CN110417467A - Visible light communication transmitting terminal, receiving end and system is imaged in MIMO - Google Patents
Visible light communication transmitting terminal, receiving end and system is imaged in MIMO Download PDFInfo
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
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Abstract
This application discloses a kind of MIMO imaging visible light communication transmitting terminal, receiving end and systems, are related to technical field of visible light communication.Wherein transmitting terminal includes the uplink optical signal receiver, visible data transmitter and visible light synchronous transmitter being arranged in the same direction, and the uplink optical signal receiver, visible data transmitter and visible light synchronous transmitter are connect with transmitting terminal data processing module；Receiving end includes the visible data receiver and uplink optical signal transmitter being arranged in the same direction, and the visible data receiver and uplink optical signal transmitter are connect with receiving end data processing module；System includes above-mentioned transmitting terminal and receiving end.The application can realize the communication process of transmission rate variation according to the quality or other interested Comparative indices of specific visible optical link (VLC), meet a kind of realization of unidirectional MIMO imaging visible light communication method.
Description
Technical field
The present invention relates to technical field of visible light communication, more particularly, to it is a kind of can with the MIMO of Adaptive Transmission rate at
As visible light communication transmitting terminal, receiving end and system.
Background technique
With the maturation and development of LED technology, using the electroluminescent high-speed response characteristic of LED realize high-speed communication can
The light-exposed communication technology has gradually developed.In visible light communication technology, taking the photograph comprising photosensitive sensors such as CMOS or CCD is used
As head as receive terminal imaging visible light communication system in MIMO transmission mode --- i.e. MIMO --- aspect
With certain technical advantage.Simultaneously as the device that mobile phone, monitoring device etc. have camera function becomes increasingly popular, camera conduct
It can be seen that the input cost again of optical receiver terminal almost can be ignored, therefore the communication reception technique has cost advantage.
But the full width frame sampling rate of universal camera shooting device generally arrives several hundred frame/seconds tens, (common to shine with LED launch terminal bandwidth
Bright LED also can reach number million) it compares, it is clear that it is the bandwidth short slab of this visible light communication technology.
It is shown in FIG. 1 in the prior art, it is seen that optical communication system is a kind of communication of One-to-All Broadcast, including VISIBLE LIGHT EMISSION end
With visible optical receiving end.VISIBLE LIGHT EMISSION end is converted into after information coding to be launched, modulation optical signal, is sent out by LED emitter
It penetrates；It can be seen that the imaging sensor of optical receiving end, i.e. camera, receive optical signal, image information is extracted, and to picture information decoding
Obtain information data.Existing visible light communication process is, when the visible data receiver of visible optical receiving end receive it is visible
After the optical signal of light emitting end transmitting, the image of a width can be generated, visible data transmitter is several in each image
A LED array element shows a variety of color or on-off signal, it is seen that optical receiving end acquires image and according in every piece image
The color or on-off of each array element are decoded, and then again splice several decoding result to obtain complete information field.
Chinese patent CN201410202584.0 provides a kind of visible light communication system of compatible smart phone, the system
Comprising VISIBLE LIGHT EMISSION end and visible optical receiving end, in an one-way communication of visible optical link, it is seen that light emitting end is with pre-
If fixed rate send picture signal, it is seen that optical receiving end receives and parses through picture signal with same fixed rate, thus
Complete an one-way communication.The system is further comprised extraction partial information can be used for from the visible optical information that transmitting terminal provides
Method for distinguishing is known in communication, but in the still unresolved MIMO imaging visible light communication of the system the technical issues of Adaptive Transmission rate,
That is, if communication speed is fixed on a higher value, in complex condition, communication quality is difficult to ensure, if will
Communication speed is fixed on a lower value, then can not achieve biggish communication bandwidth.
It in the prior art, is the sampling rate for improving camera, it can be by being carried out to the photosensitive sensor in camera
The mode of branch's exposure improves full width frame sampling rate, i.e. roller shutter type exposes.The technological means is low in solution transmission rate
One common method, but this needs visible optical communication receiving device (such as mobile phone) range transmission source close enough, limits transmission
Flexibility, while but also its in MIMO transmission by compared with multiple constraint.
On the other hand, the system in transmission, for generally using OOK modulation, it is seen that the light intensity of optical transmitting set has one
Fixed variation, will lead to imaging camera head survey to a certain extent light, exposure it is not accurate so that image light and shade occur
It is obvious to rise and fall, difficulty is brought to the extraction of visible light signal in image.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of MIMO, and visible light communication method, transmitting terminal, reception is imaged
End and system, it can realize the communication of transmission rate variation according to the quality of specific visible optical link (VLC).
In order to solve the above technical problems, the present invention is supplied to a kind of MIMO imaging visible light communication method, including following
Step: the modulation parameter of visible optical link is judged according to received first optical signal of low-rate modulated mode, and obtains the first light
The brief information for the information description object that signal carries.Using the modulation parameter and/or brief information as Comparative indices, according to
Carry the uplink optical signal starting Adaptive Modulation mode of the modulation parameter；It receives and carries under Adaptive Modulation mode
Second optical signal of the data frame information of higher rate；The modulation parameter includes peak transfer rate；Second optical signal
Including carrying the picture signal of data frame information and carrying the synchronization signal of the data frame identification information.According to the above method,
First optical signal and the second optical signals carry different data frames in the difference of its function and effect respectively, right respectively
It should be the first data frame and the second data frame, two kinds of the different of data frame have sufficient theory in the embodiment that this patent provides
It is bright.
Based on the above method, first aspect present invention provides a kind of MIMO imaging visible light communication transmitting terminal, comprising: on
Traveling optical signal receiver, for receiving the uplink optical signal for carrying visible light communication control information, the visible light communication control
Operating mode switching command or communications rate information are carried in information processed；Transmitting terminal data processing module is used for root
Information switching working mode is controlled according to the visible light communication or to generating driving signal after information coding to be sent, modulation；
Visible data transmitter, for sending the first data by visible optical link under low-rate modulated mode according to driving signal
Frame, and/or, the second data frame is sent by visible optical link under the adaptation rate modulating mode of higher speed；Visible light is same
Transmitter is walked, for carrying the first data frame by the transmission of visible optical link under low-rate modulated mode according to driving signal
Alternating mark the first optical signal, and/or, carry the by the transmission of visible optical link under adaptation rate modulating mode
Second optical signal of the sync id of two data frames.Wherein, the first data frame and the first optical signal are carried on the first picture signal,
Second data frame and the second optical signal are carried on the second picture signal.
In some embodiments of first aspect present invention, synchronization signal is carried in the visible light communication control information
Cycle information, the operating mode switching command include equipment enabled instruction.
In some embodiments of first aspect present invention, the visible data transmitter includes one or more data
Array element, each data array element includes multiple linearly aligned conjugate units, each total in conjugate unit, that is, same data cell
The summation of yoke unit luminous intensity transmitted at any one time remains unchanged；When visible data transmitter includes multiple data matrixes
When first, the orientation of each data array element is orthogonal with the orientation of its internal each conjugate unit or there are quadrature component,
When such as individual data array element including the pairs of conjugate unit being longitudinally arranged above and below, the conjugate unit in each data array element is laterally
It is arranged above and below；The visible light synchronous transmitter includes at least a synchronous array element, synchronous array element light emitted intensity when being connected
Equal to data cell emissive porwer summation in aforementioned data transmitter individual data array element, in some embodiment of the invention,
Different synchronization array element can be configured and specified different data array element carries out above-mentioned matching, to realize complicated optical signal tune
System.
In some embodiments of first aspect present invention, the data array element in the visible light emitter is by two data
Unit composition, when sending data, the sum of the two luminous intensity remains unchanged.Can guarantee data source transmitting data procedures it
Middle totality light intensity remains unchanged, specifically, another, which then extinguishes, is shown as 0 if a conducting is shown as 1.To realize camera shooting
Head image exposure is stablized.
