CN108566246A - One kind being based on LED light source indoor communication system - Google Patents
One kind being based on LED light source indoor communication system Download PDFInfo
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- CN108566246A CN108566246A CN201810252304.5A CN201810252304A CN108566246A CN 108566246 A CN108566246 A CN 108566246A CN 201810252304 A CN201810252304 A CN 201810252304A CN 108566246 A CN108566246 A CN 108566246A
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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
- 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
- H04B10/54—Intensity modulation
- H04B10/541—Digital intensity or amplitude modulation
-
- 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
- H04B10/60—Receivers
- H04B10/61—Coherent receivers
- H04B10/612—Coherent receivers for optical signals modulated with a format different from binary or higher-order PSK [X-PSK], e.g. QAM, DPSK, FSK, MSK, ASK
-
- 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
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
- H04B10/69—Electrical arrangements in the receiver
- H04B10/691—Arrangements for optimizing the photodetector in the receiver
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
Abstract
It is disclosed by the invention to belong to optical communication system technical field,It is specially a kind of to be based on LED light source indoor communication system,Including signal generating source,The output end of the signal generating source is electrically connected the input terminal of main control chip,The output end of the main control chip is electrically connected the input terminal of serial communication modular,The output end of the serial communication modular is electrically connected the input terminal of signal modulation module,The output end of the signal modulation module is electrically connected the input terminal of LED drive circuit,The output end of the LED drive module is electrically connected the input terminal of LED light,The output end of the LED light is electrically connected the input terminal of concentrator,The output end of the concentrator is electrically connected the input terminal of filter,The output end of the filter is electrically connected the input terminal of photoelectric detector,The stability and high efficiency for realizing optical communication system quickly transmits,And realize the long distance transmission of system,It can realize the optimum reception to light modulating signal,Service life is long,It is of low cost.
Description
Technical field
The present invention relates to optical communication system technical fields, specially a kind of to be based on LED light source indoor communication system.
Background technology
Visible light can be given off when electronics and hole-recombination, thus can be used for that light emitting diode is made.In circuit and
Indicator light, or composition word or number display are used as in instrument.Gallium arsenide diode glows, gallium phosphide diode greening
Light, silicon carbide diode Yellow light-emitting low temperature, gallium nitride diode blue light-emitting.Because chemical property is divided into Organic Light Emitting Diode OLED and nothing
Machine Light-emitting diode LED.Light wireless communication technique is a kind of wireless access wide band technology, is that optic communication and wireless telecommunications are combined
Product, it using optical signal as carrier, using air as transmission medium into traveling optical signal transmit.It is high that high broadband can be realized with a low cost
The wireless communication of rate accesses, and has good spatial reuse, is greatly expanded the covering surface of network.Existing visible light
Communication system cost is excessively high, and service life is low, and cannot achieve the optimum reception of light modulating signal, and data transmission efficiency is relatively low,
For this purpose, it is proposed that a kind of being based on LED light source indoor communication system.
Invention content
The purpose of the present invention is to provide one kind being based on LED light source indoor communication system, to solve in above-mentioned background technology
The existing visible light communication system cost proposed is excessively high, and service life is low, and cannot achieve the optimum reception of light modulating signal,
The relatively low problem of data transmission efficiency.
To achieve the above object, the present invention provides the following technical solutions：One kind being based on LED light source indoor communication system, packet
Include signal generating source, the output end of the signal generating source is electrically connected the input terminal of main control chip, the main control chip it is defeated
Outlet is electrically connected the input terminal of serial communication modular, and the output end of the serial communication modular is electrically connected signal modulation module
Input terminal, the output end of the signal modulation module is electrically connected the input terminal of LED drive circuit, the LED drive module
Output end be electrically connected the input terminal of LED light, the output end of the LED light is electrically connected the input terminal of concentrator, the collection
The output end of middle device is electrically connected the input terminal of filter, and the output end of the filter is electrically connected the input of photoelectric detector
End, the output end of the photoelectric detector are electrically connected the input terminal of signal amplification module, the output of the signal amplification module
End is electrically connected the input terminal of full-wave rectification block, and the output end of the full-wave rectification block is electrically connected signal demodulation module
Input terminal, the output end of the signal demodulation module are electrically connected the input terminal of display module；
The signal generating source generates signal source and is transmitted to the main control chip, and the main control chip receives signal source and passes through
The serial communication modular is transmitted to the signal modulation module, and received signal information is carried out arteries and veins by the signal modulation module
Position modulation is rushed, is then transmit to the LED drive circuit, and the LED light is driven by the LED drive circuit, it is described
LED light carries out signal transmission to the concentrator, and the concentrator carries out the concentration of signal, and transmits a signal to the filtering
Device, the filter carry out the filtering of signal, then signal transmission to the photoelectric detector, and the photoelectric detector is process
The optical signal that collection neutralizes filtering is converted into electric signal and is transmitted to the signal amplification module, and the signal amplification module carries out letter
Number amplification, amplified signal transmission to the full-wave rectification block is then subjected to rectification, and is transmitted to the signal solution
Mode transfer block, the signal demodulation module demodulate the electric signal detected, are shown finally by the display module.
