CN105471506B - Visible ray method of mobile communication, sending ending equipment, receiving device and system - Google Patents
Visible ray method of mobile communication, sending ending equipment, receiving device and system Download PDFInfo
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- CN105471506B CN105471506B CN201610049363.3A CN201610049363A CN105471506B CN 105471506 B CN105471506 B CN 105471506B CN 201610049363 A CN201610049363 A CN 201610049363A CN 105471506 B CN105471506 B CN 105471506B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/114—Indoor or close-range type systems
- H04B10/116—Visible light communication
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Abstract
The application provides a kind of visible ray method of mobile communication, sending ending equipment, receiving device and system, and method includes：Transmission data are subjected to serioparallel exchange and obtain the master data information of first layer, and the data symbol information of the second layer；Determine the current channel matrix of receiving device；It is determined that first LED lamp strong with the correlation of channel matrix, and the second LED lamp that correlation is weak；Identical symbolic information in the master data information of first layer and second layer information is subjected to linear superposition, the first LED lamp is transmitted identical master data information, and transmit the identical symbolic information in a manner of diversity transmission；And the master data information of the first layer symbolic information different from second layer information is subjected to linear superposition, the second LED lamp is transmitted identical master data information, and the different symbolic information is transmitted with multiplexing transmission mode.The visible ray method of mobile communication of the application is applicable to multi-User Indoor mobile communication.
Description
Technical field
The present invention relates to communication technical field, and in particular to a kind of visible ray method of mobile communication, sending ending equipment, reception
End equipment and system.
Background technology
Visible light communication (Visible Light Communication, VLC) refer to light by the use of visible light wave range as
The communication technology of information carrier；Indoor visible light communication is application of the visible light communication technology on indoor high-speed communication is realized,
Indoor visible light communication is mainly using IM/DD (intensity modulated/directly detect) technology, to realize that indoor " last rice " is logical at a high speed
Letter brings hope.
At present, many researchers are directed to realizing that indoor high-speed communicates using visible ray MIMO (multiple-input, multiple-output) technology, but
For visible light communication link mainly based on line-of-sight transmission, this causes visible ray mimo channel to have strong correlation；And interior can
There can be multiple users to be communicated, and the position of each user is not fixed, this is resulted in when interior has multiple users
When being communicated, due to the difference of each user present position, respective channel matrix that each user is possessed simultaneously differs,
Therefore realize that the effect of the mobile communication of multi-User Indoor is unsatisfactory at present with single MIMO technology, thereby increases and it is possible to exist and be difficult to reality
The situation of the mobile communication of existing multi-User Indoor；
Based on this, there is provided a kind of visible ray method of mobile communication suitable for multi-User Indoor mobile communication, become this
The problem of art personnel need to consider.
The content of the invention
In view of this, the embodiment of the present invention provides a kind of visible ray method of mobile communication, sending ending equipment, receiving device
And system, with suitable for multi-User Indoor mobile communication.
To achieve the above object, the embodiment of the present invention provides following technical scheme：
A kind of visible ray method of mobile communication, applied to sending ending equipment, methods described includes：
Transmission data are subjected to serioparallel exchange and obtain dual-layer data, the dual-layer data includes：The master data of first layer
Information, and the data symbol information of the second layer；
It is determined that the channel matrix that the receiving device for receiving the transmission data is current；
At least one first LED lamp for meeting first condition in LED lamp with the correlation of the channel matrix is determined,
And meet at least one second LED lamp of second condition with the correlation of the channel matrix, wherein the first LED lamp and institute
The correlation for stating channel matrix is better than the second LED lamp and the correlation of the channel matrix；
Identical symbol in the master data information of the first layer and the data symbol information of the second layer is believed
Breath carries out linear superposition, and is sent at least one first LED lamp, so that at least one first LED lamp transmission
Identical master data information, and the identical symbolic information is transmitted in a manner of diversity transmission；
And by the master data information of the first layer symbol different from the data symbol information of the second layer
Information carries out linear superposition, and is sent at least one second LED lamp, so that at least one second LED lamp passes
Defeated identical master data information, and the different symbolic information is transmitted with multiplexing transmission mode.
Optionally, if the current channel matrix of receiving device is H, LED lamp has NtIndividual LED lamp；The determination
Meet at least one first LED lamp of first condition in LED lamp with the correlation of the channel matrix, and with the channel
At least one second LED lamp that the correlation of matrix meets second condition includes：
Determine effective order r of channel matrix H；
Determine NtN in individual LED lampt- r LED lamps are the first LED lamp, and r LED lamp is the second wick.