In some embodiments of first aspect present invention, the tune of the first image signal and/or the second picture signal
Method processed is complex modulated, and a part of the complex modulated uses the modulation of space pixel, ON-OFF keying modulation, color tune
System, pulse width modulation or pulse interval modulation.
Second aspect of the present invention provides a kind of MIMO imaging visible light communication receiving end, comprising: visible data receives
Device, for receiving the first data frame under low-rate modulated mode by visible optical link and carrying the alternating of the first data frame
First optical signal of mark, and/or, the second data frame is received under adaptation rate modulating mode and carries the second data frame
Sync id the second optical signal；Receiving end data processing module, for carrying first data frame and described
First picture signal of one optical signal generates visible light communication control information after being modulated, decoding, and/or, to carrying
State the second data frame and second optical signal the second picture signal demodulated, decoded after generate and receive information；It is described can
Operating mode switching command or transmission communication transmission rate information are carried in light-exposed Communication Control information；Uplink optical signal transmitting
Device, for sending the uplink optical signal for carrying visible light Communication Control information.
In some embodiments of second aspect of the present invention, the visible data receiver using exposure mode line by line at
Picture.
In some embodiments of second aspect of the present invention, including zoom system, pancreatic system, the first picture signal is sent for adjusting
And/or second picture signal imaging area of the target array element in visible data receiver；And/or including holder, be used for
Adjustment send the target array element of the first picture signal and/or the second picture signal in visible data receiver at image position
It sets.
In some embodiments of second aspect of the present invention, the solution of the first image signal and/or the second picture signal
Tune method is compound demodulation, and a part of the compound demodulation is using the demodulation of space pixel, on-off keying demodulation, color solution
It adjusts, pulse width demodulation or pulse spacing demodulate.
In some embodiments of second aspect of the present invention, synchronization signal is carried in the visible light communication control information
Cycle information, the operating mode switching command include equipment enabled instruction.
Third aspect present invention provides a kind of MIMO imaging visible light communication system, which includes first aspect
Visible light communication transmitting terminal is imaged in MIMO and visible light communication receiving end is imaged in the MIMO of second aspect.The MIMO imaging is visible
Optical communication transmission end and the imaging visible light communication receiving end the MIMO pass through visible light link connection, the visible optical link
It is used for transmission the first optical signal that carrying carries the alternating mark of the first data frame, and/or, carrying carries the second data frame
Sync id the second optical signal.
In some embodiments of third aspect present invention, including control terminal, for visible light to be imaged to the MIMO
Communication transmitting terminal sends the visible light communication control information for carrying operating mode switching command.
As can be seen from the above technical solutions, the embodiment of the present invention mainly meets a kind of MIMO imaging visible light communication side
The realization of method, this method may include: MIMO visible light communication receiving end passes through in the low rate tune for being in predetermined traffic rate
The available transmission rate and low speed information for obtaining MIMO visible light communication transmitting terminal when molding formula are (such as the object of information to be transmitted
ID, title, attribute and basic parameter etc.), and one of them preferable transmission rate is selected, then notify that the MIMO visible light is logical
Letter transmitting terminal is switched to the adaptation rate modulating mode that data are sent with the transmission rate, to realize Adaptive Transmission rate
MIMO be imaged visible light one-way communication.In some embodiments, multiple MIMO imaging visible light communication transmitting terminals and MIMO at
As a kind of One-to-All Broadcast communication mode may be implemented in visible light communication receiving end, so that a MIMO imaging visible light communication receives
End can choose most interested one in multiple MIMO imaging visible light communication transmitting terminal and be communicated, and the invention enables can
Light-exposed link communication quality allows a Comparative indices as this selection, and realizes the communication speed of dynamic adjustment system
Degree.In some embodiments, MIMO visible light communication receiving end of the invention or MIMO visible light communication transmitting terminal can be only
The step of vertical works accordingly according to MIMO imaging visible light communication method, missing can be by discrete disparate modules number
It is completed according to the cooperation of coupling and is not limited to realize in the same device.
Detailed description of the invention
Fig. 1 is the functional block diagram of visible light communication system in the prior art；
Fig. 2 is the functional block diagram that visible optical communication is imaged in MIMO in one embodiment of the invention；
Fig. 3 is the structural block diagram that visible optical communication transmitting terminal is imaged in MIMO in a specific embodiment of the invention；
Fig. 4 is the structural schematic diagram that visible optical communication transmitting terminal is imaged in MIMO in a specific embodiment of the invention；
Fig. 5 is the structural block diagram that visible optical communication receiving end is imaged in MIMO in a specific embodiment of the invention；
Fig. 6 is the structural schematic diagram that visible optical communication receiving end is imaged in MIMO in a specific embodiment of the invention；
Fig. 7 is the piece image imaging schematic diagram that visible optical communication transmitting terminal is imaged in MIMO in Fig. 4；
Fig. 8 is the another piece image imaging schematic diagram that visible optical communication transmitting terminal is imaged in MIMO in Fig. 4；
Fig. 9 is the schematic diagram of MIMO imaging visible light communication system in a specific embodiment of the invention；
Figure 10 is the piece image imaging schematic diagram that visible optical communication receiving end is imaged in a MIMO in Fig. 9
Figure 11 is the status diagram that visible optical communication transmitting terminal is imaged in MIMO in a specific embodiment；
Figure 12 is another status diagram that visible optical communication transmitting terminal is imaged in MIMO in Figure 11.
Specific embodiment
Technical solution provided by the invention and technical effect are made in the following with reference to the drawings and specific embodiments further detailed
Explanation.These attached drawings are simplified schematic diagram, and the basic structure of the invention will be illustrated schematically only, therefore it only shows
Composition related to the present invention.Obviously, the described embodiment is only a part of the embodiment of the present invention, rather than whole implementation
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
All other embodiment, shall fall within the protection scope of the present invention.
First it should be noted that such as transmitting terminal data processing module, receiving end data processing module mould in the present invention
Block is the statement for completing specific complete functional unit, is completed physically can be by signal or data coupling with cooperating
Multiple separation units of the concrete function are also possible to complete an integrated component of the function, while being also possible to collect at one
At a software module for completing specified function in component by controlling special interface, such as CPU in operation multitasking
In a thread instance, process instance or complete application for completing the function.
Core of the invention thinking is to realize the following means of communication, according to received first optical signal of low-rate modulated mode
Judge the modulation parameter of visible optical link and carried other low speed information (ID of the object of information such as to be transmitted, title,
Attribute and basic parameter etc.), Adaptive Modulation mode is started according to the uplink optical signal for carrying the modulation parameter, certainly
It adapts to receive the second optical signal for carrying data frame information under modulating mode；The modulation parameter includes peak transfer rate；
Second optical signal includes the picture signal for carrying data frame information and the synchronization signal for carrying the data frame identification information.
First optical signal and the second optical signals of the present invention carry the difference of information, modulator approach or purposes in it, therefore use
First, second is distinguished, other differences of the two and its bring effect can also be shown easily in this specification description
It obtains.In addition, being area when describing the structure of data frame of the first optical signal and the second optical signal, effect or processing method
The difference of divided data frame is distinguished using the first data frame and the second data frame, and specific difference can also be from this specification
It shows in description and easily obtains.
Embodiment one
For overall description technical solution provided by the invention, as shown in Fig. 2, the present embodiment is imaged from a MIMO
Visible light communication system is imaged in the MIMO of optical communication transmission end and a MIMO imaging visible light communication receiving end composition, in this hair
In bright specific embodiment, unless the context clearly indicates other meaning, the transmitting terminal, receiving end and system refer both to MIMO
Visible light communication transmitting terminal, receiving end and system is imaged.The present embodiment system can be completed unidirectional from transmitting terminal to receiving end
Communication, as known to those skilled in the art, if being equipped with the device of transmitting terminal and receiving end in system simultaneously comprising two, accordingly
The both-way communication that can be completed between two devices.
