When loss of signal alarm submodule, the intensity value range number that is used for obtaining in statistics were less than the intensity value range number of signal transmission source end modulation, output light was transferred the warning information of top dropout;
Signal conflict alarm submodule, the intensity value range number that is used for obtaining in statistics are during more than the intensity value range number of signal transmission source end modulation, and output light is transferred the warning information of top signal conflict.
Compared with prior art, beneficial effect of the present invention is following:
The method of the invention and device; Transfer the amplitude strength value on the signal frequency of top through repeatedly calculating each light; Realized transferring the strength range of the noise at signal frequency place, top to transfer the division of the strength range of top signal, and utilized the strength range of dividing to demodulate the bit value that carries on each light accent top signal frequency accurately with light to each light.
Simultaneously; The number of the existing scope of intensity level that the present invention can also calculate according to certain several time period; Judge whether to have taken place accent top dropout or transfer the top signal conflict, and then judge whether to exist wavelength to lose or accident such as wavelength conflict, realized the function of alarm.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is a kind of flow chart that the method for top signal is transferred in light modulation of separating provided by the invention;
Fig. 2 is the possible noise profile condition diagram of certain frequency range;
Fig. 3 is the possible noise profile condition diagram of another frequency range;
Fig. 4 loads the sketch map that light is transferred the top signal frequency among the embodiment one;
Fig. 5 is the strength range sketch map of each frequency of obtaining among the embodiment one;
Fig. 6 loads the sketch map that light is transferred the top signal frequency among the embodiment two;
Fig. 7 is the strength range sketch map of each frequency of obtaining among the embodiment two;
Fig. 8 calculates the strength range distribution map that top signal frequency f1 is transferred in bright dipping in a period of time among the embodiment three;
Fig. 9 calculates the strength range distribution map that top signal frequency f1 is transferred in bright dipping in another period among the embodiment three;
Figure 10 is a kind of structural representation that the device of top signal is transferred in light modulation of separating provided by the invention.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
The present invention provides a kind of method and apparatus that the top signal is transferred in light modulation of separating; The strength range of noise and the strength range that light is transferred the top signal are dynamically adjusted in said method utilization; When realize understanding light modulation and transferring the top signal no matter the distribution of noise; Can use same light to transfer the corresponding relation between top signal frequency and the wavelength to carry out the demodulation that light is transferred the top signal, also can diagnose accidents such as whether accent top dropout or accent top signal conflict have taken place simultaneously.
The basic principle of the method for the invention is: utilize fft algorithm or DFT algorithm etc. to calculate the intensity at each light accent signal frequency place, top in a certain period; And strength range and the light of from the variation of intensity, the judging noise strength range when transferring the top signal to occur; Transfer the intensity at signal frequency place, top to analyze based on these two strength ranges to each light that calculates, to judge that this frequency is in a certain moment and whether has this frequency signal.
Concrete, a kind of method that the top signal is transferred in light modulation of separating provided by the invention, as shown in Figure 1, comprising:
Step S101, by the time period of setting, segmentation is calculated each light that receives and is transferred the intensity level at signal frequency place, top;
Each intensity level in each time period that step S102, utilization calculate is judged signal strength range and noise intensity scope that interior each light of each time period is transferred signal frequency place, top;
This step specifically comprises:
A plurality of intensity levels in each time period that utilization calculates are judged the distribution of each intensity level in each time period;
According to the signal modulation system of signal transmission source end, determine signal strength range and noise intensity scope in the distribution of each intensity level in each time period.
Step S103, each intensity level and the said strength range in the corresponding time period are mated, obtain the residing strength range of each intensity level after, demodulate the corresponding bit value of each intensity level.
This step specifically comprises:
Each intensity level and signal strength range in the corresponding time period and noise intensity scope are mated;
Based on the result of coupling, confirm that the residing strength range of each intensity level is signal strength range or is the noise intensity scope;
Based on the type of the said strength range of confirming, binding signal sends the modulation system of source end, obtains the corresponding bit value of each intensity level with said strength range coupling.
