CN105515678B - A kind of visible ray frequency hopping communications R-T unit - Google Patents
A kind of visible ray frequency hopping communications R-T unit Download PDFInfo
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- CN105515678B CN105515678B CN201510967857.5A CN201510967857A CN105515678B CN 105515678 B CN105515678 B CN 105515678B CN 201510967857 A CN201510967857 A CN 201510967857A CN 105515678 B CN105515678 B CN 105515678B
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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
- H04B10/40—Transceivers
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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 invention discloses a kind of visible ray frequency hopping communications R-T unit.The device includes transmitting terminal and receiving terminal.Transmitting terminal has mission controller, encoder, driver, n light transmitting antenna.Each light transmitting antenna has transmitting filter, LED；Receiving terminal, which has, receives controller, decoder, decision device, n light receiver aerial；Each light receiver aerial, which has, receives filter, photelectric receiver.N is the natural number more than or equal to 3.Transmitting filter and reception filter use band logical filter.N light transmitting antenna is corresponding with n light receiver aerial to form n communication line.Each communication line is extended to a 2bit number by method, obtains 2-2nBar encoding and decoding rule, and effective encoding and decoding rule is filtered out, effective encoding and decoding table is built, establishes communication line and encoding and decoding rule corresponding relation, the frequent saltus step in different codings and communication line of effective signal is realized, to reach higher level of security.
Description
Technical field
The invention belongs to technical field of photo communication, more particularly to a kind of visible ray frequency hopping communications R-T unit.
Background technology
Visible light communication technology (Visible Light Commuication, VLC) is carried by the use of visible ray as information
Body, the communication mode of optical signal is directly transmitted in atmosphere.VLC is in fluorescent lamp, light emitting diode (Light by modulates information
Emitting Diode, LED) etc. on lighting apparatus, make its with the High Speed Modulation light wave signal sent come carry out modulates information and
Transmission, optical carrier then is received using devices such as photodiodes to obtain information.
Frequency hopping (Frequency-Hopping Spread Spectrum；FHSS) it is upper both at home and abroad at present compare
A kind of ripe technology.It is mainly used in military communication, it can effectively avoid interference, and play communication efficiency.Frequency hopping
Synchronous and with the case of, receive both ends and signal is transmitted with the narrow frequency carrier wave of specific pattern, it is unspecific for one
Recipient, runout signal caused by FHSS are only impulsive noise for it.Compared with frequency fixing communication, frequency hopping communications is more
It is hidden to be also difficult to be trapped.As long as other side does not know the rule of carrier frequency saltus step, communication interception content is difficult to.Meanwhile frequency hopping is led to
Letter also has good antijamming capability, even if there is part frequency to be disturbed, is carried out on the frequency that remains to not be disturbed at other
Normal communication.Because frequency-hopping communication system is instantaneous narrowband systems, it is easy to compatible with other narrow-band communication systems, also
It is to say, frequency hopping radio set can be advantageous to the renewal of equipment with the arrowband radio station intercommunication of routine.
Frequency hopping is originally intended in radio communication, and its thought is used in visible light communication technology by the present invention, it is proposed that one
Kind visible ray frequency hopping communications decoding method.In VLC technologies, introduce it is a kind of safety and hidden communication means.
The content of the invention
It is an object of the invention to provide a kind of visible ray frequency hopping communications R-T unit.
What the present invention was realized in：A kind of visible ray frequency hopping communications R-T unit, the device include transmitting terminal and reception
End；Transmitting terminal includes mission controller, encoder, driver and light transmission antenna group, and light transmission antenna group contains n light transmitting
Antenna, each light transmitting antenna include transmitting filter and LED；Receiving terminal include receive controller, decoder, decision device and
Light receiver aerial group, light receiver aerial group have n light receiver aerial, and each light receiver aerial, which includes, receives filter and photoelectricity
Receiver；Wherein, n is the natural number more than or equal to 3.
Mission controller electrically connects with encoder；Driver electrically connects with light transmission antenna group, encoder respectively.
Controller is received to electrically connect with decoder；Decision device electrically connects with light receiver aerial group, decoder respectively.
Transmitting filter and reception filter all use band logical filter.Band logical filter can only by the light in some wave-length coverage,
For filtering out the light beyond this wave-length coverage.The optical signal passband of light transmitting antenna and light receiver aerial, depending on being made
The free transmission range of band logical filter, i.e., depending on optical wavelength range that band logical filter can pass through.
Light transmission antenna group meets condition：The optical signal passband of 1st light transmitting antenna includes visible-range, the n-th-j
Individual, n-th of smooth transmitting antenna optical signal passband is all the subset of the 1st, and the n-th-j, n-th of each smooth transmitting antenna
Optical signal passband does not occur simultaneously.J is the natural number less than n and more than 0, and n-j is not equal to 1.
Mission controller, for obtaining data from external equipment, and by the data of acquisition according to 4 one group of binary systems half
Individual byte divides for unit, and exports the data of nybble to encoder every time.
Encoder, 4 bits that one is inputted by mission controller, and it is encoded into 4 binary systems of one group of n
Number, then this n 4 bits are exported to driver.
Driver, for " 1 " and " 0 " signal of n 4 bits exported according to encoder, driving n roads order wire
Light transmitting antenna on road, " 1 " and " 0 " are represented respectively with the two states that LED luminance is different.
Driver, by one group of n 4 bits of encoder output, it is respectively used to n light transmitting antenna；With every
It is when individual 4 bits by encoder input drive light transmitting antenna, this 4 bit is suitable according to from left to right
Sequence, each clock cycle export one, are used to drive LED successively.
Light transmitting antenna, under driver control, being changed with the different two states of LED luminance, producing optical signal,
And after transmitting filter filtering, sent with the optical signal of some wave-length coverage.
