CN104348545B - Multiple-input and multiple-output VISIBLE LIGHT EMISSION device, method and reception device, method - Google Patents
Multiple-input and multiple-output VISIBLE LIGHT EMISSION device, method and reception device, method Download PDFInfo
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- CN104348545B CN104348545B CN201310320044.8A CN201310320044A CN104348545B CN 104348545 B CN104348545 B CN 104348545B CN 201310320044 A CN201310320044 A CN 201310320044A CN 104348545 B CN104348545 B CN 104348545B
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Classifications
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/10—Arrangements of light sources specially adapted for spectrometry or colorimetry
Abstract
Multiple-input and multiple-output VISIBLE LIGHT EMISSION device, method and reception device, method, emitter include: signal transmitter unit and signal modulation unit；It include the array being made of 1 or more luminescent device in signal transmitter unit, for each luminescent device for emitting visible light, the frequency for the visible light that different luminescent devices issue is different；Signal modulation unit is used for the signal loading of each channel to the visible light of a frequency, and the signal of the visible light carrying of different frequency belongs to different channels.The reception device includes: signal receiving unit and signal processing unit；It along incident light direction successively include: incident light collimating device, one layer of substrate and detection array chip in the signal receiving unit；Has light blocking layer on vertical with an incident light surface in the substrate, the light blocking layer is equipped with the opening diffracting two-dimensional array being made of 2 or more the opening diffractings with different pore size size；Detected pixel in the detection array chip including 2 or more is first.
Description
Technical field
The present invention relates to a kind of multiple-input and multiple-output (Multiple-Input Multiple-Output, referred to as MIMO)
Visible light communication system more particularly to a kind of multiple-input and multiple-output VISIBLE LIGHT EMISSION device, method and reception device, method.
Background technique
Visible light communication (Visible Light Communications, referred to as VLC), is a kind of wireless communication skill
Art, it is 770nm between 390THz(wavelength using frequency) to 857THz(wavelength be 350nm) between visible light as communication
Medium completes information transmission.
In recent years, with the rapid development of semiconductor technology, LED(Light Emitting Diode, light-emitting diodes are based on
Pipe) illumination visible light communication obtained developing on a large scale very much as a kind of wireless access technology.Number is transmitted using LED visible light signal
According to there is a following advantage: LED light source has the characteristics that small low in energy consumption, long service life, size, easy driving, environmentally protective, is illuminating
While the high speed data transfer without electromagnetic interference is provided, solve broadband radio system frequency band is narrow and electromagnetic interference is asked
Topic, thus the substitution or complementary technology that visible light communication technology communicates indoors as radio communication technology have great
Development prospect has caused extensive concern and the research of people.
In order to improve message capacity, either radio communication or fiber optic communication, frequency division multiplexing or wave are generally all used
Divide multiplexing technology.Compared with single-frequency communication, frequency multiplexing technique transmits signal using multifrequency.The electromagnetic wave of each frequency
It can be used as an independent signal vehicle and be respectively transmitted unlike signal, to greatly improve message capacity.However radio frequency line
Divide the receiving end of multiplexing to need to configure antenna to receive electromagnetic wave signal and convert electromagnetic waves into electric signal, receives the effect of information
There are much relations in the position of the performance and antenna of fruit and antenna.The signal of different frequency needs to filter using band logical in separation channel
Wave device, but filtering characteristic is not ideal enough.There is also the reasons such as nonlinear effect in channel, therefore are easy to produce interference and wave between road
Shape distortion.And grating is generallyd use in the wavelength-division multiplex technique of fiber optic communication as demultiplexer, but the general volume of grating is larger,
And be difficult by frequency very close to signal separate.
The visible light MIMO technology of recent development sends more respectively based on the theory of frequency division multiplexing, using multiple LED light sources
The optical signal of a frequency respectively extracts the signal of each frequency in signal receiving end using frequency dividing device.Traditional frequency
Point multiplexing reception system bulk is larger and frequency resolution is not high, can be very in the small-sized mobile device such as mobile phone if to be integrated in
It is inconvenient.
Summary of the invention
The object of the present invention is to provide a kind of multiple-input and multiple-output VISIBLE LIGHT EMISSION device, method and reception device, method,
To overcome the disadvantage that conventional frequency division multiplexing reception system bulk is larger, frequency resolution is not high.
To solve the above problems, the present invention provides a kind of multiple-input and multiple-output visible light signal emitters, comprising: letter
Number transmitting unit and signal modulation unit；
It include the array being made of 1 or more luminescent device in the signal transmitter unit, wherein each luminescent device is used
It is different in the frequency of transmitting visible light, the visible light that different luminescent devices issue；
The signal modulation unit is used for the signal loading of each channel to the visible light of a frequency, and different
The signal of the visible light carrying of frequency belongs to different channels；Wherein, the visible light of different frequency is in different moments watt level
It changes.