It is following to illustrate this step: establish the intensity level of determining a certain frequency f 1 and drop in the signal strength range; Because demodulating end can be known the modulation system of modulated terminal in advance, that is, demodulating end this moment is clear this frequency f 1 corresponding which kind of coded system; For example, frequency f1 carries bit information 1 during modulation; So after the type of confirming the residing strength range of intensity level, can obtain the pairing bit value of intensity level according to the modulation system of knowing in advance.
In addition, the method for the invention, preferably, and can also be according to the number of the strength range that marks off, whether diagnosis accidents such as accent top dropout or accent top signal conflict have taken place, and are specific as follows:
Wherein, When two scope numbers are not inconsistent; Based on preset alarm configuration outputting alarm information, specifically comprise: when the intensity value range number that obtains when statistics was less than the intensity value range number of signal transmission source end modulation, output light was transferred the warning information of top dropout; The intensity value range number that obtains when statistics is during more than the intensity value range number of signal transmission source end modulation, and output light is transferred the warning information of top signal conflict.
In sum, the method for the invention is according to the intensity level that calculates in every period; Judge whether the noise in this section period changes, and perhaps whether system changes when transmission, as; The operating state of certain equipment changes, or transfers problem such as top signal frequency conflict.If noise changes, then rejudge the noise scope of respectively transferring signal frequency place, top and the strength range of signal.
So, just need not transfer the corresponding relation between top signal frequency and the wavelength based on the frequency location and the redesign of intensity size of noise in the system.And, also can judge the bit information of respectively transferring signal frequency place, top to transfer the top signal to send accurately, and problems such as accent top dropout or accent top signal conflict whether occur.
Below in conjunction with accompanying drawing 2 to 9, provide several preferred embodiments of the method for the invention, and combine the description of embodiment is further provided the realization details of the method for the invention.
In the embodiment of the invention; The signal transmission source end sends light and transfers the frequency of top signal employing preferably to adopt noise profile situation frequency more stably; As shown in Figure 2; Be the possible noise profile condition diagram of certain frequency range, wherein f1～f2 frequency range noise ratio is more smooth, so the present invention preferably selects f1～f2 frequency range to transfer the frequency of top signal as loading light; As shown in Figure 3, be the another kind of possible noise profile condition diagram of certain frequency range, wherein the interval noise of the f3 in f1～f2 frequency range～f4 is given prominence to.At this moment, can the frequency that this f3～f4 is interval get rid of, relatively be used as the frequency that the top signal is transferred in loading to f1～f3 and f4～f2 in the flat frequency interval.
Certainly; Need to prove; Signal transmission source end of the present invention adopts more smooth frequency range as transferring just more excellent execution mode of top signal loading frequency; And and nisi execution mode, whether smooth the method for the invention can be got arbitrary section interval as the frequency of transferring the top signal on whole frequency band, do not receive noise spectrum restriction.
Embodiment one
In the embodiment of the invention, the modulation system that the signal transmission source end adopts is: frequency of utilization f1 is as bit information " 1 ", and frequency of utilization f2 is as bit information " 0 ", and the signal transmission source end loads light and transfers the sketch map of top signal frequency as shown in Figure 4.In the present embodiment, use f1 as bit information 1, f2 is used as bit information 0, is a kind of of numerous modulation systems, and the source end can adopt other modulation systems according to concrete application, and for example f1 is used as bit information 0 as bit information 1 when not having the top of accent frequency, or the like.
In the embodiment of the invention, when the light that receives modulation system as shown in Figure 4 is transferred top signal frequency information, separate the method that the top signal is transferred in light modulation, comprising:
In the present embodiment, establish the said time period, wherein, in certain time period, calculate each light that receives and transfer the intensity level at signal frequency place, top, promptly calculate the intensity level of the 6 bit frequency signals that receive for receiving the time value of 6 signals.
Certainly; Need to prove, in the present embodiment, just transfer the demodulating process of top signal to describe the light of a wavelength; In practical application, transmit a plurality of wavelength in an optical fiber, transfer the demodulation of top signal all to implement by the method for the invention for the light of each wavelength.
As shown in Figure 5, be the strength range sketch map of each frequency of obtaining, among this strength range figure, among the strength range figure for the f1 frequency, higher strength range representes that f1 transfers the strength range of top signal, lower strength range is represented the strength range of noise.Among the strength range figure for the f2 frequency, higher strength range representes that f2 transfers the strength range of top signal, and lower strength range is represented the strength range of noise.
