CN104038288B - A kind of visible light communication system based on natural optic communication - Google Patents
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Abstract
Description
技术领域technical field
本发明涉及可见光通信技术领域,更具体的说,涉及一种基于自然光通信的可见光通信系统。The present invention relates to the technical field of visible light communication, and more specifically, to a visible light communication system based on natural light communication.
背景技术Background technique
随着可见光通信技术的迅速发展,以白光LED(Light-Emitting Diode,发光二极管)可见光通信技术为主得到广泛应用。With the rapid development of visible light communication technology, white light LED (Light-Emitting Diode, Light Emitting Diode) visible light communication technology has been widely used.
白光LED主要分为两类:RGB LED(red-green-blue LED,红绿蓝发光二极管)和伪白色LED。相对于RGB LED,伪白色LED因为其低复杂度和低成本的特点占据了主要的照明市场。伪白色LED由蓝色的发光芯片和一层黄色的磷光体相互合作,蓝光经过黄色滤光片的过滤,形成伪白色的光。然而,由于磷光体的响应时间较长,伪白色LED的调制带宽被限制在了几MHz。White LEDs are mainly divided into two categories: RGB LEDs (red-green-blue LEDs) and pseudo-white LEDs. Compared with RGB LEDs, pseudo-white LEDs occupy the main lighting market because of their low complexity and low cost. Pseudo-white LEDs are composed of a blue light-emitting chip and a layer of yellow phosphor that cooperate with each other. The blue light is filtered by a yellow filter to form a pseudo-white light. However, the modulation bandwidth of pseudo-white LEDs is limited to a few MHz due to the long response time of the phosphor.
发明人通过对现有可见光通信技术的大量研究后发现,现有可见光通信技术中采用LED作为发射天线,即现有技术通过LED等人造光源照明设备作为可见光发射端。然而,由于人造光源LED发出的射线、光源闪烁和高照明度会严重影响人体的视觉神经,甚至会打乱人体的生物钟,扰乱生理节奏,因此长期使用LED光源会给人体带来危害。同时,LED受响应时间的影响,导致其调制带宽受到限制。After extensive research on existing visible light communication technologies, the inventors found that LEDs are used as transmitting antennas in existing visible light communication technologies, that is, artificial light source lighting devices such as LEDs are used as visible light transmitting terminals in the prior art. However, because the artificial light source LED emits rays, light source flicker and high illuminance will seriously affect the human visual nerve, and even disrupt the human body's biological clock and circadian rhythm, long-term use of LED light source will bring harm to the human body. At the same time, LEDs are affected by the response time, causing their modulation bandwidth to be limited.
发明内容Contents of the invention
针对上述问题,本发明提供一种基于自然光通信的可见光通信系统,其以自然光为基础实现可见光通信,绿色环保且克服了LED调制带宽受限的问题。技术方案如下:In view of the above problems, the present invention provides a visible light communication system based on natural light communication, which realizes visible light communication based on natural light, is environmentally friendly and overcomes the problem of limited LED modulation bandwidth. The technical solution is as follows:
本发明提供一种基于自然光通信的可见光通信系统,包括:The present invention provides a visible light communication system based on natural light communication, including:
接收自然光,检测接收到的所述自然光的强度并输出检测结果的自然光检测模块;A natural light detection module that receives natural light, detects the intensity of the received natural light and outputs the detection result;
接收自然光,依据所述自然光检测模块输出的检测结果,选择与所述检测结果对应的调制方式调制所述自然光的自然光调制模块;receiving natural light, and selecting a modulation mode corresponding to the detection result to modulate the natural light modulation module according to the detection result output by the natural light detection module;
其中,所述检测结果与所述调制方式一一对应。Wherein, the detection result is in one-to-one correspondence with the modulation mode.