Optionally, if channel matrix H is H=(h1, h2... hNt), hiFor the column vector of channel matrix H, a column vector pair
Answer a LED lamp；The then determination NtN in individual LED lampt- r LED lamps be the first LED lamp, and r LED lamp is the
Two wicks include：
The correlation of any two column vector is determined, obtains the correlation matrix of any two column vector；
In the correlation matrix of identified any two column vector, determine that the maximum r-1 of correlation matrix, will to column vector
The r-1 is defined as the first LED lamp to LED lamp corresponding to column vector, by NtOther LED lamps are true in individual LED lamp
It is set to the second LED lamp.
Optionally, methods described also includes：
The cycle T of a user symbol information will be transmitted, N number of transmission time slot is divided into according to the communication network users upper limit,
The corresponding transmission time slot of one user；
Make at least one first LED lamp on the corresponding transmission time slot of the receiving device, transmit identical
Master data information, and the identical symbolic information is transmitted in a manner of diversity transmission；And
Make at least one second LED lamp on the corresponding transmission time slot of the receiving device, transmit identical
Master data information, and the different symbolic information is transmitted with multiplexing transmission mode.
The embodiment of the present invention also provides a kind of sending ending equipment, including：
LED lamp；
Serial-parallel conversion circuit, dual-layer data is obtained for transmission data to be carried out into serioparallel exchange, the dual-layer data includes：
The master data information of first layer, and the data symbol information of the second layer；
The modulation circuit being connected with the serial-parallel conversion circuit, for determining to receive the receiving device for transmitting data
Current channel matrix；Determine to meet at least one the first of first condition in LED lamp with the correlation of the channel matrix
LED lamp, and meet with the correlation of the channel matrix at least one second LED lamp of second condition, wherein the first LED
The correlation of wick and the channel matrix is better than the second LED lamp and the correlation of the channel matrix；
The linear superposition device being connected with the modulation circuit and the LED lamp, for by the basic number of the first layer
It is believed that breath carries out linear superposition with the identical symbolic information in the data symbol information of the second layer, and described in feeding at least
One the first LED lamp；And by the data symbol information of the master data information of the first layer and the second layer not
Same symbolic information carries out linear superposition, and is sent at least one second LED lamp；
The first LED lamp in the LED lamp, for transmitting identical master data information, and with diversity transmission side
Formula transmits the identical symbolic information；
The second LED lamp in the LED lamp, for transmitting identical master data information, and with multiplexing transmission side
Formula transmits the different symbolic information.
Optionally, if LED lamp has NtIndividual LED lamp, the current channel matrix of receiving device are H, H=(h1,
h2... hNt), hiFor the column vector of channel matrix H, the corresponding LED lamp of a column vector
The modulation circuit is specifically used for, and determines the correlation of any two column vector, obtains any two column vector
Correlation matrix；In the correlation matrix of identified any two column vector, the maximum r-1 of correlation matrix is determined to column vector,
The r-1 is defined as the first LED lamp to LED lamp corresponding to column vector, by NtOther LED lamps in individual LED lamp
It is defined as the second LED lamp.
Optionally, the sending ending equipment also includes：
Time slot distribution circuit, for the cycle T of a user symbol information will to be transmitted, drawn according to the communication network users upper limit
It is divided into N number of transmission time slot, the corresponding transmission time slot of a user；First LED lamp is controlled in the receiving device
On corresponding transmission time slot, identical master data information is transmitted, and the identical symbol letter is transmitted in a manner of diversity transmission
Breath, and, control second LED lamp to transmit identical master data on the corresponding transmission time slot of the receiving device
Information, and the different symbolic information is transmitted with multiplexing transmission mode.
The embodiment of the present invention also provides a kind of visible ray method of mobile communication, based on visible ray mobile communication described above
Method, methods described are applied to receiving device, and methods described includes：
The optical signal that detection sending ending equipment is sent, and be converted to electric signal；
The electric signal and noise are subjected to linear superposition；
Linear superposition result is carried out to detect decoding processing, obtains decoding result；
Parallel-serial conversion is carried out according to the decoding result, obtains transmitting data.
The embodiment of the present invention also provides a kind of receiving device, including：
Optical signal detector, the optical signal sent for detecting sending ending equipment, and be converted to electric signal；
The superimposer being connected with the optical signal detector, for the electric signal and noise to be carried out into linear superposition；
The decoding circuit being connected with the superimposer, for carrying out linear superposition result to detect decoding processing, translated
Code result；
The parallel-to-serial converter being connected with the decoding circuit, for carrying out and going here and there to turn according to the decoding result
Change, obtain transmitting data.
The embodiment of the present invention also provides a kind of visible ray GSM, including sending ending equipment described above, and
Receiving device described above.