Light receiver aerial, for receiving the optical signal sent from transmitting terminal.
Light receiver aerial group meets condition：The optical signal passband of each light receiver aerial is different.1st light receiver aerial
Optical signal passband include visible-range, the n-th-j, the optical signal passband of n-th of light receiver aerial be all the son of the 1st
Collection, and the n-th-j is individual, the optical signal passband of n-th of each light receiver aerial does not occur simultaneously.Meanwhile the light of the 1st light receiver aerial
Signal passband, it is the subset of the 1st transmitting filter optical signal passband again, the optical signal passband of the n-th-j light receiver aerials, is again
The subset of n-th-j transmitting filter signal passbands, the optical signal passband of n-th of light receiver aerial, is n-th of transmitting filter light again
The subset of signal passband.
Photelectric receiver, for receiving the optical signal after received filter filters, and it is converted into analog electrical signal output.
Decision device, for receiving the analog electrical signal of photelectric receiver output, and data signal output is converted to, for every
Individual photelectric receiver, the data signal of a judgement in each clock cycle, can be exported.
Decoder, the data signal for decision device to be exported are reduced into 4 digits of one group of n, and by 4 of the n
Number decoder exports into 4 bits.
Controller is received, for the output of decoder to be reduced into former data, and the former data for receiving and restoring are defeated
Go out to external equipment.
N light transmitting antenna of light transmission antenna group, the n light receiver aerial with light receiver aerial group, according to optical signal
Passband correspond, form n communication line.
The decoding method of encoder and decoder is：
Each communication line is just obtained into n 2 bits with 2 binary representations, n circuit：a2m
a2m-1, amFor 1 bit 1 or 0, i.e.,：am={ 0,1 }, m are more than or equal to 1 and are less than or equal to n.Therefore, the 1st antenna
Corresponding a2a1, the 2nd antenna correspond to a4a3, m-th of antenna correspond to a2m a2m-1.For 2 bits：a2m a2m-1, just have
00th, 01,10,11 4 kind of situation, then to amEncoded, work as amWhen=0, binary number 01 is encoded into；Work as amWhen=1, coding
Into binary number 10.That is, a2m a2m-1Four kinds of situations just correspond to obtain 44 Binary Zeros 101,0110,1001,1010.
N a corresponding to n communication line2m a2m-1, the binary combination A=a of one group of 2n position can be obtained2n a2n-1…
am…a2a1, due to each a2m a2m-1Have 00,01,10,11 4 kind of combination, therefore just have 22nBar encoding and decoding rule.
Each encoding and decoding rule has one group of S1, S2, Sm, Sn-1, Sn, and R1, R2, Rm, Rn-1, Rn.Wherein, S1 is
The transmission code of 1st circuit, S2 are the transmission code of the 2nd circuit, and Sm is the reception code of m-th of circuit, and Sn-1 is (n-1)th line
The transmission code on road, Sn are the transmission code of n-th of circuit；R1 is the reception code of the 1st circuit, and R2 is the reception code of the 2nd circuit,
Rm is the reception code ... of m-th of circuit, and Rn-1 is the reception code of (n-1)th circuit, and Rn is the reception code of n-th of circuit.
Each Sm is a2m a2m-1One of four kinds of combinations of 4 obtained 4 Binary Zeros 101,0110,1001,1010.
R1 be same encoding and decoding rule in S1, S2, Sm, Sn-1, Sn the n systems of each add and.For remaining R2, Rm,
Rn-1, Rn, there is Rm=S1+Sm.
22nIn bar encoding and decoding rule, effective encoding and decoding rule is found out, builds effective encoding and decoding table, method is：
1st step：22nIn bar encoding and decoding rule, the R1 of AAAA types is filtered out first.AAAA types represent R1 4 digits all phases
Deng if without the R1 of AAAA types, into the 2nd step, otherwise into the 3rd step.
2nd step：22nIn bar encoding and decoding rule, the R1 of ABAB types is filtered out.In ABAB types expression R1 4 digits, the 1st, 3
Position is the same, and the 2nd, 4 is the same, meanwhile, the 1st and the 2nd bit value difference 1, i.e., | A-B | absolute value be 1, and into the 3rd step.
3rd step：In each bar encoding and decoding rule filtered out by the first step or second step, R2, Rm, Rn-1, Rn are screened
Most those encoding and decoding rule of middle AAAA types, due to Rm=S1+Sm, that is, filters out each 4 binary systems in R2, Rm, Rn-1, Rn
Number, 1111 k most entries, k are the natural number more than or equal to 16.
4th step：Each article of encoding and decoding rule that will be screened by the 3rd step, collects side by side into effective encoding and decoding table.Form
What is comprised at least shows：S1, S2, Sm, Sn-1, Sn, and R1, R2, Rm, Rn-1, Rn.
In transmitting terminal, the coding of encoder uses the S1 row of effective encoding and decoding table, S2 row, Sm row, Sn-1 row, Sn row；
Receiving terminal, the decoding of decoder use the R1 row of effective encoding and decoding table, R2 row, Rm row, Rn-1 row, Rn row.
Output data for mission controller with effective encoding and decoding table, it is necessary to establish corresponding relation.By to n be 3,4,
5th, 6 derivation is understood, by building effective coding schedule, available encoding and decoding entry number, necessarily more than or equal to 16.Cause
This, can combine entry number, and corresponding relation is established between input data and effective each entry of encoding and decoding table.Corresponding relation can be with
It is two kinds of static state and dynamic.Static state is corresponding：In k entry of efficient coding table, fixed selection 16 entries therein with
16 4 binary systems of data are corresponding.Dynamic is corresponding：In k entry of effective encoding and decoding table, the selection of change is wherein
16 entries it is corresponding to 16 4 binary systems of data.The corresponding relation of encoding and decoding entry and data is in communication process
In do not fix, can according to setting rule change.
