CN105827316A - Visible light communications method and apparatus for suppressing inter-lamp interference - Google Patents
Visible light communications method and apparatus for suppressing inter-lamp interference Download PDFInfo
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- CN105827316A CN105827316A CN201610350072.8A CN201610350072A CN105827316A CN 105827316 A CN105827316 A CN 105827316A CN 201610350072 A CN201610350072 A CN 201610350072A CN 105827316 A CN105827316 A CN 105827316A
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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
Abstract
The present invention discloses a visible light communications method and apparatus for suppressing inter-lamp interference. The method includes the following steps of dividing multiple LED lamps into groups so as to obtain multiple LED lamp groups; dividing transmission time into multiple timeslots; performing frame combination on an encoded bit by using each LED lamp of the multiple LED lamps so as to obtain a to-be-transmitted signal; and synchronously transmitting the to-be-transmitted signal in a transmission signal timeslot of a corresponding LED lamp group by using each LED lamp, so as to convert the to-be-transmitted signal into a current signal, then controlling the brightness of each LED lamp according to the current signal, and modulating the brightness to a visible light domain so as to perform transmission. Through adoption of the method, problems that a receiver fails to distinguish multiple light source signals effectively and inter-lamp interference leads to failure of signal demodulation in the multi-lamp irradiation environment are solved. The method has the characteristics of being easy to implement, having low cost and obvious effect, and so on.
Description
Technical field
The present invention relates to communication technical field, suppress the visible light communication method and device of interference between lamp particularly to a kind of.
Background technology
Visible light communication technology is a kind of light Emerging wireless communications technology as information carrier using visible light wave range grown up based on light emitting diode (LED) lighting engineering.Compared with traditional wireless communication technology, it is seen that optical communication technique has the features such as electromagnetic-radiation-free, confidentiality, bandwidth is high, it is high to launch power, good confidentiality, and therefore visible light communication technology has vast potential for future development at wireless communication field.
Location-based service is service commonly used in people's daily life, and along with the progress of technology, people are more and more higher to the requirement of positioning precision.Meanwhile, people have the time of more than 80% in indoor activity, and the traffic of more than 70% is from indoor, it is desirable to have meets hi-Fix demand and inexpensively facilitates, it is easy to the technology of popularization.Owing to indoor environment is more complicated, traditional satellite navigation location can not meet the demand of indoor positioning, and other current business level are applied because of the reason such as Consumer's Experience and cost, do not become the effective solution of indoor positioning.
Indoor positioning technologies based on visible light communication has been sent to higher expectation, the extensive application of LED illumination so that the popularization of this technology has possessed condition.LED can simultaneously work as illuminating and the effect communicated, and reduces the cost of this technology to a certain extent.
When using LED as visible light communication transmitter when, receive terminal and PIN photodetector or snowslide pipe photodetector typically can be used to receive optical signal, and detect light signal strength, be converted to the signal of telecommunication.But, when receiving the signal that multiple LED sends by this method, multiple signals can interfere with each other, thus produce error code.The most with low cost, effect suppresses many lamps to disturb significantly, it is achieved the transmission of LED group network is the problem needing solution badly.
Summary of the invention
It is contemplated that one of technical problem solved the most to a certain extent in correlation technique.
To this end, it is an object of the present invention to propose a kind of visible light communication method suppressing and disturbing between lamp, the method can suppress many lamps to disturb effectively, simple and convenient.
Further object is that and propose a kind of visible light communication device suppressing and disturbing between lamp.
For reaching above-mentioned purpose, one aspect of the present invention embodiment proposes a kind of visible light communication method suppressing and disturbing between lamp, comprises the following steps: multiple LED be grouped, to obtain organizing LED group more, wherein, during in multiple LED, each LED is divided into described many group LED groups at most one group；The transmission time is divided into multiple time slot, and to ensure often to organize LED only at least one time slot transmission signal in the plurality of time slot in described many group LED, and in any one time slot, only one group LED sends signal；Signal to be transmitted is obtained after the bit after coding being carried out framing by LED each in the plurality of LED；Described signal to be transmitted is launched in corresponding LED group correspondence transmission signal slot inter-sync by described each LED, so that described signal to be transmitted is converted to current signal, and then according to the brightness of the described current signal described each LED of control, modulation is transmitted to visible domain.