Preferably, the photoelectric detector is one kind in avalanche photodide or pin photodiodes.
Preferably, the main control chip be STM32F103RBT6, the main control chip include reset circuit, crystal oscillating circuit,
Serial port circuit and key circuit.
Preferably, the signal modulation module includes data reception module, and the output end of the data reception module is electrical
The input terminal of QAM modulation module is connected, the output end of the QAM modulation module is electrically connected the input terminal of IFFT modules, described
The output end of IFFT modules is electrically connected the input terminal of data outputting module, the electrical D/A of output end of the data outputting module
The input terminal of conversion module；
The data reception module receives the serial communication modular and is sent to signal, and is transmitted to the QAM modulation mould
Block realizes that the IFFT modules carry out IFFT transformation to signal, defeated by the data to signal QAM mappings, zero-adding and conjugation
Go out module and export signal to the D/A conversion modules to convert digital signals into analog signal.
Preferably, the signal demodulation module includes A/D conversion modules, and the output end of the A/D conversion modules electrically connects
The input terminal of synchronization module is connect, the output end of the synchronization module is electrically connected the input terminal of FFT module, the output of the FFT
End is electrically connected the input terminal of QAM demodulation modules, and the output end of the QAM demodulation modules is electrically connected the defeated of data transmission blocks
Enter end；
The A/D conversion modules convert the signal into digital signal, then carry out the same of signal by the synchronization module
The transmission of step, the FFT module carry out Fast Fourier Transform, and the QAM demodulation modules carry out QAM demodulation, and by described
Data transmission blocks transmit a signal to the display module.
Compared with prior art, the beneficial effects of the invention are as follows：One kind that the invention proposes is based on LED light source indoor communications
System, the stability and high efficiency for realizing optical communication system quickly transmit, and realize the long distance transmission of system, can realize pair
The optimum reception of light modulating signal, service life is long, of low cost.
Description of the drawings
Fig. 1 is principle of the invention block diagram.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, the present invention provides a kind of technical solution：One kind being based on LED light source indoor communication system, including signal
Occurring source, the output end of the signal generating source are electrically connected the input terminal of main control chip, the output end electricity of the main control chip
Property connection serial communication modular input terminal, the output end of the serial communication modular is electrically connected the input of signal modulation module
End, the output end of the signal modulation module are electrically connected the input terminal of LED drive circuit, the output of the LED drive module
End is electrically connected the input terminal of LED light, and the output end of the LED light is electrically connected the input terminal of concentrator, the concentrator
Output end is electrically connected the input terminal of filter, and the output end of the filter is electrically connected the input terminal of photoelectric detector, institute
The output end for stating photoelectric detector is electrically connected the input terminal of signal amplification module, and the output end of the signal amplification module is electrical
The input terminal of full-wave rectification block is connected, the output end of the full-wave rectification block is electrically connected the input of signal demodulation module
End, the output end of the signal demodulation module are electrically connected the input terminal of display module；
The signal generating source generates signal source and is transmitted to the main control chip, and the main control chip receives signal source and passes through
The serial communication modular is transmitted to the signal modulation module, and received signal information is carried out arteries and veins by the signal modulation module
Position modulation is rushed, is then transmit to the LED drive circuit, and the LED light is driven by the LED drive circuit, it is described
LED light carries out signal transmission to the concentrator, and the concentrator carries out the concentration of signal, and transmits a signal to the filtering
Device, the filter carry out the filtering of signal, then signal transmission to the photoelectric detector, and the photoelectric detector is process
The optical signal that collection neutralizes filtering is converted into electric signal and is transmitted to the signal amplification module, and the signal amplification module carries out letter
Number amplification, amplified signal transmission to the full-wave rectification block is then subjected to rectification, and is transmitted to the signal solution
Mode transfer block, the signal demodulation module demodulate the electric signal detected, are shown finally by the display module.
