CN104601234A - High-speed weak signal obtaining circuit - Google Patents
High-speed weak signal obtaining circuit Download PDFInfo
- Publication number
- CN104601234A CN104601234A CN201410736441.8A CN201410736441A CN104601234A CN 104601234 A CN104601234 A CN 104601234A CN 201410736441 A CN201410736441 A CN 201410736441A CN 104601234 A CN104601234 A CN 104601234A
- Authority
- CN
- China
- Prior art keywords
- signal
- telecommunication
- high speed
- processing unit
- analog
- 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
Landscapes
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
The invention relates to the technology of electronic circuits and discloses a high-speed weak signal obtaining circuit. The high-speed weak signal obtaining circuit comprises N photoelectric detecting units, N amplifiers and a coupling processing unit, wherein N is a natural number and larger than or equal to 1; the photoelectric detecting unit is connected with one amplifier; the coupling processing unit is connected with all amplifiers; the photoelectric detecting units are used for converting a detected high-speed visible light signal into an electric signal and outputting the electric signal to the amplifiers; the amplifiers are used for amplifying the electric signal and outputting the amplified electric signal to the coupling processing unit; the coupling processing unit is used for combining the received electric signal and obtaining the combined signal. The high-speed weak signal obtaining circuit is used for firstly converting the detected light signal into the light signal, amplifying and combining the electric signal to obtain the combined signal, so that information carried in high-speed visible light can be accurately received and processed, interferences of light intensity declination are reduced, and the reliability of the system is improved.
Description
Technical field
The present invention relates to electronic circuit technology, particularly high speed weak signal acquisition cuicuit.
Background technology
White light LEDs (Light-Emitting Diode, light-emitting diode) has the advantages such as luminous efficiency is high, size is little, the life-span is long as a kind of solid state light emitter, and the traditional lighting apparatus of replacement is become environmental protection lighting light source of future generation.As a kind of semiconductor photonic device, the fast response characteristic of white light LEDs makes it have the feature of High Speed Modulation, signal the velocity modulation of perception cannot can be carried out transfer of data with human eye to LED light source.LED-based These characteristics, creates the new technology of a kind of degree of depth coupled illumination and transfer of data, i.e. visible optical communication technique (Visible Light Communication is called for short VLC).VLC technology as a kind of light wireless communication technology have transmitting power high, high without the need to frequency spectrum application, bandwidth, without electromagnetic interference and the advantage such as safe and reliable, can supplementing as the twireless radio-frequency communication technology of frequency spectrum growing tension.
Compare infrared radio optical communication system, the light that in VLC system, white light LEDs sends is to eye-safe, and therefore transmitting power can be very high, but the light-emitting mode due to LED follows lambert's divergent mode, from light source comparatively distant location, even if there is higher transmitting power, light intensity is still very weak.And, VLC system is designed to light intensity modulation, direct-detection system (Intensity Modulation/DirectDetection mostly, be called for short IM/DD), the power of the light signal that receiver photoelectricity testing part receives directly will determine that can whole system work normally.When the light signal that receiver photoelectricity testing part receives is very weak, will there is larger deviation in follow-up treatment circuit, can not the accurate transmission of guarantee information.
Summary of the invention
The object of the present invention is to provide a kind of high speed weak signal acquisition cuicuit, the information that high speed visible ray is carried can be received and process exactly, weakens the impact of light intensity decline, improves the reliability of system.
For solving the problems of the technologies described above, the invention provides a kind of high speed weak signal acquisition cuicuit, comprising: N number of photodetector unit, N number of amplifier and coupling processing unit;
Wherein, N is natural number, and is greater than or equal to 1;
A described photodetector unit is only connected with a described amplifier; Described coupling processing unit is all connected with all described amplifiers;
Described photodetector unit is used for converting the high speed visible light signal detected to the signal of telecommunication, and exports the described signal of telecommunication to described amplifier;
The described signal of telecommunication amplifies by described amplifier, and exports the described signal of telecommunication amplified to described coupling processing unit;
The signal of telecommunication received merges by described coupling processing unit, obtains combined signal.
