CN107181525A - A kind of visible light wireless communication physical layer optical frequency demodulator - Google Patents
A kind of visible light wireless communication physical layer optical frequency demodulator Download PDFInfo
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- CN107181525A CN107181525A CN201710467670.8A CN201710467670A CN107181525A CN 107181525 A CN107181525 A CN 107181525A CN 201710467670 A CN201710467670 A CN 201710467670A CN 107181525 A CN107181525 A CN 107181525A
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The present invention provides a kind of visible light wireless communication physical layer optical frequency demodulator, including：Signal conversion module；Mutual resistance amplification and signal conditioning circuit；Automatic gain control circuit；Analog to digital conversion circuit；Base band demodulator；The output end connection mutual resistance amplification of signaling conversion circuit and the input of signal conditioning circuit, the output end of mutual resistance amplification and signal conditioning circuit connects the input of automatic gain control circuit, the output end of automatic gain control circuit connects the input of analog to digital conversion circuit, the output end of analog to digital conversion circuit connects the input of base band demodulator, the output end connection automatic gain control circuit of base band demodulator.The present invention utilizes radio communication and analog circuit, realizes optical frequency signal to the hardware demodulation process of baseband digital signal so that signal can be properly received, and this makes visible light communication come true from theory.
Description
Technical field
The present invention relates to wireless light communication field, and in particular to a kind of visible light wireless communication physical layer optical frequency demodulator.
Background technology
In the society of current advanced IT application, information and communication turn into the main flow of modern society, and radio communication is communication
A more important part in field.Traditional communication is communicated using microwave, and its bandwidth gradually can not
Increasingly huge communication requirement is met, and the Radiation On Human body health produced has certain injury.So, people need one kind more
Safety, more healthy, faster communication, then, it is thought that visible light communication.And based on the wireless of visible ray
In communication system, the demodulation of signal is an indispensable part.
The content of the invention
It is an object of the invention to provide a kind of visible light wireless communication physical layer optical frequency demodulator.
The technical scheme is that：
A kind of visible light wireless communication physical layer optical frequency demodulator, including：
Visible light signal by atmospheric channel is converted into the signal conversion module of subcarrier imitating current signal；
Subcarrier imitating current signal is converted into subcarrier imitating voltage signal and mutual resistance amplification and the letter of signal condition is carried out
Number modulate circuit；
Subcarrier imitating voltage signal is converted into subcarrier imitating voltage differential signal and automatic growth control output is carried out
Automatic gain control circuit；
The subcarrier imitating voltage signal that automatic gain control circuit is exported is converted to the analog-to-digital conversion of subcarrier data signal
Circuit；
The base band demodulator of local data is demodulated into the subcarrier data signal that analog to digital conversion circuit is exported；
The output end connection mutual resistance amplification of signaling conversion circuit and the input of signal conditioning circuit, mutual resistance amplification and signal condition
The output end of circuit connects the input of automatic gain control circuit, the output end connection analog-to-digital conversion of automatic gain control circuit
The input of circuit, the output end of analog to digital conversion circuit connects the input of base band demodulator.
The signal conversion module, including：
Produce HVB high voltage bias, cause the avalanche photodide in optical-electrical converter to enter the high-voltage converter of avalanche condition；
The avalanche photodide transducing biased by high-voltage converter will be passed through by the visible light signal of atmospheric channel for electric current
Signal, it will be seen that optical frequencies carrier wave demodulation goes out the optical-electrical converter of subcarrier imitating current signal；
The output end of high-voltage converter connects the input of optical-electrical converter, the output end connection mutual resistance amplification of optical-electrical converter with
The input of signal conditioning circuit.
The mutual resistance amplification and signal conditioning circuit, including：
The subcarrier imitating current signal that optical-electrical converter is exported is converted into the transreactance amplifier of subcarrier imitating voltage signal；
The amplifier for the low noise being amplified to the subcarrier imitating voltage signal that transreactance amplifier is exported；
The target signal filter outside passband in the subcarrier imitating voltage signal that amplifier is exported and the secondary load only in reservation passband
The bandpass filter of wave simulation voltage signal；
The input of transreactance amplifier connects the output end of optical-electrical converter, and the output end of transreactance amplifier connects putting for low noise
The input of big device, the output end of the amplifier of low noise connects the input of bandpass filter, the output end of bandpass filter
Connect the input of automatic gain control circuit.
