CN107147441A - The detection method and device of signal - Google Patents
The detection method and device of signal Download PDFInfo
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- CN107147441A CN107147441A CN201710300144.2A CN201710300144A CN107147441A CN 107147441 A CN107147441 A CN 107147441A CN 201710300144 A CN201710300144 A CN 201710300144A CN 107147441 A CN107147441 A CN 107147441A
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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
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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
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/114—Indoor or close-range type systems
- H04B10/116—Visible light communication
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Abstract
The embodiments of the invention provide a kind of detection method and device of signal, applied to visible optical communication, methods described includes：Line translation is entered to the first signal that photon detector is exported, the secondary signal of Gaussian distributed is obtained；Multiple former transmission signals corresponding to first signal are obtained, the estimation signal of each former transmission signal are calculated, to determine the decision rule made decisions to the secondary signal；Wherein, multiple former transmission signals corresponding to first signal belong to the constellation set of default constellation structures；According to the decision rule, the secondary signal is made decisions, to obtain the corresponding estimation signal of the secondary signal, by the corresponding former transmission signal of the estimation signal of acquisition, the former transmission signal of first signal is used as.The technical scheme of the embodiment of the present invention, realizes and carries out effective detection to the first signal for obeying Poisson distribution, improve visible light communication system performance, reduce the bit error rate of signal detection.
Description
Technical field
The present embodiments relate to design method and device, the letter of communication technical field, more particularly to a kind of constellation structures
Number detection method and device.
Background technology
It is used as a kind of emerging mode of radio communication, it is seen that optic communication (Visible Light Communication,
VLC) developed rapidly the advantages of the frequency spectrum resource of its environmental protection, controllable communication range, the transmission speed of high speed.
VLC systems include optical signal launch part and optical signal receiving portion, wherein, optical signal launch part is by electric signal
Rear carrier frequency is modulated to light emitting diode (Light-Emitting Diode, LED) light fixture, is sent by LED lamp
Visible ray carries out signal transmission, and the optical signal received is converted to electric signal by optical signal receiving portion by photon detector,
Then the electric signal being converted to based on preset constellation detect and obtain the corresponding former transmission signal of electric signal.Due to photoelectricity
Diode (Photon-Diode, PD) detection mode sensitivity is not high, and the transmission range of VLC systems is constrained significantly, therefore existing
Have in technology, commonly use single-photon avalanche diode (Single Photon Avalanche Diode, SPAD) as reception hand
Section, senses incident optical signal, a snowslide occurs to be considered as a photon counting, due to photon detector using avalanche effect
Object of observation is photon, therefore, and the electric signal that photon detector is converted to introduces the randomness of particle so that electric signal
Transmission channel is changed into Poisson channel, that is to say, that the electric signal of photon detector output obeys Poisson distribution.When transmission signal work(
Channel quality is poorer when rate is bigger, it is seen that optical communication system performance is also affected.
Therefore, a kind of detection method for the signal that can adapt to Poisson channel is needed badly, to improve visible light communication system
Performance, reduces the bit error rate of signal detection.
The content of the invention
The embodiment of the present invention provides a kind of detection method and device of signal, realizes the first letter to obeying Poisson distribution
Number effectively detected, improve visible light communication system performance, reduce the bit error rate of signal detection.
The embodiment of the present invention provides a kind of detection method of signal, and applied to visible optical communication, methods described includes：
Line translation is entered to the first signal that photon detector is exported, the secondary signal of Gaussian distributed is obtained；Wherein, institute
It is the signal that the photon detector is exported according to the former transmission signal received to state the first signal；
Multiple former transmission signals corresponding to first signal are obtained, the estimation signal of each former transmission signal is calculated,
To determine the decision rule made decisions to the secondary signal；Wherein, multiple corresponding to first signal primary penetrate letter
Number belong to the constellation set of default constellation structures；
According to the decision rule, the secondary signal is made decisions, to obtain the corresponding estimation of the secondary signal
Signal, by the corresponding former transmission signal of the estimation signal of acquisition, is used as the former transmission signal of first signal.
