CN106330314A - High-power broadband bias device used for visible light communication - Google Patents
High-power broadband bias device used for visible light communication Download PDFInfo
- Publication number
- CN106330314A CN106330314A CN201610912475.7A CN201610912475A CN106330314A CN 106330314 A CN106330314 A CN 106330314A CN 201610912475 A CN201610912475 A CN 201610912475A CN 106330314 A CN106330314 A CN 106330314A
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- Prior art keywords
- parallel
- resistance
- inductance
- visible light
- bias
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/114—Indoor or close-range type systems
- H04B10/116—Visible light communication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
Abstract
A high-power broadband bias device used for visible light communication comprises a first capacitor and a second capacitor which are used for preventing direct current components and connected in parallel. The input end obtained after parallel connection is connected with an external radio frequency signal, and the output end obtained after parallel connection is sequentially connected with four bias units connected in parallel and sequentially passes the four parallel connected bias units to the outputting end. The high-power broadband bias device used for visible light communication makes the BVL communication technology used in a large SMD LED matrix or high-power LED array.
Description
Technical field
The present invention relates to a kind of broadband bias device.Particularly relate to a kind of broadband high-power broadband for visible light communication
Bias device.
Background technology
In recent years, the fast development in white light LEDs field makes its source radiated as a kind of efficiency light, instead of visible
Conventional light source in optical range, such as mercury vapor light and electric filament lamp.These development result in the major transformation of lighting engineering.White light
The physical property of LED allows it to be used in communication, and this physical essence, including the trend of lighting engineering change, cause appearance
One new research direction, is typically called visible light communication (VLC).This new research direction is based on initial work completely
Make under the spectrum of infrared radiation, be commonly referred to as the derivant (indoor OWC) of the research direction of indoor wireless optical communication.
In 2003, Y.Tanaka was on his paper, it is proposed that utilize white led lamps to produce the room light number of non-fiber
According to network theory.In this case, a White LED is made up of three RGB chips.Transfer rate reaches 400Mbps.?
2010, by adding blue filter disc and using OFDM modulation system, transfer rate can reach 513Mbps.This author estimates
It is expected to break through 1Gbps in a few years from now on transfer rate.In October, 2011, Harald Haas initially forms a group and claims
For LI-FI, including research and industrial organization.The purpose of this group is to realize the construction of duplex communication system based on VLC.?
In August, 2013, this tissue proposes a transmission system can make traffic rate reach 1.6Gbps.Lead to another team in 2015
Cross use balancing technique and reach equifinality.At the end of 2015, this team reaches by using self-adaptive background updatemodel
The transfer rate of 2Gbps.According to nearest statement, the VLC system that transfer rate is 10Gbps is being studied by LIFI team.
Broadband visible ray (BVL) is a new research direction based on VLC.Secondly, the direction attempts utilizing visible ray
Light radiation is sent to end user's (download) as a communication direction and utilizes infrared spectrum reverse link communication direction (uploading)
Light radiation (850nm；950nm).Additionally, compared with VLC concept, in the case of BVL, its purpose is to use chipset
Broadband over power line (BPL) technology, refer to limited bandwidth between 2-30MHz, traffic rate generally more than 1Mbps electric lines of force carry
Wave communication.Power line communication technology utilizes the medium that existing strong and reliable electric lines of force transmits as information, passes through carrier system
Transmission analog or digital signal.Electric lines of force can be directly utilized, without rewiring, networking simple and fast, lower cost, application
Scope is wide, ensures information safety simultaneously.Including allowing to use OFDM to modulate lattice from 2 megahertzs to 32 megahertzs in frequency range
Formula.BVL technology, for its character, it is possible to achieve the transmission speed of 100Mbps.
For realizing above-mentioned transmission speed, it is especially desirable to select the bias device model of a suitable BVL.All mention
Scientific results shows, the most correct method is to use generally based on Bias-T as feeding switch point in radio-frequency technique
Bias device concept.One Bias-T is one does not affect other assemblies for arranging the Dc bias point of some electronic devices and components
Three-port network.This direct current biasing device is a duplexer.This concept is proved to be the concept to following duplex communication
An interesting solution.
Summary of the invention
The technical problem to be solved is to provide one can make BVL communication technology at large-scale SMD LED
Matrix or based on the broadband high-power broadband bias device for visible light communication in high-power LED array.
The technical solution adopted in the present invention is: a kind of broadband high-power broadband bias device for visible light communication, its
Being characterised by, include: be used for stoping the first electric capacity being in parallel and second electric capacity of DC component, the input after parallel connection connects
External radio-frequency signal, the defeated end after parallel connection is sequentially connected with four bias units being in parallel, and passes sequentially through four and be in parallel
Bias unit is to outfan.
