CN107666349A - The isometric property detection method of high-precision multi-path high speed data transmission link - Google Patents
The isometric property detection method of high-precision multi-path high speed data transmission link Download PDFInfo
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- CN107666349A CN107666349A CN201710729795.3A CN201710729795A CN107666349A CN 107666349 A CN107666349 A CN 107666349A CN 201710729795 A CN201710729795 A CN 201710729795A CN 107666349 A CN107666349 A CN 107666349A
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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
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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
- 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
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
-
- 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
- H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
- H04B10/0795—Performance monitoring; Measurement of transmission parameters
- H04B10/07953—Monitoring or measuring OSNR, BER or Q
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- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses a kind of isometric property detection method of high-precision multi-path high speed data transmission link, it comprises the following steps：(1) contrast signal and sampled signal of every transmission channel to be detected are gathered by oscillograph；(2) contrast signal collected and sampled signal are imported into data processor (3) data processor and extracts sampled signal and contrast signal corresponding to every transmission channel, calculated with reference to optical path difference；(4) data processor calculates the relative optical path difference of any two transmission channels；Again by the absolute value of obtained relative optical path difference compared with a reference value, evaluated with the data transfer uniformity to each transmission channel.The present invention, isometric property, the uniformity of each tunnel data transport in multi-channel high-speed data transmission link can accurately be detected, its measurement accuracy is high, it is applied widely, while the detection of the bit error rate is fully integrated therein, avoid secondary adjustment, operating efficiency is improved, reduces cost.
Description
Technical field
The present invention relates to fiber optic communication field, more particularly to a kind of isometric property of high-precision multi-path high speed data transmission link
Detection method.
Background technology
At present, in the data synchronization transmissions detection of multichannel, more methods using relevant optical coupling light-metering journey, this kind of side
Formula, because the optical coupling time is longer, cause institute's light-metering journey precision poor, so as to can not accurately measure the consistent of each channel data
Property, it is generally used for the scene of the slow data transmission not high to each tunnel data transport coherence request.Meanwhile prior art
In, the bit error rate and signal conformance of multichannel optical communication signal be detect respectively, it is necessary to relevant device, component it is secondary
Adjustment, the damage for easily causing the rapid wear original paper such as optical fiber waste.
The content of the invention
In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is that it is more to provide a kind of high accuracy
The isometric property detection method of passage high speed data transmission link.The multi-channel high-speed data that this method carries out high consistency synchronously passes
Defeated accurate detection, meanwhile, it is by the detection of the communication signal bit error rate and each tunnel data transport consistency detection effective integration
One, avoids secondary adjustment, improves operating efficiency, saved cost.
Pass through existing knowledge, it is ensured that the high consistency of each tunnel data transport, any two in all passages
Between the condition that need to meet of optical path difference it is as follows：
Wherein；Δ represents optical path difference, the c expression lighies velocity, and N represents code element number, and R represents message transmission rate, and A is to influence system
Number.Therefore ensure the uniformity of each channel data, it can be detected by accurate light path measurement.
In order to solve the above technical problems, the technical solution adopted by the present invention is：A kind of high-precision multi-path high-speed data passes
The isometric property detection method of transmission link, comprises the following steps：
(1) contrast signal and sampled signal of every transmission channel to be detected are gathered by oscillograph；
(2) contrast signal collected and sampled signal are imported into data processor, with the data to each transmission channel
Transmission uniformity is detected；
(3) data processor extracts sampled signal and contrast signal corresponding to every transmission channel, and calculates sampling letter
Optical path difference number between contrast signal, it is designated as with reference to optical path difference；
(4) any two transmission channels being calculated are remake difference operation by data processor with reference to optical path difference, are calculated
Obtain relative optical path difference；Again by the absolute value of obtained relative optical path difference compared with a reference value, with to each transmission channel
Data transfer uniformity is evaluated；If the absolute value of the relative optical path difference between any two in all transmission channels is not
More than a reference value, then judge that the data transfer of each transmission channel meets coherence request.
Preferably, in the step 1, the acquisition method of contrast signal and sampled signal specifically includes：Pass through Error Detector
Launch initial signal, the initial signal is divided into two-way, wherein directly inputting the oscillograph all the way, is gathered by the oscillograph
As final contrast signal；Another way forms sampled signal, the sampled signal after integral transmission channel to be detected
Two-way is further divided into, wherein directly inputting the oscillograph all the way, is gathered by the oscillograph as final sampled signal, it is another
Road returns to the Error Detector, synchronously detects the bit error rate of this transmission channel；Aforesaid operations are repeated, are treated so as to collect every
The contrast signal and sampled signal of the transmission channel of detection.