Further,
It further include 2 or more optical filters in the signal transmitter unit, the visible light warp that each luminescent device issues
The frequency for crossing the visible light appeared after different optical filters is different.
Further,
The luminescent device is light emitting diode (LED), Field Electron Emission display (FED) or Organic Light Emitting Diode
(OLED).
The present invention also provides a kind of multiple-input and multiple-output visible light signal reception devices, comprising: signal receiving unit and
Signal processing unit；
It along incident light direction successively include: incident light collimating device, one layer of substrate and detection in the signal receiving unit
Array chip；
The incidence light collimating device is for guaranteeing that incident light impinges perpendicularly on the substrate；
Has light blocking layer on vertical with an incident light surface in the substrate, the light blocking layer is equipped with by 2
The opening diffracting two-dimensional array that above opening diffracting with different pore size size is constituted, the aperture size and incident light of each opening diffracting
Wavelength is close, and the depth of each opening diffracting is identical as the light blocking layer thickness；
Detected pixel in the detection array chip including 2 or more is first, and the position of each detected pixel member is spread out with described
The position of each opening diffracting mutually staggers in perforation two-dimensional array；The detectable signal output end of the detection array chip with it is described
Signal processing unit is connected, and the power of each frequency visible light for detecting each detected pixel member is sent to the signal
Processing unit；
The power for each frequencies of light that signal processing unit is used to be detected according to each detected pixel member for receiving and
Each detected pixel member of precognition to the detectivity of each frequency component, to each channel data of different frequency transmission of visible light into
Row solution data.
Further,
The power and precognition of each frequency visible light for being detected according to each detected pixel member received
Each detected pixel member to the detectivity of each frequency component, each channel data of different frequency transmission of visible light is solved
Data specifically include:
Using the performance number of the visible light of each frequency as unknown number, each detected pixel member received is detected
Performance number is as augmented matrix, using each detected pixel member measured in advance to the detectivity of each frequency component as coefficient square
Battle array, by regularization method solution matrix equation, obtains the watt level of each frequency visible light at a certain moment.
Further,
The incidence light collimating device is made into column using light absorbent, and incident light penetrates among columnar material.
Further,
The substrate is made of transparent material.
Further,
The light blocking layer is made by opaque material.
Further,
The detected pixel member is charge coupled cell (CCD) or cmos device (CMOS).
Further,
Signal processing unit is also used to the power of the visible light according to each frequency being calculated, it will be seen that optical signal turns
Become electric signal, then assign to each sub-channels and transmitted, and demodulated with demodulator, obtains original modulated signal.
Correspondingly, the present invention also provides a kind of multiple-input and multiple-output visible light signal launching techniques, are applied to visible light
In sender unit, comprising:
Each luminescent device in the visible light signal emitter emits visible light, wherein different luminescent devices issue
Visible light frequency it is different；
By on the visible light of the signal loading of each channel a to frequency, and the letter of the visible light carrying of different frequency
Number belong to different channels；Wherein, the visible light of different frequency changes in different moments watt level.
Further,
The luminescent device is light emitting diode (LED), Field Electron Emission display (FED) or Organic Light Emitting Diode
(OLED).
Correspondingly, the present invention also provides a kind of multiple-input and multiple-output visible light signal method of reseptances, are applied to visible light
In signal receiving device, comprising:
Incident light collimating device impinges perpendicularly on incident light in substrate；
Have light blocking layer on vertical with an incident light surface in substrate, on the light blocking layer by 2 or more
The opening diffracting two-dimensional array that opening diffracting with different pore size size is constituted projects visible light；Wherein, the aperture of each opening diffracting
Size and lambda1-wavelength are close, and the depth of each opening diffracting is identical as the light blocking layer thickness；
Detected pixel in detection array chip including 2 or more is first, the position of each detected pixel member and the opening diffracting
The position of each opening diffracting mutually staggers in two-dimensional array；The detectable signal output end and the signal of the detection array chip
Processing unit is connected, and the power for each frequency visible light that each detected pixel member detects is sent to the signal processing list
Member；
The power for each frequency visible light that signal processing unit is detected according to each detected pixel member received and
Each detected pixel member of precognition is to the detectivity of each frequency component, to each channel data of the transmission of visible light of different frequency
Carry out solution data.
Further,
The power for each frequency visible light that each detected pixel member that the basis receives detects and the institute of precognition
Each detected pixel member is stated to the detectivity of each frequency component, skill is carried out to each channel data of different frequency transmission of visible light
According to specifically including:
Using the performance number of the visible light of each frequency as unknown number, each detected pixel member received is detected
Performance number is as augmented matrix, using each detected pixel member measured in advance to the detectivity of each frequency component as coefficient square
Battle array, by regularization method solution matrix equation, obtains the watt level of each frequency visible light at a certain moment.