The embodiment of the present invention also provides a kind of detection means of signal, and applied to visible optical communication, described device includes：
Modular converter, the first signal for being exported to photon detector enters line translation, obtains the of Gaussian distributed
Binary signal；Wherein, first signal is the signal that the photon detector is exported according to the original signal received；
Processing module, for obtaining multiple former transmission signals corresponding to first signal, calculating is each primary to penetrate letter
Number estimation signal, to determine the decision rule made decisions to the secondary signal；Wherein, corresponding to first signal
Multiple former transmission signals belong to the constellation set of default constellation structures；
Judging module, for according to the decision rule, being made decisions to second electric signal, to obtain described second
The corresponding estimation signal of electric signal, by the corresponding former transmission signal of the estimation signal of acquisition, is used as the primary of first signal
Penetrate signal.
The detection method and device of the signal of the embodiment of the present invention, are carried out by the first signal exported to photon detector
Conversion, obtains the secondary signal of Gaussian distributed, and obtains multiple former transmission signals corresponding to the first signal, calculates each
The estimation signal of former transmission signal, with after determining the decision rule made decisions to secondary signal, according to decision rule, to
Binary signal makes decisions, to obtain the corresponding estimation signal of secondary signal, by the corresponding former transmission signal of the estimation signal of acquisition,
As the former transmission signal of the first signal, realize and effective detection is carried out to the first signal for obeying Poisson distribution, improve
Visible light communication system performance, reduces the bit error rate of signal detection.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes the embodiment of the present invention
A part, the schematic description and description of the embodiment of the present invention is used to explain the embodiment of the present invention, does not constitute to this hair
The improper restriction of bright embodiment.In the accompanying drawings：
Fig. 1 is the flow chart of the detection method embodiment one of the signal of the embodiment of the present invention；
Fig. 2 is K=10, during L=2, presets the structural representation of the constellation set of constellation structures；
When Fig. 3 is K=4,5,6, L=3, the structural representation of the constellation set of constellation structures is preset；
Fig. 4 is the flow chart of the detection method embodiment two of the signal of the embodiment of the present invention；
Fig. 5 is the constellation structures schematic diagram of multiple original transmitted signals under 2D signal；
Fig. 6 is the constellation structures schematic diagram of the corresponding estimation signals of Fig. 5；
The court verdict schematic diagram of Fig. 7 secondary signals；
Fig. 8 is the structural representation of the detection means embodiment one of the signal of the embodiment of the present invention；
Fig. 9 is the structural representation of the detection means embodiment two of the signal of the embodiment of the present invention.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
Technical scheme of the embodiment of the present invention is clearly and completely described for specific embodiment and corresponding accompanying drawing.Obviously, it is described
Embodiment is only a part of embodiment of the embodiment of the present invention, rather than whole embodiments.Based on the reality in the embodiment of the present invention
Example is applied, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made all belongs to
The scope protected in the embodiment of the present invention.
The (if present)s such as term " first ", " second " in specification and claims and above-mentioned accompanying drawing are to be used for area
Not similar part, without for describing specific order or precedence.It should be appreciated that the data so used are appropriate
In the case of can exchange, so that embodiments herein described herein can be real with the order in addition to illustrating herein
Apply.
Below in conjunction with accompanying drawing, the technical scheme that each embodiment of the embodiment of the present invention is provided is described in detail.
Embodiment one
Fig. 1 is the flow chart of the detection method embodiment one of the signal of the embodiment of the present invention, as shown in figure 1, the present invention is real
The detection method of the signal of example is applied, specifically be may include steps of：
100th, line translation is entered to the first signal that photon detector is exported, obtains the secondary signal of Gaussian distributed.
During one implements, the first signal is that photon detector is exported according to the former transmission signal received
Signal.Specifically, electric signal is modulated rear carrier frequency to emitting led light fixture by optical signal launch part, passes through LED lamp
Visible light signal is sent as former transmission signal, is received after channel transmission by the photon detector of optical signal receiving portion, and
Export the first signal.