优选地,所述自然光调制模块包括电控液晶和自然光调制单元;其中,所述电控液晶包括液晶层,所述液晶层上各区域施加不同的电信号时液晶分子排列方向和位置发生相应变化;Preferably, the natural light modulation module includes an electronically controlled liquid crystal and a natural light modulation unit; wherein the electrically controlled liquid crystal includes a liquid crystal layer, and when different electrical signals are applied to each area of the liquid crystal layer, the arrangement direction and position of the liquid crystal molecules change accordingly ;
所述自然光调制单元用于依据所述自然光检测模块输出的检测结果选择与所述检测结果对应的调制方式;The natural light modulation unit is used to select a modulation method corresponding to the detection result according to the detection result output by the natural light detection module;
所述电控液晶用于依据所述自然光调制单元选择的调制方式,控制所述液晶层上各区域施加不同的电信号,从而控制将数据信息调制加载到所述自然光中,完成对所述自然光的调制。The electronically controlled liquid crystal is used to control each region on the liquid crystal layer to apply different electrical signals according to the modulation mode selected by the natural light modulation unit, so as to control the modulation and loading of data information into the natural light, and complete the adjustment of the natural light modulation.
优选地,所述调制方式包括二进制启闭键控OOK调制方式、脉冲幅度调制4PAM调制方式或正交频分复用技术OFDM调制方式。Preferably, the modulation method includes a binary on-off keying OOK modulation method, a pulse amplitude modulation 4PAM modulation method or an orthogonal frequency division multiplexing technology OFDM modulation method.
优选地,所述自然光检测模块包括电信号检测模块和至少一个电信号生成模块;其中,Preferably, the natural light detection module includes an electrical signal detection module and at least one electrical signal generation module; wherein,
所述电信号生成模块用于接收所述自然光,并根据接收到的所述自然光生成电信号;其中,所述接收到的所述自然光的强度与生成的所述电信号的强度一一对应;The electrical signal generating module is configured to receive the natural light and generate an electrical signal according to the received natural light; wherein, the intensity of the received natural light corresponds to the intensity of the generated electrical signal;
所述电信号检测模块用于检测所述电信号生成模块生成的所述电信号的强度,将所述电信号的强度作为所述检测结果进行输出。The electric signal detection module is used to detect the strength of the electric signal generated by the electric signal generation module, and output the strength of the electric signal as the detection result.
优选地,所述电信号检测模块检测所述电信号生成模块生成的所述电信号的强度包括:所述电信号检测模块依据预设算法计算所述电信号的强度,并确定所述电信号的强度等级;其中,Preferably, detecting the strength of the electric signal generated by the electric signal generating module by the electric signal detection module includes: calculating the strength of the electric signal by the electric signal detection module according to a preset algorithm, and determining the strength of the electric signal intensity level; among them,
当所述电信号检测模块确定所述电信号的强度等级为优时,所述自然光调制模块选择OFDM调制方式;When the electrical signal detection module determines that the intensity level of the electrical signal is excellent, the natural light modulation module selects an OFDM modulation method;
当所述电信号检测模块确定所述电信号的强度等级为良时,所述自然光调制模块选择4PAM调制方式;When the electrical signal detection module determines that the intensity level of the electrical signal is good, the natural light modulation module selects a 4PAM modulation method;
当所述电信号检测模块确定所述电信号的强度等级为差时,所述自然光调制模块选择OOK调制方式。When the electrical signal detection module determines that the intensity level of the electrical signal is poor, the natural light modulation module selects an OOK modulation method.
优选地,所述电信号生成模块包括光电检测器。Preferably, the electrical signal generating module includes a photodetector.
优选地,所述自然光检测模块还包括至少一个光传感器,用于检测所述自然光的入射角度,以确定自然光源与所述自然光检测模块的相对位置。Preferably, the natural light detection module further includes at least one light sensor for detecting the incident angle of the natural light, so as to determine the relative position of the natural light source and the natural light detection module.
优选地,所述光传感器为太阳传感器。Preferably, the light sensor is a sun sensor.