The cataloged procedure of device is as follows：
In transmitting terminal, encoder is found for 4 binary systems of output data of mission controller in effective encoding and decoding table
Corresponding encoding and decoding entry, by 4 bits of the input be encoded into form respective entries row S1 row, S2 row, S3 row,
Sm row, Sn-1 are arranged, n 4 bits of the row of Sn row, each row that S1 is arranged, S2 row, S3 are arranged, Sm row, Sn-1 row, Sn are arranged
Numerical value is used separately as the signal output of driver driving n roads communication line.The numerical value of S1 row is used to drive the 1st road communication line
The 1st light transmitting antenna LED；The numerical value of S2 row is used to drive the 2nd light transmitting antenna on the 2nd road communication line
LED；The numerical value of S3 row is used for the LED for driving the 3rd light transmitting antenna on the 3rd road communication line；The like.
The decoding process of device is as follows：
In n 4 bits that receiving terminal, decoder export for decision device, phase is found in effective encoding and decoding table
The numerical value for the n row that R1 row, R2 row, Rm row, Rn-1 row, the Rn of corresponding encoding and decoding entry are arranged, and thereby determine that corresponding volume
Decode entry.Corresponding relation in transmitting terminal input data and effective encoding and decoding table further according to agreement between each entry.Decoding
Go out the reception data output of receiving terminal.
The numerical value for the n row that R1 row, R2 row, Rm row, Rn-1 row, Rn are arranged connects for n light on the n roads communication line of receiving terminal
Receive antenna and receive the optical signal that transmitting terminal is sent and the output after decision device is handled.Wherein, R1 is classified as the 1st road order wire
The decision device output on road, R2 are classified as the decision device output of the 2nd road communication line, and the decision device that R3 is classified as the 3rd road communication line is defeated
Go out, R4 is classified as the decision device output of the 4th road communication line, by that analogy.
Wherein, R1 is classified as the 1st tunnel, the 2nd tunnel, m roads, the (n-1)th tunnel, the transmitting terminal of n roads communication line on the n-th tunnel are sent
Decision device output after the superposition of optical signal.The light letter that the transmitting terminal that R2 is classified as the 2 road communication lines on the 1st road and the 2nd tunnel is sent
Number superposition after decision device output.The optical signal that the transmitting terminal that Rm is classified as the 2 road communication lines on the 1st road and m roads is sent
Decision device output after superposition.The superposition for the optical signal that the transmitting terminal that Rn is classified as the 2 road communication lines on the 1st road and the n-th tunnel is sent
Decision device output afterwards.
The monopolizing characteristic that apparatus of the present invention can be superimposed, be decomposed using the different wave length of visible ray, frequency hopping is transplanted
Into visible light communication, realize encoded signal and loaded on the visible ray of multiple different wave lengths and saltus step, allow communication have compared with
Strong disguise, anti-interference, the security of visible light communication is improved to a certain extent.
Brief description of the drawings
Fig. 1 is the apparatus structure block diagram of the embodiment of the present invention.
Marked in figure：1- mission controllers；2- encoders；3- drivers；4- light transmission antenna groups；5- light receiver aerials
Group；6- decision devices；7- decoders；8- receives controller.
Embodiment
Embodiment 1：
A kind of visible ray frequency hopping communications R-T unit, the device include transmitting terminal and receiving terminal.Transmitting terminal includes：Transmitting control
Device 1 processed, encoder 2, driver 3, light transmission antenna group 4.Light transmission antenna group 4 has 3 light transmitting antennas, the transmitting of each light
Antenna has：Launch filter, LED；Receiving terminal includes：Receive controller 8, decoder 7, decision device 6, light receiver aerial group 5；Light
Reception antenna group 5 has 3 light receiver aerials, and each light receiver aerial has：Receive filter, photelectric receiver.
Mission controller 1 electrically connects with encoder 2；Driver 3 electrically connects with light transmission antenna group 4, encoder 2 respectively.
Controller 8 is received to electrically connect with decoder 7；Decision device 6 electrically connects with light receiver aerial group 5, decoder 7 respectively.
Transmitting filter and reception filter all use band logical filter.Band logical filter can only by the light in some wave-length coverage,
For filtering out the light beyond this wave-length coverage.The optical signal passband of light transmitting antenna and light receiver aerial, depending on being made
The free transmission range of band logical filter, i.e., depending on optical wavelength range that band logical filter can pass through.
Light transmission antenna group 4 meets condition：The optical signal passband of 1st light transmitting antenna includes visible-range, and the 2nd
Individual, the 3rd light transmitting antenna optical signal passband is all the subset of the 1st, and the 2nd, the light of each smooth transmitting antenna of the 3rd
Signal passband is not occured simultaneously.Mission controller 1, for obtaining data from external equipment, and the data of acquisition are entered according to 4 two
Make one group of nybble to divide for unit, and export the data of nybble to encoder 2 every time.
Encoder 2,4 bits that one is inputted by mission controller 1, and be encoded into one group 34 two enter
Number processed, then this 34 bits are exported to driver 3.
Driver 3, for " 1 " and " 0 " signal of 34 bits exported according to encoder 2, the communication of 3 tunnels of driving
Light transmitting antenna on circuit, " 1 " and " 0 " are represented respectively with LED bright, both states of going out.
Driver 3, one group of 34 bit that encoder 2 is exported, it is respectively used to drive 3 road light transmitting antennas；
When driving light transmitting antenna with each 4 bits inputted by encoder 2, by this 4 bit according to certainly left
To the order on the right side, each clock cycle exports one, is used to drive LED successively.
Light transmitting antenna, under the control of driver 3, with LED it is bright, go out two states, produce optical signal, and pass through
After launching filter filtering, sent with the optical signal of some wave-length coverage.