Specifically, any L dimensional signals are launched in optical signal launch partIt is final by optical signal acceptance division after channel transmission
The photon detector divided is received, and forms the first signalWherein, because photon counting process is standard counting process, so's
Each component obeys Poisson distribution, can be expressed as formula (1)：
Wherein, constant α and β represent SPAD gain and the interior photon as caused by dark counting of a symbol period respectively
Number,It is constant for the shot-noise in SPAD, 1, L × 1 represents that L rows 1 are arranged.
In order to more accurately be detected to the first signal, the embodiment of the present invention needs that the of Poisson distribution will be obeyed
One signalBe converted to the secondary signal of Gaussian distributedSpecifically, the first signal that photon detector can be exportedEnter
Row Anscombe is converted, and obtains the secondary signal of Gaussian distributedIts corresponding transformation for mula is：
101st, multiple former transmission signals corresponding to first signal are obtained, the estimation letter of each former transmission signal is calculated
Number, to determine the decision rule made decisions to the secondary signal.
After the transmission of former transmission signal channel, the first signal exported by photon detector obeys Poisson distribution, meeting
Make the corresponding former transmission signal of the signal of confirmation first more complicated, and the bit error rate is higher, accordingly, it would be desirable to by optical signal acceptance division
The signal detector divided determines the corresponding former transmission signal of the first signal of photon detector output, in order to improve signal detector
Accuracy rate, reduce the bit error rate, the embodiment of the present invention can be defeated to photon detector according to the constellation set of default constellation structures
The first signal gone out is detected.Wherein, multiple former transmission signals corresponding to the first signal belong to the star of default constellation structures
Seat set.
During one implements, in bit error rate performance (minimum Hailin lattice distance) no
How the use of minimum energy to be constellation structures key issue in the case of change, for the problem, the embodiment of the present invention is devised
Each former transmission signal is by square number structure in a kind of constellation set of default constellation structures, the constellation set of the default constellation structures
Into, and each former transmission signal is acquired successively according to the order of general power from low to high.
Specifically, the constellation set of the default constellation structures in the embodiment of the present invention is by 2KIndividual constellation point is constituted, and wherein K >=
1, and K is integer, constellation point is corresponding with former transmission signal.I-th of constellation point can be expressed as
si=(si1, si2..., sil...siL)T, and
Wherein, niFor the general power of the corresponding former transmission signal of i-th of constellation, L is the constellation set of default constellation structures
Dimension.For example, in a visible light communication system, exist many former transmission signals (0,0,0), (0,1,0), (0,0,1),
(1,0,0), (0,1,1), (1,1,0), (1,0,1) ... etc., if needing to construct K=2 in the embodiment of the present invention, L=3's is pre-
If the constellation set of constellation structures, then the constellation set of constellation structures is preset in the embodiment of the present invention includes 4 former transmission signals,
Now need to choose (0,0,0), (0,1,0), (0,0,1) and (1,0,0) this 4 original transmission signals, and can not choose (0,1,
1), (1,1,0), (1,0,1) ... one or more of, so as to meet using minimum energy construction constellation structures
Constellation set.
Fig. 2 is K=10, during L=2, presets the structural representation of the constellation set of constellation structures, and Fig. 3 is K=4,5,6, L
When=3, the structural representation of the constellation set of constellation structures is preset.As shown in Figures 2 and 3, the former transmission signal selected by it
Selected according to above-mentioned related record, and construct the constellation set of corresponding default constellation structures.Implemented at one
Cheng Zhong, the embodiment of the present invention can know the general power of each former transmission signal in the power and constellation of the first signal, due to
First signal may be a transmitting in multiple former transmission signals, therefore, it can the power and star according to the first signal
The general power of each former transmission signal in seat, it is determined that the general power of the multiple former transmission signals close with the power of the first signal,
These former transmission signals are got from the constellation set of default constellation structures, and calculate the estimation letter of each former transmission signal
Number, specifically, it can be calculated according to equation below：
Wherein, J is the number for the multiple former transmission signals chosen, and J is the integer more than or equal to 2.