应用上述技术方案,本发明提供一种基于自然光通信的可见光通信系统,本发明中自然光检测模块接收自然光,检测接收到的所述自然光的强度并输出检测结果,进而由自然光调制模块依据自然光检测模块输出的检测结果,选择与所述检测结果对应的调制方式调制自然光。因此,本发明以自然光为载体进行调制,相比于LED等人造光源照明设备更加绿色环保节能,且不存在给人体带来危害的问题。同时通过采用自然光调制模块直接调制自然光的方式,避免了可见光通信中由于LED特性导致的调制带宽受限的问题。Applying the above technical solution, the present invention provides a visible light communication system based on natural light communication. In the present invention, the natural light detection module receives natural light, detects the intensity of the received natural light and outputs the detection result, and then the natural light modulation module according to the natural light detection module For the output detection result, select a modulation mode corresponding to the detection result to modulate the natural light. Therefore, the present invention uses natural light as a carrier for modulation, which is more environmentally friendly and energy-saving than artificial light source lighting equipment such as LEDs, and does not cause harm to the human body. At the same time, by using the natural light modulation module to directly modulate natural light, the problem of limited modulation bandwidth caused by LED characteristics in visible light communication is avoided.
附图说明Description of drawings
为了更清楚地说明本发明实施例中的技术方案,下面将对实施例描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.
图1为本发明提供的一种基于自然光通信的可见光通信系统的一种结构示意图;FIG. 1 is a schematic structural diagram of a visible light communication system based on natural light communication provided by the present invention;
图2为本发明提供的一种基于自然光通信的可见光通信系统中自然光调制模块的结构示意图;2 is a schematic structural diagram of a natural light modulation module in a visible light communication system based on natural light communication provided by the present invention;
图3为本发明提供的一种基于自然光通信的可见光通信系统的另一种结构示意图;FIG. 3 is another structural schematic diagram of a visible light communication system based on natural light communication provided by the present invention;
图4为本发明提供的一种基于自然光通信的可见光通信系统中自然光检测模块的结构示意图;4 is a schematic structural diagram of a natural light detection module in a visible light communication system based on natural light communication provided by the present invention;
图5为本发明提供的一种基于自然光通信的可见光通信系统中自然光检测模块的另一种结构示意图。FIG. 5 is another structural schematic diagram of a natural light detection module in a visible light communication system based on natural light communication provided by the present invention.
具体实施方式detailed description
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
本发明保护的基于自然光通信的可见光通信系统可以为一具体的实体装置,该装置包括自然光检测模块和自然光调制模块。还可以为自然光检测模块和自然光调制模块分别为两个独立的实体装置,两者配合使用。本发明提供的基于自然光通信的可见光通信系统可以具体设置于玻璃等可以实现透光的物体上,用于接收自然光源如太阳等发射的自然光,并将其进行调制。The visible light communication system based on natural light communication protected by the present invention may be a specific physical device, which includes a natural light detection module and a natural light modulation module. The natural light detection module and the natural light modulation module may also be two independent physical devices, and the two are used together. The visible light communication system based on natural light communication provided by the present invention can be specifically arranged on objects such as glass that can realize light transmission, so as to receive and modulate natural light emitted by natural light sources such as the sun.
实施例一Embodiment one
请参见图1,其示出了本发明提供的一种基于自然光通信的可见光通信系统的一种结构示意图,包括:自然光检测模块100和自然光调制模块200。其中,Please refer to FIG. 1 , which shows a schematic structural diagram of a visible light communication system based on natural light communication provided by the present invention, including: a natural light detection module 100 and a natural light modulation module 200 . in,
自然光检测模块100用于接收自然光,检测接收到的自然光的强度并输出检测结果。The natural light detection module 100 is used for receiving natural light, detecting the intensity of the received natural light and outputting the detection result.
在本实施例中,自然光检测模块100可以独立安装于玻璃的周围或中心或其他任意位置,用于接收自然光,并检测接收到的自然光的强度,进而将检测到的检测结果输出至自然光调制模块200。In this embodiment, the natural light detection module 100 can be independently installed around or in the center of the glass or at any other position to receive natural light and detect the intensity of the received natural light, and then output the detected detection results to the natural light modulation module 200.