Based on above-mentioned technical proposal, the embodiment of the present invention double-deck can be superimposed coded system transmission signal, and can basis
The current channel matrix of receiving device adjusts the diversity and multiplexing scheme of the second layer signal in double-deck superposed signal, to send out
The diversity multiplexed combinations mode of the second layer of LED lamp, channel matrix that can be current with sending ending equipment are mutually fitted in sending end equipment
Should, so as to overcome channel matrix to change the influence to indoor visible light communication, realize that visible ray mobile communication project is more to interior
User's mobile communication scene is applicable.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is the schematic diagram of the visible ray mobile communication process of sending ending equipment side provided in an embodiment of the present invention；
Fig. 2 is the flow chart of visible ray method of mobile communication provided in an embodiment of the present invention；
Fig. 3 is the schematic diagram of multi-User Indoor mobile communication；
Fig. 4 is the code word schematic diagram of two layer signals；
Fig. 5 is the schematic diagram for eliminating influence of the channel matrix to indoor visible light mobile communication；
Fig. 6 is another flow chart of visible ray method of mobile communication provided in an embodiment of the present invention；
Fig. 7 is that transmission time slot divides and distributed schematic diagram；
Fig. 8 is the structured flowchart of sending ending equipment provided in an embodiment of the present invention；
Fig. 9 is the schematic diagram of the visible ray mobile communication process of receiving device side provided in an embodiment of the present invention；
Figure 10 is another flow chart of visible ray method of mobile communication provided in an embodiment of the present invention；
Figure 11 is the structured flowchart of receiving device provided in an embodiment of the present invention；
Figure 12 is that the process of visible ray GSM provided in an embodiment of the present invention progress visible ray mobile communication is shown
It is intended to.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Below with the angle of sending ending equipment, visible ray method of mobile communication provided in an embodiment of the present invention is situated between
Continue, Fig. 1 is the schematic diagram of the visible ray mobile communication process of sending ending equipment side, and Fig. 2 is transmission provided in an embodiment of the present invention
The flow chart of the visible ray method of mobile communication of end equipment side, it is provided in an embodiment of the present invention visible with reference to shown in Fig. 1 and Fig. 2
Light method of mobile communication can include：
Step S100, transmission data are subjected to serioparallel exchange and obtain dual-layer data, the dual-layer data includes：First layer
Master data information, and the data symbol information of the second layer；
Optionally, the process of serioparallel exchange may be considered the transfer process of the transmission data of bit-level, will pass all the way
Transmission of data is converted to multichannel data, it is therefore intended that realizes MIMO transmission using multiple LED lamps in LED lamp, can specifically incite somebody to action
The stream compression of transmission data turns to the master data information of first layer and the data symbol information of the second layer.
Step S110, the current channel matrix of the receiving device for receiving the transmission data is determined；
When be present multiple users in interior communicated, due to the difference of different user present position, and each user
Position is not fixed, therefore channel matrix corresponding to each user's each moment may and differ, indoor multi-purpose as shown in Figure 3
The schematic diagram of family mobile communication；
Therefore when carrying out indoor visible light mobile communication, sending ending equipment need to be determined to receive and be somebody's turn to do before it need to transmit data
Transmit the channel matrix of receiving device (a corresponding reception user) current feedback of data；
Optionally, indoor each receiving device can uninterruptedly carry out channel estimation, when learning that channel matrix is become
During change, current channel matrix can be fed back to sending ending equipment, to cause receiving device that sending ending equipment determines current
Channel matrix is in last state；Obviously, indoor each receiving device can uninterruptedly carry out channel estimation, and will be estimated in real time
The channel matrix feedback of meter is to sending ending equipment, to cause at the current channel matrix of the receiving device that sending ending equipment determines
In last state；
In embodiments of the present invention, each LED lamp in LED lamp transmits two layer signals, the first layer signal transmitted
The master data information of the first layer obtained for above-mentioned serioparallel exchange, and the data symbol information of the second layer transmitted is by basis
Correlation between LED lamp and channel matrix adjusts diversity and multiplexing transmission strategy.
Step S120, determine to meet at least one the of first condition in LED lamp with the correlation of the channel matrix
One LED lamp, and meet with the correlation of the channel matrix at least one second LED lamp of second condition, wherein first
LED lamp and the correlation of the channel matrix are better than the second LED lamp and the correlation of the channel matrix；
Meet at least one first LED lamp of first condition, can have by force with the channel matrix in LED lamp
The LED lamp of correlation；Meet at least one second LED lamp of second condition, can be in LED lamp with the channel square
The weaker LED lamp of correlation of battle array；
There is the first LED lamp of strong correlation with the channel matrix, can be in the data symbol letter of the transmission second layer
During breath, the identical symbolic information in the data symbol information of the second layer is transmitted in a manner of diversity transmission；With the channel
The second weaker LED lamp of the correlation of matrix, can be when transmitting the data symbol information of the second layer, with multiplexing transmission mode
Transmit the different symbolic information in the data symbol information of the second layer.
Step S110 and step S120 process may be considered the modulated process shown in Fig. 1.