Embodiment of the present invention in terms of existing technologies, comprises N number of photodetector unit, N number of amplifier and coupling processing unit, and wherein, N is natural number, and is greater than or equal to 1; A photodetector unit is only connected with an amplifier, and coupling processing unit is all connected with each amplifier, and that is, amplifier is connected correspondingly with photodetector unit, and all amplifiers are all connected with coupling processing unit.In the present invention, be utilize N number of photodetector unit to convert the high speed visible light signal detected to the N road signal of telecommunication respectively, and export this N road signal of telecommunication to corresponding amplifier respectively, wherein, the frequency of high speed visible light signal is 150MHz, and intensity is very weak.Correspondingly, the electrical signal intensity converted by light signal is also very weak.The signal of telecommunication very weak for N road intensity amplifies by N number of amplifier respectively, and exports the N road signal of telecommunication after amplifying to coupling processing unit respectively.The signal of telecommunication after the N road received is amplified by coupling processing unit merges, obtain combined signal, wherein, this combined signal is compared with the single channel signal of telecommunication directly converted by high-speed optical signal, its intensity is enough to the needs meeting subsequent process circuit, the information that high speed visible ray is carried can be received and process exactly, reduces the impact of light intensity decline, improves the reliability of system.
In addition, comparing unit and selector is also comprised; Described comparing unit gets the flip-flop of the signal of telecommunication that all amplifiers export, and after comparing, output control signal controls described selector and exports the signal of telecommunication maximum for the intensity of described flip-flop to described coupling processing unit.
Due to comparing unit the signal of telecommunication amplified through amplifier is compared after export the control signal of generation to selector, selector is when receiving control signal, the signal of telecommunication that selection intensity is maximum also exports coupling processing unit to, namely have selected the optimum signal of carry information, reduce the impact of light intensity decline further, and circuit is simple, be easy to realize.
In addition, described comparing unit comprises: integrator and comparator; Described integrator obtains the direct current signal in the signal of telecommunication of all described amplifications, carries out integration respectively to described direct current signal, and exports the mean value of the described direct current signal obtained to described comparator; The mean value of described comparator to all described direct current signal received compares, according to control signal described in the DC signal output that intensity is maximum.
Integrator obtains the direct current signal in the signal of telecommunication amplified on N road, and the mean value of the direct current signal drawn is exported to comparator after integration is carried out to each direct current signal, the mean value of comparator to all direct current signals received compares, and according to the maximum DC signal output control signal of intensity, wherein, this control signal comprises the information of the maximum signal of telecommunication of intensity.Produce the control signal being used for the maximum signal of telecommunication of selection intensity in this way, method is simple, is easy to realize.
In addition, described coupling processing unit comprises: coupler, analog to digital converter and microprocessing unit MCU; All described amplifiers are all connected with described coupler; Described coupler through described analog to digital converter and described MCU be connected; The signal of telecommunication of all described amplifications is all coupled to described analog to digital converter by described coupler; The signal of reception is converted to digital signal by described analog to digital converter, and exports described MCU to; Described MCU processes the described combined signal of rear acquisition to the signal received.In addition, described coupler is transformer; Described transformer is coupled to described analog to digital converter after being merged by the signal of telecommunication of all described amplifications.Utilize the merging that transformer realizes the signal of telecommunication and the function be coupled, the direct current signal in the signal of telecommunication can be filtered out, only retain the signal component of carry information, make signal cleaner, more reliably.
In addition, described photodiode is intrinsic photodiode PIN.Intrinsic photodiode PIN (Positive-Intrinsic-Negative, positive pole-intrinsic-negative pole) although there is no internal current gain, but within the scope of larger input optical power, have the good opto-electronic conversion linearity, and design circuit is relatively simple.
In addition, described N number of photodetector unit arrangement formation has periodic photodetector array.In addition, described amplifier and described coupling processing unit are integrated in printing board PCB.In addition, described photodiode PD is connected on printing board PCB by pad.
N number of photodetector unit is set to have periodic photodetector array, and amplifier and coupling processing unit are integrated in printing board PCB, wherein, photodiode PD is connected on PCB by pad.The high speed weak signal acquisition cuicuit volume designed in like fashion is little, meets integrated demand, has the prospect realizing large scale integration.