自然光调制模块200用于接收自然光,并依据自然光检测模块100输出的检测结果,选择与检测结果对应的调制方式调制自然光。The natural light modulation module 200 is used to receive natural light, and select a modulation method corresponding to the detection result to modulate the natural light according to the detection result output by the natural light detection module 100 .
其中,检测结果与调制方式一一对应。Wherein, there is a one-to-one correspondence between the detection result and the modulation mode.
在本实施例中,自然光调制模块200可以独立安装于玻璃的周围或中心或其他任意位置,其与自然光检测模块100通信连接。In this embodiment, the natural light modulation module 200 can be independently installed around or in the center of the glass or at any other position, and it is connected with the natural light detection module 100 in communication.
当然,本发明还可以将自然光检测模块100和自然光调制模块200集成为一个实体装置,安装于玻璃的周围或中心或其他任意位置。Of course, the present invention can also integrate the natural light detection module 100 and the natural light modulation module 200 into a physical device, which is installed around or in the center of the glass or at any other position.
在本发明中,可以预先设置自然光的强度等级。当自然光检测模块100检测自然光的强度后,根据检测到的自然光的强度值确定当前自然光的强度等级,并将当前电信号的强度等级作为检测结果进行输出。同时,还可以预先依据不同的电信号的强度等级设置不同的调制方式。当自然光调制模块200接收到自然光检测模块100输出的检测结果后,选择与检测结果对应的调制方式调制自然光。In the present invention, the intensity level of natural light can be preset. After the natural light detection module 100 detects the intensity of natural light, it determines the current intensity level of natural light according to the detected intensity value of natural light, and outputs the current intensity level of the electric signal as the detection result. At the same time, different modulation modes can also be set in advance according to the strength levels of different electrical signals. After receiving the detection result output by the natural light detection module 100, the natural light modulation module 200 selects a modulation method corresponding to the detection result to modulate the natural light.
应用本发明的上述技术方案,本发明通过自然光检测模块100接收自然光,检测接收到的所述自然光的强度并输出检测结果,进而由自然光调制模块200依据自然光检测模块100输出的检测结果,选择与所述检测结果对应的调制方式调制自然光。因此,本发明以自然光为载体进行调制,相比于LED等人造光源照明设备更加绿色环保节能,且不存在给人体带来危害的问题。同时通过采用自然光调制模块直接调制自然光的方式,避免了可见光通信中由于LED特性导致的调制带宽受限的问题。Applying the above-mentioned technical solution of the present invention, the present invention receives natural light through the natural light detection module 100, detects the intensity of the received natural light and outputs the detection result, and then the natural light modulation module 200 selects the detection result output by the natural light detection module 100 according to the The modulation mode corresponding to the detection result modulates the natural light. Therefore, the present invention uses natural light as the carrier for modulation, which is more environmentally friendly and energy-saving than artificial light source lighting equipment such as LEDs, and does not cause harm to the human body. At the same time, by using the natural light modulation module to directly modulate natural light, the problem of limited modulation bandwidth due to LED characteristics in visible light communication is avoided.
基于上述实施例,可参阅图2,其示出了本发明提供的一种基于自然光通信的可见光通信系统中自然光调制模块的结构示意图。其中,Based on the above embodiments, refer to FIG. 2 , which shows a schematic structural diagram of a natural light modulation module in a visible light communication system based on natural light communication provided by the present invention. in,
自然光调制模块200包括电控液晶210和自然光调制单元220。其中,电控液晶210包括液晶层211,所述液晶层211上各区域施加不同的电信号时液晶分子排列方向和位置发生相应变化。The natural light modulation module 200 includes an electronically controlled liquid crystal 210 and a natural light modulation unit 220 . Wherein, the electronically controlled liquid crystal 210 includes a liquid crystal layer 211 , and when different electrical signals are applied to each area of the liquid crystal layer 211 , the arrangement direction and position of the liquid crystal molecules change accordingly.