Light receiver aerial, for receiving the optical signal sent from transmitting terminal.
Light receiver aerial group 5 meets condition：The optical signal passband of each light receiver aerial is different.1st light-receiving day
The optical signal passband of line includes visible-range, and the optical signal passband of the 2nd, the 3rd light receiver aerial is all the son of the 1st
Collection, and the 2nd, the optical signal passband of each light receiver aerial of the 3rd do not occur simultaneously.The optical signal of 1st light receiver aerial leads to
Band, it is the subset of the 1st transmitting filter optical signal passband again, the optical signal passband of the 2nd light receiver aerial, is the 2nd hair again
The subset of filter signal passband is penetrated, the optical signal passband of the 3rd light receiver aerial, is the 3rd transmitting filter optical signal passband again
Subset.
Photelectric receiver, for receiving the optical signal after received filter filters, and it is converted into analog electrical signal output.
Decision device 6, for receiving the analog electrical signal of photelectric receiver output, and data signal output is converted to, for
Each photelectric receiver, the data signal of a judgement in each reception clock cycle, can be exported.
Decoder 7, the data signal for decision device 6 to be exported are reduced into 4 digits of one group 3, and by this 34
Digit is decoded into 4 bits, and exports.
Controller 8 is received, for the output of decoder 7 to be reduced into former data, and the former data that will be received and restore
It is output to external equipment.
3 light transmitting antennas of light transmission antenna group 4,3 light receiver aerials with light receiver aerial group 5, believe according to light
Number passband correspond, form 3 communication lines.
The decoding method of encoder 2 and decoder 7 is：
Each communication line is just obtained into 32 bits with 2 binary representations, 3 circuits：a6a5、
a4a3、a2a1, therefore, the 1st antenna corresponds to a2a1, the 2nd antenna correspond to a4a3, the 3rd antenna correspond to a6a5.For 32
Binary number：a6a5、a4a3、a2a1, have 00,01,10,11 4 kind of situation, then to a6、a5、a4、a3、a2、a1Encoded,
Work as aiWhen=0, binary number 01 is encoded into；Work as aiWhen=1, binary number 10 is encoded into.That is, ai ai-1Four kinds of situations it is just right
44 Binary Zeros 101,0110,1001,1010, i={ 1,2,3,4,5,6 } should be obtained.
3 a corresponding to 3 communication linesi ai-1, the binary combination A=a of one group 3 can be obtained6、a5、a4、a3、
a2、a1, due to each ai ai-1Have 00,01,10,11 4 kind of combination, therefore just have 26=64 encoding and decoding rules.
Each encoding and decoding rule has one group of S1, S2, S3, and R1, R2, R3.Wherein, S1 is the transmission of the 1st circuit
Code, S2 are the transmission code of the 2nd circuit, and S3 is the transmission code of the 3rd circuit；R1 is the reception code of the 1st circuit, and R2 is the 2nd
The reception code of individual circuit, R3 are the reception code of the 3rd circuit.
Each Si is a2i a2i-1One of four kinds of combinations of 4 obtained 4 Binary Zeros 101,0110,1001,1010.
R1 be same encoding and decoding rule in S1, S2, S3 3 systems of each add and.For remaining 26In bar encoding and decoding rule,
Effective encoding and decoding rule is found out, builds effective encoding and decoding table, method is：
1st step：26In bar encoding and decoding rule, the R1 of AAAA types is filtered out first.AAAA types represent R1 4 digits all phases
Deng if without the R1 of AAAA types, into the 2nd step, otherwise into the 3rd step.
2nd step：26In bar encoding and decoding rule, the R1 of ABAB types is filtered out.In ABAB types expression R1 4 digits, the 1st, 3
Position is the same, and the 2nd, 4 is the same, meanwhile, the 1st and the 2nd bit value difference 1, i.e., | A-B | absolute value be 1, and into the 3rd step.
3rd step：In each bar encoding and decoding rule filtered out by the first step or second step, AAAA types in screening R2, R3
Most those encoding and decoding rules, due to R2=S1+S2, R3=S1+S3, that is, filters out each 4 bit in R2 or R3
There is 1111 entry.
4th step：Each article of encoding and decoding rule that will be screened by the 3rd step, collects side by side into effective encoding and decoding table.Form
What is comprised at least shows：S1, S2, S3, and R1, R2, R3.
The encoding and decoding rule of encoder 2 and decoder 7, with reference to table 1.The row number that first behavior of form respectively arranges；First row
For the line number of each row.
1 effective encoding and decoding of table rule
In this example, it is corresponding using static state：4 bit binary datas that mission controller 1 is exported are corresponded to effective
16 entries in coding schedule.Bin in table 1, which is classified as, to be input to 16 4 two of encoder 2 after mission controller 1 is changed and enters
System, Hex are classified as 16 corresponding system numbers of Bin row.Each 4 bit that encoder 2 arranges Bin is encoded into phase in table 1
S1 row, S2 row, three 4 binary systems of S3 row that should be gone, the numerical value that S1 row, S2 row, S3 row three arrange are used separately as driver 3 and driven
The signal output of dynamic 3 road communication lines.The numerical value of S1 row is used to drive the 1st light transmitting antenna on the 1st road communication line
LED；The numerical value of S2 row is used for the LED for driving the 2nd light transmitting antenna on the 2nd road communication line；The numerical value of S3 row is used to drive
The LED of the 3rd light transmitting antenna on dynamic 3rd road communication line.
R1 row, R2 row, the row of R3 row three are respectively 3 light-receivings on 3 road communication lines of the frequency divider selection of receiving terminal
Antenna receives the optical signal that transmitting terminal is sent and the output after the processing of decision device 6, R1 are classified as sentencing for the 1st road communication line
Certainly device 6 exports, and the decision device 6 that R2 is classified as the 2nd road communication line exports, and the decision device 6 that R3 is classified as the 3rd road communication line exports.