Accompanying drawing explanation
Fig. 1 is the structural representation of the high speed weak signal acquisition cuicuit according to first embodiment of the invention;
Fig. 2 is the structural representation of the high speed weak signal acquisition cuicuit according to second embodiment of the invention;
Fig. 3 is the structural representation of the high speed weak signal acquisition cuicuit according to third embodiment of the invention;
Fig. 4 is the structural representation of the high speed weak signal acquisition cuicuit according to four embodiment of the invention;
Fig. 5 is the structural representation of the high speed weak signal acquisition cuicuit according to fifth embodiment of the invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the embodiments of the present invention are explained in detail.But, persons of ordinary skill in the art may appreciate that in each execution mode of the present invention, proposing many ins and outs to make reader understand the application better.But, even without these ins and outs with based on the many variations of following execution mode and amendment, each claim of the application technical scheme required for protection also can be realized.
First execution mode of the present invention relates to a kind of high speed weak signal acquisition cuicuit, and concrete structure as shown in Figure 1, comprises N number of photodetector unit, N number of amplifier and coupling processing unit.
Wherein, N is natural number, and is greater than or equal to 1; Comprise at least one photodiode (Photo Diode is called for short PD) in photodetector unit, that is, only can comprise a PD, also can comprise multiple PD, can be determined on a case-by-case basis.In the present embodiment, photodiode is intrinsic photodiode PIN.Although intrinsic photodiode PIN does not have internal current gain, within the scope of larger input optical power, there is the good opto-electronic conversion linearity, make design circuit relatively simple.
As shown in Figure 1, an amplifier is only connected with a photodetector unit; Coupling processing unit is all connected with each amplifier.Specifically, photodetector unit is used for converting the high speed visible light signal detected to the signal of telecommunication, and exports this signal of telecommunication to corresponding amplifier, and wherein, high speed visible light signal carries the information of transmission.Specifically, N number of photodetector unit converts the high speed visible light signal detected to the N road signal of telecommunication respectively, and exports this N road signal of telecommunication to corresponding amplifier respectively.Wherein, high speed visible light signal is the visible ray that LED sends, and through High Speed Modulation, carries the information carrying out transmitting; But distant due between photodetector unit and LED, the light intensity of photodetector unit position is very weak, so correspondingly, the electrical signal intensity converted by light signal is also very weak.
The signal of telecommunication received amplifies by amplifier, and exports the signal of telecommunication after amplifying to coupling processing unit.That is, the signal of telecommunication very weak for N road intensity amplifies by N number of amplifier respectively, and exports the N road signal of telecommunication after amplifying to coupling processing unit respectively.
The N road signal of telecommunication received merges, to obtain combined signal by coupling processing unit.That is, the signal of telecommunication after the N road received can be amplified by coupling processing unit carries out superposing or weighting merging, obtains combined signal.Be the technology of existing maturation because Signal averaging and weighting merge, do not repeat them here.
Specifically, in the present embodiment, coupling processing unit can comprise: coupler, analog to digital converter and microprocessing unit (MCU).All amplifiers are all connected with coupler, coupler through analog to digital converter and MCU be connected; Coupler is by the coupling electrical signals that amplifies through amplifier to analog to digital converter, and wherein, the signal of telecommunication is analog signal; The signal of telecommunication of reception is converted to digital signal by analog to digital converter, and exports MCU to; MCU obtains combined signal after the digital signal of reception being processed.Wherein, this combined signal is compared with the single channel signal of telecommunication directly converted by high-speed optical signal, and its intensity is enough to the needs meeting subsequent process circuit, and the information that high speed visible ray is carried can be received and process exactly, weaken the impact of light intensity decline, improve the reliability of system.
In addition, in the present embodiment, N number of photodetector unit can arrange formation and has periodic photodetector array; Amplifier and coupling processing unit can be integrated on printing board PCB; Photodiode PD can be connected on PCB by pad.Wherein, shape, the cycle of the size of each PD, the size of photodetector array, photodetector array all can be arranged as required, are received in time and process to make information.