Further,
Power of the signal processing unit also according to the visible light for each frequency being calculated, it will be seen that optical signal is transformed into
Electric signal, then assign to each sub-channels and transmitted, and demodulated with demodulator, obtain original modulated signal.
The invention has the following advantages:
1, the method for filter plate is added to obtain the visible light of each frequency using luminescent device, the acquisition of the visible light of each frequency is only
It needs that different filter plates is added behind identical visible light source, reduces costs；
2, visible light signal reception device can be made of common material, and small in size, anti-vibration interference performance is strong, production
Simple process, integrated level are high.CCD or CMOS can be used in detection array chip, and the two is all matured product, can be easily
It obtains, and it is inner to be integrated into small-sized mobile terminal (such as mobile phone)；
3, the frequency distribution of each channel is intensive, frequency distribution range is wide.Due to detection array chip detected pixel member
Quantity determines the frequency resolution of signal receiving device, the visible light signal frequency range that detection array chip can detect
Determine the distribution of each channel frequency, nowadays the detected pixel member of detection array chip such as CCD, CMOS easily reaches hundred
Ten thousand to ten million or more, measurement range covers entire visible light wave range, thus the MIMO VISIBLE LIGHT SYSTEM may be implemented it is very high
Frequency resolution and transmit data in wider visible light signal frequency range, thus substantially increase signal transmission appearance
Amount.
Detailed description of the invention
Fig. 1 is the schematic perspective view of MIMO visible light communication system in the embodiment of the present invention；
Fig. 2 is the frequency partition method schematic diagram of the incident optical signal used in the embodiment of the present invention；
Fig. 3 is the optical signal analogous diagram obtained using MIMO visible light communication system of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention
Embodiment be described in detail.It should be noted that in the absence of conflict, in the embodiment and embodiment in the application
Feature can mutual any combination.
In the present embodiment, it is seen that include sender unit and signal receiving device in optical communication system；Wherein, signal
It include: signal transmitter unit and signal modulation unit in emitter；It include signal receiving unit and letter in signal receiving device
Number processing unit.Specifically:
It include the array being made of 1 or more luminescent device in signal transmitter unit, each luminescent device can for emitting
It is light-exposed.It can also include 2 or more optical filters, each photophore in order to realize frequency division multiplexing, in the signal transmitter unit
The frequency for the visible light that the visible light that part issues appears after different optical filters is different, respectively f1, f2, f3 ...
fn；Wherein, n is the number of optical filter；The frequency for the visible light that different luminescent devices issue is different, luminescent device can with but it is unlimited
In use LED(Light-Emitting Diode, light emitting diode), FED(Field Emission Display, field is sent a telegraph
Sub- emission display) or OLED(Organic Light-Emitting Diode, Organic Light Emitting Diode) it realizes；
Signal modulation unit is used for respectively by the signal loading of each channel to the visible light of a certain frequency, different frequencies
The signal of the visible light carrying of rate belongs to different channels；Watt level of the visible light of different frequency in different moments can occur
Variation；
Along incident light direction successively include: incident light collimating device in signal receiving unit, column is made into using light absorbent
Shape, incident light penetrate among columnar material, for guaranteeing that incident light impinges perpendicularly on opening diffracting two-dimensional array；One layer of substrate,
It is made of transparent material；Light blocking layer of one building on a substrate surface vertical with incident light, the light blocking layer is not by
Transparent material is made, and has the opening diffracting two-dimensional array being made of 2 or more the opening diffractings with different pore size size thereon, respectively spreads out
The aperture size and lambda1-wavelength of perforation are close to (range of lambda1-wavelength is exactly the range of visible wavelength, is 350nm-
Between 770nm, the wavelength of each opening diffracting aperture size and incident light is same or order of magnitude greater), the depth of each opening diffracting
It spends identical as light blocking layer thickness；Detection array chip including 2 or more detected pixel members, the detection array chip can be
CCD(Charge-coupled Device, charge coupled cell) or CMOS(Complementary Metal Oxide
Semiconductor, cmos device), at the detectable signal output end of detection array chip and signal
Reason unit is connected, and position and each in opening diffracting two-dimensional array of each of detection array chip detected pixel member are spread out
The position of perforation mutually staggers；
Signal processing unit is mainly made of calculating analysis component, each channel for the transmission of visible light to different frequency
Data carry out solution data.The process for solving data is as follows: using the performance number of the visible light of each frequency as unknown number；By detection array
The performance number that detected pixel member at the different location of chip detects is as augmented matrix；Measure detection array chip not in advance
With each detected pixel member at position to the detectivity of each frequency component, and using the detectivity as coefficient matrix；Pass through canonical
Change method solution matrix equation, so that it may obtain the watt level of each frequency visible light at a certain moment.Pass through detection array chip
Continuously and quickly measuring, signal processing unit continuously quickly calculate, so that it may it is big in the power at each moment to obtain each frequency visible light
It is small, and then know each frequency visible light in the signal at each moment.