The visible light communication method of interference between the suppression lamp of the embodiment of the present invention, by multiple LED are grouped, and the transmission time is divided into multiple time slot, thus launch described signal to be transmitted in each LED in corresponding LED group correspondence transmission signal slot inter-sync, realize the transmission of LED group network, many lamps are effectively suppressed to disturb, solving under many light irradiations environment, multiple light courcess signal cannot effectively be differentiated by receiver, between lamp, cause cannot correct demodulated signal problem in interference, there is enforcement easily, with low cost, the features such as effect is obvious, simple easily realization.
It addition, the visible light communication method of interference can also have a following additional technical characteristic between suppression lamp according to the above embodiment of the present invention:
Further, in one embodiment of the invention, the plurality of LED linearly arranges, and adjacent LED lamp belongs to different LED group.
Further, in one embodiment of the invention, the rectangular arrangement of the plurality of LED, laterally adjacent LED belongs to different LED group, and longitudinally adjacent LED belongs to different LED group.
Further, in one embodiment of the invention, the plurality of LED is radiation arrangement, and width belongs to different LED group to adjacent LED lamp, and radially adjoining LED belongs to different LED group.
Further, in one embodiment of the invention, according to the power frequency component of supply and AC electricity, the described transmission time is divided into the plurality of time slot.
Further, in one embodiment of the invention, when in by the plurality of LED, each LED obtains signal to be transmitted after the bit after coding is carried out framing, modulator approach is one or more in OOK, PAM, QAM, FSK, PSK, OFDM, ACO-OFDM, PAM-DMT, HACO-OFDM.
Further, in one embodiment of the invention, the plurality of LED can be synchronized by the power frequency component of supply and AC electricity.
Further, in one embodiment of the invention, LED is not transmitted in signal, and described non-transmitting signal slot in non-transmitting signal slot, and the average current of described each LED is equal to the average current of corresponding LED transmission signal slot.
For reaching above-mentioned purpose, another aspect of the present invention embodiment proposes a kind of visible light communication device suppressing and disturbing between lamp, including: LED grouping module, for multiple LED are grouped, to obtain organizing LED group so that in any case, adjacent LED lamp belongs to different LED group more, wherein, during in multiple LED, each LED can be divided into and only be divided into described many group LED groups in any one group；Time slot grouping module, for the transmission time is divided into multiple time slot, with all LED transmission signal presetting LED group corresponding in same time slot, signal is launched during the LED difference of different lamp groups, to ensure described many group LED are often organized LED only at least one time slot transmission signal in the plurality of time slot, in any one time slot, only one group LED sends signal；Transmission time slot signal emission module, for launching described signal to be transmitted by described each LED in corresponding LED group correspondence transmission signal slot inter-sync, so that described signal to be transmitted is converted to current signal, and then the brightness of described each LED is controlled according to described current signal, modulation is transmitted to visible domain, to launch signal on the time slot set.
The visible light communication device of interference between the suppression lamp of the embodiment of the present invention, by multiple LED are grouped, and the transmission time is divided into multiple time slot, thus launch described signal to be transmitted in each LED in corresponding LED group correspondence transmission signal slot inter-sync, realize the transmission of LED group network, many lamps are effectively suppressed to disturb, solving under many light irradiations environment, multiple light courcess signal cannot effectively be differentiated by receiver, between lamp, cause cannot correct demodulated signal problem in interference, there is enforcement easily, with low cost, the features such as effect is obvious, simple easily realization.
It addition, the visible light communication device of interference can also have a following additional technical characteristic between suppression lamp according to the above embodiment of the present invention:
Further, in one embodiment of the invention, said method also includes: non-transmitting time slot current control module, for ensureing that LED does not transmit signal in non-transmitting signal slot, and in described non-transmitting signal slot, the average current of described each LED is equal to the average current of corresponding LED transmission signal slot.