Step S130, it is the master data information of the first layer is identical with the data symbol information of the second layer
Symbolic information carry out linear superposition, and at least one first LED lamp is sent into, so that at least one first LED
Wick transmits identical master data information, and the identical symbolic information is transmitted in a manner of diversity transmission；And by described
One layer of the master data information symbolic information different from the data symbol information of the second layer carries out linear superposition, and
Be sent at least one second LED lamp so that at least one second LED lamp transmission identical basic number it is believed that
Breath, and the different symbolic information is transmitted with multiplexing transmission mode.
In embodiments of the present invention, LED lamp when transmitting optical signal, transmit identical by each LED lamp in LED lamp
First layer master data information；And the data symbol information for the second layer that LED lamp is transmitted, will be anti-with receiving device
The channel matrix of feedback adjusts the first LED lamp of the data symbol information that the second layer is transmitted in a manner of diversity transmission, and with multiple
With the second LED lamp of the data symbol information of the transmission means transmission second layer；
Specifically, the embodiment of the present invention can be sent into before LED lamp is transmitted in data, by the basic number of first layer it is believed that
The data symbol information of breath and the second layer carries out linear superposition, and to be transmitted determined by step S120 in a manner of diversity transmission
First LED lamp of the data symbol information of the second layer, and with the data symbol information of the multiplexing transmission mode transmission second layer
Second LED lamp；The superposition of data before the first LED lamp is adjusted as the master data information of first layer and the data symbols of the second layer
Identical symbolic information in number information, so as to by the master data information of first layer and the data symbol information of the second layer
The linear superposition result of identical symbolic information is sent into the first LED lamp so that each wick of the first LED lamp can transmit first
The identical master data information of layer, and transmit in a manner of diversity transmission the identical symbolic information of the second layer；
Meanwhile the superposition of data before the second LED lamp is adjusted as the master data information of first layer and the data of the second layer
Different symbolic information in symbolic information, so as to by the master data information of first layer and the data symbol information of the second layer
The linear superposition results of different symbolic information be sent into the second LED lamp so that each wick of the second LED lamp can transmit the
One layer of identical master data information, and with the different symbolic information of the multiplexing transmission mode transmission second layer.
As can be seen that in the embodiment of the present invention when the channel matrix of receiving device changes, receiving device can
Channel matrix feedback after change can be adjusted into double-layer overlapped to sending ending equipment, sending ending equipment according to the channel matrix after change
The diversity and multiplexing scheme of second layer signal in plus signal, to cause the diversity of the second layer of LED lamp in sending ending equipment to answer
With combination, channel matrix change that can be current with sending ending equipment is adapted, so as to overcome channel matrix change to interior
The influence of visible light communication.
Visible ray method of mobile communication provided in an embodiment of the present invention, applied to sending ending equipment, including：Data will be transmitted
Carry out serioparallel exchange and obtain dual-layer data, the dual-layer data includes：The master data information of first layer, and the data of the second layer
Symbolic information；It is determined that the channel matrix that the receiving device for receiving the transmission data is current；Determine in LED lamp with the letter
The correlation of road matrix meets at least one first LED lamp of first condition, and meets with the correlation of the channel matrix
At least one second LED lamp of second condition, wherein the first LED lamp and the correlation of the channel matrix are better than second
LED lamp and the correlation of the channel matrix；By the master data information of the first layer and the data symbols of the second layer
Identical symbolic information in number information carries out linear superposition, and is sent at least one first LED lamp so that it is described extremely
Few first LED lamp transmission identical master data information, and the identical symbol letter is transmitted in a manner of diversity transmission
Breath；And by the master data information of the first layer symbolic information different from the data symbol information of the second layer
Linear superposition is carried out, and is sent at least one second LED lamp, so that at least one second LED lamp transmission phase
Same master data information, and the different symbolic information is transmitted with multiplexing transmission mode.
As can be seen that the embodiment of the present invention double-deck can be superimposed coded system transmission signal, and can be set according to receiving terminal
Standby current channel matrix adjusts the diversity and multiplexing scheme of the second layer signal in double-deck superposed signal, to cause sending ending equipment
The diversity multiplexed combinations mode of the second layer of middle LED lamp, channel matrix that can be current with sending ending equipment are adapted, so that gram
Influence of the channel matrix change to indoor visible light communication is taken, it is logical to realize that visible ray mobile communication project moves to multi-User Indoor
Believe being applicable for scene.
Optionally, each wick in LED lamp transmits two layer signals in embodiments of the present invention, and the first layer signal is identical
Bit information (master data information), the second layer signal then need according to channel matrix adjust LED lamp in diversity transmission side
Formula transmits the LED lamp (the first LED lamp) of second layer signal, and transmits second layer signal with multiplexing transmission mode
LED lamp (the second LED lamp)；The code word signal of two layer signals can be as shown in Figure 4.