After the estimation signal of each former transmission signal is calculated, it may be determined that the judgement that secondary signal makes decisions is accurate
Then, for example, with secondary signal with estimating the distance between signal value for judgment criterion etc..
102nd, according to the decision rule of determination, secondary signal is made decisions, believed with obtaining the corresponding estimation of secondary signal
Number, by the corresponding former transmission signal of the estimation signal of acquisition, it is used as the former transmission signal of the first signal.
It is determined that after decision rule, can be made decisions to secondary signal, for example, secondary signal and estimation can be calculated
The distance between signal is worth, and the secondary signal estimation signal minimum with estimating the distance between signal value is obtained, by estimating for acquisition
Count signal output, and using its corresponding former transmission signal as the first signal former transmission signal.
Specifically, the corresponding estimation signal of secondary signal can be obtained according to below equation：
Utilize above-mentioned formula secondary signalWith estimation signalThe distance between detected, and obtain a most narrow spacing
From value, the estimation signal corresponding to lowest distance value is now chosen.
The executive agent of the detection method of the signal of the embodiment of the present invention can be the detection means of signal, the inspection of the signal
Survey device specifically can come integrated by software, and the detection means of such as signal is specifically as follows an application, of the invention right
This is without being particularly limited to.
The detection method of the signal of the embodiment of the present invention, line translation is entered by the first signal exported to photon detector,
The secondary signal of Gaussian distributed is obtained, and obtains multiple former transmission signals corresponding to the first signal, calculates each primary
The estimation signal of signal is penetrated, after determining the decision rule made decisions to secondary signal, according to decision rule, to believe second
Number make decisions, to obtain the corresponding estimation signal of secondary signal, by the corresponding former transmission signal of the estimation signal of acquisition, as
The former transmission signal of first signal, realizes and carries out effective detection to the first signal for obeying Poisson distribution, improve visible
Optical communication system performance, reduces the bit error rate of signal detection.
Embodiment two
Fig. 4 is the flow chart of the detection method embodiment two of the signal of the embodiment of the present invention, as shown in figure 4, the present invention is real
The detection method of signal of example is applied on the basis of embodiment illustrated in fig. 1, further in further detail to technical solution of the present invention
It is described.
As shown in figure 4, the detection method of the signal of the embodiment of the present invention, specifically may include steps of：
400th, line translation is entered to the first signal that photon detector is exported, obtains the secondary signal of Gaussian distributed.
401st, obtain between multiple former transmission signals corresponding to the first signal, the former transmission signal of detection any two away from
From value.
Can be so that the performance of optical signal receiving portion is by secondary signal and estimation signal in the embodiment of the present invention by formula (5)
The distance between determine, it follows that the distance between former transmission signal of any two in the constellation set of default constellation structures
Determine the performance of optical signal receiving portion.Therefore, can be with after multiple former transmission signals corresponding to the first signal are got
Detect the distance between the former transmission signal of any two value.
402nd, compare the size of the distance between the former transmission signal of any two value, obtain the first comparative result.
403rd, the lowest distance value in the first comparative result is obtained.
During one implements, the performance of optical signal receiving portion between the former transmission signal of any two away from
Determined from distance value minimum in value, therefore, it can obtain the distance between former transmission signal of any two according to equation below
Minimum distance value in value：
Wherein, s1And s2The respectively former transmission signal of any two.It can be obtained any two under each dimension by above-mentioned formula
Lowest distance value between individual former transmission signal.
It should be noted that due to the former transmission signal in the constellation structures in the embodiment of the present invention be according to general power by
Low to high order is acquired successively, and it is necessarily included in (0,0,0) and (0,1,0), (0,0,1) and (1,0,0) extremely
Few one, so lowest distance value is 1 between any two original transmission signal in the embodiment of the present invention, meet minimum Hailin lattice away from
From demand.