Aspect and advantage that the present invention adds will part be given in the following description, and part will become apparent from the description below, or is recognized by the practice of the present invention.
Accompanying drawing explanation
The present invention above-mentioned and/or that add aspect and advantage will be apparent from easy to understand, wherein from the following description of the accompanying drawings of embodiments:
Fig. 1 is the flow chart of the visible light communication method of interference between the suppression lamp according to the embodiment of the present invention；
Fig. 2 is that the linear LED according to one embodiment of the invention arranges schematic diagram；
Fig. 3 is that the rectangle LED according to one embodiment of the invention arranges schematic diagram；
Fig. 4 is that the radiation LED according to one embodiment of the invention arranges schematic diagram；
Fig. 5 is the structural representation of the visible light communication device of interference between the suppression lamp according to the embodiment of the present invention；And
Fig. 6 is the structural representation of the visible light communication device of interference between the suppression lamp according to one embodiment of the invention.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, and the most same or similar label represents same or similar element or has the element of same or like function.The embodiment described below with reference to accompanying drawing is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
Describe with reference to the accompanying drawings and propose according to embodiments of the present invention, describe the most with reference to the accompanying drawings and to propose according to embodiments of the present invention.
Fig. 1 is the flow chart of the visible light communication method disturbed between the suppression lamp of the embodiment of the present invention.
As it is shown in figure 1, the visible light communication method of interference comprises the following steps between this suppression lamp:
In step S101, multiple LED are grouped, to obtain organizing LED group, wherein, during in multiple LED, each LED can be divided into many group LED groups at most one group more.
Wherein, in one embodiment of the invention, multiple LED can linearly arrange, and adjacent LED lamp belongs to different LED group；Multiple LED can rectangular arrange, and laterally adjacent LED belongs to different LED group, and longitudinally adjacent LED belongs to different LED group；Multiple LED can arrange in radiation, and width belongs to different LED group to adjacent LED lamp, and radially adjoining LED belongs to different LED group.
Preferably, in one embodiment of the invention, LED can be divided into two groups.
It is to say, first can carry out LED being divided into some lamp groups, such as, multiple LED be divided into two groups.
In step s 102, being divided into multiple time slot the transmission time, to ensure often to organize LED only at least one time slot transmission signal in multiple time slots in many group LED, and in any one time slot, only one group LED sends signal.
Further, in one embodiment of the invention, according to the power frequency component of supply and AC electricity, the transmission time is divided into multiple time slot.
For example, secondly the transmission time can carry out being divided into some time slots, such as, be divided into some time slots according to the power frequency component of supply and AC electricity, be preferably divided into two time slots, when ac signal be timing be the first time slot, when ac signal is for being the second time slot time negative.
In step s 103, signal to be transmitted is obtained after the bit after coding being carried out framing by LED each in multiple LED.
Further, in one embodiment of the invention, when in by multiple LED, each LED obtains signal to be transmitted after the bit after coding is carried out framing, modulator approach is one or more in OOK, PAM, QAM, FSK, PSK, OFDM, ACO-OFDM, PAM-DMT, HACO-OFDM.
It is understandable that, each LED obtains signal to be transmitted after the bit after coding is carried out framing, wherein, modulator approach can be the methods such as OOK, PAM, QAM, FSK, PSK, OFDM, ACO-OFDM, PAM-DMT, HACO-OFDM, and between different time-gap, between different lamp group, modulated signal method can be inconsistent.
In step S104, signal to be transmitted is launched in corresponding LED group correspondence transmission signal slot inter-sync by each LED, so that signal to be transmitted to be converted to current signal, and then according to the brightness of the current signal each LED of control, modulation is transmitted to visible domain.
Wherein, in one embodiment of the invention, multiple LED can be synchronized by the power frequency component of supply and AC electricity.