Optionally, due to the movement of user, it can cause its channel matrix that corresponding change, therefore the embodiment of the present invention occurs
Can be when the channel matrix of user changes, by the channel matrix after sending ending equipment feedback change, being sent to reach
End equipment adjusts the diversity of corresponding second layer signal and the purpose of multiplexing transmission mode, and Fig. 5 shows corresponding elimination channel
The schematic diagram of influence of the matrix to indoor visible light mobile communication, can refer to；Optionally, receiving device can pass through infrared communication
Or the local area network communication mode such as WLAN, by channel matrix feedback to sending ending equipment.
Optionally, after sending ending equipment receives channel matrix, sending ending equipment can be based on channel matrix and determine accordingly
Effective order, so as to the quantity of the first LED lamp for determining there is strong correlation in LED lamp with channel matrix with effective order,
And the quantity in determination LED lamp with less second LED lamp of correlation of channel matrix；
Accordingly, the embodiment of the present invention can set the current channel matrix of receiving device as H, and LED lamp has NtIndividual LED
Wick；Then the embodiment of the present invention can determine that effective order r of channel matrix H；And then determine NtN in individual LED lampt- r LED lamps
For the first LED lamp, r LED lamp is the second wick.
Further, the embodiment of the present invention can set channel matrix H as H=(h1, h2... hNt), wherein hiFor channel matrix H
Column vector, i ∈ (1~Nt), the corresponding LED lamp of a column vector；Then the embodiment of the present invention can determine that any two arrange to
Correlation (such as h of amountiWith hjThe correlation of two column vectors, j ∈ (1~Nt)), obtain the Correlation Moment of any two column vector
Battle array；So that it is determined that in the correlation matrix of any two column vector, the maximum r-1 of correlation matrix is to column vector, by described r-1 pairs
LED lamp corresponding to column vector is defined as the first LED lamp, by NtOther LED lamps are defined as second in individual LED lamp
LED lamp.
Optionally, Fig. 6 shows another flow chart of visible ray method of mobile communication provided in an embodiment of the present invention, the party
Method can be applied to sending ending equipment, reference picture 6, and this method can include：
Step S200, transmission data are subjected to serioparallel exchange and obtain dual-layer data, the dual-layer data includes：First layer
Master data information, and the data symbol information of the second layer；
Step S210, the current channel matrix of the receiving device for receiving the transmission data is determined；
Step S220, the correlation of any two column vector in channel matrix is determined, obtains the phase of any two column vector
Close matrix；
Step S230, in the correlation matrix of identified any two column vector, r-1 pairs of correlation matrix maximum is determined
Column vector, the r-1 is defined as the first LED lamp to LED lamp corresponding to column vector, by NtIt is other in individual LED lamp
LED lamp is defined as the second LED lamp；NtFor the LED lamp quantity of LED lamp, r is effective order of channel matrix；
Step S210~step S230 may be considered modulated process.
Step S240, it is the master data information of the first layer is identical with the data symbol information of the second layer
Symbolic information carry out linear superposition, and at least one first LED lamp is sent into, so that at least one first LED
Wick transmits identical master data information, and the identical symbolic information is transmitted in a manner of diversity transmission；And by described
One layer of the master data information symbolic information different from the data symbol information of the second layer carries out linear superposition, and
Be sent at least one second LED lamp so that at least one second LED lamp transmission identical basic number it is believed that
Breath, and the different symbolic information is transmitted with multiplexing transmission mode.
Optionally, the embodiment of the present invention can realize indoor visible light mobile communication with TDM (time division multiplexing) technology, tool
Body, the embodiment of the present invention can will transmit the cycle T of a user symbol information, and N is divided into according to the communication network users upper limit
Individual transmission time slot, the corresponding transmission time slot of a user, division and the method for salary distribution can be as shown in Figure 7；
So that when by LED lamp transmission signal, when the embodiment of the present invention can determine that receiving device transmits accordingly
Gap, T as shown in Figure 7i；And then make at least one first LED lamp on the corresponding transmission time slot of the receiving device,
Identical master data information is transmitted, and the identical symbolic information is transmitted in a manner of diversity transmission；And make described at least one
Individual second LED lamp transmits identical master data information on the corresponding transmission time slot of the receiving device, and with multiplexing
Transmission means transmits the different symbolic information.
Visible ray method of mobile communication provided in an embodiment of the present invention, coded system transmission signal, letter are superimposed using bilayer
Number through visible light channel reach receiving device, receiving device feeding back channel state information, sending ending equipment can utilize feedback
Information adjusts diversity and multiplexed transmission scheme, and carries out time slot division, Jin Ertong according to home communication network user access number
Each user is crossed according to slot transmission signal, reaches multi-User Indoor and purpose into network mobile communication is completed by visible light communication.
The embodiment of the present invention also provides a kind of sending ending equipment, sending ending equipment described below can with above with transmitting terminal
The visible ray method of mobile communication of equipment angle description is mutually to should refer to.