The bias unit structure that described four are in parallel is identical, and each bias unit includes: be used for pressing down
First inductance of low frequency processed and the second inductance, the first resistance and the second resistance, described first inductance and described first resistor coupled in parallel
Connecting, described second inductance is connected with described second resistor coupled in parallel, wherein, and the first inductance after parallel connection and one end of the first resistance
Connect the outfan after described first electric capacity and the second electric capacity parallel connection, and pass sequentially through the 3rd resistance and the 3rd capacity earth,
The first inductance after parallel connection and the other end of the first resistance with in parallel after the second inductance and one end of the second resistance common the most successively
By the 4th resistance and the 4th capacity earth, the second inductance after parallel connection and another termination external power source of the second resistance.
A kind of broadband high-power broadband bias device for visible light communication of the present invention, it is possible to make BVL communication technology use
In at large-scale SMD LED matrix or based in high-power LED array, specifically have the advantage that
1, need not the LED of transmitting terminal in visible light communication system is carried out the setting of extra DC point, simplify
Circuit structure.
2, the signal received can be carried out alternating current-direct current energy separation, using DC signal output as rear class at receiving terminal
The energy source of receiving terminal circuit, provides running voltage for circuit, and AC signal separates output simultaneously, is transferred to backend amplifier
Circuit and digital circuit process.
3, by current loading being distributed to multiple branch to reach bandwidth more higher than original design and and bigger merit
Rate.Use this design can obtain bigger effective propagation path or promoting transmission rate on the original basis at transmitting terminal.
Accompanying drawing explanation
Fig. 1 is the present invention circuit theory diagrams for the broadband high-power broadband bias device of visible light communication；
Fig. 2 is the first example schematic that the present invention applies in visible light communication system；
The second example schematic that Fig. 3 present invention applies in visible light communication system.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, a kind of of the present invention is biased for the broadband high-power broadband of visible light communication
Device is described in detail.
A kind of broadband high-power broadband bias device for visible light communication of the present invention, includes: be used for stoping direct current
The first electric capacity C1 being in parallel of component and the second electric capacity C2, the input after parallel connection connects external radio-frequency signal RF, after parallel connection
Defeated end is sequentially connected with four bias units being in parallel, and passes sequentially through four bias units being in parallel to outfan DC+RF.
The bias unit structure that described four are in parallel is identical, and each bias unit includes: be used for pressing down
The first inductance L1/L3/L5/L7 and the second inductance L2/L4/L6/L8 of low frequency processed, the first resistance Rl/R5/R9/R13 and second electricity
Resistance R2/R6/R10/R14, described first inductance L1/L3/L5/L7 are connected in parallel with described first resistance Rl/R5/R9/R13, institute
State the second inductance L2/L4/L6/L8 to be connected in parallel with described second resistance R2/R6/R10/R14, wherein, the first electricity after parallel connection
After one end of sense L1/L3/L5/L7 and the first resistance Rl/R5/R9/R13 connects described first electric capacity C1 and the second electric capacity C2 parallel connection
Outfan, and pass sequentially through the 3rd resistance R3/R7/R11/R16 and the 3rd electric capacity C3/C5/C7/C9 ground connection, after parallel connection
The other end of the first inductance L1/L3/L5/L7 and the first resistance Rl/R5/R9/R13 with in parallel after the second inductance L2/L4/L6/
One end of L8 and the second resistance R2/R6/R10/R14 passes sequentially through the 4th resistance R4/R8/R12/R15 and the 4th electric capacity C4/ jointly
Outside another termination of C6/C8/C10 ground connection, the second inductance L2/L4/L6/L8 after parallel connection and the second resistance R2/R6/R10/R14
Portion power supply DC.
A kind of broadband high-power broadband bias device for visible light communication of the present invention, will at external radio-frequency signal RF end
First electric capacity C1 and the 2nd C2 parallel join are used for stoping DC component.First inductance L1 and the 2nd L2 plays the work of suppression low frequency
With.It is for the smooth insulation characterisitic being defined as S31 parameter with the first resistance Rl and the second resistance R2 of coils from parallel connection of coils.Along with even
Connect the first resistance Rl and the increase of the second resistance R2 parallel resistance of inductance, the in-depth of insulation characterisitic parameter S31 can be increased.S31
Parameter is defined as how much being suppressed from the signal of DC input to RF+DC end output procedure.When S31 curve is long in whole bandwidth
Just reach, when obtaining smooth on degree, the perfect condition that we are required.
A kind of broadband high-power broadband bias device (Bias-T in figure) for visible light communication of the present invention can be by
The feeding switch point being considered in radio-frequency technique, based on the first inductance LI curve and the AC compounent comprising transmission information, passes through
Direct current signal is connected with assembly and determines the DC point of LED.For this concept, optimal is those
Modulation system based on keying carrier.Design bias device main obstacle is that good direct current result and required frequency
Rate bandwidth combines.If using a kind of broadband high-power broadband bias device for visible light communication of the present invention as BVL
The manipulator of system, in the design phase, it is necessary to consider the different parameter of radio-frequency technique.Research emphasis of the present invention is several to several
Ten GHz, but the bandwidth of 1-300 megahertz is suitable for completely.Relatively low frequency range is to be completely suitable for BVL system.