The automatic gain control circuit, including：
The subcarrier imitating voltage signal that mutual resistance amplification and signal conditioning circuit are exported is converted to subcarrier imitating voltage differential
The differential converter of signal；
The radiated noise that the high-voltage converter carried in subcarrier imitating voltage differential signal is produced is divided into two parts after filtering out
Signal is exported to the differential bandpass filter of signal strength detector, automatic gain controller respectively；
Testing result is simultaneously supplied to control by the subcarrier imitating voltage differential signal power of detection differential bandpass filter output
The signal strength detector of device firmware；
The subcarrier imitating voltage signal that amplification or attenuated differential bandpass filter VI are exported, and according to the setting of controller firmware
Ensure the automatic gain controller that the amplitude of the subcarrier imitating voltage signal of automatic gain controller output is fixed；
The signal gain of automatic gain controller is set according to the testing result of signal strength detector, makes automatic gain controller
The controller firmware that the subcarrier imitating voltage signal amplitude of output is fixed；
The input connection mutual resistance amplification of differential converter and the output end of signal conditioning circuit, the output end of differential converter connect
The input of differential bandpass filter is connect, the output end of differential bandpass filter connects the input of automatic gain controller respectively
The output end of the input at end, signal strength detector and controller firmware, signal strength detector and controller firmware is connected
The input of automatic gain controller, the output end of automatic gain controller connects the input of analog to digital conversion circuit.
Analog-digital conversion circuit as described, including：
The differential low-pass filter of aliasing produced by the subcarrier imitating voltage signal of elimination automatic gain control circuit output；
The subcarrier imitating voltage signal sampling that differential low-pass filter is exported is the analog-digital converter of subcarrier data signal；
The input of differential low-pass filter connects the output end of automatic gain control circuit, the output end of differential low-pass filter
The input of analog-digital converter is connected, the output end of analog-digital converter Ⅹ connects the input of base band demodulator.
Described visible light wireless communication physical layer optical frequency demodulator carries out visible light wireless communication physical layer optical frequency demodulation
Method, it is specific as follows：
Optical-electrical converter will pass through the avalanche photodide biased by high-voltage converter by the visible light signal of atmospheric channel
Transducing is current signal, it will be seen that optical frequencies carrier wave demodulation goes out subcarrier imitating current signal；Subcarrier current signal is by mutual
Resistance amplification after signal conditioning circuit with being converted to subcarrier imitating voltage signal, and to amplifying, filtering out the signal outside passband and only
Retain the subcarrier imitating voltage signal in passband；Subcarrier imitating voltage signal is converted into subcarrier imitating voltage differential letter
Number and filter out the radiated noise that the high-voltage converter that is carried in subcarrier imitating voltage differential signal is produced, then divide the signal into
Two parts of signals is exported to signal strength detector, automatic gain controller respectively；Signal strength detector detects subcarrier mould
Intend voltage differential signal power and testing result is supplied to controller firmware；Controller firmware is according to signal strength detector
Testing result sets the signal gain of automatic gain controller, so that the amplitude of automatic gain controller output signal is fixed；
Automatic gain controller amplifies or decay subcarrier imitating voltage signal, and ensures automatic gain according to the setting of controller firmware
The amplitude of the subcarrier imitating voltage signal of controller output is fixed；Eliminate the subcarrier imitating of automatic gain control circuit output
Aliasing produced by voltage signal；Then it is the digital signal output of subcarrier to base band solution by subcarrier imitating voltage signal sampling
Device is adjusted to be demodulated into local data, so as to complete the demodulating process of optical frequency signal.
Beneficial effect：
The present invention utilizes radio communication and analog circuit, realizes optical frequency signal to the hardware demodulation mistake of baseband digital signal
Journey so that signal can be properly received, and this makes visible light communication come true from theory.
Brief description of the drawings
Fig. 1 is the visible light wireless communication physical layer optical frequency demodulator block diagram in the specific embodiment of the invention；
Fig. 2 is the high-voltage converter circuit theory diagrams in the specific embodiment of the invention；
Fig. 3 is mutual resistance amplification and signal conditioning circuit diagram in the specific embodiment of the invention, wherein I-optical-electrical converter；
II-transreactance amplifier；The amplifier of III-low noise；IV-bandpass filter；
Fig. 4 is the automatic gain control circuit schematic diagram in the specific embodiment of the invention, wherein V-differential converter；VI-poor
Divide bandpass filter；VII-signal strength detector and controller firmware；VIII-automatic gain controller；
Fig. 5 is the analog to digital conversion circuit schematic diagram in the specific embodiment of the invention, wherein Ⅸ-differential low-pass filter；Ⅹ-mould
Number converter.