Technical solution of the present invention is described in detail with reference to the accompanying drawing.
The core component of MIMO visible light communication system of the present invention includes:
Light-emitting element array (in this example by taking LED array as an example), incident light collimating device, opening diffracting two-dimensional array, one
Layer substrate and detection array chip.
As shown in Figure 1, LED array 7 is used to send the visible light of different frequency, wherein each LED issues a kind of frequency
Visible light signal.Lens 6 are incident light collimating device, to guarantee that visible light signal impinges perpendicularly on opening diffracting two-dimensional array.
Substrate 3 is made of clear material (such as polymer P MMA(polymethyl methacrylate) or PS(polystyrene))；Opening diffracting two
The building of array 1 is tieed up in the light blocking layer 2 on 3 surface of substrate, light blocking layer 2 is made of opaque material, and crome metal can be used, described to spread out
Perforation two-dimensional array includes a series of opening diffractings with different pore size size, and the aperture size and incident light wave of each opening diffracting
Long close, the depth of each opening diffracting is identical and is equal to the thickness of light blocking layer；Contain more than one spy in detection array chip 5
Survey pixel elements, these detected pixel members by calibration after, it can be ensured that phase co-wavelength, equal-wattage visible light be incident on these
When detected pixel member, the data of each pixel elements output are identical；Each opening diffracting and the detection in the opening diffracting two-dimensional array
The position of each detected pixel member in array chip mutually staggers；
In transmitting terminal, in order to realize frequency division multiplexing, the visible light of more than one visible light source can be passed through not respectively
It is appeared after same optical filter, the frequency by the emergent light of each optical filter is different, respectively f1, f2, f3 ... fn., will
Each channel signal of required transmission is loaded on different frequency f1, f2, f3 ... fn visible lights, with LED array or other shine
Watt level variation of the element arrays to the visible light signal of different frequency in different moments is transmitted.
In receiving end, it is seen that optical signal first passes around incident light collimating device, to guarantee that visible light signal impinges perpendicularly on
Opening diffracting two-dimensional array；Then, it is seen that optical signal can through the opening diffracting aperture to differ in size by opening diffracting two-dimensional array
Different degrees of diffraction can occur for light-exposed signal, and different light distribution is formed below each opening diffracting.Finally in detection battle array
Detected pixel member in column chip measures different visible powers, and detection the data obtained constitutes a system of linear equations:
Using performance number of each frequency visible light in incident light as unknown number, by the detection picture at the different location of detection array chip
The value that primitive element detects is right by each detected pixel member at the detection array chip different location measured in advance as augmented matrix
The detectivity of each frequency component, and using the detectivity as coefficient matrix；Pass through regularization method solution matrix equation, so that it may
Obtain the watt level of each frequency visible light at a certain moment.Pass through detection array chip continuously and quickly measuring, signal processing unit
It is continuous quickly to calculate, so that it may to obtain each frequency visible light in the signal at each moment.