404th, according to default calculation formula, the estimation signal of each former transmission signal is calculated.
Specifically, the estimation signal of each former transmission signal can be calculated according to formula (4).
405th, the lowest distance value in the first comparative result, the adjacent estimation signal of any two is carried out equidistant
Arrangement, obtain estimating signal at equal intervals.
During one implements, the first signal of photon detector output obeys Poisson distribution, and its power is bigger,
Noise is bigger, and adjacent signals are more easily obscured, therefore in order to offset noise, makes adjacent signals be difficult to obscure, photon detector is defeated
The distance that the first signal gone out is arranged in constellation structures be it is non-power is bigger at equal intervals, the distance between two signals are more
Greatly, in order to the corresponding original signal of the first signal of accurate detection photon detector output, the embodiment of the present invention is with the first ratio
On the basis of the lowest distance value in result, the adjacent estimation signal of any two is arranged at equal intervals, between being waited
Away from estimation signal, formed a new constellation structures.
406th, according to estimation signal at equal intervals, the decision rule made decisions to secondary signal is set.
First signal of photon detector output is converted into after secondary signal to fall by estimating signal shape at equal intervals
Into new constellation structures in, can now be set according to the new constellation structures of equidistant estimation signal formation to second
The decision rule that signal makes decisions, for example, the judgment criterion set as the second electric signal distance estimations signal be judgement recently
Criterion.
407th, the second electric signal of detection estimates the distance between signal value with each.
After the second electric signal falls in the new constellation structures of estimation signal formation at equal intervals, the second telecommunications can be detected
Number with the distance between each estimation signal value.
408th, compare the second electric signal and each size for estimating the distance between signal value, obtain the second comparative result.
409th, the corresponding estimation signal of lowest distance value in the second comparative result is obtained.
The corresponding estimation signal of lowest distance value in the second comparative result can be obtained according to above-mentioned formula (5).
410th, by the corresponding former transmission signal of the estimation signal of acquisition, it is used as the former transmission signal of the first signal.
After the corresponding estimation signal of the lowest distance value in obtaining the second comparative result, you can to know that the estimation is believed
Number corresponding former transmission signal, and then or the first signal former transmission signal.
The embodiment of the present invention is realized carries out effective detection to the first signal for obeying Poisson distribution, improves visible ray
Communication system performance, reduces the bit error rate of signal detection.
Technical scheme is described by taking 2D signal as an example below：
Fig. 5 is the constellation structures schematic diagram of multiple original transmitted signals under 2D signal, and Fig. 6 is the corresponding estimation letters of Fig. 5
Number constellation structures schematic diagram, the court verdict schematic diagram of Fig. 7 secondary signals.
As shown in figure 5, the present embodiment is with s1-s8Exemplified by former transmission signal, each non-equidistant arrangement of former transmission signal, such as
Fig. 5 can be seen that any former transmission signal s3, former transmission signal s4, former transmission signal s6Former transmission signal s7Between it is square
Structure, and be the distance between the former transmission signal of any two minimum distance value of value, therefore, will on the basis of this distance value
Estimation signal is obtained after calculating former transmission signal equidistantly to be changed, and obtains constellation structures as shown in Figure 6.As schemed
Shown in 7, the secondary signal of generation after the first signal r of photon detector output is convertedWhen being output, fall in estimation signalIt is interior, it can now detect secondary signalWith estimation signalThe distance between value it is minimum, now output estimation signal
And then obtain corresponding former transmission signal s5, and then can determine that the corresponding former transmission signal of the first signal is s5。
Embodiment three
Fig. 8 is the structural representation of the detection means embodiment one of the signal of the embodiment of the present invention, and it is applied to visible ray
Communication, as shown in figure 8, the detection means of the signal of the embodiment of the present invention can include modular converter, processing module and judgement mould
Block.
Modular converter, the first signal for being exported to photon detector enters line translation, obtains the of Gaussian distributed
Binary signal.