Embodiment
The embodiment to the present invention elaborates below in conjunction with the accompanying drawings.
A kind of visible light wireless communication physical layer optical frequency demodulator, as shown in figure 1, including：
Visible light signal by atmospheric channel is converted into the signal conversion module of subcarrier imitating current signal；
Subcarrier imitating current signal is converted into subcarrier imitating voltage signal and mutual resistance amplification and the letter of signal condition is carried out
Number modulate circuit；
Subcarrier imitating voltage signal is converted into subcarrier imitating voltage differential signal and automatic growth control output is carried out
Automatic gain control circuit；
The subcarrier imitating voltage signal that automatic gain control circuit is exported is converted to the analog-to-digital conversion of subcarrier data signal
Circuit；
The base band demodulator of local data is demodulated into the subcarrier data signal that analog to digital conversion circuit is exported；
The output end connection mutual resistance amplification of signaling conversion circuit and the input of signal conditioning circuit, mutual resistance amplification and signal condition
The output end of circuit connects the input of automatic gain control circuit, the output end connection analog-to-digital conversion of automatic gain control circuit
The input of circuit, the output end of analog to digital conversion circuit connects the input of base band demodulator.
The signal conversion module, including：
Produce HVB high voltage bias, cause the avalanche photodide in optical-electrical converter to enter the high-voltage converter of avalanche condition；
The avalanche photodide transducing biased by high-voltage converter will be passed through by the visible light signal of atmospheric channel for electric current
Signal, it will be seen that optical frequencies carrier wave demodulation goes out the optical-electrical converter of subcarrier imitating current signal；
The circuit of high-voltage converter snowslide biasing switch power special and related elements as shown in Fig. 2 be mainly made up of, the circuit
Produce a HVB high voltage bias signal so that the avalanche photodide in optical-electrical converter enters avalanche condition, HVB high voltage bias letter
Number by high-voltage converter BIAS interfaces export.
The output end of high-voltage converter connects the input of optical-electrical converter, and the output end connection mutual resistance of optical-electrical converter is put
Greatly with the input of signal conditioning circuit.The circuit of optical-electrical converter is as shown in Fig. 3 I.
The mutual resistance amplification and signal conditioning circuit, as shown in figure 3, including：
The subcarrier imitating current signal that optical-electrical converter is exported is converted into the transreactance amplifier of subcarrier imitating voltage signal
Ⅱ；
The amplifier III for the low noise being amplified to the subcarrier imitating voltage signal that transreactance amplifier II is exported；
The target signal filter outside passband in the subcarrier imitating voltage signal that amplifier III is exported and the pair only in reservation passband
The bandpass filter IV of carrier wave analog voltage signal；
The input of transreactance amplifier II connects the output end of optical-electrical converter I, the output end connection low noise of transreactance amplifier II
The input of the amplifier III of sound, the output end of the amplifier III of low noise connects the input of bandpass filter IV, band logical filter
The output end of ripple device IV connects the input of automatic gain control circuit.The BIAS interfaces of mutual resistance amplification and signal conditioning circuit with
BIAS interfaces connection in Fig. 2；Signal is exported through mutual resistance amplification with signal conditioning circuit by TIAF interfaces, mutual resistance amplification and signal
The TIAF interfaces of modulate circuit are connected with the TIAF interfaces in Fig. 4.