Preferably, in the step 1, the initial signal for being input to every transmission channel keeps identical, every transmission
The contrast signal of passage also all same.
Preferably, also include in the step 1：The oscillograph carries out the sampled signal collected and contrast signal
Compare, signal eye diagram is obtained, intuitively to be observed.
Preferably, in the step 3, every transmission channel of calculating includes with reference to the step of optical path difference：Data processing
Sampled signal and contrast signal corresponding to device i-th transmission channel of extraction, carry out letter to the sampled signal and contrast signal respectively
Number spectrum analysis, obtains sampled signal frequency spectrum and contrast signal frequency spectrum, takes respectively in sampled signal frequency spectrum intermediate frequency spectrum absolute value
Phase value at maximumThe phase value at maximum in contrast signal frequency spectrum intermediate frequency spectrum absolute valueAnd make difference,
Phase difference is calculatedI.e.The phase difference that will be obtainedBelow equation is substituted into, is calculated i-th
The reference optical path difference Δ of transmission channeli；
Wherein, λ is the wavelength in vacuum；I=1,2,3 ... .n, n represent transmission channel sum.
Preferably, the step 4 includes：Take the reference optical path difference Δ of any two transmission channelsiAnd ΔjMake difference operation,
That is i-th transmission channel and j-th strip transmission channel, obtain relative optical path difference Δij, i.e. Δij=Δi-Δj；Again by relative optical path
Poor ΔijCompared with a reference value, evaluated with the uniformity to each transmission channel data transfer；Wherein, a reference value is
Wherein, c represents the light velocity, and N represents code element number, and R represents message transmission rate, and A is influence coefficient；
If the absolute value of the relative optical path difference between any two in all transmission channels no more than a reference value,
I.e.Then judge that each transmission channel data transfer meets coherence request；
Wherein, i=1,2,3 ... .n, j=1,2,3 ... .n, and i ≠ j, n represent total transmission channel number.
Preferably, in the step 3, preliminary setting data processor extracts sampled signal corresponding to every transmission channel
With the sample frequency of contrast signal, and ensure every transmission channel sample frequency all same.
Preferably, the transmission channel includes electric amplifier, laser, intensity modulator, image intensifer, optical branching
Device, space optical path and photoelectric conversion module.
The beneficial effects of the invention are as follows：The isometric property detection side of high-precision multi-path high speed data transmission link of the present invention
Method, isometric property, the uniformity of each tunnel data transport in multi-channel high-speed data transmission link can accurately be detected, it is surveyed
Accuracy of measurement is high, applied widely, while the detection of the bit error rate is fully integrated therein, and avoids secondary adjustment, improves work effect
Rate, reduce cost.
Brief description of the drawings
Fig. 1 is the testing process letter of the isometric property detection method of high-precision multi-path high speed data transmission link of the present invention
Figure；
Fig. 2 is the handling process sketch of the data processor of the present invention.
Embodiment
With reference to embodiment, the present invention is described in further detail, to make those skilled in the art with reference to specification
Word can be implemented according to this.
It should be appreciated that such as " having ", "comprising" and " comprising " term used herein do not allot one or more
The presence or addition of individual other elements or its combination.
Pass through existing knowledge, it is ensured that the high consistency of each tunnel data transport, any two in all passages
Between the condition that need to meet of optical path difference it is as follows：
Wherein；Δ represents optical path difference, the c expression lighies velocity, and N represents code element number, and R represents message transmission rate, and A is to influence system
Number.Therefore ensure the uniformity of each channel data, it can be detected by accurate light path measurement.
A kind of isometric property detection method of high-precision multi-path high speed data transmission link of the present embodiment, it is characterised in that
Comprise the following steps：
(1) contrast signal and sampled signal of every transmission channel to be detected are gathered by oscillograph；
Initial signal is launched by Error Detector, the initial signal is divided into two-way, wherein directly inputting the oscillography all the way
Device, gathered by the oscillograph as final contrast signal；Another way is formed after integral transmission channel to be detected and adopted
Sample signal, the sampled signal are further divided into two-way, wherein directly inputting the oscillograph all the way, conduct is gathered by the oscillograph
Final sampled signal, and the sampled signal collected and contrast signal are compared the oscillograph, obtain signal eye diagram,
So that operating personnel are intuitively observed；Another way sampled signal returns to the Error Detector, synchronously detects this transmission channel
The bit error rate, to judge the data transfer accuracy of transmission channel；
Aforesaid operations are repeated, so as to collect the contrast signal and sampled signal of every transmission channel to be detected.