Wherein, specific visible-light treatment method are as follows:
As shown in Fig. 2, abscissa indicates frequency, unit is hertz；Ordinate is normalization light signal power, and unit is watt
It is every hertz special.With the method for calculus incident optical signal according to frequency partition at n equal portions, every portion takes its centre frequency, often
A bandwidth is Δ f.Assuming that transmitting terminal has issued the visible light signal of n kind different frequency, a frequency is occupied per signal all the way
Rate f will be set as f per the centre frequency of visible light signal all the way1,f2,…fn, bandwidth is Δ f.When signal number n is bigger,
So according to the principle of calculus, the entire optical power of incident light can be indicated with following formula:
Wherein, P (fj) expression frequency be fjSignal amplitude.After incident light passes through opening diffracting two-dimensional array, detection array
Each detected pixel member in chip can detect the visible power after diffraction.On the one hand, detected pixel member receives
Power can pass through itself direct detection；And on the other hand, the power that detected pixel member detects can also pass through incident light
Power be calculated.Because the power (i.e. the area of the small rectangle of each in figure) of each frequency visible light is by some picture
There is a degree of reduction when primitive element detects.And due to different size of opening diffracting occur different degrees of diffraction make into
It is different to penetrate the ratio that the visible light of each frequency component of light reduces in each detected pixel member.After device is carried out,
Reduced ratio is a fixed value, can pass through opening diffracting two by the visible light of each frequency in measurement incident beam in advance
It is incident in some detected pixel member after dimension array and is calculated by the detectivity that the pixel elements are detected.Therefore it can obtain
To an equation, the left side of equation is the power measurement values of detected pixel member, is each frequency in incident light on the right of equation group
The watt level of visible light is added institute after being multiplied respectively with detectivity of the detected pixel member to each frequency visible light of incident light again
Obtained calculated value.Assuming that incident light is detected after opening diffracting two-dimensional array by i-th of detected pixel member, detected pixel member
On obtained visible power size may be expressed as:
Wherein, Cij(j=1,2 ..., n) are respectively that i-th of detected pixel member is f to frequencyjThe detectivity of visible light.When
When choosing n detected pixel member on detection array chip, this n pixel elements can measure a series of power, these power can
To be indicated in the form of matrix, wherein detectivity forms coefficient matrix C, and the detected pixel member in each detection array chip is surveyed
It obtains data and forms augmented matrix y, be expressed as follows:
Cx=y
With
Wherein, CijIt is f to frequency that (i=1,2,3 ... n) (j=1,2,3 ... n) was represented, which is i-th of detected pixel member,jIt can be seen that
The detectivity of light, the detectivity are that the frequency that i-th of detected pixel member receives is fjVisible power and incident light in should
The ratio of the visible power of frequency, after device is carried out, this ratio is fixed value, can measure to obtain in advance.Due to upper
The numerical value for stating the augmented matrix in equation group is not accurate numerical value, and there are measurement error, above-mentioned equation group is ill-conditioned linear systems,
It is difficult to go to calculate with common method.Therefore, the system of linear equations can preferably be solved with Tikhonov regularization method.Most
The size of the visible light signal of each frequency of the incident light obtained afterwards can be by P (f1), P (f2) ... P (fn) is fitted
And it obtains.
Since the signal transmitted in light wave changes over time, the value that detection array chip is detected is also to become at the moment
Change, so the visible light signal size of final calculated each frequency is also to change over time, in this way by each frequency
Visible light signal be transformed into electric signal, then assign to each sub-channels and transmitted, and demodulated with demodulator, so that it may obtain
Modulated signal originally.
Fig. 3 is believed using MIMO visible light communication system of the present invention and with the visible light that above-mentioned regular calculation method obtains
Number simulation result, the plot compares sending signal and receiving signal, in figure, abscissa indicates wavelength, and unit is nanometer；It is vertical to sit
Mark is normalization visible light signal power, and unit is every hertz of watt.Measurement wave-length coverage is 400nm to 800nm, You Tuke
See, sends signal and receive signal data and coincide very well.
In addition, in the present embodiment, correspondingly, a kind of multiple-input and multiple-output visible light signal launching technique, being applied to can
In light-exposed sender unit, comprising:
Each luminescent device in the visible light signal emitter emits visible light, wherein different luminescent devices issue
Visible light frequency it is different；
By on the visible light of the signal loading of each channel a to frequency, and the letter of the visible light carrying of different frequency
Number belong to different channels；Wherein, the visible light of different frequency changes in different moments watt level.
Preferably,
The luminescent device is light emitting diode (LED), Field Electron Emission display (FED) or Organic Light Emitting Diode
(OLED)
A kind of multiple-input and multiple-output visible light signal method of reseptance is applied in visible light signal reception device, comprising:
Incident light collimating device impinges perpendicularly on incident light in substrate；
Have light blocking layer on vertical with an incident light surface in substrate, on the light blocking layer by 2 or more
The opening diffracting two-dimensional array that opening diffracting with different pore size size is constituted projects visible light；Wherein, the aperture of each opening diffracting
Size and lambda1-wavelength are close, and the depth of each opening diffracting is identical as the light blocking layer thickness；
Detected pixel in detection array chip including 2 or more is first, the position of each detected pixel member and the opening diffracting
The position of each opening diffracting mutually staggers in two-dimensional array；The detectable signal output end and the signal of the detection array chip
Processing unit is connected, and the power for each frequency visible light that each detected pixel member detects is sent to the signal processing list
Member；
The power for each frequency visible light that signal processing unit is detected according to each detected pixel member received and
Each detected pixel member of precognition is to the detectivity of each frequency component, to each channel data of the transmission of visible light of different frequency
Carry out solution data.
Preferably,
The power for each frequency visible light that each detected pixel member that the basis receives detects and the institute of precognition
Each detected pixel member is stated to the detectivity of each frequency component, skill is carried out to each channel data of different frequency transmission of visible light
According to specifically including:
Using the performance number of the visible light of each frequency as unknown number, each detected pixel member received is detected
Performance number is as augmented matrix, using each detected pixel member measured in advance to the detectivity of each frequency component as coefficient square
Battle array, by regularization method solution matrix equation, obtains the watt level of each frequency visible light at a certain moment.