The automatic gain control circuit, as shown in figure 4, including：
The subcarrier imitating voltage signal that mutual resistance amplification and signal conditioning circuit are exported is converted to subcarrier imitating voltage differential
The differential converter V of signal；
The radiated noise that the high-voltage converter carried in subcarrier imitating voltage differential signal is produced is divided into two parts after filtering out
Signal is exported to the differential bandpass filter VI of signal strength detector, automatic gain controller respectively；
Testing result is simultaneously supplied to control by the subcarrier imitating voltage differential signal power of detection differential bandpass filter output
The signal strength detector of device firmware；
The subcarrier imitating voltage signal that amplification or attenuated differential bandpass filter VI are exported, and according to the setting of controller firmware
Ensure the automatic gain controller that the amplitude of the subcarrier imitating voltage signal of automatic gain controller output is fixed；
The signal gain of automatic gain controller is set according to the testing result of signal strength detector, makes automatic gain controller
The controller firmware that the subcarrier imitating voltage signal amplitude of output is fixed；
VII is signal strength detector and controller firmware, input connection mutual resistance amplification and the letter of differential converter V in Fig. 4
The output end of number modulate circuit, the output end of differential converter V connects the input of differential bandpass filter VI, difference band logical
The output end of wave filter VI connects the input, signal strength detector and controller firmware of automatic gain controller VIII respectively
The output end of input, signal strength detector and controller firmware connects the input of automatic gain controller VIII, automatic to increase
The output end of beneficial controller VIII connects the input of analog to digital conversion circuit.TIAF interfaces and Fig. 3 in automatic gain control circuit
The connection of TIAF interfaces, signal exports after automatic gain control circuit by two interfaces 11 and 10,11 interfaces of the module
It is connected with the interface of the C20 left ends in Fig. 5,10 interfaces are connected with the interface of the C21 left ends in Fig. 5.
Analog-digital conversion circuit as described, as shown in figure 5, including：
The differential low-pass filter of aliasing produced by the subcarrier imitating voltage signal of elimination automatic gain control circuit output
Ⅸ；
The subcarrier imitating voltage signal sampling that differential low-pass filter is exported is the analog-digital converter of subcarrier data signal
Ⅹ；
The input of differential low-pass filter Ⅸ connects the output end of automatic gain control circuit, differential low-pass filter Ⅸ it is defeated
Go out the input of end connection analog-digital converter Ⅹ, the output end of analog-digital converter Ⅹ connects the input of base band demodulator.Modulus
11 interfaces connection in the interface and Fig. 4 of C20 left ends in change-over circuit, C21 interfaces are connected with 10 interfaces in Fig. 4.Signal
Come in by the input of the two interfaces, baseband digital signal is converted into analog to digital conversion circuit.
Visible light wireless communication physical layer optical frequency solution is carried out using above-mentioned visible light wireless communication physical layer optical frequency demodulator
The method of tune is as follows：
Optical-electrical converter will pass through the avalanche photodide biased by high-voltage converter by the visible light signal of atmospheric channel
Transducing is current signal, it will be seen that optical frequencies carrier wave demodulation goes out subcarrier imitating current signal；Subcarrier current signal is by mutual
Resistance amplification after signal conditioning circuit with being converted to subcarrier imitating voltage signal, and to amplifying, filtering out the signal outside passband and only
Retain the subcarrier imitating voltage signal in passband；Subcarrier imitating voltage signal is converted into subcarrier imitating voltage differential letter
Number and filter out the radiated noise that the high-voltage converter that is carried in subcarrier imitating voltage differential signal is produced, then divide the signal into
Two parts of signals is exported to signal strength detector, automatic gain controller respectively；Signal strength detector detects subcarrier mould
Intend voltage differential signal power and testing result is supplied to controller firmware；Controller firmware is according to signal strength detector
Testing result sets the signal gain of automatic gain controller, so that the amplitude of automatic gain controller output signal is fixed；
Automatic gain controller amplifies or decay subcarrier imitating voltage signal, and ensures automatic gain according to the setting of controller firmware
The amplitude of the subcarrier imitating voltage signal of controller output is fixed；Eliminate the subcarrier imitating of automatic gain control circuit output
Aliasing produced by voltage signal；Then it is the digital signal output of subcarrier to base band solution by subcarrier imitating voltage signal sampling
Device is adjusted to be demodulated into local data, so as to complete the demodulating process of optical frequency signal.