Step 3 is confirmed the residing strength range of each intensity level in each time period, and based on the type of the strength range of confirming, obtains the corresponding bit value of each intensity level.
Because; Signal transmission source end shown in Figure 4 uses f1 to represent bit information " 1 " when signal is modulated; F2 representes bit information " 0 "; So the intensity of the f1 that calculates when receiving terminal is in the f1 signal strength range, and the intensity of f2 is in the noise intensity scope, can judge to receive " 1 "; When the intensity of the f1 that calculates is in the noise intensity scope, and the intensity of f2 is in the f2 signal strength range, can judge to receive " 0 ".Judge that with regard to the strength range of calculating capable of using the bit value that the source end sends still is " 0 " for " 1 " like this.
Embodiment two
In the embodiment of the invention, the modulation system that the signal transmission source end adopts is: frequency of utilization f1 representes when not having the top of accent frequency that as bit information " 1 " " 0 ", signal transmission source end load light and transfers the sketch map of top signal frequency as shown in Figure 6.
In the embodiment of the invention, when the light that receives modulation system as shown in Figure 6 is transferred top signal frequency information, separate the method that the top signal is transferred in light modulation, comprising:
In the present embodiment, establishing in the said time period is the time value that receives 6 signals, wherein, in certain time period, calculates each light that receives and transfers the intensity level at signal frequency place, top, be i.e. the intensity level of 6 signals that calculating receives.
As shown in Figure 7, be the strength range sketch map of each frequency of obtaining, among this strength range figure, higher strength range representes that f1 transfers the strength range of top signal, lower strength range is represented the strength range of noise.
Step 3 is confirmed the residing strength range of each intensity level in each time period, and based on the type of the strength range of confirming, obtains the corresponding bit value of each intensity level.
Because; Signal transmission source end shown in Figure 6 uses f1 to represent bit information " 1 " when signal is modulated; Do not have to transfer top frequency representation bit information " 0 ",, can judge to receive " 1 " so the intensity of the f1 that calculates when receiving terminal is in the f1 signal strength range; When the intensity of the f1 that calculates is in the noise intensity scope, can judge to receive " 0 ".What judge that the source end sends with regard to the intensity level that calculates capable of using like this still is " 0 " for " 1 ".
Embodiment three
The enforcement of present embodiment is prerequisite with above-mentioned arbitrary embodiment, is used for the strength range through obtaining, and judges whether to take place light and transfers the top dropout or transfer the top signal conflict, and is concrete:
In the present embodiment, suppose to utilize the foregoing description two said methods, the strength range at certain frequency place in continuous several time periods is added up, obtain the number that interior during this period of time strength range distributes.
As shown in Figure 8; For calculating the strength range that top signal frequency f1 is transferred in bright dipping in several periods continuously; By finding out that f1 signal strength values in this time period all is in the strength range among the figure; And according to signal transmission source end modulating rule; The frequency of f1 should not be in this section all to be same value (be source end can not send the long period connect " 1 " or " 0 ") in the period or to be in the same strength range, so can judge that during this period of time this light transfers signal frequency pairing light in top to transfer the top signal to take place to lose, also is that light transfers the wavelength of top signal correspondence to take place to lose.
As shown in Figure 9; For calculating the strength range that top signal frequency f1 is transferred in bright dipping in several periods continuously; In scheming, can find out that the frequency intensity level of f1 during this period of time is in three strength ranges, and according to signal transmission source end modulating rule; The accent top signal frequency of a wavelength correspondence of source end is when sending, and its strength range has only two (being respectively transmission 1 and the strength range of sending 0 o'clock correspondence).So these three scopes represent to have in the light path 2 or a plurality of same light to transfer top signal frequency stack and cause at present, reason possibly be that during this period of time this light transfers the pairing wavelength of top signal frequency that conflict has taken place.
Shown in figure 10, the present invention also provides a kind of device that the top signal is transferred in light modulation of separating, and comprising:
Intensity level computing module 1010 was used for by the time period of setting, and segmentation is calculated each light that receives and transferred the intensity level at signal frequency place, top;
Strength range acquisition module 1020 is used to utilize each intensity level in each time period that said intensity level computing module 1010 calculates, and judges signal strength range and noise intensity scope that each light in each time period is transferred signal frequency place, top;
Bit information acquisition module 1030 is used for each intensity level and the said strength range in the corresponding time period are mated, obtain the residing strength range of each intensity level after, demodulate the corresponding bit value of each intensity level.