Owing to N number of photodetector unit to be set to there is periodic PD array, amplifier and coupling processing unit are integrated in printing board PCB, wherein, photodiode PD is connected on PCB by pad, like this, high speed weak signal acquisition cuicuit volume is little, meets integrated demand, has the prospect realizing large scale integration.
Compared with prior art, present embodiment utilizes N number of photodetector unit to convert the high speed visible light signal detected to the N road signal of telecommunication respectively, and export this N road signal of telecommunication to corresponding amplifier respectively and amplify, the signal of telecommunication that this N road is amplified processes by coupling processing unit again, obtain combined signal, this combined signal is compared with the single channel signal of telecommunication directly converted by high-speed optical signal, its intensity is enough to the needs meeting subsequent process circuit, the information that high speed visible ray is carried can be received and process exactly, reduce the impact of light intensity decline, the reliability of raising system.
Second execution mode of the present invention relates to a kind of high speed weak signal acquisition cuicuit, specifically as shown in Figure 2.Second execution mode is the further refinement of the first execution mode, gives the concrete merging mode of coupling processing unit to the N road signal of telecommunication.In second embodiment of the invention, the output of all amplifiers is connected with coupler after being directly parallel in together, and coupling processing unit processes the signal after the N road signal of telecommunication directly merges, and obtain combined signal, circuit is simple, is easy to realize.
It should be noted that, the relevant technical details mentioned in the first execution mode is still effective in the present embodiment, and the technique effect that can reach in the first embodiment can realize in the present embodiment too, in order to reduce repetition, repeats no more here.
Third embodiment of the invention relates to a kind of high speed weak signal acquisition cuicuit, specifically as shown in Figure 3.3rd execution mode is the further refinement of the first execution mode, gives the concrete merging mode of coupling processing unit to the N road signal of telecommunication.In the 3rd execution mode of the present invention, in coupling processing unit, coupler is transformer, and transformer is coupled to analog to digital converter after being merged by the signal of telecommunication of all amplifications.Be coupled to analog to digital converter after utilizing transformer to be merged by the signal of telecommunication, the direct current signal in the signal of telecommunication can be filtered out, only retain the signal component of carry information, make signal cleaner, more reliably.
It should be noted that, the relevant technical details mentioned in the first execution mode is still effective in the present embodiment, and the technique effect that can reach in the first embodiment can realize in the present embodiment too, in order to reduce repetition, repeats no more here.
Four embodiment of the invention relates to a kind of high speed weak signal acquisition cuicuit, specifically as shown in Figure 4.4th enforcement side is the further refinement of the first execution mode, gives the concrete merging mode of coupling processing unit to the N road signal of telecommunication.In the 4th execution mode of the present invention, N number of coupler, N number of analog to digital converter and a MCU is comprised in coupling processing unit, N number of amplifier is connected correspondingly with N number of coupler, N number of coupler is also connected correspondingly with N number of analog to digital converter, N number of analog to digital converter is all connected with MCU, this circuit utilizes N number of coupler that the N road signal of telecommunication is coupled respectively to N number of analog to digital converter to carry out analog-to-digital conversion, like this, effectively can suppress the noise in the signal of telecommunication of each road, improve the signal to noise ratio of combined signal, the reliability of further raising system.
Specifically, amplifier is connected correspondingly with coupler, and coupler is also connected correspondingly with analog to digital converter, and N number of analog to digital converter is all connected with MCU; Coupler by amplify coupling electrical signals to analog to digital converter; The signal of reception is converted to digital signal by analog to digital converter, and exports MCU to; MCU obtains combined signal after processing the signal received.Utilize N number of coupler respectively the N road signal of telecommunication to be coupled to N number of analog to digital converter accordingly and carry out analog-to-digital conversion, because an analog to digital converter only carries out analog-to-digital conversion to a signal of telecommunication, make it possible to effectively suppress the noise in the signal of telecommunication of each road, finally, make the signal to noise ratio that improve combined signal, further increase the reliability of system.
It should be noted that, the relevant technical details mentioned in the first execution mode is still effective in the present embodiment, and the technique effect that can reach in the first embodiment can realize in the present embodiment too, in order to reduce repetition, repeats no more here.