Wherein, R1 be classified as the 1st tunnel, the 2nd tunnel, the 3rd tunnel 3 road communication lines the superposition of optical signal that sends of transmitting terminal after
Decision device 6 export.Sentencing after the superposition for the optical signal that the transmitting terminal that R2 is classified as the 2 road communication lines on the 1st road and the 2nd tunnel is sent
Certainly device 6 exports.Decision device after the superposition for the optical signal that the transmitting terminal that R3 is classified as the 2 road communication lines on the 1st road and the 3rd tunnel is sent
6 outputs.
Embodiment 2：
A kind of visible ray frequency hopping communications R-T unit, the device include transmitting terminal and receiving terminal.Transmitting terminal includes：Transmitting control
Device 1 processed, encoder 2, driver 3, light transmission antenna group 4.Light transmission antenna group 4 has 6 light transmitting antennas, light receiver aerial group
5 have 6 light receiver aerials.6 light transmitting antennas, 6 light receiver aerials, corresponded according to the passband of optical signal, form 6
Communication line.
Light transmission antenna group 4 meets condition：The optical signal passband of 1st light transmitting antenna includes visible-range, and the 2nd
Individual, the 3rd, the 4th, the 5th, the 6th light transmitting antenna optical signal passband is all the subset of the 1st, and the 2nd, the 3rd
It is individual, the 4th, the 5th, the optical signal passband of each smooth transmitting antenna of the 6th do not occur simultaneously.
Mission controller 1, for obtaining data from external equipment, and by the data of acquisition according to 4 one group of binary systems
Nybble divides for unit, and exports the data of nybble to encoder 2 every time.
Encoder 2,4 bits that one is inputted by mission controller 1, and be encoded into one group 64 two enter
Number processed, then this 64 bits are exported to driver 3.
Driver 3, for ' 1 ' and ' 0 ' signal of 64 bits exported according to encoder 2, the communication of 6 tunnels of driving
Light transmitting antenna on circuit, " 1 " and " 0 " are represented respectively with the two states that LED luminance is different.
Driver 3, one group of 64 bit that encoder 2 is exported, driving is respectively used to by the 6 of frequency-selector selection
Road light transmitting antenna；When driving light transmitting antenna with each 4 bits inputted by encoder 2, this 4 two are entered
Number processed exports one according to order from left to right, each clock cycle, is used to drive LED successively.
Light receiver aerial group 5 meets condition：The optical signal passband of each light receiver aerial is different.1st light-receiving day
The optical signal passband of line includes visible-range, the optical signal of the 2nd, the 3rd, the 4th, the 5th, the 6th light receiver aerial
Passband is all the subset of the 1st, and the 2nd, the 3rd, the 4th, the 5th, the optical signal passband of each light receiver aerial of the 6th
Do not occur simultaneously.Meanwhile the optical signal passband of the 1st light receiver aerial, it is the 1st subset for launching filter optical signal passband again,
The optical signal passband of 2nd light receiver aerial, it is the subset of the 2nd transmitting filter signal passband again, the 3rd light receiver aerial
Optical signal passband, it is the subset of the 3rd transmitting filter optical signal passband again, the like.
Decoder 7, the data signal for decision device 6 to be exported are reduced into 4 digits of one group 6, and by this 64
Digit is decoded into 4 bits, and exports.
6 light transmitting antennas of light transmission antenna group 4,6 light receiver aerials with light receiver aerial group 5, believe according to light
Number passband correspond, form 6 communication lines.
The decoding method of encoder 2 and decoder 7 is：
Each communication line is just obtained into 62 bits with 2 binary representations, 6 circuits：a12a11、
a10a9、a8a7、a6a5、a4a3、a2a1, therefore, the 1st antenna corresponds to a2a1, the 2nd antenna correspond to a4a3, the 3rd antenna is correspondingly
a6a5.For 62 bits：a12a11、a10a9、a8a7、a6a5、a4a3、a2a1, have 00,01,10,11 4 kind of situation, so
Afterwards to a12、a11、a10、a9、a8、a7、a6、a5、a4、a3、a2、a1Encoded, work as aiWhen=0, binary number 01 is encoded into；Work as ai
When=1, binary number 10 is encoded into.That is, ai ai-1Four kinds of situations just correspond to obtain 44 Binary Zeros 101,0110,
1001、1010.I={ 1,2,3,4,5,6,7,8,9,10,11,12 }.
6 a corresponding to 6 communication linesi ai-1, the binary combination A=a of one group 6 can be obtained12、a11、a10、a9、
a8、a7、a6、a5、a4、a3、a2、a1, due to each ai ai-1Have 00,01,10,11 4 kind of combination, therefore just have 212=64 are compiled solution
Code rule.ai ai-1Four kinds of combinations it is just corresponding ... ....
Each encoding and decoding rule has one group of S1, S2, S3, S4, S5, S6, and R1, R2, R3, R4, R5, R6.Wherein, S1
For the transmission code of the 1st circuit, S2 is the transmission code of the 2nd circuit, and S3 is the transmission code of the 3rd circuit；R1 is the 1st circuit
Reception code, R2 is the reception code of the 2nd circuit, and R3 is the reception code of the 3rd circuit, the like.
Each Si is ai ai-1One of four kinds of combinations of 4 obtained 4 Binary Zeros 101,0110,1001,1010.
R1 be same encoding and decoding rule in S1, S2, S3, S4, S5, S6 6 systems of each add and.For remaining R2, R3,
R4, R5, R6, there are R2=S1+S2, R3=S1+S3, Ri=R1+Ri.