Very important parameter includes maximum current and maximum voltage, and these are that the one of the present invention is for visible light communication
Broadband high-power broadband bias device can control.Owing to the performance of the optical emitter in lighting engineering is different, from several
Ten watts are arrived several hectowatts, so only by making a high inductance value of inductance acquirement build a high IDCmaxThe Bias-T of value is impossible
's.Deteriorate S parameter current loading is distributed to multiple branch be an appropriate side without prejudice to BVL concept to sacrifice
Method.Therefore, a kind of broadband high-power broadband bias device for visible light communication of the present invention is by being distributed to current loading
Multiple branches design one broadband high-power broadband bias device for visible light communication of acquisition.
As in figure 2 it is shown, a kind of broadband high-power broadband bias device for visible light communication of the present invention is (in figure
Bias-T) a kind of application.In visible light communication system transmitting terminal, it is possible to use the one of the present invention is used for visible light communication
Broadband high-power broadband bias device (T-shaped bias device) by the direct-current working volts of LED and front end input signal
Respectively from two port inputs of A, B, make signal be coupling in DC level, export to LED commonly through C point,
Make LED can with normal luminous and include wherein front end to information.
As it is shown on figure 3, a kind of broadband high-power broadband bias device for visible light communication of the present invention is (in figure
Bias-T) another kind of application.In visible light communication system receiving terminal, it is possible to use by the one of the present invention for visible ray
The signal received is passed through to input from the C end of T-shaped bias device by the broadband high-power broadband bias device (T-shaped bias device) of communication,
After bias device, being exported from B end by AC signal, DC component exports from A end, can be used to the amplifier of receiving terminal and
Modulation module provides DC source, from without using the extra of other to power.
Claims (2)
1. the broadband high-power broadband bias device for visible light communication, it is characterised in that include: be used for stoping direct current
First electric capacity (C1) being in parallel of component and the second electric capacity (C2), the input after parallel connection connects external radio-frequency signal (RF), and
Defeated end after connection is sequentially connected with four bias units being in parallel, and passes sequentially through four bias units being in parallel to outfan
(DC+RF)。
A kind of broadband high-power broadband bias device for visible light communication the most according to claim 1, it is characterised in that
The bias unit structure that described four are in parallel is identical, and each bias unit includes: for suppressing low frequency
First inductance (L1/L3/L5/L7) and the second inductance (L2/L4/L6/L8), the first resistance (Rl/R5/R9/R13) and the second resistance
(R2/R6/R10/R14), described first inductance (L1/L3/L5/L7) is in parallel with described first resistance (Rl/R5/R9/R13) even
Connecing, described second inductance (L2/L4/L6/L8) is connected in parallel, wherein, after parallel connection with described second resistance (R2/R6/R10/R14)
The first inductance (L1/L3/L5/L7) and one end of the first resistance (Rl/R5/R9/R13) connect described first electric capacity (C1) and the
Outfan after two electric capacity (C2) parallel connection, and pass sequentially through the 3rd resistance (R3/R7/R11/R16) and the 3rd electric capacity (C3/C5/
C7/C9) ground connection, the first inductance (L1/L3/L5/L7) after parallel connection and the other end of the first resistance (Rl/R5/R9/R13) with also
The second inductance (L2/L4/L6/L8) and one end of the second resistance (R2/R6/R10/R14) after connection pass sequentially through the 4th electricity jointly
Resistance (R4/R8/R12/R15) and the 4th electric capacity (C4/C6/C8/C10) ground connection, the second inductance (L2/L4/L6/L8) after parallel connection and
Another termination external power source (DC) of second resistance (R2/R6/R10/R14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610912475.7A CN106330314A (en) | 2016-10-20 | 2016-10-20 | High-power broadband bias device used for visible light communication |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610912475.7A CN106330314A (en) | 2016-10-20 | 2016-10-20 | High-power broadband bias device used for visible light communication |
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| CN201610912475.7A Pending CN106330314A (en) | 2016-10-20 | 2016-10-20 | High-power broadband bias device used for visible light communication |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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) |
| WO2014070779A1 (en) * | 2012-10-30 | 2014-05-08 | Anayas360.Com, Llc. | Address based serial communication interface for control and monitoring of system-on-chip implementations |
| CN205566310U (en) * | 2016-04-29 | 2016-09-07 | 山西大同大学 | Send ware device based on OFDM visible light communication system |
-
2016
- 2016-10-20 CN CN201610912475.7A patent/CN106330314A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014070779A1 (en) * | 2012-10-30 | 2014-05-08 | Anayas360.Com, Llc. | Address based serial communication interface for control and monitoring of system-on-chip implementations |
| 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) |
| CN205566310U (en) * | 2016-04-29 | 2016-09-07 | 山西大同大学 | Send ware device based on OFDM visible light communication system |
Non-Patent Citations (1)
| Title |
|---|
| TOMAS STRATIL 等: "Design and Testing of High Power Wideband Bias-T for Broadband over Visible Light using Software-Defined Radio", 《WIRELESS AND MICROWAVE TECHNOLOGY CONFERENCE (WAMICON), 2016 IEEE 17TH ANNUAL》 * |
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Application publication date: 20170111 |