Fifth embodiment of the invention relates to a kind of high speed weak signal acquisition cuicuit, specifically as shown in Figure 5.5th enforcement side has done further improvement on the basis of the first execution mode, main improvements are: in the 5th execution mode of the present invention, coupling processing unit is exported to by the signal of telecommunication that selection intensity is maximum, reduce the impact of light intensity decline further, and, circuit is simple, is easy to realize.
Specifically, present embodiment also comprises comparing unit and selector, and comparing unit compares all signals of telecommunication amplified through amplifier, and the maximum signal of telecommunication of controlled selector selection intensity exports coupling processing unit to.
In the present embodiment, comparing unit one end is all connected with all amplifiers, and the other end is connected with selector; Selector is also all connected with all amplifiers, coupling processing unit; Comparing unit gets the flip-flop of the signal of telecommunication that all amplifiers export, and after comparing, exports control signal controlled selector and exports the signal of telecommunication maximum for the intensity of flip-flop to coupling processing unit.
Wherein, comparing unit comprises: integrator and comparator; All amplifiers, comparator are all connected with integrator; Integrator obtains the direct current signal in the signal of telecommunication of all amplifications, carries out integration respectively to direct current signal, and exports the mean value of the direct current signal of acquisition to comparator; The mean value of comparator to all direct current signals received compares, according to the DC signal output control signal that intensity is maximum.
Specifically, integrator obtains the direct current signal in the signal of telecommunication amplified on N road, and the mean value of the direct current signal drawn is exported to comparator after integration is carried out to each direct current signal, the mean value of comparator to all direct current signals received compares, and according to the maximum DC signal output control signal of intensity, wherein, this control signal comprises the information of the maximum signal of telecommunication of intensity.Produce the control signal being used for the maximum signal of telecommunication of selection intensity in this way, method is simple, is easy to realize.
Process because the selector signal of telecommunication that selection intensity is maximum upon the reception of control signals exports coupling processing unit to, namely have selected the optimum signal of carry information, reduce the impact of light intensity decline further, further increase the reliability of system; And circuit is simple, be easy to realize.
It should be noted that, the relevant technical details mentioned in the first execution mode is still effective in the present embodiment, and the technique effect that can reach in the first embodiment can realize in the present embodiment too, in order to reduce repetition, repeats no more here.
Persons of ordinary skill in the art may appreciate that the respective embodiments described above realize specific embodiments of the invention, and in actual applications, various change can be done to it in the form and details, and without departing from the spirit and scope of the present invention.
Claims (12)
1. a high speed weak signal acquisition cuicuit, is characterized in that, comprises: N number of photodetector unit, N number of amplifier and coupling processing unit;
Wherein, N is natural number, and is greater than or equal to 1;
A described photodetector unit is only connected with a described amplifier; Described coupling processing unit is all connected with all described amplifiers;
Described photodetector unit is used for converting the high speed visible light signal detected to the signal of telecommunication, and exports the described signal of telecommunication to described amplifier;
The described signal of telecommunication amplifies by described amplifier, and exports the described signal of telecommunication amplified to described coupling processing unit;
The signal of telecommunication received merges by described coupling processing unit, obtains combined signal.
2. high speed weak signal acquisition cuicuit according to claim 1, is characterized in that, also comprise comparing unit and selector;
Described comparing unit gets the flip-flop of the signal of telecommunication that all amplifiers export, and after comparing, output control signal controls described selector and exports the signal of telecommunication maximum for the intensity of described flip-flop to described coupling processing unit.
3. high speed weak signal acquisition cuicuit according to claim 2, it is characterized in that, described comparing unit comprises: integrator and comparator;
Described integrator obtains the direct current signal in the signal of telecommunication of all described amplifications, carries out integration respectively to described direct current signal, and exports the mean value of the described direct current signal obtained to described comparator;
The mean value of described comparator to all described direct current signal received compares, according to control signal described in the DC signal output that intensity is maximum.