Claims (6)
1. a kind of visible light wireless communication physical layer optical frequency demodulator, it is characterised in that including：
Visible light signal by atmospheric channel is converted into the signal conversion module of subcarrier imitating current signal；
Subcarrier imitating current signal is converted into subcarrier imitating voltage signal and mutual resistance amplification and the letter of signal condition is carried out
Number modulate circuit；
Subcarrier imitating voltage signal is converted into subcarrier imitating voltage differential signal and automatic growth control output is carried out
Automatic gain control circuit；
The subcarrier imitating voltage signal that automatic gain control circuit is exported is converted to the analog-to-digital conversion of subcarrier data signal
Circuit；
The base band demodulator of local data is demodulated into the subcarrier data signal that analog to digital conversion circuit is exported；
The output end connection mutual resistance amplification of signaling conversion circuit and the input of signal conditioning circuit, mutual resistance amplification and signal condition
The output end of circuit connects the input of automatic gain control circuit, the output end connection analog-to-digital conversion of automatic gain control circuit
The input of circuit, the output end of analog to digital conversion circuit connects the input of base band demodulator.
2. visible light wireless communication physical layer optical frequency demodulator according to claim 1, it is characterised in that the signal turns
Block is changed the mold, including：
Produce HVB high voltage bias, cause the avalanche photodide in optical-electrical converter to enter the high-voltage converter of avalanche condition；
The avalanche photodide transducing biased by high-voltage converter will be passed through by the visible light signal of atmospheric channel for electric current
Signal, it will be seen that optical frequencies carrier wave demodulation goes out the optical-electrical converter of subcarrier imitating current signal；
The output end of high-voltage converter connects the input of optical-electrical converter, the output end connection mutual resistance amplification of optical-electrical converter with
The input of signal conditioning circuit.
3. visible light wireless communication physical layer optical frequency demodulator according to claim 1, it is characterised in that the mutual resistance is put
Greatly and signal conditioning circuit, including：
The subcarrier imitating current signal that optical-electrical converter is exported is converted into the transreactance amplifier of subcarrier imitating voltage signal；
The amplifier for the low noise being amplified to the subcarrier imitating voltage signal that transreactance amplifier is exported；
The target signal filter outside passband in the subcarrier imitating voltage signal that amplifier is exported and the secondary load only in reservation passband
The bandpass filter of wave simulation voltage signal；
The input of transreactance amplifier connects the output end of optical-electrical converter, and the output end of transreactance amplifier connects putting for low noise
The input of big device, the output end of the amplifier of low noise connects the input of bandpass filter, the output end of bandpass filter
Connect the input of automatic gain control circuit.
4. visible light wireless communication physical layer optical frequency demodulator according to claim 1, it is characterised in that the automatic increasing
Benefit control circuit, including：
The subcarrier imitating voltage signal that mutual resistance amplification and signal conditioning circuit are exported is converted to subcarrier imitating voltage differential
The differential converter of signal；
The radiated noise that the high-voltage converter carried in subcarrier imitating voltage differential signal is produced is divided into two parts after filtering out
Signal is exported to the differential bandpass filter of signal strength detector, automatic gain controller respectively；
Testing result is simultaneously supplied to control by the subcarrier imitating voltage differential signal power of detection differential bandpass filter output
The signal strength detector of device firmware；
The subcarrier imitating voltage signal that amplification or attenuated differential bandpass filter VI are exported, and according to the setting of controller firmware
Ensure the automatic gain controller that the amplitude of the subcarrier imitating voltage signal of automatic gain controller output is fixed；
The signal gain of automatic gain controller is set according to the testing result of signal strength detector, makes automatic gain controller
The controller firmware that the subcarrier imitating voltage signal amplitude of output is fixed；
The input connection mutual resistance amplification of differential converter and the output end of signal conditioning circuit, the output end of differential converter connect
The input of differential bandpass filter is connect, the output end of differential bandpass filter connects the input of automatic gain controller respectively
The output end of the input at end, signal strength detector and controller firmware, signal strength detector and controller firmware is connected
The input of automatic gain controller, the output end of automatic gain controller connects the input of analog to digital conversion circuit.
5. visible light wireless communication physical layer optical frequency demodulator according to claim 1, it is characterised in that the modulus turns
Circuit is changed, including：
The differential low-pass filter of aliasing produced by the subcarrier imitating voltage signal of elimination automatic gain control circuit output；
The subcarrier imitating voltage signal sampling that differential low-pass filter is exported is the analog-digital converter of subcarrier data signal；
The input of differential low-pass filter connects the output end of automatic gain control circuit, the output end of differential low-pass filter
The input of analog-digital converter is connected, the output end of analog-digital converter Ⅹ connects the input of base band demodulator.