With reference to Fig. 1, Fig. 8 shows the structured flowchart of sending ending equipment provided in an embodiment of the present invention, reference picture 8, the hair
Sending end equipment can include：
LED lamp 10；
Serial-parallel conversion circuit 11, dual-layer data, the dual-layer data bag are obtained for transmission data to be carried out into serioparallel exchange
Include：The master data information of first layer, and the data symbol information of the second layer；
The modulation circuit 12 being connected with the serial-parallel conversion circuit, the receiving terminal for determining to receive the transmission data are set
Standby current channel matrix；Determine to meet at least one the of first condition in LED lamp with the correlation of the channel matrix
One LED lamp, and meet with the correlation of the channel matrix at least one second LED lamp of second condition, wherein first
LED lamp and the correlation of the channel matrix are better than the second LED lamp and the correlation of the channel matrix；
The linear superposition device 13 being connected with the modulation circuit and the LED lamp, for by the basic of the first layer
Data message carries out linear superposition with the identical symbolic information in the data symbol information of the second layer, and described in feeding extremely
Few first LED lamp；And by the master data information of the first layer and the data symbol information of the second layer
Different symbolic information carries out linear superposition, and is sent at least one second LED lamp；
Wherein, there is the first LED lamp and the second LED lamp, the first LED lamp can transmit identical in LED lamp 10
Master data information, and the identical symbolic information is transmitted in a manner of diversity transmission, the second LED lamp can transmit identical base
Notebook data information, and the different symbolic information is transmitted with multiplexing transmission mode.
Optionally, if the current channel matrix of receiving device is H, LED lamp has NtIndividual LED lamp；Then modulation electricity
Road can be used for the effective order r for determining channel matrix H；And then determine NtN in individual LED lampt- r LED lamps are the first LED
Core, r LED lamp are the second wick.
Further, if channel matrix H is H=(h1, h2... hNt), hiFor the column vector of channel matrix H, a column vector pair
Answer a LED lamp；Then modulation circuit be particularly used in determine any two column vector correlation, obtain any two arrange to
The correlation matrix of amount；In the correlation matrix of identified any two column vector, determine the maximum r-1 of correlation matrix to row to
Amount, is defined as the first LED lamp, by N by the r-1 to LED lamp corresponding to column vectortOther LEDs in individual LED lamp
Core is defined as the second LED lamp.
With reference to shown in Fig. 7, sending ending equipment can also include：
Time slot distribution circuit, for the cycle T of a user symbol information will to be transmitted, drawn according to the communication network users upper limit
It is divided into N number of transmission time slot, the corresponding transmission time slot of a user；First LED lamp is controlled in the receiving device
On corresponding transmission time slot, identical master data information is transmitted, and the identical symbol letter is transmitted in a manner of diversity transmission
Breath, and, control second LED lamp to transmit identical master data on the corresponding transmission time slot of the receiving device
Information, and the different symbolic information is transmitted with multiplexing transmission mode.
Below with the angle of receiving device, visible ray method of mobile communication provided in an embodiment of the present invention is situated between
Continue；Visible ray method of mobile communication described below can be based on the visible ray mobile communication described above with sending ending equipment angle
Method, both can mutually correspond to.
Fig. 9 is the schematic diagram of the visible ray mobile communication process of receiving device side, and Figure 10 provides for the embodiment of the present invention
Visible ray method of mobile communication another flow chart, this method can be applied to receiving device, with reference to shown in Fig. 9 and Figure 10,
This method can include：
Step S300, the optical signal that detection sending ending equipment is sent, and be converted to electric signal；
Optionally, the embodiment of the present invention can sense the optical signal that sending ending equipment is sent by light-inductive device, and change
For electric signal.
Step S310, the electric signal and noise are subjected to linear superposition；
Step S320, linear superposition result is carried out detecting decoding processing, obtains decoding result；
Step S330, parallel-serial conversion is carried out according to the decoding result, obtains transmitting data.
In embodiments of the present invention, after receiving device detects optical signal, electric signal process that can be based on conversion is adjudicated
Decoding restores original transmission data with parallel-serial conversion；It is emphasized that under conditions of total transmission power is certain, send
End equipment can be allocated to adjust each layer transmission priority according to communicating requirement to the power of double-deck signal；Receiving terminal is set
It is standby that the Fast Decoding Algorithims such as ball collection decoding can be used to complete the decoding to dual-layered information, whole double-deck overlapping system structure letter
It is single, it is easy to Project Realization.