4. high speed weak signal acquisition cuicuit according to claim 1, is characterized in that, described coupling processing unit comprises: coupler, analog to digital converter and microprocessing unit MCU;
All described amplifiers are all connected with described coupler; Described coupler through described analog to digital converter and described MCU be connected;
The signal of telecommunication of all described amplifications is all coupled to described analog to digital converter by described coupler; The signal of reception is converted to digital signal by described analog to digital converter, and exports described MCU to; Described MCU processes the described combined signal of rear acquisition to the signal received.
5. high speed weak signal acquisition cuicuit according to claim 4, is characterized in that, described coupler is transformer;
Described transformer is coupled to described analog to digital converter after being merged by the signal of telecommunication of all described amplifications.
6. high speed weak signal acquisition cuicuit according to claim 4, is characterized in that, the output of all described amplifiers is directly parallel in and is connected with described coupler afterwards together.
7. high speed weak signal acquisition cuicuit according to claim 4, is characterized in that, described coupling processing unit comprises: N number of coupler, N number of analog to digital converter and microprocessing unit MCU;
Described amplifier is connected correspondingly with described coupler, and described coupler is also connected correspondingly with described analog to digital converter, and described N number of analog to digital converter is all connected with described MCU;
Described coupler is by the coupling electrical signals of described amplification extremely described analog to digital converter; The signal of reception is converted to digital signal by described analog to digital converter, and exports described MCU to; Described MCU processes the described combined signal of rear acquisition to the signal received.
8. high speed weak signal acquisition cuicuit according to claim 1, is characterized in that, described photodetector unit comprises at least one photodiode PD.
9. high speed weak signal acquisition cuicuit according to claim 8, is characterized in that, described photodiode is intrinsic photodiode PIN.
10. high speed weak signal acquisition cuicuit according to claim 8, is characterized in that, described photodiode PD is connected on printing board PCB by pad.
11. high speed weak signal acquisition cuicuits according to claim 1, is characterized in that, described N number of photodetector unit arrangement formation has periodic photodetector array.
12. high speed weak signal acquisition cuicuits according to claim 1, is characterized in that, described amplifier and described coupling processing unit are integrated on printing board PCB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410736441.8A CN104601234A (en) | 2014-12-04 | 2014-12-04 | High-speed weak signal obtaining circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410736441.8A CN104601234A (en) | 2014-12-04 | 2014-12-04 | High-speed weak signal obtaining circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104601234A true CN104601234A (en) | 2015-05-06 |
Family
ID=53126781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410736441.8A Pending CN104601234A (en) | 2014-12-04 | 2014-12-04 | High-speed weak signal obtaining circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104601234A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108134633A (en) * | 2017-12-18 | 2018-06-08 | 清华大学深圳研究生院 | Light wireless communication device, data processing method and computer readable storage medium |
| CN109067465A (en) * | 2018-09-25 | 2018-12-21 | 南京中兴软件有限责任公司 | Optical network system, OLT, method for transmitting signals and readable storage medium storing program for executing |
| CN110086546A (en) * | 2019-04-12 | 2019-08-02 | 东莞信大融合创新研究院 | A kind of wide viewing angle reception system based on APD array |
| CN111342907A (en) * | 2020-03-19 | 2020-06-26 | 东南大学 | Circuit with wireless optical communication signal diversity and incident light angle estimation functions |
| CN113285763A (en) * | 2021-04-15 | 2021-08-20 | 西安理工大学 | Diversity receiving method in blue-green LED communication |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02241130A (en) * | 1989-03-14 | 1990-09-25 | Hamamatsu Photonics Kk | Space diversity in optical space transmission |
| CN1176544A (en) * | 1996-07-16 | 1998-03-18 | 日本电气株式会社 | Diversity receiver |
