CN106712849A - Optical frequency comb based indoor millimeter wave and visible light communication hybrid multi-access method - Google Patents
Optical frequency comb based indoor millimeter wave and visible light communication hybrid multi-access method Download PDFInfo
- Publication number
- CN106712849A CN106712849A CN201611092526.2A CN201611092526A CN106712849A CN 106712849 A CN106712849 A CN 106712849A CN 201611092526 A CN201611092526 A CN 201611092526A CN 106712849 A CN106712849 A CN 106712849A
- Authority
- CN
- China
- Prior art keywords
- visible light
- light communication
- frequency
- optical
- frequency comb
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/35—Non-linear optics
- G02F1/353—Frequency conversion, i.e. wherein a light beam is generated with frequency components different from those of the incident light beams
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2/00—Demodulating light; Transferring the modulation of modulated light; Frequency-changing of light
- G02F2/02—Frequency-changing of light, e.g. by quantum counters
-
- 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
- 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
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
- H04B10/25752—Optical arrangements for wireless networks
-
- 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
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
-
- 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
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
- H04B10/5165—Carrier suppressed; Single sideband; Double sideband or vestigial
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2854—Wide area networks, e.g. public data networks
- H04L12/2856—Access arrangements, e.g. Internet access
Abstract
The invention discloses an optical frequency comb based indoor millimeter wave and visible light communication hybrid multi-access method, which comprises the steps that an external cavity laser and a radio frequency source are adopted to drive a Mach-Zehnder modulator to generate optical frequency combs with the spacing being 25GHz, data is modulated to the optical frequency combs and transmitted to a base station unit through an optical fiber link, two optical carriers with the frequencies being 193.05THz and 193.15THz respectively are selected by using a wavelength selection switch, 100GHz millimeter wave signals are generated after the beat frequency is subjected to photoelectric detection, and wireless access is realized. Meanwhile, for visible light communication transmission, an optical band pass filter is adopted to select an optical carrier with the frequency being 193.1THz so as to be used for light-emitting diode (LED) based visible light communication, and another optical band pass filter is adopted to select an optical carrier with the frequency being 193.125THz so as to be used for laser diode (LD) based visible light communication, so that two different modes of visible light communication are realized. The method disclosed by the invention can effectively solves defects of a single indoor access mode, improves the flexible and the controllability of indoor access, and has innovative practical values.
Description
(1) technical field
The invention belongs to optical-fiber wireless signal transmission and technical field of visible light communication.
(2) background technology
Although optical fiber can provide larger bandwidth and relatively low loss, it is contemplated that its cost higher and poor
Flexibility, for indoor access, it is not a selection well.And wireless signal because its have mobility and flexibly
Property, obtain increasing concern.Low-frequency range being used in wireless signal, bandwidth resources are nervous, in order to obtain bigger bandwidth, people more
The high band that begins one's study transmission of wireless signals, such as Ka-band, V-band, E-band and W-band.
Additionally, in order to solve the problems, such as that radio spectrum resources are not enough, in the urgent need to a kind of effective communication mode, then may be used
See that optic communication is just occurred in that.The frequency band of visible ray is from 384THz to 789THz, that is to say, that have the frequency of about 400THz unauthorizeds
Section can be used.And it is safer than radio communication, at some to electromagnetic interference than more sensitive place, it would however also be possible to employ
Visible light communication.Because China will replace the incandescent lamp, LED-based visible light communication will to have huge in future using LED
Application potential, it can not only realize illumination, and take into account the function of data communication.
But the modulation bandwidth and larger launch angle by LED are limited, it is difficult to meet the indoor access of two-forty
Rate requirement, and its transmission range is also limited, therefore, to improve the transmission rate and transmission range of visible light communication, it is necessary to
Using new light source.Recently, the visible light communication based on LD attract attention, and it can provide bigger modulation bandwidth
With farther transmission range.And its directionality is relatively good, Internet of Things the inside is can be used in the future, be controlled operation.But its
Installation cost and illumination aspect, are the problems for needing to consider.
(3) content of the invention
The present invention is directed to above-mentioned situation, solves the deficiency of indoor access way unification, improves the spirit of indoor access
Activity, the practical value with novelty.