Preferably,
Power of the signal processing unit also according to the visible light for each frequency being calculated, it will be seen that optical signal is transformed into
Electric signal, then assign to each sub-channels and transmitted, and demodulated with demodulator, obtain original modulated signal.
Those of ordinary skill in the art will appreciate that all or part of the steps in the above method can be instructed by program
Related hardware is completed, and described program can store in computer readable storage medium, such as read-only memory, disk or CD
Deng.Optionally, one or more integrated circuits can be used also to realize in all or part of the steps of above-described embodiment.Accordingly
Ground, each module/unit in above-described embodiment can take the form of hardware realization, can also use the shape of software function module
Formula is realized.The present invention is not limited to the combinations of the hardware and software of any particular form.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.According to
Summary of the invention of the invention can also have other various embodiments, without deviating from the spirit and substance of the present invention, be familiar with
Those skilled in the art makes various corresponding changes and modifications in accordance with the present invention, all in the spirit and principles in the present invention
Within, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (19)
1. a kind of visible light communication system, including multiple-input and multiple-output visible light signal emitter and multiple-input and multiple-output it is visible
Light signal receiving, wherein
The multiple-input and multiple-output visible light signal emitter includes: signal transmitter unit and signal modulation unit；
It include the array being made of 1 or more luminescent device in the signal transmitter unit, wherein each luminescent device is for sending out
Visible light is penetrated, the frequency for the visible light that different luminescent devices issue is different；
The signal modulation unit is used for the signal loading of each channel to the visible light of a frequency, and different frequency
Visible light carrying signal belong to different channels；Wherein, the visible light of different frequency occurs in different moments watt level
Variation；
The multiple-input and multiple-output visible light signal reception device includes: signal receiving unit and signal processing unit；The letter
It along incident light direction successively include: incident light collimating device, a floor substrate and detection array chip in number receiving unit；
The incidence light collimating device is for guaranteeing that incident light impinges perpendicularly on the substrate；
Has light blocking layer on vertical with an incident light surface in the substrate, the light blocking layer is equipped with by 2 or more
The opening diffracting two-dimensional array that constitutes of opening diffracting with different pore size size, the aperture size and lambda1-wavelength of each opening diffracting
Close, the depth of each opening diffracting is identical as the light blocking layer thickness；
Detected pixel in the detection array chip including 2 or more is first, the position of each detected pixel member and the opening diffracting
The position of each opening diffracting mutually staggers in two-dimensional array；The detectable signal output end and the signal of the detection array chip
Processing unit is connected, and the power of each frequency visible light for detecting each detected pixel member is sent to the signal processing
Unit；
The power and precognition for each frequencies of light that signal processing unit is used to be detected according to each detected pixel member received
Each detected pixel member to the detectivity of each frequency component, each channel data of different frequency transmission of visible light is solved
Data；It is also used to the power of the visible light according to each frequency being calculated, it will be seen that optical signal is transformed into electric signal, then divides
It is transmitted to each sub-channels, and is demodulated with demodulator, obtain original modulated signal；Wherein, different frequency can
It is light-exposed to change in different moments watt level.
2. the system as claimed in claim 1, it is characterised in that:
It further include 2 or more optical filters in the signal transmitter unit, the visible light that each luminescent device issues is not by
The frequency of the visible light appeared after same optical filter is different.
3. the system as claimed in claim 1, it is characterised in that:
The luminescent device is Light-emitting diode LED, Field Electron Emission display FED or Organic Light Emitting Diode OLED.
4. the system as claimed in claim 1, it is characterised in that:
The power of each frequency visible light for being detected according to each detected pixel member received and the institute of precognition
Each detected pixel member is stated to the detectivity of each frequency component, skill is carried out to each channel data of different frequency transmission of visible light
According to specifically including:
Using the performance number of the visible light of each frequency as unknown number, the power that each detected pixel member received is detected
Value is used as augmented matrix, using each detected pixel member measured in advance to the detectivity of each frequency component as coefficient matrix,
By regularization method solution matrix equation, the watt level of each frequency visible light at a certain moment is obtained.
5. the system as claimed in claim 1, it is characterised in that:
The incidence light collimating device is made into column using light absorbent, and incident light penetrates among columnar material.
6. the system as claimed in claim 1, it is characterised in that:
The substrate is made of transparent material.
7. the system as claimed in claim 1, it is characterised in that:
The light blocking layer is made by opaque material.
8. the system as claimed in claim 1, it is characterised in that:
The detected pixel member is charge coupled cell CCD or cmos device CMOS.