Further, in the device according to the invention, strength range acquisition module 1020 specifically comprises:
Distribution is judged submodule 1021, is used to utilize a plurality of intensity levels in each time period that calculates, and judges the distribution of each intensity level in each time period;
Strength range is obtained submodule 1022, is used for the signal modulation system according to the signal transmission source end, determines signal strength range and noise intensity scope in the distribution of each intensity level in each time period.
Further, in the device according to the invention, bit information acquisition module 1030 specifically comprises:
Matched sub-block 1031 is used for each intensity level and signal strength range in the corresponding time period and noise intensity scope are mated;
Scope is confirmed submodule 1032, is used for the result based on coupling, confirms that the residing strength range of each intensity level is signal strength range or is the noise intensity scope;
Bit value is confirmed submodule 1033, is used for the type based on the said strength range of confirming, binding signal sends the modulation system of source end, obtains the corresponding bit value of each intensity level with said strength range coupling.
Preferably, device according to the invention also comprises:
Wherein, alarm module specifically comprises:
When loss of signal alarm submodule 1041, the intensity value range number that is used for obtaining in statistics were less than the intensity value range number of signal transmission source end modulation, output light was transferred the warning information of top dropout;
Signal conflict alarm submodule 1042, the intensity value range number that is used for obtaining in statistics are during more than the intensity value range number of signal transmission source end modulation, and output light is transferred the warning information of top signal conflict.
In sum; The method of the invention and device; Transfer the amplitude strength value on the signal frequency of top through repeatedly calculating each light; Realized transferring the strength range of the noise at signal frequency place, top to transfer the division of the strength range of top signal, and utilized the strength range of dividing to demodulate the bit value that carries on each light accent top signal frequency accurately with light to each light.
Simultaneously; The number of the existing scope of intensity level that the method for the invention and device can also calculate according to certain several time period; Judge whether to have taken place accent top dropout or transfer the top signal conflict; And then judge whether to exist wavelength to lose or accident such as wavelength conflict, realized the function of alarm.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. separate the method that the top signal is transferred in light modulation for one kind, it is characterized in that, comprising:
Steps A, by the time period of setting, segmentation is calculated each light that receives and is transferred the intensity level at signal frequency place, top;
Step B utilizes each intensity level in each time period that calculates, and judges the signal strength range and the noise intensity scope at each light accent signal frequency place, top in each time period;
Step C matees each intensity level and the said strength range in the corresponding time period, obtain the residing strength range of each intensity level after, demodulate the corresponding bit value of each intensity level.
2. the method for claim 1 is characterized in that, said step B specifically comprises:
A plurality of intensity levels in each time period that utilization calculates are judged the distribution of each intensity level in each time period;
According to the signal modulation system of signal transmission source end, determine signal strength range and noise intensity scope in the distribution of each intensity level in each time period.
3. the method for claim 1 is characterized in that, said step C specifically comprises:
Each intensity level and signal strength range in the corresponding time period and noise intensity scope are mated;
Based on the result of coupling, confirm that the residing strength range of each intensity level is signal strength range or is the noise intensity scope;
Based on the type of the said strength range of confirming, binding signal sends the modulation system of source end, obtains the corresponding bit value of each intensity level with said strength range coupling.
4. like claim 1 or 2 or 3 described methods, it is characterized in that said method also comprises:
Add up the number of the existing strength range of intensity level at each light accent signal frequency place, top in continuous a plurality of time period;
The strength range number of the corresponding frequencies of the strength range number of the corresponding frequencies that statistics is obtained and the modulation of signal transmission source end compares, when two scope numbers are not inconsistent, based on preset alarm configuration, outputting alarm information.
5. method as claimed in claim 4 is characterized in that, and is said when two scope numbers are not inconsistent, and based on preset alarm configuration outputting alarm information, specifically comprises:
When the intensity value range number that obtains when statistics was less than the intensity value range number of signal transmission source end modulation, output light was transferred the warning information of top dropout;
The intensity value range number that obtains when statistics is during more than the intensity value range number of signal transmission source end modulation, and output light is transferred the warning information of top signal conflict.