Wherein, the initial signal for being input to every transmission channel keeps identical, due to the reference letter of every transmission channel
Number it is the initial signal of every transmission channel, so the contrast signal of every transmission channel also all same.
Wherein, it is (preceding to include electric amplifier, laser, intensity modulator, image intensifer, optical branching device for the transmission channel
End band collimater), space optical path and photoelectric conversion module.
(2) contrast signal collected and sampled signal are imported into data processor, with the data to each transmission channel
Transmission uniformity is detected；
(3) data processor extracts sampled signal and contrast signal corresponding to every transmission channel, and calculates sampling letter
Optical path difference number between contrast signal, it is designated as with reference to optical path difference；
Calculate including with reference to the step of optical path difference for every transmission channel：Data processor extracts i-th transmission channel pair
The sampled signal and contrast signal answered, signal spectral analysis is carried out to the sampled signal and contrast signal respectively, obtain sampling letter
Number frequency spectrum and contrast signal frequency spectrum, maximum in sampled signal frequency spectrum intermediate frequency spectrum absolute value are taken respectively, in contrast signal frequency spectrum
At maximum in absolute spectra, then the phase value at the maximum in sampled signal frequency spectrum intermediate frequency spectrum absolute value is taken respectivelyThe phase value at maximum in contrast signal frequency spectrum intermediate frequency spectrum absolute valueAnd make difference, phase difference is calculatedI.e.The phase difference that will be obtainedBelow equation is substituted into, the reference of i-th transmission channel is calculated
Optical path difference Δi；
Wherein, λ is the wavelength in vacuum；I=1,2,3 ... .n, n represent transmission channel sum.
Wherein, preliminary setting data processor extracts the sampling of sampled signal and contrast signal corresponding to every transmission channel
Frequency, and ensure to carry out every transmission channel the sample frequency all same of signal extraction, to eliminate interference.
Wherein, in signal spectral analysis, sampled signal and contrast signal are handled to obtain sampled signal using Fourier transform
Frequency spectrum and contrast signal frequency spectrum.
(4) any two transmission channels being calculated are remake difference operation by data processor with reference to optical path difference, are calculated
Obtain relative optical path difference；Again by the absolute value of obtained relative optical path difference compared with a reference value, with to each transmission channel
Data transfer uniformity is evaluated；If the absolute value of the relative optical path difference between any two in all transmission channels is not
More than a reference value, then judge that the data transfer of each transmission channel meets coherence request.
Concretely comprise the following steps：Take the reference optical path difference Δ of any two transmission channelsiAnd ΔjMake difference operation, obtain relative optical path
Poor Δij, i.e. Δij=Δi-Δj；Again by relative optical path difference ΔijCompared with a reference value, with to each transmission channel data transfer
Uniformity evaluated；Wherein, a reference value is
Wherein, c represents the light velocity, and N represents code element number, and R represents message transmission rate, and A is influence coefficient；
If the absolute value of the relative optical path difference between any two in all transmission channels no more than a reference value,
I.e.Then judge that each transmission channel data transfer meets coherence request；
Wherein, i=1,2,3 ... .n, j=1,2,3 ... .n, and i ≠ j, n represent total transmission channel number.
Due to the contrast signal all same of every transmission channel, using identical contrast signal adopting as every transmission channel
The contrast benchmark of sample signal, calculate the reference optical path difference of every transmission channel, then the reference light by any two transmission channels
Path difference makees difference operation (influence that contrast signal is eliminated by making difference operation), calculates the relative of any two transmission channels
Optical path difference, then by the relative optical path difference compared with a reference value, evaluated with the uniformity to each transmission channel data transfer.With
Precisely detect the isometric property of each tunnel data transport in multi-channel high-speed data synchronous transfer, whether uniformity meets requires.
The present invention detects the uniformity of each transmission channel data transfer, while integrated Error Detector by accurate light path survey calculation, together
Step carries out data transmission the detection of accuracy.
In another embodiment, Error Detector is changed to other signals emission source, and Error Detector is independent, receives letter respectively
The signal of number emission source and the signal by communicating light path, so as to obtain the corresponding bit error rate.
Fig. 1 shows the testing process of the isometric property detection method of high-precision multi-path high speed data transmission link of the present invention
Sketch, Fig. 2 show the handling process sketch of the data processor of the present invention.In order to the understanding of the present invention.
Although embodiment of the present invention is disclosed as above, it is not restricted in specification and embodiment listed
With it can be applied to various suitable the field of the invention completely, can be easily for those skilled in the art
Other modification is realized, therefore under the universal limited without departing substantially from claim and equivalency range, it is of the invention and unlimited
In specific details.