Further, in one embodiment of the invention, LED is not transmitted in signal, and non-transmitting signal slot in non-transmitting signal slot, and the average current of each LED is equal to the average current of corresponding LED transmission signal slot.
Specifically, in each lamp group, LED launches signal in the transmission signal slot inter-sync of its lamp group correspondence, signal to be transmitted is converted to current signal and controls the luminous intensity of LED, and modulation is transmitted to visible domain, does not transmit signal in non-transmitting time slot.Wherein, all LED are synchronized by the power frequency component of supply and AC electricity, and in non-transmitting signal slot, the average current of each LED is equal or approximately equal to the average current of corresponding LED transmission signal slot, so that human eye is detectable light intensity change.
For making it is further understood that the present invention, accompanying drawing will be combined by following example and be described in detail.
Embodiment 1
It is arranged on certain corridor ceiling as in figure 2 it is shown, LED signal source linearly arranges, all LED are divided into two groups, for convenience of describing, referred to as first group, second group, it is easily understood that the quantity difference of two groups of LED is less than or equal to 1, the LED that each two is adjacent is not admitted to same group.Meanwhile, corresponding for the time of transmitting is divided into two time slots, is that timing is referred to as the first time slot at alternating current, at alternating current for being referred to as the second time slot time negative.
First group of LED sends signal at the first time slot, and does not send signal at the second time slot；Second group of LED sends signal at the second time slot, and does not send signal at the first time slot；Each LED obtains signal to be transmitted after the bit after coding being carried out framing when sending signal, signal to be transmitted is converted to current signal and controls the luminous intensity of LED, uses OOK modulator approach to modulate visible domain and is transmitted；It is constant that LED sends light intensity when not sending signal, and the light of the brightness that light intensity is identical with average intensity when sending signal, to ensure that human eye will not experience the change of lamplight brightness.
Embodiment 2
It is arranged on certain corridor ceiling as it is shown on figure 3, LED signal source is square arrangement, all LED are divided into two groups, for convenience of describing, referred to as first group, second group.Laterally or longitudinally going up any, the LED that each two is adjacent is not admitted to same group.To ensure that the LED that any two is adjacent is not admitted to same group.Meanwhile, corresponding for the time of transmitting is divided into two time slots, is that timing is referred to as the first time slot at alternating current, at alternating current for being referred to as the second time slot time negative.
First group of LED sends signal at the first time slot, and does not send signal at the second time slot；Second group of LED sends signal at the second time slot, and does not send signal at the first time slot；Each LED obtains signal to be transmitted after the bit after coding being carried out framing when sending signal, signal to be transmitted is converted to current signal and controls the luminous intensity of LED, uses PAM modulator approach to modulate visible domain and is transmitted；It is constant that LED sends light intensity when not sending signal, and the light of the brightness that light intensity is identical with average intensity when sending signal, to ensure that human eye will not experience the change of lamplight brightness.
Embodiment 3
It is arranged on certain corridor ceiling as it is shown on figure 3, LED signal source is square arrangement, all LED are divided into three groups, for convenience of describing, referred to as first group, second group, the 3rd group.Laterally or longitudinally going up any, the LED that each two is adjacent is not admitted to same group.To ensure that the LED that any two is adjacent is not admitted to same group.Meanwhile, impartial it is divided into three time slots by corresponding for the time of transmitting, for convenience of describing, is called the first time slot, the second time slot and the 3rd time slot.
First group of LED sends signal at the first time slot, and does not send signal at second and third time slot；Second group of LED sends signal at the second time slot, and does not send signal at first and third time slot；3rd group of LED sends signal at the second time slot, and does not send signal at first and second time slot；After the bit after coding is carried out framing when sending signal by each LED, obtain signal to be transmitted, signal to be transmitted is converted to current signal and controls the luminous intensity of LED, use QAM modulation method to modulate visible domain and be transmitted；It is constant that LED sends light intensity when not sending signal, and the light of the brightness that light intensity is identical with average intensity when sending signal, to ensure that human eye will not experience the change of lamplight brightness.