Compared with the visible light communication system of the prior art in Fig. 1, the present embodiment is additionally arranged uplink optical signal in transmitting terminal
Receiver is additionally arranged uplink optical signal transmitter in receiving end, as a result, outside the visible optical link of one-way communication, increases one
A uplink optical link, the uplink optical link are used to provide the relevant visible light of visible to one-way communication optical link to transmitting terminal and lead to
Letter control information.Specifically, an effect of the uplink optical link is, in formal or big data quantity visible optical link
The uplink optical signal for carrying adaptation rate modulation intelligence is provided from receiving end to transmitting terminal before one-way communication, adaptively
Rate modulation information includes communications rate information.One effect of the uplink optical link also resides in, and is in one in transmitting terminal
It, can be by wishing that the receiving end communicated provides it an operating mode switching command, to start when a working condition
The visible optical link of one-way communication.Correspondingly, the operating mode of the transmitting terminal of the present embodiment includes standby mode, low-rate modulated
Mode and adaptation rate modulating mode, wherein standby mode refers to the state without visible light output such as power saving, shutdown, low rate
Modulating mode refers in the prior art according to the state of predetermined modulation pattern and modulation rate output visible light, adaptation rate modulation
Mode refers to the state of modulating mode and modulation rate output visible light according to uplink optical signal dynamic setting.It is low in the present embodiment
The transmitting terminal of rate modulation mode, an effect are that the offer broadcasted by visible optical link to not specific receiving end is brief
Data information, another effect are to provide the visible images for assessing visible optical link for receiving end.Some specific
In embodiment, brief data information can be the identification information of transmitting terminal, the receiving ends such as length information of information to be sent are used for
It assesses whether to establish the information that adaptation rate modulation communicates.Correspondingly, being different from the prior art, the present embodiment transmitting terminal includes
Visible light synchronous transmitter, to cooperate visible data transmitter to extract its clock information in order to visible optical receiving end, also
It is the benchmark timing of data transmitting, can regards the pulse length for sending a data 0 or 1 of minimum unit as, in some feelings
It can also be used for cooperation under condition and compound modulating mode be provided.Correspondingly, the transmitting terminal data processing module of the present embodiment is completed
Outside the functions such as decoding, coding, encryption, the driving of the prior art, it is also used to control information switching work according to the visible light communication
Operation mode, and generation driving after information coding to be sent, modulation is believed using different adjustment methods according to different working modes
Number, driving signal for controlling visible light synchronous transmitter and visible data transmitter respectively.
Opposite with transmitting terminal, the receiving end of the present embodiment increases uplink signal transmitter and believes for realizing with uplink linght
Uplink linght link communication between number receiver, the uplink optical signal carrying of uplink optical link have an impact transmitting terminal adaptation rate tune
The visible light Communication Control information of molding formula.Because on the one hand the visible data receiver of the present embodiment needs simultaneously that reception can
The image that light-exposed synchronous transmitter and visible data transmitter collectively constitute can be compound modulation letter under some cases
Number, it on the other hand needs to need to the processing for meeting this image according to therefore the present embodiment receiving end data processing module and be
It identifies the ability of visible light signal wherein included, computer connection picture pick-up device acquisition image can be selected, operation is called
The program in the library OpenCV realizes the demodulation of the image procossing and visible light signal of receiving end data processing module.Particularly, another
In a little embodiments, receiving end data processing module may include the video processing core of image-signal processor and neural network recognization
Piece to extract the image of transmitting terminal from from the full visual field imaging of visible data receiver, and decodes information.
The present embodiment in a first aspect, realizing following MIMO imaging visible light communicating step:
Step 101, receiving end data processing module is sent out by uplink signal transmitter to standby mode according to the first request
It penetrates end and sends the uplink optical signal for carrying equipment enabled instruction；
Step 102, transmitting terminal data processing module carries equipment enabled instruction by the reception of uplink signal receiver
After uplink optical signal, transmitting terminal operating mode is cut into low-rate modulated mode.
In some specific embodiments of this aspect, equipment enabled instruction includes for the specified of low-rate modulated mode
To the setting information of transmitting terminal, setting information is to meet the variable data of a communications protocol for modulating mode and transmission rate etc.；
In other specific embodiments of this aspect, transmitting terminal, which has, defaults the preset modulating mode for low-rate modulated mode
And transmission rate, equipment enabled instruction are a fixed signals.
The second aspect of the present embodiment realizes that visible light communicating step is imaged in following MIMO:
Step 201, the transmitting terminal data processing module in low-rate modulated mode will be after information coding to be sent, modulation
The control visible light emitter output coupled by driving signal carries the first data frame of information to be sent, also, controlling can
Light-exposed synchronous transmitter output carries the first optical signal of the alternating mark of the first data frame；
Step 202, receiving end data processing module is according to visible light emitter in visible light receiver and visible phototiming
The image of transmitter imaging judges current visible light link communication quality.
In some specific embodiments of this aspect, information to be sent is the brief data information of transmitting terminal；This aspect other
In specific embodiment, information to be sent is the normal data of visible optical communication in the prior art.
The third aspect of the present embodiment realizes that visible light communicating step is imaged in following MIMO:
Step 301, the transmitting terminal data processing module in low-rate modulated mode will be after information coding to be sent, modulation
The first data frame of information to be sent is carried by the visible light emitter output of driving signal coupling control, also, controlling can
Light-exposed synchronous transmitter output carries the first optical signal of the alternating mark of the first data frame；
Step 302, receiving end data processing module carries first data frame according to visible light receiver is received
It is modulated, decodes with the first picture signal of first optical signal, generate and the consistent reception information of information to be sent.
In some specific embodiments of this aspect, information to be sent is the brief data information of transmitting terminal；This aspect other
In specific embodiment, information to be sent is the normal data of visible optical communication in the prior art.
The fourth aspect of the present embodiment realizes that visible light communicating step is imaged in following MIMO:
Step 401, receiving end data processing module is according to the second request based on to visible light link communication quality evaluation
As a result it generates visible light communication and controls information, and visible light communication control letter is sent to transmitting terminal by uplink optical signal transmitter
Breath；
Step 402, transmitting terminal data processing module is controlled by the received visible light communication of uplink optical signal receiver
Specified modulating mode and transmission rate are extracted after information processing, operating mode are cut into adaptation rate modulating mode, and control
Visible light emitter processed sends the second data frame for carrying information to be sent, meanwhile, control visible light synchronous transmitter is sent
Carry the second optical signal of the sync id of the second data frame.
Step 403, receiving end data processing module carries second data frame according to visible light receiver is received
It is modulated, decodes with the second picture signal of the second signal, generate and the consistent reception information of information to be sent.
The information to be sent of this aspect in certain embodiments can be with the present embodiment second aspect or third party
Information to be sent described in face is context relation or is not context relation.Based on above description it is found that in the present embodiment
Second aspect, the third aspect or fourth aspect individually can realize this aspect in the present invention during an one-way communication
Effect, those skilled in the art can preferably select in terms of wherein at least one partially to realize one embodiment of the invention
The corresponding technical effect of this aspect, technical solution of the present invention include these embodiments with part effect certainly.The present embodiment
For preferred embodiment, in the present embodiment second aspect, the third aspect or fourth aspect can also part at one of the invention be
It is realized on a transmitting terminal/receiving end in system embodiment, receiving end/transmitting terminal corresponding with the transmitting terminal/receiving end then makes
With the different but function from receiving end provided by the invention/transmitting end structure is identical or approximate technical solution, it will be understood that also base
In the technical inspiration that technical solution of the present invention provides.