Claims (8)
1. a kind of isometric property detection method of high-precision multi-path high speed data transmission link, it is characterised in that comprise the following steps：
(1) contrast signal and sampled signal of every transmission channel to be detected are gathered by oscillograph；
(2) contrast signal collected and sampled signal are imported into data processor, with the data transfer to each transmission channel
Uniformity is detected；
(3) data processor extracts sampled signal and contrast signal corresponding to every transmission channel, and calculate the sampled signal and
Optical path difference between contrast signal, it is designated as with reference to optical path difference；
(4) any two transmission channels being calculated are remake difference operation by data processor with reference to optical path difference, are calculated
Relative optical path difference；Again by the absolute value of obtained relative optical path difference compared with a reference value, with the data to each transmission channel
Transmission uniformity is evaluated；If the absolute value of the relative optical path difference between any two in all transmission channels no more than
The a reference value, then judge that the data transfer of each transmission channel meets coherence request.
2. the isometric property detection method of high-precision multi-path high speed data transfer passage according to claim 1, its feature exist
In in the step 1, the acquisition method of contrast signal and sampled signal specifically includes：Initial signal, institute are launched by Error Detector
State initial signal and be divided into two-way, wherein directly inputting the oscillograph all the way, gathered by the oscillograph as final reference
Signal；Another way forms sampled signal after integral transmission channel to be detected, and the sampled signal is further divided into two-way, wherein
The oscillograph is directly inputted all the way, is gathered by the oscillograph as final sampled signal, another way returns to the mistake
Code instrument, synchronously detect the bit error rate of this transmission channel；Aforesaid operations are repeated, so as to collect every transmission channel to be detected
Contrast signal and sampled signal.
3. the isometric property detection method of high-precision multi-path high speed data transfer passage according to claim 2, its feature exist
In in the step 1, the initial signal for being input to every transmission channel keeps identical, the contrast signal of every transmission channel
Also all same.
4. the isometric property detection method of high-precision multi-path high speed data transfer passage according to claim 2, its feature exist
In also including in the step 1：The sampled signal collected and contrast signal are compared the oscillograph, obtain signal
Eye pattern, intuitively to be observed.
5. the isometric property detection method of high-precision multi-path high speed data transfer passage according to claim 2, its feature exist
In in the step 3, every transmission channel of calculating includes with reference to the step of optical path difference：Data processor extracts i-th transmission
Sampled signal corresponding to passage and contrast signal, signal spectral analysis is carried out to the sampled signal and contrast signal respectively, obtained
Sampled signal frequency spectrum and contrast signal frequency spectrum, the phase value at the maximum in sampled signal frequency spectrum intermediate frequency spectrum absolute value is taken respectivelyThe phase value at maximum in contrast signal frequency spectrum intermediate frequency spectrum absolute valueAnd make difference, phase difference is calculatedI.e.The phase difference that will be obtainedBelow equation is substituted into, the reference of i-th transmission channel is calculated
Optical path difference Δi；
Wherein, λ is the wavelength in vacuum；I=1,2,3 ... .n, n represent transmission channel sum.
6. the isometric property detection method of high-precision multi-path high speed data transfer passage according to claim 5, its feature exist
In the step 4 includes：Take the reference optical path difference Δ of any two transmission channelsiAnd ΔjMake difference operation, i.e., i-th transmission is logical
Road and j-th strip transmission channel, obtain relative optical path difference Δij, Δij=Δi-Δj；Again by relative optical path difference ΔijEnter with a reference value
Row compares, and is evaluated with the uniformity to each transmission channel data transfer；
Wherein, a reference value is
Wherein, c represents the light velocity, and N represents code element number, and R represents message transmission rate, and A is influence coefficient；
If the absolute value of the relative optical path difference between any two in all transmission channels is no more than a reference value, i.e.,Then judge that each transmission channel data transfer meets coherence request；
Wherein, i=1,2,3 ... .n, j=1,2,3 ... .n, and i ≠ j, n represent total transmission channel number.
7. the isometric property detection method of high-precision multi-path high speed data transfer passage according to claim 1, its feature exist
In in the step 3, preliminary setting data processor extracts adopting for sampled signal corresponding to every transmission channel and contrast signal
Sample frequency, and ensure the sample frequency all same of every transmission channel.
8. the isometric property detection method of high-precision multi-path high speed data transfer passage according to claim 1, its feature exist
In the transmission channel includes electric amplifier, laser, intensity modulator, image intensifer, optical branching device, space optical path and light
Electric modular converter.
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| CN107666349B (en) | 2020-07-28 |
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