In order to achieve the above object, specific method of the present invention is as follows：
In hub unit, Mach-Zehnder modulators are driven to produce jointly using outside cavity gas laser and 25GHz radio frequency sources
Raw frequency comb；Data signal generator produces base-band data signal, by a Mach-Zehnder modulators, data are direct
Modulate on optical signal；Regulation Polarization Controller causes that the Mach-Zehnder modulators power output of modulation data is maximized；Adjust
Mode processed is modulated using light double-sideband；Transmitted to base station unit through optical fiber link, mended using an erbium-doped fiber amplifier
Repay the loss of optical fiber link and device junction；For being wirelessly transferred, using wavelength-selective switches, selecting frequency is
Two light carriers of 193.05THz and 193.15THz, after Photoelectric Detection beat frequency, produce the millimeter-wave signal of 100GHz, and will
Optical signal is converted to electric signal；In subscriber unit, sending and receiving for wireless signal is realized using transmitting antenna and reception antenna；
Envelope detected is carried out to millimeter-wave signal by a power detector and signal is demodulated using demodulation receiver module；It is right
In LED-based visible light communication, using optical band pass filter, select frequency and be the optical signal of 193.1THz, and use light
Photodetector carries out opto-electronic conversion；In subscriber unit, illumination is realized by a LED and is communicated；Using an avalanche diode,
Signal to receiving carries out opto-electronic conversion, and electric signal is demodulated by demodulating receiver module；For based on the visible of LD
Optic communication, using optical band pass filter, selects the optical signal that frequency is 193.125THz, using photoelectric detector by optical signal
Be converted to electric signal；In subscriber unit, modulated the signal to by a LD and high-speed communication is realized on light carrier, and determined using it
Tropism, can carry out accurate oriented control operation；Using an avalanche diode, opto-electronic conversion is realized, mould is received by demodulating
Block is demodulated to electric signal, recovers initial data.
The present invention carries out different types of indoor access by using frequency comb technology, solves access way in single ventricle
Deficiency, improve flexibility and the combination property of indoor access.
(4) illustrate
Fig. 1 is the implementation structural representation that the present invention is implemented；
Fig. 2 is the frequency comb that the present invention is produced；
Fig. 3 is the structural representation of the hub unit that the present invention is implemented；
Fig. 4 is the structural representation of the base station unit that the present invention is implemented；
Fig. 5 is the structural representation of the subscriber unit that the present invention is implemented；
Fig. 6 is the downlink transfer link schematic diagram for mixing multi-access systems in the optical-fiber wireless room of present invention implementation；
Fig. 1, Fig. 3, the numeral in Fig. 4, Fig. 5 and Fig. 6 represent following experiment apparatus respectively：
1- outside cavity gas lasers (ECL)
2- Mach-Zehnder modulators 1
3- radio frequency sources
4- Polarization Controllers (PC)
5- data signal generators
6- Mach-Zehnder modulators 2
7- optical fiber links (SSMF)
8- erbium-doped fiber amplifiers (EDFA)
9- wavelength-selective switches (WSS)
10- photoelectric detectors 1 (PD1)
11- transmitting antennas
12- reception antennas
13- power detectors
14- demodulates receiver module 1
15- optical band pass filters 1 (OBPF1)
16- photoelectric detectors 2 (PD2)
17- light emitting diodes (LED)
18- avalanche photodides 1 (APD1)
19- demodulates receiver module 2
20- optical band pass filters 2 (OBPF2)
21- photoelectric detectors 3 (PD3)
22- laser diodes (LD)
23- avalanche photodides 2 (APD2)
24- demodulates receiver module 3
25- hub units (CS)
26- base station units (BS)
27- subscriber units
(5) specific embodiment
With reference to specific experiment example and accompanying drawing, the present invention is illustrated.