Embodiment two
The system that the present embodiment is made of two transmitting terminals and a receiving end, the difference with embodiment one be, this
The one aspect of embodiment realizes that visible light communicating step is imaged in following MIMO:
Step 501, receiving end carries operating mode switching command to the two transmitting terminals transmission being in standby
Visible light communication controls information, and operating mode switching command includes equipment enabled instruction；
Step 502, two transmitting terminals are cut into low-rate modulated mode after receiving equipment enabled instruction, meanwhile, hair
Penetrating end data processing module will be exported after information coding to be sent, modulation by the control visible light emitter that driving signal couples
The first data frame of the first information to be sent is carried, also, controls the output of visible light synchronous transmitter and carries the first data frame
Alternating mark the first optical signal；
Step 503, it after receiving end receives first data frame and the first optical signal of two transmitting terminals, demodulates, solve respectively
After code, generates and receive information with two information to be sent of transmitting terminal respective first consistent first；
Step 504, receiving end carries the request of Comparative indices according to one, selects from described two first reception information
It takes one to meet the first of the Comparative indices and receives information, and carry work to the source transmitting terminal transmission of the first reception information
Operation mode switching command and communications rate information uplink optical signal；The Comparative indices can be to receiving multiple transmittings
It include the related parameter of object in low speed information in end, for example the state parameters such as temperature, pressure, quantity are compared, and choose
Maximum or in a certain range in terms of some dimension, for example temperature highest or conduct in range of interest are to be selected adaptive
Answer communication object.
Step 505, for the source transmitting terminal after receiving uplink optical signal, incision meets the communications rate information
Adaptation rate modulating mode, and to receiving end send carry the second information to be sent the second data frame, also, output take
Second optical signal of the sync id with the second data frame；
Step 506, receiving end receives the second light letter of the transmitting terminal of the second optical signal of transmission of the selection of above-mentioned steps 504
After number, after demodulation, decoding, generates and receive information with the second information consistent second to be sent of the source transmitting terminal.
Embodiment three
The present embodiment is by what three transmitting terminals, two receiving ends and a remote control equipment as control terminal formed
System, the difference with embodiment one, embodiment two are explained by following operating procedure.
The present embodiment in a first aspect, realizing following MIMO imaging visible light communicating step:
Step 601, remote control equipment carries operating mode switching command to three transmitting terminal transmissions in standby mode
Visible light communication control information, operating mode switching command includes equipment enabled instruction；
Step 602, three transmitting terminals are cut into low-rate modulated mode after receiving equipment enabled instruction, and simultaneously to
Outer to broadcast the first picture signal for carrying respective brief information, a part of visible light signal of the first picture signal, which carries, to be carried
First data frame of brief information simultaneously broadcasts output by visible light emitter, and another part visible light signal is the first data of carrying
First optical signal of the alternating mark of frame is simultaneously exported by visible light synchronous transmitter synchronized broadcast.
Step 603, after each receiving end receives three respective brief informations of transmitting terminal simultaneously, it is emerging therefrom to choose sense
The transmitting terminal of interest, and uplink optical signal is sent to it, it is desirable that it is transferred to adaptation rate modulating mode, and in Adaptive Modulation mould
The corresponding details of its brief information are returned under formula.Specifically, receiving end carries the request of Comparative indices according to one, from
Choose the source transmitting terminal for meeting the Comparative indices in three brief informations, and to the source transmitting terminal of the brief information
Transmission carries operating mode switching command and communications rate information uplink optical signal；
Step 604, the transmitting terminal of incision adaptation rate modulating mode request is received by uplink optical signal receiver,
Be transferred to adaptation rate modulating mode, and busy mark issued by visible light synchronous transmitter, with refuse other receiving ends to
It sends uplink optical signal again.
Step 605, the second of carrying details are sent according to request into the transmitting terminal of adaptation rate modulating mode
Picture signal, the modulation system of the second picture signal is different from the modulation system of the first picture signal, stackable in the first image
On signal.A part of visible light signal carrying of second picture signal carries the second data frame of details and by visible light number
Exported according to transmitter, another part visible light signal be carry the second data frame sync id the second optical signal and from
The output of phototiming transmitter synchronization.
The second aspect of the present embodiment realizes that visible light communicating step is imaged in following MIMO:
Step 701, after the first receiving end and the second receiving end receive three respective brief informations of transmitting terminal, therefrom
Interested first transmitting terminal is chosen, and uplink optical signal is sent to it, it is desirable that it is transferred to adaptation rate modulating mode.
Step 702, the first transmitting terminal is preferentially received the uplink optical signal of the first receiving end and is transferred to adaptation rate tune
After molding formula, busy mark is issued by visible light synchronous transmitter.
Step 703, the second receiving end receives the busy mark of the first transmitting terminal, then sends uplink to the second transmitting terminal
Optical signal reenters low-rate modulated mode alternatively, the first transmitting terminal is waited to send free mark.
It is thin to illustrate that the present invention provides the technology that technical solution is related to below by specific embodiment based on the above embodiment
Section provides for technical staff for improved inspiration so as to further clear and complete.
Specific embodiment one
As shown in figure 3, the present embodiment is a transmitting terminal, specially portable mobile apparatus, comprising: uplink optical signal connects
Receive device, the visible data transmitter on LED light emitting array and visible light synchronous transmitter, connection uplink optical signal receives
The transmitting terminal data processing module of device and LED light emitting array and transmitting terminal power module for the power supply of above-mentioned component.Transmitting terminal
Data processing module is made of single-chip microcontroller, register, electric power driving module and related circuit, each picture in LED light emitting array
Element can be launched end data processing module and individually control the parameters such as on-off, color and pulse frequency, pulsewidth, brightness.
Specifically, as shown in Figure 4: one end outside transmitting terminal on a face is equipped with infrared sensor as uplink optical signal
Receiver 10；On the LED light emitting array 20 of the Middle face position, there are the LED array elements of three different zones to form visible light number
According to transmitter, three LED array elements are three data array elements 21,22,23；There are two data cells to form for each data array element,
If individual data array element is the arrangement that laterally connects, two data cell longitudinal arrangements.The face and uplink optical signal receiver phase
Pair the other end LED display 20 on, there are the LED array elements of a fixed area as visible light synchronous transmitter, the LED
For array element as a synchronous array element 30, the synchronous long longitudinal row for being greater than visible data transmitter entirety of 30 longitudinal row of array element is long,
To realize the synchronizing redundant in visible data receiver in imaging process, i.e., connect in transmitting terminal with receiving end visible data
Receive the sensor of device direction of line scan do not place it is completely vertical in the case where (have certain lesser angle) and still be able to realize it is same
It is corresponding with data-signal striped to walk signal.In other specific embodiments, uplink optical signal receiver, visible data transmitting
The arrangement mode of device and visible light synchronous transmitter on one face is also possible to arrange from "-" type in the present embodiment different
Rounded projections arranged；Visible data transmitter and visible light synchronous transmitter can be the difference positioned at different LED light emitting arrays
Either array element can be imaged with OLED, LCD etc. that high frequency is shown in the LED array element of shape；Uplink optical signal receiver 10 can be
Infrared sensor or camera etc. can be with the optical-electronic sensors of sensing light；In order to obtain bigger communication bandwidth or higher
Communication quality, it is seen that light data transmitter can also be made of more data matrix members, such as can be multiple lines and multiple rows RGB-
LED constituent element constitutes multiple data array elements.