Embodiment 4
As shown in Figure 4, LED signal source is that radiation arrangement is arranged on certain corridor ceiling, and all LED are divided into four groups, for convenience of describing, and referred to as first group, second group, the 3rd group, the 4th group.At any width to radially, two adjacent LED are not admitted to same group.To ensure that the LED that any two is adjacent is not admitted to same group.Meanwhile, corresponding for the time of transmitting is divided into four time slots, by alternating current be positive time impartial be divided into the first time slot, the second time slot, by alternating current be the negative time impartial be divided into the 3rd time slot, the 4th time slot.
First group of LED sends signal at the first time slot, and second and third, four time slots do not send signal；Second group of LED sends signal at the second time slot, and does not send signal at first and third, four time slots；3rd group of LED sends signal at the second time slot, and does not send signal at first and second, four time slots；4th group of LED sends signal at the second time slot, and does not send signal at first, second and third time slot；Each LED obtains signal to be transmitted after the bit after coding being carried out framing when sending signal, signal to be transmitted is converted to current signal and controls the luminous intensity of LED, uses OFDM modulation method to modulate visible domain and is transmitted；It is constant that LED sends light intensity when not sending signal, and the light of the brightness that light intensity is identical with average intensity when sending signal, to ensure that human eye will not experience the change of lamplight brightness.
The visible light communication method of interference between suppression lamp according to embodiments of the present invention, by multiple LED are grouped, and the transmission time is divided into multiple time slot, thus launch described signal to be transmitted in each LED in corresponding LED group correspondence transmission signal slot inter-sync, realize the transmission of LED group network, many lamps are effectively suppressed to disturb, solving under many light irradiations environment, multiple light courcess signal cannot effectively be differentiated by receiver, between lamp, cause cannot correct demodulated signal problem in interference, there is enforcement easily, with low cost, the features such as effect is obvious, simple easily realization.
The visible light communication device of interference between the suppression lamp proposed according to embodiments of the present invention is described referring next to accompanying drawing.
Fig. 5 is the structural representation of the visible light communication device disturbed between the suppression lamp of the embodiment of the present invention
As it is shown in figure 5, the visible light communication device 10 of interference includes between this suppression lamp: LED grouping module 100, time slot grouping module 200 and transmission time slot signal emission module 300.
Wherein, LED grouping module 100 is for being grouped multiple LED, and to obtain organizing LED group so that in any case, adjacent LED lamp belongs to different LED group, wherein, during in multiple LED, each LED can be divided into many group LED groups at most one group more.Time slot grouping module 200 is for being divided into multiple time slot by the transmission time, with all LED transmission signal presetting LED group corresponding in same time slot, signal is launched during the LED difference of different lamp groups, to ensure many group LED are often organized LED only at least one time slot transmission signal in multiple time slots, and in any one time slot, only one group LED sends signal.Transmission time slot signal emission module 300 is for launching signal to be transmitted by each LED in corresponding LED group correspondence transmission signal slot inter-sync, so that signal to be transmitted is converted to current signal, and then the brightness of each LED is controlled according to current signal, modulation is transmitted to visible domain, to launch signal on the time slot set.The device 10 of the embodiment of the present invention solves in the case of can receiving multiple-light signal, and between lamp, signal interferes with each other, thus the problem producing error code.
Further, in one embodiment of the invention, as shown in Figure 6, the device 10 of the embodiment of the present invention also includes: non-transmitting time slot current control module 400.Wherein, non-transmitting time slot current control module 400 is used for ensureing that LED is not transmitted in signal, and non-transmitting signal slot in non-transmitting signal slot, and the average current of each LED is equal to the average current of corresponding LED transmission signal slot.