212In bar encoding and decoding rule, effective encoding and decoding rule is found out, builds effective encoding and decoding table, method is：
1st step：212In bar encoding and decoding rule, the R1 of AAAA types is filtered out first.AAAA types represent R1 4 digits all phases
Deng if without the R1 of AAAA types, into the 2nd step, otherwise into the 3rd step.
2nd step：212In bar encoding and decoding rule, the R1 of ABAB types is filtered out.In ABAB types expression R1 4 digits, the 1st, 3
Position is the same, and the 2nd, 4 is the same, meanwhile, the 1st and the 2nd bit value difference 1, i.e., | A-B | absolute value be 1, and into the 3rd step.
3rd step：In each bar encoding and decoding rule filtered out by the first step or second step, R2, R3, R4, R5, R6 are screened
Most those encoding and decoding rule of middle AAAA types, due to R2=S1+S2, R3=S1+S3, R4=S1+S4, R5=S1+S5, R6=
S1+S6, that is, filtering out each 4 bit in R2, R3, R4, R5, R6 has 1111 entry.
4th step：Each article of encoding and decoding rule that will be screened by the 3rd step, collects side by side into effective encoding and decoding table 2.Table
What lattice comprised at least shows：S1, S2, S3, S4, S5, S6, and R1, R2, R3, R4, R5, R6.
The encoding and decoding rule of encoder 2 and decoder 7, with reference to table 2.The row number that first behavior of form respectively arranges；First row
For the line number of each row.
2 effective encoding and decoding of table rule
The encoding and decoding rule list one of table 2 shares 38 rows, that is, 38 kinds of code encoding/decoding modes is provided, according to the emission control of device
Device 1, the data obtained to external equipment are grouped according to 4 one group of binary systems, then by the data output of packet to encoder 2
This mode, for one group of 4 bit, it is necessary at least be corresponding with 16 kinds of coded systems, before communicating, transmitting terminal and connect
Receiving end is appointed, from 38 row encoding and decoding rules in table 2, is selected 16 row therein to be used as corresponding 4 bits and is solved to volume
Code mode, form the regular using encoding and decoding of table 3.
Table 3 uses encoding and decoding rule list
Bin in table 3 is classified as 16 4 binary systems that encoder 2 is input to after mission controller 1 is changed, and Hex is classified as
16 corresponding system numbers of Bin row.Each 4 bit that encoder 2 arranges Bin be encoded into corresponding line in table 1 S1 row,
64 binary systems that S2 row, S3 row, S4 row, S5 row, S6 are arranged, S1 row, S2 row, S3 row, S4 row, S5 are arranged, the number of 6 row of S6 row
Value is used separately as the signal output that driver 3 drives 6 road communication lines.The numerical value of S1 row is used to drive the 1st road communication line
The 1st light transmitting antenna LED；S2 row, S3 row, S4 row, S5 row, the numerical value of S6 row, then be used to drive by frequency-selector successively
5 light hair on the 2nd tunnel, the 3rd tunnel, the 4th tunnel, the 5th tunnel, the 6th road communication line in the remaining n-1 light transmitting antenna of selection
Penetrate the LED of antenna.
R1 row, R2 row, R3 row, R4 row, R5 row, 6 row of R6 row are respectively on the 6 road communication lines of selection of receiving terminal
6 light receiver aerials receive the optical signal that transmitting terminal is sent and the output after the processing of decision device 6, R1 are classified as the 1st tunnel and led to
The decision device 6 of letter circuit exports, and the decision device 6 that R2 is classified as the 2nd road communication line exports, and R3 is classified as sentencing for the 3rd road communication line
Certainly device 6 exports, and the decision device 6 that R4 is classified as the 4th road communication line exports, and the decision device 6 that R5 is classified as the 5th road communication line exports,
The decision device 6 that R6 is classified as the 6th road communication line exports.
Wherein, R1 be classified as the 1st tunnel, the 2nd tunnel, the 3rd tunnel, the 4th tunnel, the 5th tunnel, the 6th tunnel 3 road communication lines transmitting terminal hair
Decision device 6 after the superposition of the optical signal gone out exports.What the transmitting terminal that R2 is classified as the 2 road communication lines on the 1st road and the 2nd tunnel was sent
Decision device 6 after the superposition of optical signal exports.The light letter that the transmitting terminal that R3 is classified as the 2 road communication lines on the 1st road and the 3rd tunnel is sent
Number superposition after decision device 6 export.The optical signal that the transmitting terminal that R4 is classified as the 2 road communication lines on the 1st road and the 4th tunnel is sent
Decision device 6 after superposition exports.The superposition for the optical signal that the transmitting terminal that R5 is classified as the 2 road communication lines on the 1st road and the 5th tunnel is sent
Decision device 6 afterwards exports.After the superposition for the optical signal that the transmitting terminal that R6 is classified as the 2 road communication lines on the 1st road and the 6th tunnel is sent
Decision device 6 exports.