The present embodiment is after by equipment enabled instruction activation, it is seen that light data transmitter with it is prepared in advance can with it is big absolutely
Most cameras matched transmission mode broadcast (sites) in turn carry the first picture signal of brief information, brief information includes needing
By the characteristic for the details that adaptation rate modulating mode is sent, such as length, priority weight etc. and being carried
Other low speed information (ID of the object of information such as to be transmitted, title, attribute and basic parameter etc.), one in brief information or
Multiple data are used as a specific demonstration of the Comparative indices that receiving end first in step 504 receives information, and first
The modulation system of picture signal is mainly the complex modulated of space pixel modulation and color modulation, simultaneously, it is seen that phototiming transmitting
Device then starts to carry out flash according to a determining driving signal, and flash frequency can be synchronous signal frequency.
At least one function of the present embodiment transmitting terminal is the complex modulated modulated by space pixel with color modulation, will
Brief information is emitted in a manner of visible light signal (such as the first picture signal).The demonstration simplified as one, this implementation
Multiple first data frames are carried on after the brief information segmentation that the transmitting terminal of example is sent, are expressed simultaneously according to visible light emitter
Message length is grouped the first data frame, when every group of corresponding piece image, defines LED light emitting array non-visible light data source
Or the pixel in visible light synchronous transmitter region is black, three primary colours red, green and blue respectively represents 11,10 and 01, each data
One of red, green, blue is presented in array element whole pixel at the time of sending piece image, meanwhile, two up and down in combined data array element
It is conjugated the Push And Release of data cell, can further be modulated to open ShiShimonoseki in red, Shang Guanxia opens to be 011,
111, open ShiShimonoseki in green, Shang Guanxia opens to be 010,110, it is blue on open ShiShimonoseki, Shang Guanxia opens to be
001,101.One of tertiary colours such as purple, Huang are presented to distinguish in synchronous array element whole pixels during sending first data frame
In the color of data array element, different colors is presented when sending two adjacent first data frames to count as first for synchronous array element
It is identified according to the alternating of frame.For example, during sending first data frame being made of 5 width images, synchronous array element shows as purple
Color.After the 5th width image battery has fired, when continuing to send next first data frame, synchronous array element becomes yellow.In low rate
Under modulating mode, it is seen that the effect of the one aspect of phototiming transmitter is to realize the alternating of data frame by the variation of color
Mark.
Pixel modulation in space refers to transmitting terminal using multiple data array elements according to certain spatial form in the present embodiment
Arrangement, it is general can the methods of using end to end or matrix arrangement, each data array element by multiple point light source groups at,
Each data array element can be with on-off, the color, brightness of its inside point light source of independent control.Color modulation refers to every number
Different data encodings is represented by different colors according to array element, conjugate unit refers to two be arranged in each data array element
The luminous array element of above independent control, the luminous total brightness of each conjugate unit remains unchanged in same data array element, can be with
It is presented as that total emission power remains unchanged.It include two conjugate units in each data array element in this specific embodiment, specifically,
In improvement embodiment based on this specific embodiment as shown in Figure 11,12, transmitting terminal include data array element 21,22,23 and
Synchronous array element 30, wherein each data array element includes two conjugate units, and the arrangement of conjugate unit is all such as data cell 21
Shown in conjugate unit 211,212, in modulated process, one of them in each data array element is to connect, such as conjugate unit 211,
Another is disconnects, such as conjugate unit 212；According to the conjugate unit being arranged above and below (relative to data array element or so in Figure 12
For arrangement), coded modulation information is realized using the on-off of upper and lower different location, if only to the conjugate unit of top half 211
For, coding mode is OOK coding.This mode can guarantee that total luminous intensity output is stablized.By above-mentioned multiple colors
The data matrix member of modulation, which combines, just constitutes the complex modulated of space pixel modulation and color modulation, can effectively improve
Light transmission speed.If single color modulation data array element transmission rate is V, and constitutes the data matrix of visible data transmitter
First quantity is N, then theoretically the maximum transfer speed of visible data transmitter is N × V.
The present embodiment transmitting terminal carries the visible light communication control of adaptation rate modulating mode enabled instruction receiving
(enabled instruction includes that a modulation rate v) cuts adaptation rate modulating mode, it is seen that light data transmitting after information processed
Device sends the second picture signal for carrying above-mentioned details with specified modulation rate v by high frequency superposition modulated method.
The high frequency superposition modulated mode of second picture signal can be on-off keying (OOK) modulation, pulse width modulation, pulse spacing tune
The complex modulated of the high frequency modulateds and color modulation such as system, simultaneously, it is seen that phototiming transmitter then starts to pass through according to modulation rate v
On-off keying (OOK) modulation carries out flash and sends sync id, whens sync id is that synchronous array element is issued according to given frequency etc.
Between interval output on-off optical signal, a given way is given by enabled instruction.
At least one function of the present embodiment transmitting terminal is by under adaptation rate modulating mode, by that will carry in detail
Second picture signal of thin information is allowed to be superimposed upon in the first picture signal of low-rate modulation by high frequency modulated output,
That is, under adaptation rate modulating mode, while there is the low frequency of point-to-point unidirectional high frequency visible optical link and One-to-All Broadcast
Visible light link broadcast, so that while high speed unicast details, other receiving end low speed transmissions are simple into system
Want information.The demonstration simplified as one is carried on multiple second after the details segmentation that the transmitting terminal of the present embodiment is sent
Data frame, each second data frame include frame head section, data segment and postamble section, include data array element according to visible light emitter
Quantity the second data frame is grouped, every group is sent by data array element, defines the transmitting of LED display non-visible light data
The pixel in device or visible light synchronous transmitter region is that all light, three data array elements three groups of data of synchronous transmission define it always
Range all light is 1, and going out entirely is 0, then transmits a data of three groups of data in the output period of each switch state respectively.This shows
Second picture signal of the second data frame of carrying of model can be superimposed upon in the first picture signal of above-mentioned the first data frame of carrying.
In some embodiments, example high speed modulator approach is also possible to pulse width modulation, pulse interval modulation etc..
One function of the present embodiment visible light synchronous transmitter is current by the first optical signal identification transmissions end
Communication state.One simplified example is that visible light synchronous transmitter is yellow and indigo color when transmitting terminal is in idle condition
It alternately flashes, when transmitting terminal is in busy condition, visible light synchronous transmitter is that orange or purple alternately flashes.
Another function of the present embodiment visible light synchronous transmitter is to identify current visible light by the second optical signal
The modulation rate v of data source, a simplified example are, when visible data transmitter sends the second number in OOK mode
When according to frame, it is seen that phototiming transmitter synchronous flashing, such as current switch states in a manner of the OOK with fixed modulation rate v
The output period in be all light, then then to go out entirely in the output period of next switch state, thus utilization roller shutter effect line by line
The receiving end of scanning imagery forms light and dark synchronization striped as sync id.
For the present embodiment under low-rate modulated mode, each pixel in a data array element has phase in piece image
The first same pixel value synchronizes second pixel value having the same in a data frame of each pixel in array element.Adaptive
It answers under rate modulation mode, each pixel in one data array element of any moment or a synchronous array element has same pixel
Value.
Specific embodiment two
As shown in figure 5, the present embodiment is receiving end corresponding with transmitting terminal in specific embodiment one, including uplink optical signal
Transmitter, visible data receiver, the zoom system, pancreatic system for adjusting visible data receiver visual field and focal length, adjusting are visible
Light data receiver imaging axis holder, be separately connected control and receive end in each component receiving end data processing module and
For the receiving end power module of each component power supply.Receiving end data processing module includes operating instruction to realize that the present invention relates to function
The necessary hardware device such as computer, camera, cradle head controllor, zoom system, pancreatic system controller of energy.Visible data receiver
Imaging sensor, the lens group of zoom system, pancreatic system and uplink optical signal transmitter are installed using cobasis seat, and carry out optical axis calibrator, are made
It obtains when the imaging of transmitting terminal is located at imaging sensor center, the light beam of uplink optical signal transmitter can point to be believed in uplink linght
Number receiver.Imaging sensor is the sensor that can be realized progressive scan imaging
Specifically, as shown in fig. 6, a face outside receiving end is equipped with camera as visible data receiver
41, camera controls imaging focal length by the focusing system that internal micro machine controls, and is equipped with outside receiving end for adjusting camera
The direction of lens axis and the holder 43 for rotating about the axis angle.The side of camera is made equipped with Infrared Projector on the face
For uplink optical signal transmitter 42.The holder 43 of lower section is for adjusting imaging of the target array element in visible data receiver 41
Position simultaneously constrains to meet the direction condition progressively scanned to target array element camera position.Zoom system, pancreatic system is for adjusting
Imaging area of the target array element in visible data receiver.Target array element includes data array element and synchronous array element.