Specifically, as shown in Figure 6, LED is divided into some groups by LED grouping module 100, and each LED is pertaining only to one group so that under any circumstance, and adjacent LED belongs to different groups；The transmission time is carried out being divided into some time slots by time slot grouping module 200, and in same time slot, corresponding LED group all LED transmission signal of presetting, launches signal during difference group LED difference；Transmission time slot signal emission module 300: each LED obtains signal to be transmitted after the signal after coding is carried out framing, signal to be transmitted is converted to current signal and controls the luminous intensity of LED, modulation is transmitted to visible domain, and the time slot that LED sets in time slot grouping module 200 is launched signal；Non-transmitting time slot current control module 400: do not transmit signal in non-transmitting time slot, in non-transmitting signal slot, the average current of each LED is equal or approximately equal to the average current of corresponding LED transmission signal slot, so that human eye is detectable light intensity change.
It should be noted that the visible light communication device of interference between the aforementioned suppression lamp that the explanation of the visible light communication embodiment of the method for interference between suppression lamp is also applied for this embodiment, here is omitted.
The visible light communication device of interference between suppression lamp according to embodiments of the present invention, by multiple LED are grouped, and the transmission time is divided into multiple time slot, thus launch described signal to be transmitted in each LED in corresponding LED group correspondence transmission signal slot inter-sync, realize the transmission of LED group network, many lamps are effectively suppressed to disturb, solving under many light irradiations environment, multiple light courcess signal cannot effectively be differentiated by receiver, between lamp, cause cannot correct demodulated signal problem in interference, there is enforcement easily, with low cost, the features such as effect is obvious, simple easily realization.
In describing the invention, it will be appreciated that, term " " center ", " longitudinally ", " laterally ", " length ", " width ", " thickness ", on " ", D score, " front ", " afterwards ", " left ", " right ", " vertically ", " level ", " push up ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axially ", " radially ", orientation or the position relationship of the instruction such as " circumferential " are based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not considered as limiting the invention.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or implicitly include at least one this feature.In describing the invention, " multiple " are meant that at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " is installed ", " being connected ", " connection ", the term such as " fixing " should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be to be mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be connection or the interaction relationship of two elements of two element internals, unless otherwise clear and definite restriction.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or be merely representative of fisrt feature level height higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height less than second feature.
In the description of this specification, the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means that the specific features, structure, material or the feature that combine this embodiment or example description are contained at least one embodiment or the example of the present invention.In this manual, the schematic representation of above-mentioned term is necessarily directed to identical embodiment or example.And, the specific features of description, structure, material or feature can be to combine in one or more embodiments in office or example in an appropriate manner.Additionally, in the case of the most conflicting, the feature of the different embodiments described in this specification or example and different embodiment or example can be combined and combine by those skilled in the art.
Although above it has been shown and described that embodiments of the invention, it is understandable that, above-described embodiment is exemplary, it is impossible to be interpreted as limitation of the present invention, and above-described embodiment can be changed, revises, replace and modification by those of ordinary skill in the art within the scope of the invention.
Claims (10)
1. one kind is suppressed the visible light communication method of interference between lamp, it is characterised in that comprise the following steps:
Multiple LED are grouped, to obtain organizing LED group, wherein, during in multiple LED, each LED is divided into described many group LED groups at most one group more；
The transmission time is divided into multiple time slot, and to ensure often to organize LED only at least one time slot transmission signal in the plurality of time slot in described many group LED, and in any one time slot, only one group LED sends signal；
Signal to be transmitted is obtained after the bit after coding being carried out framing by LED each in the plurality of LED；And
Described signal to be transmitted is launched in corresponding LED group correspondence transmission signal slot inter-sync by described each LED, so that described signal to be transmitted is converted to current signal, and then according to the brightness of the described current signal described each LED of control, modulation is transmitted to visible domain.
Method the most according to claim 1, it is characterised in that the plurality of LED linearly arranges, and adjacent LED lamp belongs to different LED group.
Method the most according to claim 1, it is characterised in that the rectangular arrangement of the plurality of LED, laterally adjacent LED belongs to different LED group, and longitudinally adjacent LED belongs to different LED group.
Method the most according to claim 1, it is characterised in that the plurality of LED is radiation arrangement, width belongs to different LED group to adjacent LED lamp, and radially adjoining LED belongs to different LED group.