9. a kind of multiple-input and multiple-output visible light signal reception device is applied to visible light communication system, comprising: signal receives single
Member and signal processing unit；It along incident light direction successively include: incident light collimating device, one layer of base in the signal receiving unit
Bottom and detection array chip；
The incidence light collimating device is for guaranteeing that incident light impinges perpendicularly on the substrate；
Has light blocking layer on vertical with an incident light surface in the substrate, the light blocking layer is equipped with by 2 or more
The opening diffracting two-dimensional array that constitutes of opening diffracting with different pore size size, the aperture size and lambda1-wavelength of each opening diffracting
Close, the depth of each opening diffracting is identical as the light blocking layer thickness；
Detected pixel in the detection array chip including 2 or more is first, the position of each detected pixel member and the opening diffracting
The position of each opening diffracting mutually staggers in two-dimensional array；The detectable signal output end and the signal of the detection array chip
Processing unit is connected, and the power of each frequency visible light for detecting each detected pixel member is sent to the signal processing
Unit；
The power and precognition for each frequencies of light that signal processing unit is used to be detected according to each detected pixel member received
Each detected pixel member to the detectivity of each frequency component, each channel data of different frequency transmission of visible light is solved
Data；It is also used to the power of the visible light according to each frequency being calculated, it will be seen that optical signal is transformed into electric signal, then divides
It is transmitted to each sub-channels, and is demodulated with demodulator, obtain original modulated signal；Wherein, different frequency can
It is light-exposed to change in different moments watt level.
10. device as claimed in claim 9, it is characterised in that:
The power of each frequency visible light for being detected according to each detected pixel member received and the institute of precognition
Each detected pixel member is stated to the detectivity of each frequency component, skill is carried out to each channel data of different frequency transmission of visible light
According to specifically including:
Using the performance number of the visible light of each frequency as unknown number, the power that each detected pixel member received is detected
Value is used as augmented matrix, using each detected pixel member measured in advance to the detectivity of each frequency component as coefficient matrix,
By regularization method solution matrix equation, the watt level of each frequency visible light at a certain moment is obtained.
11. device as claimed in claim 9, it is characterised in that:
The incidence light collimating device is made into column using light absorbent, and incident light penetrates among columnar material.
12. device as claimed in claim 9, it is characterised in that:
The substrate is made of transparent material.
13. device as claimed in claim 9, it is characterised in that:
The light blocking layer is made by opaque material.
14. device as claimed in claim 9, it is characterised in that:
The detected pixel member is charge coupled cell CCD or cmos device CMOS.
15. a kind of visible light communication method, including multiple-input and multiple-output visible light signal launching technique and multiple-input and multiple-output can
Light-exposed signal acceptance method, wherein
The multiple-input and multiple-output visible light signal launching technique is applied in visible light signal emitter, comprising:
Each luminescent device in the visible light signal emitter emits visible light, wherein what different luminescent devices issued can
Light-exposed frequency is different；
By on the visible light of the signal loading of each channel a to frequency, and the signal category of the visible light carrying of different frequency
In different channels；Wherein, the visible light of different frequency changes in different moments watt level；
The multiple-input and multiple-output visible light signal method of reseptance, the visible light signal applied to visible light communication system receive dress
In setting, comprising:
Incident light collimating device impinges perpendicularly on incident light in substrate；
Has light blocking layer on vertical with an incident light surface in substrate, being had on the light blocking layer by 2 or more
The opening diffracting two-dimensional array that the opening diffracting of different pore size size is constituted projects visible light；Wherein, the aperture size of each opening diffracting
Close with lambda1-wavelength, the depth of each opening diffracting is identical as the light blocking layer thickness；
Detected pixel in detection array chip including 2 or more is first, the position of each detected pixel member and opening diffracting two dimension
The position of each opening diffracting mutually staggers in array；The detectable signal output end and signal processing unit of the detection array chip
It is connected, the power for each frequency visible light that each detected pixel member detects is sent to the signal processing unit；
The power and precognition for each frequency visible light that signal processing unit is detected according to each detected pixel member received
Each detected pixel member to the detectivity of each frequency component, each channel data of the transmission of visible light of different frequency is carried out
Solve data；Power of the signal processing unit also according to the visible light for each frequency being calculated, it will be seen that optical signal is transformed into
Electric signal, then assign to each sub-channels and transmitted, and demodulated with demodulator, obtain original modulated signal；Wherein, no
The visible light of same frequency changes in different moments watt level.
16. method as claimed in claim 15, it is characterised in that:
The luminescent device is Light-emitting diode LED, Field Electron Emission display FED or Organic Light Emitting Diode OLED.