Assuming that first layer transmitting data information is expressed as A ∈ {-a ,+a }, second layer transmission symbolic information be expressed as B ∈-
β ,+β }, then receive symbolic information Y and be expressed as：Y=H (A+B)+n；
Wherein, n is average 0, variance σ2Additive white Gaussian noise；When receiving terminal uses maximum likelihood decision, obtain
Two layers of signal code judgement it is as follows：
With reference to shown in Fig. 9, Figure 11 shows the structured flowchart of receiving device provided in an embodiment of the present invention, reference picture
11, the receiving device can include：
Optical signal detector 20, the optical signal sent for detecting sending ending equipment, and be converted to electric signal；
The superimposer 21 being connected with the optical signal detector, for the electric signal and noise to be carried out into linear superposition；
The decoding circuit 22 being connected with the superimposer, for carrying out linear superposition result to detect decoding processing, obtain
Decode result；
The parallel-to-serial converter 23 being connected with the decoding circuit, for carrying out and going here and there to turn according to the decoding result
Change, obtain transmitting data.
Optionally, also settable signal amplifier between optical signal detector 20 and superimposer 21.
The embodiment of the present invention also provides a kind of visible ray GSM, and the visible ray GSM can include
Sending ending equipment described above and receiving device described above；Figure 12 shows that the progress of visible ray GSM can
See the process schematic of light mobile communication, can refer to.
The embodiment of the present invention is reached receiving terminal through visible light channel and set using double-deck superposition coded system transmission signal, signal
Standby, receiving device feeding back channel state information, sending ending equipment can utilize feedback information adjustment diversity and multiplexed transmission scheme,
And time slot division is carried out according to home communication network user access number, and then reached by each user according to slot transmission signal
Multi-User Indoor completes the purpose into network mobile communication by visible light communication.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.For device disclosed in embodiment
For, because it is corresponded to the method disclosed in Example, so description is fairly simple, related part is said referring to method part
It is bright.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (10)
1. a kind of visible ray method of mobile communication, it is characterised in that applied to sending ending equipment, methods described includes：
Transmission data are subjected to serioparallel exchange and obtain dual-layer data, the dual-layer data includes：The master data information of first layer,
And the data symbol information of the second layer；
It is determined that the channel matrix that the receiving device for receiving the transmission data is current；
Determine at least one first LED lamp for meeting first condition in LED lamp with the correlation of the channel matrix, and with
The correlation of the channel matrix meets at least one second LED lamp of second condition, wherein the first LED lamp and the letter
The correlation of road matrix is better than the second LED lamp and the correlation of the channel matrix；
The master data information of the first layer and the identical symbolic information in the data symbol information of the second layer are entered
Row linear superposition, and at least one first LED lamp is sent into, so that at least one first LED lamp transmission is identical
Master data information, and the identical symbolic information is transmitted in a manner of diversity transmission；
And by the master data information of the first layer symbolic information different from the data symbol information of the second layer
Linear superposition is carried out, and is sent at least one second LED lamp, so that at least one second LED lamp transmission phase
Same master data information, and the different symbolic information is transmitted with multiplexing transmission mode.
2. visible ray method of mobile communication according to claim 1, it is characterised in that set the current channel of receiving device
Matrix is H, and LED lamp has NtIndividual LED lamp；Meet in the determination LED lamp with the correlation of the channel matrix
At least one first LED lamp of one condition, and meet at least one the of second condition with the correlation of the channel matrix
Two LED lamps include：
Determine effective order r of channel matrix H；
Determine NtN in individual LED lampt- r LED lamps are the first LED lamp, and r LED lamp is the second wick.
3. visible ray method of mobile communication according to claim 2, it is characterised in that set channel matrix H ashiFor the column vector of channel matrix H, the corresponding LED lamp of a column vector；The then determination NtIt is individual
N in LED lampt- r LED lamps are the first LED lamp, and r LED lamp is that the second wick includes：
The correlation of any two column vector is determined, obtains the correlation matrix of any two column vector；
In the correlation matrix of identified any two column vector, the maximum r-1 of correlation matrix is determined to column vector, by described in
R-1 is defined as the first LED lamp to LED lamp corresponding to column vector, by NtOther LED lamps are defined as in individual LED lamp
Second LED lamp.
4. according to the visible ray method of mobile communication described in claim any one of 1-3, it is characterised in that methods described is also wrapped
Include：
The cycle T of a user symbol information will be transmitted, N number of transmission time slot is divided into according to the communication network users upper limit, one
The corresponding transmission time slot of user；
Make at least one first LED lamp on the corresponding transmission time slot of the receiving device, transmission identical is basic
Data message, and the identical symbolic information is transmitted in a manner of diversity transmission；And
Make at least one second LED lamp on the corresponding transmission time slot of the receiving device, transmission identical is basic
Data message, and the different symbolic information is transmitted with multiplexing transmission mode.