After the first picture signal for receiving the transmitting terminal of multiple low-rate modulated modes under wide-angle state, receiving end is mentioned
The brief information of each transmitting terminal is taken, and chooses one of them interested transmitting terminal, then adjusts the axis of visible light receiver
Line makes it be directed at the transmitting terminal, and adjust zoom system, pancreatic system the imaging area of the transmitter is adjusted to it is as big as possible.Then measurement with
The communication quality of visible optical link between the transmitting terminal, including modulation rate v.With a simplified example in specific embodiment one
It is corresponding, by one it is simplified illustrate the evaluation method of modulation rate v, as shown in fig. 7, being connect to transmitting terminal in visible light
Coordinate is established in the imaging for receiving imaging sensor 44 in device, and X is that laterally, Y is longitudinal；If x, y are respectively single target array element can
The lateral number of pixel unit occupied by light-exposed receiver imaging sensor 44 and longitudinal number, target each for transmitting terminal
Size of the array element on imaging sensor 44 is x × y.The then maximum data that visible optical link piece image can transmit at this time
Dimensions length is y pixel.If the second picture signal is modulated using OOK method, it is contemplated that the minimum fringes of modulation want energy
It is enough that detection is covered by the minimum pixel of camera, therefore, minimum fringes is taken to be at least 2 times of minimum pixel.If entire imaging
44 size Y-direction of sensor is C pixel unit, then in the cycle T s of piece image output, transmission data are with y/2C
The period of × Ts, frequency are that f=2C/ (y × Ts) progress 2C/y times (equal round numbers after all digital operations herein) circulation is broadcast
The coded modulation put, if entire transmitting terminal has N number of array element, each array element is synchronized with information of the above-mentioned rate to itself and is followed
Ring coding is sent, then maximum transfer speed is the every cycle of images of N × y/2bit.The pulse interval of minimum data striped is t0
=2/C*Ts.
The function of the one aspect of the present embodiment receiving end further include: be in adaptation rate modulating mode in transmitting terminal
When, it is seen that light data receiver is imaged using exposure mode line by line, to obtain the second figure being superimposed upon in the first picture signal
As signal, the visible data receiver of receiving end receives transmitting terminal after the picture signal that a moment is presented, life can be imaged
It at piece image, can be decoded, then splice to obtain complete information field by the coding of multiple data array elements.With tool
A simplified example is corresponding in body embodiment one, as shown in figure 8, need to pass through for the transmitting terminal using OOK modulator approach
Holder constrains to meet the direction condition of progressive scan camera position: i.e. the direction of camera progressive scan need to be along Y
Axis direction scans from top to bottom or from bottom to top, can obtain the light and shade striped in Fig. 7.Its principle is that transmitting terminal is in adaptive
When answering rate modulation mode, receiving end is using exposure mode line by line, due to each data array element of visible data transmitter
High speed flickering, then the image of each data array element will show the light and dark striped of a line a line in imaging process, i.e.,
Roller shutter effect.Since the details of transmitting terminal transmission are cut according to the sending cycle of each second data frame, subpackage, the
The sending cycle of two data frames is to receive and generate the period of time T of piece image in second graph signal.If desired it transmits
Data are Mbit, and the data that the sending cycle of each second data frame can emit are m bit (bit), then need to transmit
Data are cut to n=M/m (round up number) a second data frame, and each second data frame sending cycle successively emits a picture number
According to needing n the second data frame sending cycles being capable of battery has fired.Its format of the data information of each data frame period is frame head
Section, data segment and postamble section.Frame head section is the opening flag of the frame and the number (information comprising totalframes n) for recording frame, frame
Endpiece is as end of identification and as verification.When receiving end receives the second picture signal, by the frame data of the n frame received
Frame head and postamble are removed, is stitched together, the complete details of the second picture signal carrying have just been obtained.Due to visible phototiming
Transmitter is modulated in such a way that a modulation rate v is by OOK always under adaptation rate modulating mode, in the receiving end at
It is the striped of one group of light and shade at equal intervals, i.e. sync id as after.The frequency of sync id on-off frequency and data array element keeps one
It causes, on the piece image that remotely generation is imaged in receiving end, it is alternate at equal intervals that sync id should be light and shade under roller shutter effect
One group of striped, the visible light receiver of receiving end pass through the on-off frequency of the synchronous array element of the strip extraction sampled line by line.
The striped of sync id when engrave and mentioned-above visible data emitter data array element 21,22,23 one-tenth
The striped that picture generates has stringent corresponding relationship, and since progressive scan is imaged, then the imaging pixel of every a line is in the same time
Exposure, therefore, the light and shade striped data of obtained sync id are the data array element imaged striation for identifying the row on the row
Light/dark corresponding data.When extracting the data of the every row striped of data array element, on the basis of sync id, marked synchronous
Know the row that striped is dark line and extract data, then the data are odd bits, extract data in the row that synchronous striped is bright line, then the number
According to for even bit.These data are rearranged according to different data array element, correspond to 1 in plain text, dark line corresponds to 0, then goes
Except frame head section postamble section, binary data field is obtained after being spliced, is then decoded the information needed.Such as hair
It penetrates end and carries out character code, the then coding that several width images within the same data frame can will decode using ASCII character
Field is spliced, to obtain complete ascii character.
Specific embodiment three
As shown in figure 9, the present embodiment is transmitting terminal 51,52,53 as three as described in specific embodiment one and as specific
The system of the composition of receiving end 61,62 described in embodiment three, further includes a remote control equipment, is an One-to-All Broadcast communication system
System.Transmitting terminal 51,52,53 is respectively positioned on the visible data receiver of receiving end 61,62 within sweep of the eye, i.e., receiving end 61 or
Receiving end 62 can receive the visible light signal of the transmission of transmitting terminal 51,52,53 simultaneously, but in the initial state, receiving end 61,
62 axis is not specifically towards one of transmitting terminal 51,52 or 53.
The one aspect of the present embodiment is for realizing following functions: as shown in Figure 10, the imaging sensor 44 of receiving end 61
The imaging that the visual field includes transmitting terminal 51,52 and 53, the position being imaged according to each transmitting terminal are adjusted to by zoom system, pancreatic system and holder
It sets, the data decoded can accomplish the MIMO one-way communication under low rate state, be suitable for its location matches in space
The transmission of brief information.Brief information generally according to most of receiving ends reception capabilities setting transmission speed and mode, due to
The general general receiving velocity of consumer level camera is no more than 30 to 60 frames/second, and according to Nyquist theorem, transmitting terminal is wanted
Accomplish that undistorted transmission information will then be emitted with the half of receiving end receiving velocity, the image transmitted under transmitting terminal low rate state
Rate should be no more than 15 frames/second.The modulation system of visible light communication signal mainly has ON-OFF keying modulation, color modulation, pulse
Width modulated, the modulation systems such as pulse interval modulation.It is in the similar other embodiments of the present embodiment, a difference is,
System Working Principle is identical as traditional visible light communication system under low-rate modulated mode.
When the present embodiment low-rate modulated mode communication, uplink optical signal transmitter makes to emit for issuing enabling signal
End is switched on and is started with the work of adaptation rate modulating mode.