Wherein, the first signal is the signal that photon detector is exported according to the original signal received.
Processing module, for obtaining multiple former transmission signals corresponding to the first signal, calculates each former transmission signal
Signal is estimated, to determine the decision rule made decisions to secondary signal.
Wherein, multiple former transmission signals corresponding to the first signal belong to the constellation set of default constellation structures, and this is preset
Each original transmission signal is made up of square number in the constellation set of constellation structures, and each former transmission signal be according to general power by
Low to high order is acquired successively.
Judging module, it is corresponding to obtain the second electric signal for according to decision rule, being made decisions to the second electric signal
Estimate signal, by the corresponding former transmission signal of the estimation signal of acquisition, be used as the former transmission signal of the first signal.
The detection means of the signal of the embodiment of the present invention, the realization mechanism for detecting signal is realized by using above-mentioned each module
It is identical with the realization mechanism of above-mentioned embodiment illustrated in fig. 1, the record of above-mentioned embodiment illustrated in fig. 1 is may be referred in detail, herein not
Repeat again.
The detection means of the signal of the embodiment of the present invention, can be exported by using above-mentioned each module to photon detector
First signal enters line translation, obtains the secondary signal of Gaussian distributed, and multiple primary penetrating of obtaining corresponding to the first signal
Signal, calculates the estimation signal of each former transmission signal, with after determining the decision rule made decisions to secondary signal, according to
Decision rule, makes decisions to secondary signal, to obtain the corresponding estimation signal of secondary signal, by the estimation signal correspondence of acquisition
Former transmission signal, as the former transmission signal of the first signal, realize the first signal for obeying Poisson distribution is carried out it is effective
Detection, improve visible light communication system performance, reduce the bit error rate of signal detection.
Example IV
Fig. 9 is the structural representation of the detection means embodiment two of the signal of the embodiment of the present invention, as shown in figure 9, this hair
The detection means of the signal of bright embodiment can also include detection module on the basis of embodiment illustrated in fig. 8, further, compare
Module and acquisition module.
Detection module, for detecting the distance between the former transmission signal of any two value；
Comparison module, the size for comparing the distance between the former transmission signal of any two value, obtains first and compares knot
Really；
Acquisition module, for obtaining the lowest distance value in the first comparative result.
During one implements, processing module, specifically for：
According to default calculation formula, the estimation signal of each former transmission signal is calculated；
According to the lowest distance value in the first comparative result, the adjacent estimation signal of any two is arranged at equal intervals
Row, obtain estimating signal at equal intervals；
According to equidistant estimation signal, the decision rule made decisions to secondary signal is set.
Judging module, specifically for：
Detect that the second electric signal estimates the distance between signal value with each；
Compare the second electric signal and each size for estimating the distance between signal value, obtain the second comparative result；
Obtain the corresponding estimation signal of lowest distance value in the second comparative result.
The detection means of the signal of the embodiment of the present invention, the realization mechanism for detecting signal is realized by using above-mentioned each module
It is identical with the realization mechanism of above-mentioned embodiment illustrated in fig. 4, the record of above-mentioned embodiment illustrated in fig. 4 is may be referred in detail, herein not
Repeat again.
It should be understood by those skilled in the art that, embodiments of the invention can be provided as method, system or computer program
Product.Therefore, the present invention can be using the reality in terms of complete hardware embodiment, complete software embodiment or combination software and hardware
Apply the form of example.Moreover, the present invention can be used in one or more computers for wherein including computer usable program code
The computer program production that usable storage medium is implemented on (including but is not limited to magnetic disk storage, CD-ROM, optical memory etc.)
The form of product.
The present invention is the flow with reference to method according to embodiments of the present invention, equipment (system) and computer program product
Figure and/or block diagram are described.It should be understood that can be by every first-class in computer program instructions implementation process figure and/or block diagram
Journey and/or the flow in square frame and flow chart and/or block diagram and/or the combination of square frame.These computer programs can be provided
The processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce
A raw machine so that produced by the instruction of computer or the computing device of other programmable data processing devices for real
The device for the function of being specified in present one flow of flow chart or one square frame of multiple flows and/or block diagram or multiple square frames.