在本实施例中,电控液晶210中的液晶层211作为光调制材料,液晶层211采用向列型液晶的混合场效应工作模式。在液晶层211上各区域施加不同的电信号,可以引起液晶分子排列方向和位置的变化,从而导致电控液晶210光学性质的变化。In this embodiment, the liquid crystal layer 211 in the electronically controlled liquid crystal 210 is used as a light modulation material, and the liquid crystal layer 211 adopts a nematic liquid crystal mixed field effect working mode. Applying different electrical signals to various regions on the liquid crystal layer 211 can cause changes in the arrangement direction and position of the liquid crystal molecules, thereby resulting in changes in the optical properties of the electrically controlled liquid crystal 210 .
自然光调制单元220用于依据自然光检测模块100输出的检测结果选择与检测结果对应的调制方式。The natural light modulation unit 220 is configured to select a modulation method corresponding to the detection result according to the detection result output by the natural light detection module 100 .
在本实施例中,检测结果可以包括电信号的强度等级。其中,电信号的强度等级可以分为优、良、差三个等级。调制方式可以包括OOK(On-OffKeying,二进制启闭键控)调制方式、4PAM(Pulse Amplitude Modulation,脉冲幅度调制)调制方式以及OFDM(Orthogonal Frequency DivisionMultiplexing,正交频分复用技术)调制方式。In this embodiment, the detection result may include the intensity level of the electrical signal. Wherein, the intensity level of the electrical signal can be divided into three levels: excellent, good, and poor. The modulation method may include OOK (On-OffKeying, binary on-off keying) modulation method, 4PAM (Pulse Amplitude Modulation, pulse amplitude modulation) modulation method, and OFDM (Orthogonal Frequency Division Multiplexing, orthogonal frequency division multiplexing technology) modulation method.
此时,电控液晶210具体用于依据自然光调制单元220选择的调制方式,控制液晶层211上各区域施加不同的电信号,从而控制将数据信息调制加载到自然光中,完成对自然光的调制。At this time, the electronically controlled liquid crystal 210 is specifically used to control each region on the liquid crystal layer 211 to apply different electrical signals according to the modulation mode selected by the natural light modulation unit 220, so as to control the modulation and loading of data information into the natural light and complete the modulation of the natural light.
为了更好地实现对本发明的说明,请参阅图3,其示出了本发明提供的一种基于自然光通信的可见光通信系统的另一种结构示意图。其中,In order to better realize the description of the present invention, please refer to FIG. 3 , which shows another schematic structural diagram of a visible light communication system based on natural light communication provided by the present invention. in,
本发明保护的基于自然光通信的可见光通信系统外侧包括玻璃基板300。玻璃基板300为AR高透减反玻璃,透过率一峰值可以达到99%,反射率<1%。其AR玻璃膜层硬度要求与玻璃相当,大于7H,抗冲击性强。The outside of the visible light communication system based on natural light communication protected by the present invention includes a glass substrate 300 . The glass substrate 300 is AR high-transparency anti-reflection glass, the peak transmittance can reach 99%, and the reflectance is <1%. The hardness of the AR glass film layer is required to be equivalent to that of glass, greater than 7H, and has strong impact resistance.
自然光检测模块100设置于玻璃基板300上,可以包括分别设置自然光检测模块100位于玻璃基板300上的四周,或设置自然光检测模块100位于玻璃基板300上的任意位置。优选地,包括多个自然光检测模块100,均匀设置在玻璃基板300上的四周以及中心位置。自然光检测模块100接收来自太阳的自然光,检测接收到的自然光的强度并输出检测结果至自然光调制模块200。Setting the natural light detection module 100 on the glass substrate 300 may include setting the natural light detection module 100 around the glass substrate 300 , or setting the natural light detection module 100 at any position on the glass substrate 300 . Preferably, a plurality of natural light detection modules 100 are evenly arranged on the periphery and the center of the glass substrate 300 . The natural light detection module 100 receives natural light from the sun, detects the intensity of the received natural light and outputs the detection result to the natural light modulation module 200 .