A kind of 5. sending ending equipment, it is characterised in that including：
LED lamp；
Serial-parallel conversion circuit, dual-layer data is obtained for transmission data to be carried out into serioparallel exchange, the dual-layer data includes：First
The master data information of layer, and the data symbol information of the second layer；
The modulation circuit being connected with the serial-parallel conversion circuit, for determining that the receiving device for receiving the transmission data is current
Channel matrix；Determine at least one first LED for meeting first condition in LED lamp with the correlation of the channel matrix
Core, and meet with the correlation of the channel matrix at least one second LED lamp of second condition, wherein the first LED lamp
It is better than the second LED lamp and the correlation of the channel matrix with the correlation of the channel matrix；
The linear superposition device being connected with the modulation circuit and the LED lamp, for by the basic number of the first layer it is believed that
Breath carries out linear superposition with the identical symbolic information in the data symbol information of the second layer, and is sent into described at least one
First LED lamp；It is and the master data information of the first layer is different from the data symbol information of the second layer
Symbolic information carries out linear superposition, and is sent at least one second LED lamp；
The first LED lamp in the LED lamp, for transmitting identical master data information, and passed in a manner of diversity transmission
The defeated identical symbolic information；
The second LED lamp in the LED lamp, for transmitting identical master data information, and passed with multiplexing transmission mode
The defeated different symbolic information.
6. sending ending equipment according to claim 5, it is characterised in that setting LED lamp has NtIndividual LED lamp, receiving terminal
The current channel matrix of equipment is H,hiFor the column vector of channel matrix H, a column vector corresponding one
Individual LED lamp
The modulation circuit is specifically used for, and determines the correlation of any two column vector, obtains the correlation of any two column vector
Matrix；In the correlation matrix of identified any two column vector, the maximum r-1 of correlation matrix is determined to column vector, by institute
State r-1 and the first LED lamp is defined as to LED lamp corresponding to column vector, by NtOther LED lamps determine in individual LED lamp
For the second LED lamp.
7. the sending ending equipment according to claim 5 or 6, it is characterised in that also include：
Time slot distribution circuit, for the cycle T of a user symbol information will to be transmitted, it is divided into according to the communication network users upper limit
N number of transmission time slot, the corresponding transmission time slot of a user；Control first LED lamp corresponding in the receiving device
Transmission time slot on, transmit identical master data information, and the identical symbolic information transmitted in a manner of diversity transmission,
And control second LED lamp is on the corresponding transmission time slot of the receiving device, transmission identical basic number it is believed that
Breath, and the different symbolic information is transmitted with multiplexing transmission mode.
8. a kind of visible ray method of mobile communication, it is characterised in that based on the visible ray movement described in claim any one of 1-4
Communication means, methods described are applied to receiving device, and methods described includes：
The optical signal that detection sending ending equipment is sent, and be converted to electric signal；
The electric signal and noise are subjected to linear superposition；
Linear superposition result is carried out to detect decoding processing, obtains decoding result；
Parallel-serial conversion is carried out according to the decoding result, obtains transmitting data.
A kind of 9. receiving device, it is characterised in that based on the sending ending equipment described in claim 5-7 any one, including：
Optical signal detector, the optical signal sent for detecting sending ending equipment, and be converted to electric signal；
The superimposer being connected with the optical signal detector, for the electric signal and noise to be carried out into linear superposition；
The decoding circuit being connected with the superimposer, for carrying out linear superposition result to detect decoding processing, obtain at decoding
Manage result；
The parallel-to-serial converter being connected with the decoding circuit, for carrying out parallel-serial conversion according to the decoding result, obtain
To transmission data.
10. a kind of visible ray GSM, it is characterised in that set including the transmitting terminal described in claim any one of 5-7
It is standby, and the receiving device described in claim 9.
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| CN103346835A (en) * | 2013-07-10 | 2013-10-09 | 唐笛恺 | High-speed visible light multiple-input multiple-output system and communication method thereof |
| CN103731208A (en) * | 2008-10-17 | 2014-04-16 | 三星电子株式会社 | Transmission device and reception device for visible light communication |
| CN104104418A (en) * | 2014-08-07 | 2014-10-15 | 哈尔滨工业大学 | High transmission rate and bandwidth utilization rate of MIMO Multi-h CPM wireless communication method |
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| EP3457613A1 (en) * | 2010-10-01 | 2019-03-20 | Interdigital Patent Holdings, Inc. | Method and apparatus for transmitting pilot on multiple antennas |
| CN102790645B (en) * | 2012-06-29 | 2015-03-11 | 深圳光启创新技术有限公司 | Multi-path visible light communication based scrambling and descrambling system and method |
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| CN103731208A (en) * | 2008-10-17 | 2014-04-16 | 三星电子株式会社 | Transmission device and reception device for visible light communication |
| CN102970100A (en) * | 2012-11-13 | 2013-03-13 | 南京邮电大学 | Multichannel wavelength division multiplexing visible light communication system based on red green blue (RGB) light-emitting diode (LED) |
| CN103346835A (en) * | 2013-07-10 | 2013-10-09 | 唐笛恺 | High-speed visible light multiple-input multiple-output system and communication method thereof |
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