For the present embodiment when adaptation rate modulating mode communicates, each receiving end needs a corresponding transmitting terminal.Such as
When the corresponding 61 adaptation rate modulating mode of receiving end of transmitting terminal 51 communicates, transmitting terminal 52 or 53 can only correspond to the progress of receiving end 62
The communication of adaptation rate modulating mode.
In the present embodiment, uplink optical signal transmitter makes system have adaptation rate differentiation to one-way visible optical link
Function, uplink optical signal receiver make system have adaptation rate modulation overlaying function to one-way visible optical link.
The means of communication of the present embodiment one aspect include the following steps:
Step 801, remote control equipment sends activation signal, activation letter to three transmitting terminals 51,52,53 in standby mode
It number is the optical signal for meeting such as infrared remote control NEC agreement specific data coding, containing switch command information in activation signal, together
Walk the parameters such as signal period information；
Step 802, the internal component of transmitting terminal 51,52 and 53 is transferred to working condition, and passes through respective VISIBLE LIGHT EMISSION
First picture signal of device broadcast bearer brief information.For transmitting terminal of the present invention, the modulation system of brief information is space
The complex modulated of pixel modulation and color modulation, wherein spatial modulation shows as being total to for each data array element and composition data array element
Conjugate data unit meets certain rule on spatial position is placed, and realizes modulation with the on-off of different luminescence units.At the same time,
The visible light synchronous transmitter of each transmitting terminal then starts to carry out flash according to the synchronous signal cycle frequency that activation signal inputs
Export the sync id of ON-OFF keying modulation.
Step 803, under low-rate modulation mode, receiving end 61 or 62 receive transmitting terminal 51,52 and 53 send it is brief
Information, when need to some VISIBLE LIGHT EMISSION end is interested need to further appreciate that details when, it is necessary to built with it
Vertical adaptation rate modulates interface channel.Specifically, receiving end 61 needs to further appreciate that the details of transmitting terminal 51, then will
Receiving end 61, which controls holder, makes that axis alignment transmitting terminal 51 is imaged, and the imaging of transmitting terminal 51 is made to be located at 61 imaging sensor of receiving end
Center, and by zoom system, pancreatic system adjust focal length, make the imaging of transmitting terminal 51 be full of as far as possible receiving end 61 imaging pass
The visual field of sensor effective sensitization area namely imaging sensor.Specifically, brief information can be the several of information description object
Attribute, if information statement object is a book, brief information can be the title of the book, publishing house, author, abstract etc., in detail
Thin information is full content of the school bag containing brief information；If information description object is engine operating condition parameter, brief information can
To be fault condition code, key index etc., details can be whole engine operating condition parameters.Receiving end 61 receives multiple hairs
After penetrating the first optical signal of the carrying above- mentioned information at end, according to pre-configuration or one selection request carry Comparative indices,
It chooses interested transmitting terminal and switches the transmitting terminal to adaptation rate modulating mode to obtain accordingly using uplink optical signal
Details.
Data processing module driving in receiving end is adjusted the angle with the holder that motor is adjusted in the present embodiment, passes through electronic horse
Focus adjustment is carried out up to driving imaging system, and is aligned and is amplified by zoom system, pancreatic system, transmitting terminal 51 is made to be located at main view
Wild center simultaneously until is amplified to full of the visual field.In other embodiments, can by manually adjust receiving end position,
Angle and distance, and make the uplink optical signal receiver of the uplink optical signal transmitter alignment transmitting terminal 51 of receiving end 61, into one
Step, can increase airborne laser range finder on receiving end 61 with obtain between receiving end 61 and transmitting terminal 51 apart from information, it is sharp
Ligh-ranging device can integrate in uplink optical signal transmitter, and range information can be used for the purposes such as auxiliary adjustment zoom.Specifically,
The composition of brief information be it is such, brief information is made of initial frame, data frame.The beginning of initial flag of frame epicycle communication,
Initial frame carries some master datas of transmitting terminal 51 simultaneously, such as array element quantity, the color category etc. of array element color modulation.It sends
When initial frame, each data array element must be with different Essential colour colour light emittings, to facilitate receiving end clearly to tell transmitting terminal 51
Each data array element；Synchronous array element will issue optical signal simultaneously, and color must distinguish between in data array element optical signal, can be
It is composite coloured.Initial frame is fixed as a kind of picture structure according to the above principle, and such as three array elements are arranged with red blue green, along with same
The combination frame structure that step array element is lighted, the detection algorithm that receiving end is written is, when receiving end once detects that synchronous array element is lighted
Data array element lights arrangement with red blue green simultaneously, then is judged as initial frame, and on the one hand initial frame can be transmitted with flag data starts,
It can also be identified simultaneously by initial frame, orient the visible light synchronous transmitter of transmitting terminal and the position of visible data transmitter
It sets, to help next data to carry out reception interpretation.
Step 804, if it is idle state that receiving end 61, which receives transmitting terminal 51, believed by the uplink linght of receiving end 61
Number transmitter provides Adaptive Modulation mode communication enabling signal, it is seen that the uplink optical signal receiver of light emitting end 2 receives
After start Adaptive Modulation.Starting information and modulation rate information are contained in the signal of transmitting.
Step 805, transmitting terminal 51 sends carrying in detail by adaptation rate modulating mode according to the request of receiving end 61
Second picture signal of information, and send busy condition signal.Preferably, the synchronous hair of the present embodiment adaptation rate modulating mode
The first image for sending the first picture signal being superimposed with the second picture signal that can continue to transmitting terminal 51 so as to receiving end 62
Signal.
Specifically, transmitting terminal 51 is according to can be based on matched maximum rate, to message to be launched in uplink optical information
Information is encoded under rate matched state, the low speed signal broadcast (sites) in turn letter that superposition modulated to visible light emitter issues
Number, i.e., in a part of the first picture signal, high frequency is carried out on the color modulation signal of the image of single first picture signal
Rate superposition modulated, single frame are Polaroid picture structure of single time point.The uplink signal transmitter of receiving end is to open
The frequency f of key control OOK modulate emission is the optical signal for the maximum frequency that receiving end is calculated by above-mentioned algorithm, it is seen that light emitting
The uplink signal receiver at end is broadcast after the signal for receiving uplink transmitter according to the tranmitting frequency f of uplink transmitter circulation
This frame data is reported, while synchronous transmitter is according to the minimum interval t of transmitted minimum data striped0It sends and synchronizes at equal intervals
Optical signal.It, can be [0, t by taking the synchronous optical signal of the signal being made of data 0 with data 1 as an example0] period transmission data 1, [t0,
2t0] period transmission data 0, [2t0,3t0] period transmission data 1 ... so circulation.
In further embodiments, uplink signal transmitter can be visible light emitter, in these embodiments, uplink
Signal projector, come cross fire, is changed, it is assumed that odd using no less than two kinds of colors with controlling the cycle of images of transmitting terminal transmitting
Number frame is purple, and even frame is indigo color, and after receiving end receives a frame image, then receiving end controls uplink signal transmitter
Turn colors.Transmitting terminal recognizes the circulation casting for starting next frame cycle data after color change, until uplink transmitter
Color change again.
During entire high-speed communication, which is in occupied state, and synchronous signal transmitter sending has
It can not identified in the occupied signal of original state and by other receiving ends, other imaging receiver ends can only receive it and be broadcast to
Low speed signal, be not available for high-speed communication.
Step 806, receiving end 61 is superimposed with the first picture signal and the second picture signal receive transmitting terminal 51
After single image, the light and shade striped of the frame is extracted.Light and shade striped includes two parts, and a part is the synchronization bar for carrying sync id
Line, another part are the data stripes for carrying detail information data.