Claims (1)
1. a kind of visible ray frequency hopping communications R-T unit, it is characterised in that the device includes transmitting terminal and receiving terminal；Transmitting terminal bag
Mission controller, encoder, driver and light transmission antenna group are included, light transmission antenna group contains n light transmitting antenna, each
Light transmitting antenna is all comprising transmitting filter and LED；Receiving terminal includes receiving controller, decoder, decision device and light receiver aerial
Group, light receiver aerial group have n light receiver aerial, and each light receiver aerial, which includes, receives filter and photelectric receiver；Its
In, n is the natural number more than or equal to 3；
Mission controller electrically connects with encoder；Driver electrically connects with light transmission antenna group, encoder respectively；
Controller is received to electrically connect with decoder；Decision device electrically connects with light receiver aerial group, decoder respectively；
Transmitting filter and reception filter all use band logical filter；Band logical filter can only be used for by the light in some wave-length coverage
Filter out the light beyond this wave-length coverage；The optical signal passband of light transmitting antenna and light receiver aerial, depending on used
The free transmission range of band logical filter, i.e., depending on optical wavelength range that band logical filter can pass through；
Light transmission antenna group meets condition：The optical signal passband of 1st light transmitting antenna includes visible-range, the n-th-j, the
The optical signal passband of n light transmitting antenna is all the subset of the 1st, and the n-th-j is individual, the light of n-th of each smooth transmitting antenna letter
Number passband does not occur simultaneously；J is the natural number less than n and more than 0, and n-j is not equal to 1；
Mission controller, for obtaining data, and the half word by the data of acquisition according to 4 one group of binary systems from external equipment
Save and divided for unit, and export the data of nybble to encoder every time；
Encoder, 4 bits that one is inputted by mission controller, and 4 bits of one group of n are encoded into,
This n 4 bits are exported again to driver；
Driver, for " 1 " and " 0 " signal of n 4 bits exported according to encoder, drive on the communication line of n roads
Light transmitting antenna, represent " 1 " and " 0 " respectively with the two states that LED luminance is different；
Driver, by one group of n 4 bits of encoder output, it is respectively used to n light transmitting antenna；With it is each by
During the 4 bits driving light transmitting antenna of encoder input, by this 4 bit according to order from left to right,
Each clock cycle exports one, is used to drive LED successively；
Light transmitting antenna, under driver control, being changed with the different two states of LED luminance, producing optical signal, and pass through
After crossing the filtering of transmitting filter, sent with the optical signal of some wave-length coverage；
Light receiver aerial, for receiving the optical signal sent from transmitting terminal；
Light receiver aerial group meets condition：The optical signal passband of each light receiver aerial is different；The light of 1st light receiver aerial
Signal passband includes visible-range, the n-th-j, the optical signal passband of n-th of light receiver aerial be all the subset of the 1st, and
N-th-j is individual, the optical signal passband of n-th of each light receiver aerial does not occur simultaneously；Meanwhile the optical signal of the 1st light receiver aerial
Passband, is the subset of the 1st transmitting filter optical signal passband again, the optical signal passband of the n-th-j light receiver aerials, be n-th again-
The subset of j transmitting filter signal passband, the optical signal passband of n-th of light receiver aerial, is n-th of transmitting filter optical signal again
The subset of passband；
Photelectric receiver, for receiving the optical signal after received filter filters, and it is converted into analog electrical signal output；
Decision device, for receiving the analog electrical signal of photelectric receiver output, and data signal output is converted to, for each light
Electric receiver, all in each clock cycle, the data signal of one judgement of output；
Decoder, the data signal for decision device to be exported are reduced into one group of n 4 digits, and by the 4 digit solutions of the n
Code exports into 4 bits；
Controller is received, for the output of decoder to be reduced into former data, and the former data output for receiving and restoring is arrived
External equipment；
N light transmitting antenna of light transmission antenna group, the n light receiver aerial with light receiver aerial group, according to the logical of optical signal
Band corresponds, and forms n communication line；
The decoding method of encoder and decoder is：
Each communication line is just obtained into n 2 bits with 2 binary representations, n circuit：a2m a2m-1, amFor
1 bit 1 or 0, i.e.,：am={ 0,1 }, m are more than or equal to 1 and are less than or equal to n；Therefore, the 1st antenna corresponds to a2 a1,
2nd antenna corresponds to a4 a3, m-th of antenna correspond to a2m a2m-1；For 2 bits：a2m a2m-1, just have 00,01,10,
11 4 kinds of situations, then to amEncoded, work as amWhen=0, binary number 01 is encoded into；Work as amWhen=1, binary number is encoded into
10；That is, a2m a2m-1Four kinds of situations just correspond to obtain 44 Binary Zeros 101,0110,1001,1010；
N a corresponding to n communication line2m a2m-1, binary combination A=a of one group of 2n position can be obtained2n a2n-1…am…a2
a1, due to each a2m a2m-1Have 00,01,10,11 4 kind of combination, therefore just have 22nBar encoding and decoding rule；
Each encoding and decoding rule has one group of S1, S2, Sm, Sn-1, Sn, and R1, R2, Rm, Rn-1, Rn；Wherein, S1 is the 1st
The transmission code of individual circuit, S2 are the transmission code of the 2nd circuit, and Sm is the reception code of m-th of circuit, and Sn-1 is (n-1)th circuit
Transmission code, Sn is the transmission code of n-th circuit；R1 is the reception code of the 1st circuit, and R2 is the reception code of the 2nd circuit, Rm
For the reception code ... of m-th of circuit, Rn-1 is the reception code of (n-1)th circuit, and Rn is the reception code of n-th of circuit；
Each Sm is a2m a2m-1One of four kinds of combinations of 4 obtained 4 Binary Zeros 101,0110,1001,1010；R1 is
The n systems of each of S1, S2, Sm, Sn-1, Sn in same encoding and decoding rule add and；For remaining R2, Rm, Rn-1,
Rn, there is Rm=S1+Sm；
22nIn bar encoding and decoding rule, effective encoding and decoding rule is found out, builds effective encoding and decoding table, method is：