Method the most according to claim 1, it is characterised in that the described transmission time is divided into the plurality of time slot according to the power frequency component of supply and AC electricity.
Method the most according to claim 1, it is characterized in that, when in by the plurality of LED, each LED obtains signal to be transmitted after the bit after coding is carried out framing, modulator approach is one or more in OOK, PAM, QAM, FSK, PSK, OFDM, ACO-OFDM, PAM-DMT, HACO-OFDM.
Method the most according to claim 1, it is characterised in that the plurality of LED is synchronized by the power frequency component of supply and AC electricity.
Method the most according to claim 1, it is characterised in that LED is not transmitted in signal, and described non-transmitting signal slot in non-transmitting signal slot, the average current of described each LED is equal to the average current of corresponding LED transmission signal slot.
9. one kind is suppressed the visible light communication device of interference between lamp, it is characterised in that including:
LED grouping module, for multiple LED being grouped, to obtain organizing LED group so that in any case, adjacent LED lamp belongs to different LED group, wherein, during in multiple LED, each LED is divided into described many group LED groups at most one group more；
Time slot grouping module, for the transmission time is divided into multiple time slot, with all LED transmission signal presetting LED group corresponding in same time slot, signal is launched during the LED difference of different lamp groups, to ensure described many group LED are often organized LED only at least one time slot transmission signal in the plurality of time slot, and in any one time slot, only one group LED sends signal；And
Transmission time slot signal emission module, for launching described signal to be transmitted by described each LED in corresponding LED group correspondence transmission signal slot inter-sync, so that described signal to be transmitted is converted to current signal, and then the brightness of described each LED is controlled according to described current signal, modulation is transmitted to visible domain, to launch signal on the time slot set.
Device the most according to claim 9, it is characterised in that also include:
Non-transmitting time slot current control module, is used for ensureing that LED is not transmitted in signal, and described non-transmitting signal slot in non-transmitting signal slot, and the average current of described each LED is equal to the average current of corresponding LED transmission signal slot.
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| CN109194408A (en) * | 2018-10-09 | 2019-01-11 | 湖北航天技术研究院总体设计所 | A kind of laser space communication emitter |
| CN110161545A (en) * | 2018-02-12 | 2019-08-23 | 清华大学 | Positioning system and its positioning signal generation method |
| CN110212981A (en) * | 2019-05-30 | 2019-09-06 | 江南大学 | A kind of visible light communication transmission method mixing single carrier and multi-carrier modulation |
| CN113422646A (en) * | 2021-05-31 | 2021-09-21 | 东北师范大学 | Zero value regression algorithm and device of HACO-OFDM modulation system |
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| CN110161545A (en) * | 2018-02-12 | 2019-08-23 | 清华大学 | Positioning system and its positioning signal generation method |
| CN110161545B (en) * | 2018-02-12 | 2022-04-15 | 清华大学 | Positioning system and positioning signal generation method thereof |
| CN109067466A (en) * | 2018-09-30 | 2018-12-21 | 京东方科技集团股份有限公司 | A kind of optical communication transmission device and receiver, launching technique and method of reseptance |
| CN109194408A (en) * | 2018-10-09 | 2019-01-11 | 湖北航天技术研究院总体设计所 | A kind of laser space communication emitter |
| CN109194408B (en) * | 2018-10-09 | 2020-08-18 | 湖北航天技术研究院总体设计所 | Space laser communication transmitting device |
| CN110212981A (en) * | 2019-05-30 | 2019-09-06 | 江南大学 | A kind of visible light communication transmission method mixing single carrier and multi-carrier modulation |
| CN110212981B (en) * | 2019-05-30 | 2021-12-17 | 江南大学 | Visible light communication transmission method mixing single carrier and multi-carrier modulation |
| CN113422646A (en) * | 2021-05-31 | 2021-09-21 | 东北师范大学 | Zero value regression algorithm and device of HACO-OFDM modulation system |
| CN113422646B (en) * | 2021-05-31 | 2023-06-13 | 东北师范大学 | Zero value regression method and device for HACO-OFDM modulation system |
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