6. the visible light wireless communication physical layer optical frequency demodulator described in claim 1 carries out visible light wireless communication physical layer light
The method of frequency demodulation, it is characterised in that specific as follows：
Optical-electrical converter will pass through the avalanche photodide biased by high-voltage converter by the visible light signal of atmospheric channel
Transducing is current signal, it will be seen that optical frequencies carrier wave demodulation goes out subcarrier imitating current signal；Subcarrier current signal is by mutual
Resistance amplification after signal conditioning circuit with being converted to subcarrier imitating voltage signal, and to amplifying, filtering out the signal outside passband and only
Retain the subcarrier imitating voltage signal in passband；Subcarrier imitating voltage signal is converted into subcarrier imitating voltage differential letter
Number and filter out the radiated noise that the high-voltage converter that is carried in subcarrier imitating voltage differential signal is produced, then divide the signal into
Two parts of signals is exported to signal strength detector, automatic gain controller respectively；Signal strength detector detects subcarrier mould
Intend voltage differential signal power and testing result is supplied to controller firmware；Controller firmware is according to signal strength detector
Testing result sets the signal gain of automatic gain controller, so that the amplitude of automatic gain controller output signal is fixed；
Automatic gain controller amplifies or decay subcarrier imitating voltage signal, and ensures automatic gain according to the setting of controller firmware
The amplitude of the subcarrier imitating voltage signal of controller output is fixed；Eliminate the subcarrier imitating of automatic gain control circuit output
Aliasing produced by voltage signal；Then it is the digital signal output of subcarrier to base band solution by subcarrier imitating voltage signal sampling
Device is adjusted to be demodulated into local data, so as to complete the demodulating process of optical frequency signal.
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|---|---|---|---|
| CN201710467670.8A CN107181525B (en) | 2017-06-20 | 2017-06-20 | Visible light wireless communication physical layer optical frequency demodulator |
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| CN201710467670.8A CN107181525B (en) | 2017-06-20 | 2017-06-20 | Visible light wireless communication physical layer optical frequency demodulator |
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| US20100209118A1 (en) * | 2009-02-19 | 2010-08-19 | Kouichi Takene | Apparatus for transmitting and receiving a signal in a visible light communication system |
| JP2010239350A (en) * | 2009-03-31 | 2010-10-21 | Comtech 2000:Kk | Visible light communication system, and transmitter and receiver of the same |
| JP2012049901A (en) * | 2010-08-27 | 2012-03-08 | Outstanding Technology:Kk | Transmitter and receiver for visible light communication |
| CN103716094A (en) * | 2014-01-06 | 2014-04-09 | 中国人民解放军信息工程大学 | Visible light communication front end circuit |
| CN104639249A (en) * | 2013-11-12 | 2015-05-20 | 西安中科麦特电子技术设备有限公司 | Optical wireless communication receiving system |
| CN105281834A (en) * | 2014-06-19 | 2016-01-27 | 瑞萨电子株式会社 | Optical receiver |
| CN206977429U (en) * | 2017-06-20 | 2018-02-06 | 东北大学 | It can be seen that light wireless communication physical layer optical frequency demodulator |
-
2017
- 2017-06-20 CN CN201710467670.8A patent/CN107181525B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100209118A1 (en) * | 2009-02-19 | 2010-08-19 | Kouichi Takene | Apparatus for transmitting and receiving a signal in a visible light communication system |
| JP2010239350A (en) * | 2009-03-31 | 2010-10-21 | Comtech 2000:Kk | Visible light communication system, and transmitter and receiver of the same |
| JP2012049901A (en) * | 2010-08-27 | 2012-03-08 | Outstanding Technology:Kk | Transmitter and receiver for visible light communication |
| CN104639249A (en) * | 2013-11-12 | 2015-05-20 | 西安中科麦特电子技术设备有限公司 | Optical wireless communication receiving system |
| CN103716094A (en) * | 2014-01-06 | 2014-04-09 | 中国人民解放军信息工程大学 | Visible light communication front end circuit |
| CN105281834A (en) * | 2014-06-19 | 2016-01-27 | 瑞萨电子株式会社 | Optical receiver |
| CN206977429U (en) * | 2017-06-20 | 2018-02-06 | 东北大学 | It can be seen that light wireless communication physical layer optical frequency demodulator |
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| Publication number | Publication date |
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| CN107181525B (en) | 2023-07-14 |
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