Wherein, the photoelectric detector is one kind in avalanche photodide or pin photodiodes, the master control core
Piece is STM32F103RBT6, and the main control chip includes reset circuit, crystal oscillating circuit, serial port circuit and key circuit, the letter
Number modulation module includes data reception module, and the output end of the data reception module is electrically connected the input of QAM modulation module
End, the output end of the QAM modulation module are electrically connected the input terminal of IFFT modules, and the output end of the IFFT modules electrically connects
Connect the input terminal of data outputting module, the input terminal of the electrical D/A conversion modules of output end of the data outputting module；The number
The serial communication modular is received according to receiving module and is sent to signal, and is transmitted to the QAM modulation module and is realized to signal QAM
Mapping, zero-adding and conjugation, the IFFT modules carry out IFFT transformation to signal, are exported signal by the data outputting module
Analog signal is converted digital signals into the D/A conversion modules, the signal demodulation module includes A/D conversion modules, institute
The output end for stating A/D conversion modules is electrically connected the input terminal of synchronization module, and the output end of the synchronization module is electrically connected FFT
The input terminal of module, the output end of the FFT are electrically connected the input terminal of QAM demodulation modules, the output of the QAM demodulation modules
End is electrically connected the input terminal of data transmission blocks；The A/D conversion modules convert the signal into digital signal, then pass through institute
The transmission that synchronization module carries out the synchronization of signal is stated, the FFT module carries out Fast Fourier Transform, the QAM demodulation modules
QAM demodulation is carried out, and the display module is transmitted a signal to by the data transmission blocks.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (5)
1. one kind being based on LED light source indoor communication system, including signal generating source, it is characterised in that：The signal generating source
Output end is electrically connected the input terminal of main control chip, and the output end of the main control chip is electrically connected the input of serial communication modular
End, the output end of the serial communication modular are electrically connected the input terminal of signal modulation module, the signal modulation module it is defeated
Outlet is electrically connected the input terminal of LED drive circuit, and the output end of the LED drive module is electrically connected the input terminal of LED light,
The output end of the LED light is electrically connected the input terminal of concentrator, and the output end of the concentrator is electrically connected the defeated of filter
Enter end, the output end of the filter is electrically connected the input terminal of photoelectric detector, and the output end of the photoelectric detector is electrical
The input terminal of connection signal amplification module, the output end of the signal amplification module are electrically connected the input of full-wave rectification block
End, the output end of the full-wave rectification block are electrically connected the input terminal of signal demodulation module, the signal demodulation module it is defeated
Outlet is electrically connected the input terminal of display module；
The signal generating source generates signal source and is transmitted to the main control chip, and the main control chip receives signal source described in
Serial communication modular is transmitted to the signal modulation module, and received signal information is carried out pulse position by the signal modulation module
Modulation is set, is then transmit to the LED drive circuit, and the LED light, the LED light are driven by the LED drive circuit
Signal transmission is carried out to the concentrator, the concentrator carries out the concentration of signal, and transmits a signal to the filter, institute
The filtering that filter carries out signal is stated, then signal transmission to the photoelectric detector, the photoelectric detector is by concentrating
It is converted into electric signal with the optical signal of filtering and is transmitted to the signal amplification module, the signal amplification module carries out signal
Then amplified signal transmission to the full-wave rectification block is carried out rectification, and is transmitted to the signal solution mode transfer by amplification
Block, the signal demodulation module demodulate the electric signal detected, are shown finally by the display module.
2. according to claim 1 a kind of based on LED light source indoor communication system, it is characterised in that：The Photoelectric Detection
Device is one kind in avalanche photodide or pin photodiodes.
3. according to claim 1 a kind of based on LED light source indoor communication system, it is characterised in that：The main control chip
For STM32F103RBT6, the main control chip includes reset circuit, crystal oscillating circuit, serial port circuit and key circuit.
4. according to claim 1 a kind of based on LED light source indoor communication system, it is characterised in that：The signal modulation
Module includes data reception module, and the output end of the data reception module is electrically connected the input terminal of QAM modulation module, described
The output end of QAM modulation module is electrically connected the input terminal of IFFT modules, and the output end of the IFFT modules is electrically connected data
The input terminal of output module, the input terminal of the electrical D/A conversion modules of output end of the data outputting module；
The data reception module receives the serial communication modular and is sent to signal, and it is real to be transmitted to the QAM modulation module
IFFT transformation now is carried out to signal to signal QAM mappings, zero-adding and conjugation, the IFFT modules, mould is exported by the data
Signal is exported to the D/A conversion modules and converts digital signals into analog signal by block.
5. according to claim 1 a kind of based on LED light source indoor communication system, it is characterised in that：The signal demodulation
Module includes A/D conversion modules, and the output end of the A/D conversion modules is electrically connected the input terminal of synchronization module, the synchronization
The output end of module is electrically connected the input terminal of FFT module, and the output end of the FFT is electrically connected the input of QAM demodulation modules
End, the output end of the QAM demodulation modules are electrically connected the input terminal of data transmission blocks；
The A/D conversion modules convert the signal into digital signal, and the synchronization of signal is then carried out by the synchronization module
Transmission, the FFT module carry out Fast Fourier Transform, and the QAM demodulation modules carry out QAM demodulation, and pass through the data
Sending module transmits a signal to the display module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810252304.5A CN108566246A (en) | 2018-03-26 | 2018-03-26 | One kind being based on LED light source indoor communication system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810252304.5A CN108566246A (en) | 2018-03-26 | 2018-03-26 | One kind being based on LED light source indoor communication system |
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| CN108566246A true CN108566246A (en) | 2018-09-21 |
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| CN201810252304.5A Pending CN108566246A (en) | 2018-03-26 | 2018-03-26 | One kind being based on LED light source indoor communication system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112104420A (en) * | 2020-09-21 | 2020-12-18 | 北京基准线科技有限公司 | Remote visible light source information ferrying equipment |
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| US20130141554A1 (en) * | 2011-07-26 | 2013-06-06 | Aaron Ganick | Independent beacon based light position system |
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Cited By (1)
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Application publication date: 20180921 |
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