1st step：22nIn bar encoding and decoding rule, the R1 of AAAA types is filtered out first；AAAA types represent that R1 4 digits are all equal,
If without the R1 of AAAA types, into the 2nd step, otherwise into the 3rd step；
2nd step：22nIn bar encoding and decoding rule, the R1 of ABAB types is filtered out；In ABAB types expression R1 4 digits, the 1st, 3 one
Sample, the 2nd, 4 is the same, meanwhile, the 1st and the 2nd bit value difference 1, i.e., | A-B | absolute value be 1, and the 3rd step of entrance；
3rd step：In each bar encoding and decoding rule filtered out by the first step or second step, in screening R2, Rm, Rn-1, Rn
Most those encoding and decoding rule of AAAA types, due to Rm=S1+Sm, that is, filters out each 4 bit in R2, Rm, Rn-1, Rn,
1111 k most entries；K is the natural number more than or equal to 16；
4th step：Each article of encoding and decoding rule that will be screened by the 3rd step, collects side by side into effective encoding and decoding table；Form is at least
Including show：S1, S2, Sm, Sn-1, Sn, and R1, R2, Rm, Rn-1, Rn；
In transmitting terminal, the coding of encoder uses the S1 row of effective encoding and decoding table, S2 row, Sm row, Sn-1 row, Sn row；Receiving
End, the decoding of decoder use the R1 row of effective encoding and decoding table, R2 row, Rm row, Rn-1 row, Rn row；
Output data for mission controller with effective encoding and decoding table, it is necessary to establish corresponding relation；By being 3,4,5,6 to n
Derivation understand, by building effective coding schedule, available encoding and decoding entry number, necessarily more than or equal to 16；Therefore, tie
Entry number is closed, corresponding relation is established between input data and effective each entry of encoding and decoding table；Corresponding relation can be it is static and
Dynamically two kinds；Static state is corresponding：In k entry of efficient coding table, fixed select 16 entries and data therein 16
Individual 4 binary systems are corresponding；Dynamic is corresponding：In k entry of effective encoding and decoding table, selection 16 bars therein of change
Mesh is corresponding to 16 4 binary systems of data；The corresponding relation of encoding and decoding entry and data is not fixed in communication process,
It can be changed according to the rule of setting；
The cataloged procedure of device is as follows：
In transmitting terminal, encoder is found relative for 4 binary systems of output data of mission controller in effective encoding and decoding table
The encoding and decoding entry answered, 4 bits of the input are encoded into S1 row, S2 row, S3 row, the Sm of form respective entries row
N 4 bits of the row that row, Sn-1 row, Sn are arranged, S1 row, S2 row, S3 row, Sm are arranged, the number of each row of Sn-1 row, Sn row
Value is used separately as the signal output of driver driving n roads communication line；The numerical value of S1 row is used to drive on the 1st road communication line
The LED of 1st light transmitting antenna；The numerical value of S2 row is used for the LED for driving the 2nd light transmitting antenna on the 2nd road communication line；
The numerical value of S3 row is used for the LED for driving the 3rd light transmitting antenna on the 3rd road communication line；The like；
The decoding process of device is as follows：
In n 4 bits that receiving terminal, decoder export for decision device, found in effective encoding and decoding table corresponding
The R1 row of encoding and decoding entry, R2 row, Rm row, Rn-1 row, Rn row n row numerical value, and thereby determine that corresponding encoding and decoding
Entry；Corresponding relation in transmitting terminal input data and effective encoding and decoding table further according to agreement between each entry；Decode and connect
The reception data output of receiving end；
The numerical value for the n row that R1 row, R2 row, Rm row, Rn-1 row, Rn are arranged is n light-receiving day on the n roads communication line of receiving terminal
Line receives the optical signal that transmitting terminal is sent and the output after decision device is handled；Wherein, R1 is classified as the 1st road communication line
Decision device exports, and R2 is classified as the decision device output of the 2nd road communication line, and R3 is classified as the decision device output of the 3rd road communication line, R4
The decision device output of the 4th road communication line is classified as, by that analogy；
Wherein, R1 be classified as the 1st tunnel, the 2nd tunnel, m roads, the (n-1)th tunnel, the n-th tunnel n roads communication line transmitting terminal send light letter
Number superposition after decision device output；The optical signal that the transmitting terminal that R2 is classified as the 2 road communication lines on the 1st road and the 2nd tunnel is sent
Decision device output after superposition；The superposition for the optical signal that the transmitting terminal that Rm is classified as the 2 road communication lines on the 1st road and m roads is sent
Decision device output afterwards；After the superposition for the optical signal that the transmitting terminal that Rn is classified as the 2 road communication lines on the 1st road and the n-th tunnel is sent
Decision device exports.
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| CN1249098A (en) * | 1997-03-07 | 2000-03-29 | 贝瑞特控股公司 | Improvement in ultrafast time hopping CDMA-RF |
| CN103023567A (en) * | 2012-11-21 | 2013-04-03 | 中兴通讯股份有限公司 | Visible light communication method, device and system |
| CN104205677A (en) * | 2012-04-13 | 2014-12-10 | 皇家飞利浦有限公司 | Method and device for visible light communication |
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| US7076168B1 (en) * | 1998-02-12 | 2006-07-11 | Aquity, Llc | Method and apparatus for using multicarrier interferometry to enhance optical fiber communications |
| US8724998B2 (en) * | 2011-06-17 | 2014-05-13 | Nec Laboratories America, Inc. | Carrier and subcarrier hopping for optical OFDM security |
| US8879604B2 (en) * | 2011-07-06 | 2014-11-04 | Cisco Technology, Inc. | Efficient rendezvous for distributed messages in frequency-hopping communication networks |
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| CN1249098A (en) * | 1997-03-07 | 2000-03-29 | 贝瑞特控股公司 | Improvement in ultrafast time hopping CDMA-RF |
| CN104205677A (en) * | 2012-04-13 | 2014-12-10 | 皇家飞利浦有限公司 | Method and device for visible light communication |
| CN103023567A (en) * | 2012-11-21 | 2013-04-03 | 中兴通讯股份有限公司 | Visible light communication method, device and system |
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Application publication date: 20160420 Assignee: Guilin Langgu Technology Co.,Ltd. Assignor: GUILIN University OF TECHNOLOGY Contract record no.: X2022450000047 Denomination of invention: A Visible Frequency Hopping Communication Transceiver Granted publication date: 20180112 License type: Common License Record date: 20221117 |