As shown in Figure 1, based on frequency comb each part difference of indoor millimeter-wave and visible light communication mixing multi-access method
It is described as follows：
Outside cavity gas laser 1, for the continuous wave light carrier for producing frequency to be 193.1THz；
Mach-Zehnder modulators 2, the frequency comb for producing different wave length；
Radio frequency source 3, for realizing equally spaced frequency comb, spacing frequency is equal to the frequency of radio frequency source；
Polarization Controller 4, the polarization state of the data-signal for controlling to enter Mach-Zehnder modulators, exports it
Maximum optical power；
Data signal generator 5, for producing base-band data signal；
Mach-Zehnder modulators 6, for base-band data signal to be modulated to light carrier；
Optical fiber link 7, for transmitting light data signal；
Erbium-doped fiber amplifier 8, for amplifying through the signal power after Optical Fiber Transmission；
Wavelength-selective switches 9, for leaching two light carriers that frequency is 193.05THz and 193.15THz；
Photoelectric detector 10, for realizing opto-electronic conversion, and beat frequency produces 100GHz millimeter-wave signals；
Transmitting antenna 11, for launching millimeter-wave signal；
Reception antenna 12, for receiving the millimeter-wave signal after being wirelessly transferred；
Power detector 13, for carrying out envelope detected to millimeter wave, realizes down-conversion operation；
Demodulation receiver module 14, for being demodulated to electric data-signal；
Optical band pass filter 15, for leaching the light carrier that frequency is 193.1THz；
Photoelectric detector 16, for opto-electronic conversion；
Light emitting diode 17, for modulating data on light, while realizing illumination；
Avalanche photodide 18, for receiving through the signal after transmission of visible light, and carries out opto-electronic conversion；
Demodulation receiver module 19, for being demodulated to electric data-signal；
Optical band pass filter 20, for leaching the light carrier that frequency is 193.125THz；
Photoelectric detector 21, for opto-electronic conversion；
Laser diode 22, for modulating data on visible laser；
Avalanche photodide 23, for receiving the signal after being transmitted through visible laser, and carries out opto-electronic conversion；
Demodulation receiver module 24, for being demodulated to electric data-signal；
Hub unit 25, for producing frequency comb and area of light data-signal；
Base station unit 26, for selecting different light carriers, to realize different types of indoor access；
Subscriber unit 27, the fusion for realizing different access ways；
Fig. 2 is the frequency comb that the present invention is produced；
Fig. 3 is the structural representation of hub unit of the invention, including：
Outside cavity gas laser 1, for the continuous wave light carrier for producing frequency to be 193.1THz；
Mach-Zehnder modulators 2, the frequency comb for producing different wave length；
Radio frequency source 3, for realizing equally spaced frequency comb, spacing frequency is equal to the frequency of radio frequency source；
Polarization Controller 4, the polarization state of the data-signal for controlling to enter Mach-Zehnder modulators, exports it
Maximum optical power；
Data signal generator 5, for producing base-band data signal；
Mach-Zehnder modulators 6, for base-band data signal to be modulated to light carrier；
Fig. 4 is the structural representation of base station unit of the invention, including：
Erbium-doped fiber amplifier 8, for amplifying the power through the signal after optical fiber output；
Wavelength-selective switches 9, for leaching two light carriers that frequency is 193.05THz and 193.15THz；
Photoelectric detector 10, for realizing opto-electronic conversion, and beat frequency produces 100GHz millimeter-wave signals；
Optical band pass filter 15, for leaching the light carrier that frequency is 193.1THz；
Photoelectric detector 16, for opto-electronic conversion；
Optical band pass filter 20, for leaching the light carrier that frequency is 193.125THz；
Photoelectric detector 21, for opto-electronic conversion；
Fig. 5 is the structural representation of subscriber unit of the invention, including：
Transmitting antenna 11, for launching millimeter-wave signal；
Reception antenna 12, for receiving the millimeter-wave signal after being wirelessly transferred；
Power detector 13, for carrying out envelope detected to millimeter wave, realizes down-conversion operation；
Demodulation receiver module 14, for being demodulated to electric data-signal；
Light emitting diode 17, for modulating data on light, while realizing illumination；
Avalanche photodide 18, for receiving through the signal after transmission of visible light, and carries out opto-electronic conversion；
Demodulation receiver module 19, for being demodulated to electric data-signal；
Laser diode 22, for modulating data on visible laser；
Avalanche photodide 23, for receiving the signal after being transmitted through visible laser, and carries out opto-electronic conversion；
Demodulation receiver module 24, for being demodulated to electric data-signal；
Fig. 6 is the downlink transfer link schematic diagram for mixing multi-access systems in optical-fiber wireless room of the invention, including：
Hub unit 25, for producing frequency comb and area of light data-signal；
Optical fiber link 7, for transmitting light data signal；