自然光调制模块200中的自然光调制单元220依据自然光检测模块100输出的检测结果选择与检测结果对应的调制方式,此时电控液晶210依据自然光调制单元220选择的调制方式控制液晶层上各区域施加不同的电信号,以控制液晶分子的排列方向和位置的变化,对经过液晶层211的自然光进行强度调制加载信息。通过自然光调制模块200,自然光经过玻璃基板300后调制完成。The natural light modulation unit 220 in the natural light modulation module 200 selects a modulation method corresponding to the detection result according to the detection result output by the natural light detection module 100. At this time, the electronically controlled liquid crystal 210 controls each area on the liquid crystal layer according to the modulation method selected by the natural light modulation unit 220. Different electrical signals are used to control the alignment and position of liquid crystal molecules, and to modulate the intensity of natural light passing through the liquid crystal layer 211 to load information. Through the natural light modulation module 200 , the natural light is modulated after passing through the glass substrate 300 .
在上述实施例的基础上,可参阅图4,其示出了本发明提供的一种基于自然光通信的可见光通信系统中自然光检测模块的结构示意图。其中,On the basis of the above embodiments, refer to FIG. 4 , which shows a schematic structural diagram of a natural light detection module in a visible light communication system based on natural light communication provided by the present invention. in,
自然光检测模块100包括电信号检测模块110和至少一个电信号生成模块120。其中,The natural light detection module 100 includes an electrical signal detection module 110 and at least one electrical signal generation module 120 . in,
电信号生成模块120用于接收自然光,并根据接收到的自然光生成电信号。其中,接收到的自然光的强度与生成的电信号的强度一一对应。The electrical signal generating module 120 is used for receiving natural light, and generating an electrical signal according to the received natural light. Wherein, the intensity of the received natural light is in one-to-one correspondence with the intensity of the generated electrical signal.
在本实施例中,自然光的强度与电信号的强度成正比关系。当自然光的强度越强时,电信号生成模块120生成的电信号的强度越高,自然光的强度越低,电信号生成模块120生成的电信号的强度也就越低。因此,通过检测生成的电信号的强度即可实现对接收到的自然光的强度的检测。In this embodiment, the intensity of natural light is directly proportional to the intensity of the electrical signal. The stronger the intensity of the natural light, the higher the intensity of the electrical signal generated by the electrical signal generating module 120 , and the lower the intensity of the natural light, the lower the intensity of the electrical signal generated by the electrical signal generating module 120 . Therefore, the intensity of received natural light can be detected by detecting the intensity of the generated electrical signal.
在实际应用过程中,电信号生成模块120会接收到来自自然环境中的其他光的干扰,为了保证电信号生成模块120检测到的电信号的准确性,优选地,包括多个电信号生成模块120,分别检测来自来自不同角度的自然光。In the actual application process, the electrical signal generating module 120 will receive interference from other lights in the natural environment. In order to ensure the accuracy of the electrical signal detected by the electrical signal generating module 120, preferably, multiple electrical signal generating modules are included 120, respectively detecting natural light from different angles.
在本发明中,优选地,电信号生成模块120可以为将光信号转化为电信号的光电检测器。因此,自然光光照强度越大,光电检测器转化到的电信号的强度越强。In the present invention, preferably, the electrical signal generating module 120 may be a photodetector that converts optical signals into electrical signals. Therefore, the greater the intensity of natural light, the stronger the intensity of the electrical signal converted by the photodetector.
电信号检测模块110用于检测电信号的强度,将电信号的强度作为检测结果进行输出。The electric signal detection module 110 is used to detect the strength of the electric signal, and output the strength of the electric signal as the detection result.
在本实施例中,电信号检测模块110依据预设算法计算电信号的强度,并确定所述电信号的强度等级。在实际应用过程中,需要考虑自然环境中光强度的大小、目标传输速率要求以及误码率限制等条件,因此,根据不同场景,分别设置不同的预设算法,根据预设算法确定电信号的强度,进而确定电信号的强度等级,以确保系统的准确性。In this embodiment, the electrical signal detection module 110 calculates the intensity of the electrical signal according to a preset algorithm, and determines the intensity level of the electrical signal. In the actual application process, conditions such as the size of the light intensity in the natural environment, the requirements of the target transmission rate, and the limitation of the bit error rate need to be considered. Strength, and then determine the strength level of the electrical signal to ensure the accuracy of the system.