| CN102694604A (en) * | 2012-05-30 | 2012-09-26 | 西安电子科技大学 | Regular icosahedrons-based omni-directional optical intelligent antenna for FSO system and communication method |
| CN103475402A (en) * | 2013-07-29 | 2013-12-25 | 北京邮电大学 | Visible-light diversity-reception method and system |
| CN203492026U (en) * | 2013-10-10 | 2014-03-19 | 深圳光启创新技术有限公司 | Optical receiver and optical communication system |
| CN104011997A (en) * | 2011-12-07 | 2014-08-27 | 德克萨斯仪器股份有限公司 | Transformer power combiner with filter response |
-
2014
- 2014-12-04 CN CN201410736441.8A patent/CN104601234A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02241130A (en) * | 1989-03-14 | 1990-09-25 | Hamamatsu Photonics Kk | Space diversity in optical space transmission |
| CN1176544A (en) * | 1996-07-16 | 1998-03-18 | 日本电气株式会社 | Diversity receiver |
| CN104011997A (en) * | 2011-12-07 | 2014-08-27 | 德克萨斯仪器股份有限公司 | Transformer power combiner with filter response |
| CN102694604A (en) * | 2012-05-30 | 2012-09-26 | 西安电子科技大学 | Regular icosahedrons-based omni-directional optical intelligent antenna for FSO system and communication method |
| CN103475402A (en) * | 2013-07-29 | 2013-12-25 | 北京邮电大学 | Visible-light diversity-reception method and system |
| CN203492026U (en) * | 2013-10-10 | 2014-03-19 | 深圳光启创新技术有限公司 | Optical receiver and optical communication system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108134633A (en) * | 2017-12-18 | 2018-06-08 | 清华大学深圳研究生院 | Light wireless communication device, data processing method and computer readable storage medium |
| CN109067465A (en) * | 2018-09-25 | 2018-12-21 | 南京中兴软件有限责任公司 | Optical network system, OLT, method for transmitting signals and readable storage medium storing program for executing |
| CN110086546A (en) * | 2019-04-12 | 2019-08-02 | 东莞信大融合创新研究院 | A kind of wide viewing angle reception system based on APD array |
| CN111342907A (en) * | 2020-03-19 | 2020-06-26 | 东南大学 | Circuit with wireless optical communication signal diversity and incident light angle estimation functions |
| CN111342907B (en) * | 2020-03-19 | 2023-03-14 | 东南大学 | Circuit with wireless optical communication signal diversity and incident light angle estimation functions |
| CN113285763A (en) * | 2021-04-15 | 2021-08-20 | 西安理工大学 | Diversity receiving method in blue-green LED communication |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104485993B (en) | Vehicular visible light wireless digital voice communication system | |
| CN104601234A (en) | High-speed weak signal obtaining circuit | |
| CN103825656A (en) | Visible light communication system based on TCP/IP and method | |
| CN202168083U (en) | Photoelectric detecting receiving device with large dynamic range | |
| CN103716094B (en) | A kind of visible light communication front end circuit | |
| CN102882600A (en) | Universal serial bus (USB)-interface-based pluggable visible like wireless access system | |
| CN105827309A (en) | Indoor LED visible light communication system | |
| CN105323003A (en) | Optical communication system and optical communication method | |
| CN203554545U (en) | Handset internet-surfing device based on visible-light communication | |
| CN109756269A (en) | A kind of visible light communication reception circuit | |
| CN104821851A (en) | 2ASK preprocessing visible light communication system | |
| CN105610502A (en) | Special visible light communication based integrated circuit for receiver | |
| CN110830113B (en) | Standard CMOS fully-differential photoelectric integrated receiver for visible light communication | |
| CN206061004U (en) | Supervising device data transmission system based on Lifi technologies | |
| CN103188015A (en) | LED visible light communication system and compensator | |
| CN110113110A (en) | Underwater visible light communication device | |
| CN105471505A (en) | Signal modulation method, signal modulation device, and visible light communication system | |
| CN205693676U (en) | A kind of LED-based free-space optics access network device | |
| Zhu et al. | Visible Light Communication System Based on White LED | |
| Jia et al. | Numerical analysis on an OOK-NRZ visible light communication system based on a single white LED | |
| CN205490551U (en) | Indoor LED visible light communication system | |
| CN205430253U (en) | Low rate DC~20Mbps receives and dispatches integrative SFP optical module | |
| CN108242954A (en) | A kind of visible light communication system and method applied to data transmission in spacecraft module | |
| CN116886190A (en) | Visible light-based telescopic audio information sending method | |
| CN203554450U (en) | SFP+LRM optical module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150506 |