Base station unit 26, for selecting different light carriers, to realize different types of indoor access；
Subscriber unit 27, the fusion for realizing different access ways；
The indoor mixing multi-access systems course of work of the present invention based on frequency comb is as follows：
In hub unit 25, by outside cavity gas laser 1 and radio frequency source 3 Mach-Zehnder modulators 2 are driven come
Produce the frequency comb at intervals of 25GHz；The base band data for being produced data signal generator 5 using Mach-Zehnder modulators 6
Signal shock is on optical signal；By tuning Polarization Controller 4 so that the power output of Mach-Zehnder modulators 6 is maximum
Change；Modulation system is modulated using light double-sideband；Transmitted to base station unit 26 through optical fiber link 7, put using an Er-doped fiber
Big device 8 carrys out the loss of compensated fiber link and device junction；For being wirelessly transferred, by wavelength-selective switches 9, frequency is selected
Rate is two light carriers of 193.05THz and 193.15THz；The millimeter wave for producing 100GHz by the beat frequency of photoelectric detector 10 is believed
Number, and convert optical signals to electric signal；Subscriber unit 27 is arrived, wireless milli has been realized using transmitting antenna 11 and reception antenna 12
Metric wave signal sends and receives；Envelope detected is carried out to millimeter-wave signal by a power detector 13, down coversion is realized
Operation, and signal is demodulated using demodulation receiver module 14；For the transmission of visible light based on light emitting diode (LED),
Using optical band pass filter 15, the light carrier that frequency is 193.1THz is selected, and photoelectricity turn is carried out using photoelectric detector 16
Change；In subscriber unit 27, by light emitting diode 17, realize illumination and communicate；Using an avalanche diode 18, to what is received
Opto-electronic conversion is carried out to signal, and electric signal is demodulated by demodulating receiver module 19；For based on laser diode
(LD) transmission of visible light, by optical band pass filter 20, selects the light carrier that frequency is 193.125THz, using light electric-examination
Survey device 21 and convert optical signals to electric signal；In subscriber unit 27, by the laser diode 22 of visible light wave range, signal is adjusted
Make and high-speed communication is realized on light, and utilize its directionality, operation can be controlled to the electrical equipment in smart home；Using snow
Diode 23 is collapsed, opto-electronic conversion is realized, electric signal is demodulated by demodulating receiver module 24, recover initial data.
(6) major technique advantage
Indoor mixing multi-access systems of the present invention based on frequency comb, different ripples are produced using Mach-Zehnder modulators
Frequency comb long.Through Optical Fiber Transmission, using wavelength-selective switches and optical band pass filter, different wavelength are selected, and carry out
The indoor access of three kinds of different modes.The present invention makes full use of wireless access high mobility, LED-based visible light communication
Illuminate and coupled with the depth of communication, while wireless frequency spectrum scarcity problem is made up, and the high speed of the visible light communication based on LD is passed
Defeated, accurate orientation effectively solves the deficiency of access way in single ventricle, improves flexibility and the synthesis of indoor access
Property, the practical value with novelty.
Claims (5)
1. the indoor millimeter-wave and visible light communication mixing multi-access method of frequency comb are based on, it is characterised in that described method
Comprise the following steps：
Mach-Zehnder modulators are driven to produce equidistant frequency comb using outside cavity gas laser and radio frequency source；
Different wavelength are selected using wavelength-selective switches；
Realize being wirelessly transferred using antenna；
Visible light communication and illumination are realized using LED；
The high speed data transfer and oriented control of visible light communication are realized using LD.
2. the indoor millimeter-wave and visible light communication mixing multi-access method of frequency comb are based on as claimed in claim 1, and it is special
Levy and be, the equidistant frequency comb of described generation is 25GHz, spacing frequency and RF source frequencies phase with frequency at equal intervals
Together, and there are 7 flat light carriers.
3. the indoor millimeter-wave and visible light communication mixing multi-access method of frequency comb are based on as claimed in claim 1, and it is special
Levy and be, realize being wirelessly transferred using antenna, selected between 193.05THz and 193.15THz two by wavelength-selective switches
Away from the light carrier for 100GHz, 100GHz millimeter-wave signals are produced using photoelectric detector beat frequency, and realized using antenna wireless
Signal sends and receives.
4. the indoor millimeter-wave and visible light communication mixing multi-access method of frequency comb are based on as claimed in claim 1, and it is special
Levy and be, visible light communication and illumination are realized using LED, the light carrier for leaching 193.1THz by optical band pass filter is used for
The visible light communication of LED.