These computer program instructions, which may be alternatively stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory, which is produced, to be included referring to
Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one square frame of block diagram or
The function of being specified in multiple square frames.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that in meter
Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented processing, thus in computer or
The instruction performed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in individual square frame or multiple square frames.
In a typical configuration, computing device includes one or more processors (CPU), input/output interface, net
Network interface and internal memory.
Internal memory potentially includes the volatile memory in computer-readable medium, random access memory (RAM) and/or
The forms such as Nonvolatile memory, such as read-only storage (ROM) or flash memory (flash RAM).Internal memory is computer-readable medium
Example.
Computer-readable medium includes permanent and non-permanent, removable and non-removable media can be by any method
Or technology come realize information store.Information can be computer-readable instruction, data structure, the module of program or other data.
The example of the storage medium of computer includes, but are not limited to phase transition internal memory (PRAM), static RAM (SRAM), moved
State random access memory (DRAM), other kinds of random access memory (RAM), read-only storage (ROM), electric erasable
Programmable read only memory (EEPROM), fast flash memory bank or other memory techniques, read-only optical disc read-only storage (CD-ROM),
Digital versatile disc (DVD) or other optical storages, magnetic cassette tape, the storage of tape magnetic rigid disk or other magnetic storage apparatus
Or any other non-transmission medium, the information that can be accessed by a computing device available for storage.Define, calculate according to herein
Machine computer-readable recording medium does not include temporary computer readable media (transitory media), such as data-signal and carrier wave of modulation.
It should also be noted that, term " comprising ", "comprising" or its any other variant are intended to nonexcludability
Comprising so that process, method, commodity or equipment including a series of key elements are not only including those key elements, but also wrap
Include other key elements being not expressly set out, or also include for this process, method, commodity or equipment intrinsic want
Element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that wanted including described
Also there is other identical element in process, method, commodity or the equipment of element.
It will be understood by those skilled in the art that the embodiment of the embodiment of the present invention can be provided as method, system or computer journey
Sequence product.Therefore, the embodiment of the present invention can be using complete hardware embodiment, complete software embodiment or with reference to software and hardware side
The form of the embodiment in face.Moreover, the embodiment of the present invention can be used wherein includes computer available programs one or more
Implement in the computer-usable storage medium (including but is not limited to magnetic disk storage, CD-ROM, optical memory etc.) of code
The form of computer program product.
Embodiments herein is the foregoing is only, the application is not limited to.For those skilled in the art
For, the application can have various modifications and variations.It is all any modifications made within spirit herein and principle, equivalent
Replace, improve etc., it should be included within the scope of claims hereof.
Claims (10)
1. a kind of detection method of signal, it is characterised in that applied to visible optical communication, methods described includes：
Line translation is entered to the first signal that photon detector is exported, the secondary signal of Gaussian distributed is obtained；Wherein, described
One signal is the signal that the photon detector is exported according to the former transmission signal received；
Multiple former transmission signals corresponding to first signal are obtained, the estimation signal of each former transmission signal are calculated, with true
The fixed decision rule made decisions to the secondary signal；Wherein, multiple former transmission signal category corresponding to first signal
In the constellation set of default constellation structures；
According to the decision rule, the secondary signal is made decisions, to obtain the corresponding estimation signal of the secondary signal,
By the corresponding former transmission signal of the estimation signal of acquisition, the former transmission signal of first signal is used as.
2. according to the method described in claim 1, it is characterised in that the estimation signal of each former transmission signal is calculated, to determine
Before the decision rule made decisions to the secondary signal, in addition to：
Detect the distance between the former transmission signal of any two value；
Compare the size of the distance between the former transmission signal of any two value, obtain the first comparative result；
Obtain the lowest distance value in first comparative result.