17. method as claimed in claim 15, it is characterised in that:
The power of each frequency visible light that each detected pixel member that the basis receives detects and precognition it is described each
Detected pixel member carries out solution data to each channel data of different frequency transmission of visible light to the detectivity of each frequency component, tool
Body includes:
Using the performance number of the visible light of each frequency as unknown number, the power that each detected pixel member received is detected
Value is used as augmented matrix, using each detected pixel member measured in advance to the detectivity of each frequency component as coefficient matrix,
By regularization method solution matrix equation, the watt level of each frequency visible light at a certain moment is obtained.
18. a kind of multiple-input and multiple-output visible light signal method of reseptance, the visible light signal applied to visible light communication system connect
In receiving apparatus, comprising:
Incident light collimating device impinges perpendicularly on incident light in substrate；
Has light blocking layer on vertical with an incident light surface in substrate, being had on the light blocking layer by 2 or more
The opening diffracting two-dimensional array that the opening diffracting of different pore size size is constituted projects visible light；Wherein, the aperture size of each opening diffracting
Close with lambda1-wavelength, the depth of each opening diffracting is identical as the light blocking layer thickness；
Detected pixel in detection array chip including 2 or more is first, the position of each detected pixel member and opening diffracting two dimension
The position of each opening diffracting mutually staggers in array；The detectable signal output end and signal processing unit of the detection array chip
It is connected, the power for each frequency visible light that each detected pixel member detects is sent to the signal processing unit；
The power and precognition for each frequency visible light that signal processing unit is detected according to each detected pixel member received
Each detected pixel member to the detectivity of each frequency component, each channel data of the transmission of visible light of different frequency is carried out
Solve data；Power of the signal processing unit also according to the visible light for each frequency being calculated, it will be seen that optical signal is transformed into
Electric signal, then assign to each sub-channels and transmitted, and demodulated with demodulator, obtain original modulated signal；Wherein, no
The visible light of same frequency changes in different moments watt level.
19. method as claimed in claim 18, it is characterised in that:
The power of each frequency visible light that each detected pixel member that the basis receives detects and precognition it is described each
Detected pixel member carries out solution data to each channel data of different frequency transmission of visible light to the detectivity of each frequency component, tool
Body includes:
Using the performance number of the visible light of each frequency as unknown number, the power that each detected pixel member received is detected
Value is used as augmented matrix, using each detected pixel member measured in advance to the detectivity of each frequency component as coefficient matrix,
By regularization method solution matrix equation, the watt level of each frequency visible light at a certain moment is obtained.
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|---|---|---|---|
| CN201310320044.8A CN104348545B (en) | 2013-07-26 | 2013-07-26 | Multiple-input and multiple-output VISIBLE LIGHT EMISSION device, method and reception device, method |
| PCT/CN2013/088637 WO2014166268A1 (en) | 2013-07-26 | 2013-12-05 | Multiple-input and multiple-output visible light transmitting device and method and receiving device and method |
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| CN201310320044.8A CN104348545B (en) | 2013-07-26 | 2013-07-26 | Multiple-input and multiple-output VISIBLE LIGHT EMISSION device, method and reception device, method |
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| CN104660344B (en) * | 2015-02-09 | 2017-07-18 | 南京邮电大学 | The optical communication system and its signal restoring method of a kind of multiple-input and multiple-output |
| CN104966415A (en) * | 2015-06-15 | 2015-10-07 | 上海交通大学 | Vehicle safety control method and system based on LED visible light communication technology |
| CN106685492B (en) * | 2017-01-11 | 2020-09-01 | 格利尔数码科技股份有限公司 | Method for transmitting cooperative information based on radio over fiber communication system |
| WO2018201607A1 (en) * | 2017-05-04 | 2018-11-08 | 游军 | Signal input system and electronic system applying same |
| WO2018201608A1 (en) * | 2017-05-04 | 2018-11-08 | 游军 | Signal input system and electronic system applying same |
| CN108464818B (en) * | 2018-04-13 | 2023-12-29 | 南方科技大学 | Miniature LED probe |
| CN109412698B (en) * | 2018-10-10 | 2022-01-25 | 南京邮电大学 | Multi-input multi-output optical communication system and communication method based on diffraction effect |
| CN109639362B (en) * | 2018-11-27 | 2022-04-12 | 南京邮电大学 | Multi-input multi-output optical communication system and communication method based on scattering effect |
| CN109347557B (en) * | 2018-11-27 | 2021-12-10 | 南京邮电大学 | Multi-input multi-output optical communication system and communication method based on filtering effect |
| CN110808785B (en) * | 2019-11-08 | 2023-02-28 | 新疆大学 | Multi-input multi-output visible light communication transmitting device combining light beams |
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| CN104348545A (en) | 2015-02-11 |
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