As shown in figure 4, the first striped is greater than the second striped on longitudinal size, longitudinal size is it can be appreciated that receiving
The line number of occupied imaging pixel is held on 61 imaging sensors, number is completely covered with meet in single frame time sync id
According to the image height of array element.When receiving end 61 progressively scan interval it is fixed when, the first striped be always it is light and dark at equal intervals,
This is because the fixation refreshing frequency f/2 that the flash frequency of synchronous array element is given by uplink optical signal transmitter is determined, due to
High frequency progressively scans image-forming principle, and light and shade item at equal intervals is presented in the received image of imaging end 61 in the synchronization array element of transmitting terminal 51
Line.
Second striped when engrave and have stringent corresponding relationship with the first striped, since imaging sensor is to sweep line by line
It retouches, then the imaging pixel of every a line is in same Time Exposure, therefore, the light and shade fringe number of obtained second striped on the row
According to the data for being the first striped light/dark corresponding moment with the row.When extracting data from image, with the first striped
On the basis of, data are extracted in the row that the first striped is dark line, then the data are odd bits, are extracted in the row that the first striped is bright line
Data, then the data are even bit.By these data permutations, 1 is corresponded in plain text, dark line corresponding 0.By to binary data
Arrangement, can arrange frame head be 1111 mark start, be then frame number, format be total N frame in n-th frame, follow hard on for
Data bit is then postamble, i.e., parses partial data from image.
Step 807, after completing communication, receiving end 61 is released order by the sending of uplink optical signal transmitter, then is emitted
The high-speed communication of adaptation rate modulating mode is completed at end 51, is restored to low-rate modulated mode, the visible light of transmitting terminal 51 is same
Step transmitter shows the signal that itself is idle state.At this point, receiving end 62 can be by its uplink optical signal transmitter with transmitting
High-speed communication is established at end 51 again.
The means of communication of the present embodiment other side include the following steps:
Step 901, receiving end 62 receives the busy condition signal of 51 visible light synchronous transmitter of transmitting terminal sending, specifically
, it can be the different colours of visible light synchronous transmitter to distinguish idle state and busy condition.
Step 902, receiving end 62 need to wait for other receivers with transmitting terminal 51 communication finish and revert to idle state after,
Uplink optical signal is sent to transmitting terminal 51 to obtain details.
With above-described embodiment and specific embodiment using it is successively progressive, from generally to describing by the way of special, described " first
The descriptions such as data ", " first information ", " the first signal " are to distinguish with " the second data ", " the second information ", " second signal "
Universal can be specially in a particular embodiment " instruction ", " letter according to function in same system operating procedure respectively
Want information ", " picture signal " etc., it is clear that the basic common sense based on Principle of Communication can have in other embodiments of the present invention
Meet different specific agreements and specific " data " of communication flow, " information ", " signal ".Particularly, " optical signal " refers to is with light
The signal of carrier, " visible light signal " refer exclusively to the signal using visible light as carrier, and " picture signal " is the packet for being carried on visible light
Include the signal of one or multiple image.Particularly, skilled in the art realises that, the demodulation method for signal is its modulation methods
The inverse process of method, when modulator approach is clear, corresponding demodulation method is also specific.Meanwhile ideal according to the present invention
Embodiment is enlightenment, and through the above description, those skilled in the art completely can be without departing from technical thought of the invention
In the range of, carry out various changes and amendments.Technical scope of the invention is not limited to the contents of the specification, and is answered
When the protection scope for determining that the present invention advocates according to scope of the claims combination specification explanation.
Claims (10)
1. visible light communication transmitting terminal is imaged in a kind of MIMO characterized by comprising uplink optical signal receiver, for receiving
The uplink optical signal of visible light communication control information is carried, operating mode is carried in the visible light communication control information and cuts
Change instruction or communications rate information；Transmitting terminal data processing module, for controlling information according to the visible light communication
Switching working mode or to generating driving signal after information coding to be sent, modulation；Visible data transmitter is used for root
The first data frame is sent by visible optical link under low-rate modulated mode according to driving signal, and/or, in adaptation rate tune
The second data frame is sent by visible optical link under molding formula；Visible light synchronous transmitter is used for according to driving signal in low speed
The first optical signal for carrying the alternating mark of the first data frame is sent under rate modulating mode by visible optical link, and/or, In
The second optical signal for carrying the sync id of the second data frame is sent under adaptation rate modulating mode by visible optical link；
Wherein, the first data frame and the first optical signal are carried on the first picture signal, and the second data frame and the second optical signal are carried on
Two picture signals.
2. visible light communication transmitting terminal is imaged in MIMO according to claim 1, it is characterised in that: the visible light communication control
Synchronous signal cycle information is carried in information processed, the operating mode switching command includes equipment enabled instruction.
3. visible light communication transmitting terminal is imaged in MIMO according to claim 1, it is characterised in that: the visible data hair
Emitter includes data array element, and each data array element includes multiple conjugate units, orientation and the data array element of conjugate unit
Orientation is orthogonal；And/or the visible light synchronous transmitter includes synchronous array element, synchronous array element is light emitted strong when being connected
Degree is equal to the summation of the emitted luminescence intensity of whole conjugate units in said one data array element.
4. visible light communication transmitting terminal is imaged in MIMO according to claim 1, it is characterised in that: the first image signal
And/or second the modulator approach of picture signal be complex modulated, a part of the complex modulated using the modulation of space pixel,
ON-OFF keying modulation, color modulation, pulse width modulation or pulse interval modulation.
5. visible light communication receiving end is imaged in a kind of MIMO characterized by comprising visible data receiver, for passing through
It can be seen that optical link the first data frame is received under low-rate modulated mode and carry the first data frame alternating mark first
Optical signal, and/or, the second data frame is received under adaptation rate modulating mode and carries the sync id of the second data frame
The second optical signal；Receiving end data processing module, for carrying first data frame and first optical signal
First picture signal generates visible light communication control information after being modulated, decoding, and/or, to carrying second data
Second picture signal of frame and second optical signal generates after being demodulated, being decoded and receives information；The visible optical communication control
Operating mode switching command or transmission communication transmission rate information are carried in information processed；Uplink optical signal transmitter, for sending
Carry the uplink optical signal of visible light Communication Control information.
6. visible light communication receiving end is imaged in MIMO according to claim 5, it is characterised in that: including zoom system, pancreatic system, use
In imaging surface of the target array element of adjustment the first picture signal of transmission and/or the second picture signal in visible data receiver
Product；And/or including holder, for adjusting the target array element for sending the first picture signal and/or the second picture signal in visible light
Imaging position in data sink.
7. visible light communication receiving end is imaged in MIMO according to claim 5, it is characterised in that: the first image signal
And/or second the demodulation method of picture signal be compound demodulation, a part of the compound demodulation using the demodulation of space pixel,
On-off keying demodulation, color demodulation, pulse width demodulation or pulse spacing demodulation.
8. visible light communication receiving end is imaged in MIMO according to claim 5, it is characterised in that: the visible light communication control
Synchronous signal cycle information is carried in information processed, the operating mode switching command includes equipment enabled instruction.
9. visible light communication system is imaged in a kind of MIMO, it is characterised in that: described in any item including such as Claims 1-4
Visible light communication transmitting terminal is imaged in MIMO and visible light communication receiving end is imaged in such as described in any item MIMO of claim 5 to 8,
The MIMO imaging visible light communication transmitting terminal is connected with the MIMO imaging visible light communication receiving end by visible optical link
It connecing, the visible optical link is used for transmission the first optical signal that carrying carries the alternating mark of the first data frame, and/or, it holds
Carry the second optical signal of the sync id with the second data frame.
10. visible light communication system is imaged in MIMO according to claim 9, it is characterised in that: including control terminal, for
The MIMO imaging visible light communication transmitting terminal sends the visible light communication control information for carrying operating mode switching command.
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