3. method according to claim 2, it is characterised in that the estimation signal of each former transmission signal is calculated, to determine
The decision rule made decisions to the secondary signal, including：
According to default calculation formula, the estimation signal of each former transmission signal is calculated；
According to the lowest distance value in first comparative result, the adjacent estimation signal of any two is arranged at equal intervals
Row, obtain estimating signal at equal intervals；
According to the equidistant estimation signal, the decision rule made decisions to the secondary signal is set.
4. method according to claim 3, it is characterised in that according to the decision rule, enter to second electric signal
Row judgement, to obtain the corresponding estimation signal of second electric signal, including：
Detect the distance between second electric signal and each estimation signal value；
Compare second electric signal and each size for estimating the distance between signal value, obtain the second comparative result；
Obtain the corresponding estimation signal of lowest distance value in second comparative result.
5. according to any described methods of claim 1-4, it is characterised in that institute in the constellation set of the default constellation structures
Each former transmission signal is stated to be made up of square number, and each former transmission signal be according to general power order from low to high according to
It is secondary to acquire.
6. a kind of detection means of signal, it is characterised in that applied to visible optical communication, described device includes：
Modular converter, the first signal for being exported to photon detector enters line translation, obtains the second letter of Gaussian distributed
Number；Wherein, first signal is the signal that the photon detector is exported according to the original signal received；
Processing module, for obtaining multiple former transmission signals corresponding to first signal, calculates each former transmission signal
Signal is estimated, to determine the decision rule made decisions to the secondary signal；Wherein, it is multiple corresponding to first signal
Former transmission signal belongs to the constellation set of default constellation structures；
Judging module, for according to the decision rule, being made decisions to second electric signal, to obtain second telecommunications
Number corresponding estimation signal, by the corresponding former transmission signal of the estimation signal of acquisition, letter is penetrated as the primary of the first signal
Number.
7. device according to claim 6, it is characterised in that also include：
Detection module, for detecting the distance between the former transmission signal of any two value；
Comparison module, the size for comparing the distance between the former transmission signal of any two value, obtains the first comparative result；
Acquisition module, for obtaining the lowest distance value in first comparative result.
8. device according to claim 7, it is characterised in that the processing module, specifically for：
According to default calculation formula, the estimation signal of each former transmission signal is calculated；
According to the lowest distance value in first comparative result, the adjacent estimation signal of any two is arranged at equal intervals
Row, obtain estimating signal at equal intervals；
According to the equidistant estimation signal, the decision rule made decisions to the secondary signal is set.
9. device according to claim 8, it is characterised in that the judging module, specifically for：
Detect the distance between second electric signal and each estimation signal value；
Compare second electric signal and each size for estimating the distance between signal value, obtain the second comparative result；
Obtain the corresponding estimation signal of lowest distance value in second comparative result.
10. according to any described devices of claim 6-9, it is characterised in that in the constellation set of the default constellation structures
Each former transmission signal is made up of square number, and each former transmission signal is the order according to general power from low to high
Acquire successively.
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| CN111656219A (en) * | 2017-12-15 | 2020-09-11 | 爱贝欧汽车系统有限公司 | Apparatus and method for determining a distance of at least one object using optical signals |
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| CN104218990A (en) * | 2014-09-30 | 2014-12-17 | 中国人民解放军信息工程大学 | Visible light communication system and visible light communication method |
| CN105452895A (en) * | 2013-06-13 | 2016-03-30 | 巴斯夫欧洲公司 | Detector for optically detecting at least one object |
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| CN104144015A (en) * | 2013-05-09 | 2014-11-12 | 中兴通讯股份有限公司 | Method, system, transmitting device and receiving device for achieving visible light communication |
| CN105452895A (en) * | 2013-06-13 | 2016-03-30 | 巴斯夫欧洲公司 | Detector for optically detecting at least one object |
| CN104218990A (en) * | 2014-09-30 | 2014-12-17 | 中国人民解放军信息工程大学 | Visible light communication system and visible light communication method |
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