此时,自然光调制单元220具体用于依据电信号检测模块110确定的电信号的强度等级,选择与该强度等级相对应的调制方式。At this time, the natural light modulation unit 220 is specifically configured to select a modulation method corresponding to the intensity level of the electrical signal determined by the electrical signal detection module 110 .
具体地,可以包括:Specifically, it may include:
当电信号检测模块110确定电信号的强度等级为优时,自然光调制单元220选择OFDM调制方式;When the electrical signal detection module 110 determines that the intensity level of the electrical signal is excellent, the natural light modulation unit 220 selects the OFDM modulation mode;
当电信号检测模块110确定电信号的强度等级为良时,自然光调制单元220选择4PAM调制方式;When the electrical signal detection module 110 determines that the intensity level of the electrical signal is good, the natural light modulation unit 220 selects the 4PAM modulation mode;
当电信号检测模块110确定电信号的强度等级为差时,自然光调制单元220选择OOK调制方式。When the electrical signal detection module 110 determines that the intensity level of the electrical signal is poor, the natural light modulation unit 220 selects the OOK modulation mode.
在上述实施例的基础上,请参阅图5,其示出了本发明提供的一种基于自然光通信的可见光通信系统中自然光检测模块的另一种结构示意图。其中,自然光检测模块100还包括至少一个光传感器130。其中,光传感器130用于检测自然光的入射角度,以确定自然光源与自然光检测模块100的相对位置。On the basis of the above embodiments, please refer to FIG. 5 , which shows another schematic structural diagram of a natural light detection module in a visible light communication system based on natural light communication provided by the present invention. Wherein, the natural light detection module 100 further includes at least one light sensor 130 . Wherein, the light sensor 130 is used to detect the incident angle of natural light, so as to determine the relative position of the natural light source and the natural light detection module 100 .
在本实施例中,光传感器130为太阳传感器。In this embodiment, the light sensor 130 is a sun sensor.
具体地,光传感器130检测自然光的入射角度,通过判断自然光的入射角度可以确定出自然光源相对于自然光检测模块100的相对位置。进而依据确定出的自然光源相对于自然光检测模块100的相对位置调整引入自然光的方向,保证充分地引入自然光。Specifically, the light sensor 130 detects the incident angle of the natural light, and the relative position of the natural light source relative to the natural light detection module 100 can be determined by judging the incident angle of the natural light. Furthermore, the direction of introducing natural light is adjusted according to the determined relative position of the natural light source relative to the natural light detection module 100, so as to ensure sufficient introduction of natural light.
需要说明的是,本说明书中的各个实施例均采用递进的方式描述,每个实施例重点说明的都是与其他实施例的不同之处,各个实施例之间相同相似的部分互相参见即可。It should be noted that each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. For the same and similar parts in each embodiment, refer to each other, that is, Can.
最后,还需要说明的是,在本文中,诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来,而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且,术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含,从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素,而且还包括没有明确列出的其他要素,或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下,由语句“包括一个……”限定的要素,并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。Finally, it should also be noted that in this text, relational terms such as first and second etc. are only used to distinguish one entity or operation from another, and do not necessarily require or imply that these entities or operations, any such actual relationship or order exists. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.
以上对本发明所提供的一种基于自然光通信的可见光通信系统进行了详细介绍,本文中应用了具体个例对本发明的原理及实施方式进行了阐述,以上实施例的说明只是用于帮助理解本发明的方法及其核心思想;同时,对于本领域的一般技术人员,依据本发明的思想,在具体实施方式及应用范围上均会有改变之处,综上所述,本说明书内容不应理解为对本发明的限制。A visible light communication system based on natural light communication provided by the present invention has been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only used to help understand the present invention. method and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and scope of application. In summary, the content of this specification should not be understood as Limitations on the Invention.
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