5. the indoor millimeter-wave and visible light communication mixing multi-access method of frequency comb are based on as claimed in claim 1, and it is special
Levy and be, the high speed data transfer and oriented control of visible light communication are realized using LD, leached by optical band pass filter
The light carrier of 193.125THz is used for the visible light communication of LD, and carries out accurate oriented control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611092526.2A CN106712849A (en) | 2016-12-01 | 2016-12-01 | Optical frequency comb based indoor millimeter wave and visible light communication hybrid multi-access method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611092526.2A CN106712849A (en) | 2016-12-01 | 2016-12-01 | Optical frequency comb based indoor millimeter wave and visible light communication hybrid multi-access method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106712849A true CN106712849A (en) | 2017-05-24 |
Family
ID=58935404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611092526.2A Pending CN106712849A (en) | 2016-12-01 | 2016-12-01 | Optical frequency comb based indoor millimeter wave and visible light communication hybrid multi-access method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106712849A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107154574A (en) * | 2017-06-23 | 2017-09-12 | 深圳市阿集比光电科技有限公司 | Laser system and LIFI devices |
| CN108712214A (en) * | 2018-05-08 | 2018-10-26 | 浙江大学 | A kind of tunable mostly band terahertz pulse wireless communication emitter |
| CN109889269A (en) * | 2018-12-20 | 2019-06-14 | 北京邮电大学 | A kind of radiofrequency signal generation system and method |
| CN110429979A (en) * | 2019-06-21 | 2019-11-08 | 南方科技大学 | Data transmission method, device, equipment and storage medium |
| CN112383363A (en) * | 2020-10-29 | 2021-02-19 | 中国科学院半导体研究所 | Large-bandwidth phased array receiving device based on frequency mixing technology |
-
2016
- 2016-12-01 CN CN201611092526.2A patent/CN106712849A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107154574A (en) * | 2017-06-23 | 2017-09-12 | 深圳市阿集比光电科技有限公司 | Laser system and LIFI devices |
| CN108712214A (en) * | 2018-05-08 | 2018-10-26 | 浙江大学 | A kind of tunable mostly band terahertz pulse wireless communication emitter |
| CN109889269A (en) * | 2018-12-20 | 2019-06-14 | 北京邮电大学 | A kind of radiofrequency signal generation system and method |
| CN109889269B (en) * | 2018-12-20 | 2020-08-21 | 北京邮电大学 | Radio frequency signal generation system and method |
| CN110429979A (en) * | 2019-06-21 | 2019-11-08 | 南方科技大学 | Data transmission method, device, equipment and storage medium |
| CN112383363A (en) * | 2020-10-29 | 2021-02-19 | 中国科学院半导体研究所 | Large-bandwidth phased array receiving device based on frequency mixing technology |
| CN112383363B (en) * | 2020-10-29 | 2023-05-30 | 中国科学院半导体研究所 | Large bandwidth phased array receiving device based on frequency mixing technology |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106712849A (en) | Optical frequency comb based indoor millimeter wave and visible light communication hybrid multi-access method | |
| Matheus et al. | Visible light communication: concepts, applications and challenges | |
| Leba et al. | LiFi—The path to a new way of communication | |
| CN103427903A (en) | Visible light communication system based on wireless access point | |
| CN101753214B (en) | Method and device for implementation of wireless communication via LED | |
| CN101217316B (en) | An OFDM optical fiber wireless communication method and system based on phase modulator | |
| CN103117796A (en) | Relay retransmission device and relay retransmission method for satellite radio frequency and optical fiber signal transmission data | |
| CN105007121B (en) | Millimeter wave orbital angular momentum communication device and method based on light-carried wireless technology | |
| CN106100750A (en) | Use 2 × 2 MIMO fiber radio integration method and systems of light independent sideband modulation based on I/Q manipulator | |
| CN204089821U (en) | A kind of visible light communication system | |
| CN103516429B (en) | Based on W waveband broadband millimeter wave full duplex cut-in method and the system of local oscillator broadcast | |
| Sarwar et al. | Visible light communication using a solar-panel receiver | |
| CN105306140A (en) | Networking system for visible light communication and networking method thereof | |
| CN105049102A (en) | High-frequency millimeter wave integrated antenna system | |
| Wang et al. | Capacity analysis for dimmable visible light communications | |
| Turan et al. | Visible light communications in industrial internet of things (IIOT) | |
| CN101714899A (en) | Optical fiber radio communication system | |
| Pottoo et al. | IoT enabled by Li-Fi technology | |
| CN205986881U (en) | Light carries radio frequency analogue transmission signal transceiver | |
| O'Brien | Cooperation in optical wireless communications | |
| Slaiman et al. | Optical wireless communications through visible light leds: an overview | |
| CN114079514A (en) | WDM-ROF system based on optical fiber energy transmission | |
| Kumari et al. | Emerging next generation hybrid PON-VLC system: A review, applications and challenges | |
| CN112260755A (en) | Heterogeneous network communication system of coal mining working face of coal mine | |
| CN105375983A (en) | Voice communication system and communication method based on laser antenna |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170524 |