6. separate the device that the top signal is transferred in light modulation for one kind, it is characterized in that, comprising:
The intensity level computing module was used for by the time period of setting, and segmentation is calculated each light that receives and transferred the intensity level at signal frequency place, top;
The strength range acquisition module is used to utilize each intensity level in each time period that said intensity level computing module calculates, and judges signal strength range and noise intensity scope that each light in each time period is transferred signal frequency place, top;
The bit information acquisition module is used for each intensity level and the said strength range in the corresponding time period are mated, obtain the residing strength range of each intensity level after, demodulate the corresponding bit value of each intensity level.
7. device as claimed in claim 6 is characterized in that, said strength range acquisition module comprises:
Distribution is judged submodule, is used to utilize a plurality of intensity levels in each time period that calculates, and judges the distribution of each intensity level in each time period;
Strength range is obtained submodule, is used for the signal modulation system according to the signal transmission source end, determines signal strength range and noise intensity scope in the distribution of each intensity level in each time period.
8. device as claimed in claim 6 is characterized in that, said bit information acquisition module comprises:
Matched sub-block is used for each intensity level and signal strength range in the corresponding time period and noise intensity scope are mated;
Scope is confirmed submodule, is used for the result based on coupling, confirms that the residing strength range of each intensity level is signal strength range or is the noise intensity scope;
Bit value is confirmed submodule, is used for the type based on the said strength range of confirming, binding signal sends the modulation system of source end, obtains the corresponding bit value of each intensity level with said strength range coupling.
9. like claim 6 or 7 or 8 described devices, it is characterized in that said device also comprises:
Alarm module is used to add up the number that each interior light of continuous a plurality of time period is transferred the existing strength range of intensity level at signal frequency place, top; The strength range number of the corresponding frequencies of the strength range number of the corresponding frequencies that statistics is obtained and the modulation of signal transmission source end compares, when two scope numbers are not inconsistent, based on preset alarm configuration, outputting alarm information.
10. device as claimed in claim 9 is characterized in that, said alarm module specifically comprises:
When loss of signal alarm submodule, the intensity value range number that is used for obtaining in statistics were less than the intensity value range number of signal transmission source end modulation, output light was transferred the warning information of top dropout;
Signal conflict alarm submodule, the intensity value range number that is used for obtaining in statistics are during more than the intensity value range number of signal transmission source end modulation, and output light is transferred the warning information of top signal conflict.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110314092.7A CN102377485B (en) | 2011-10-17 | 2011-10-17 | Method and device for demodulating pilot-tone modulation signals |
| PCT/CN2012/073670 WO2012155715A1 (en) | 2011-10-17 | 2012-04-09 | Method and device for demodulating optical pilot tone signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN102638304A (en) * | 2012-03-26 | 2012-08-15 | 中兴通讯股份有限公司 | Method and system for avoiding noise frequency in optical network |
| CN102710323A (en) * | 2012-05-11 | 2012-10-03 | 中兴通讯股份有限公司 | Wavelength tag collision detection method and device, and wavelength tag receiving equipment |
| WO2012155715A1 (en) * | 2011-10-17 | 2012-11-22 | 中兴通讯股份有限公司 | Method and device for demodulating optical pilot tone signal |
| CN105606910A (en) * | 2014-11-21 | 2016-05-25 | 中兴通讯股份有限公司 | Circuit, device and method of detecting optical signal to noise ratio |
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| CN1581756A (en) * | 2003-08-06 | 2005-02-16 | 华为技术有限公司 | Optical modulating transmission method and system |
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| CN114726436A (en) * | 2022-03-18 | 2022-07-08 | 北京邮电大学 | Wavelength channel monitoring method and device for wavelength division multiplexing system |
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| CN115001592A (en) * | 2022-05-26 | 2022-09-02 | 江苏科大亨芯半导体技术有限公司 | Demodulation method and system for multi-carrier frequency top modulation |
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| Publication number | Publication date |
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| CN102377485B (en) | 2014-08-20 |
| WO2012155715A1 (en) | 2012-11-22 |
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