CN106656328B - Space division-based multichannel beam splitting device VLC system and implementation method - Google Patents

Space division-based multichannel beam splitting device VLC system and implementation method Download PDF

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CN106656328B
CN106656328B CN201611080890.7A CN201611080890A CN106656328B CN 106656328 B CN106656328 B CN 106656328B CN 201611080890 A CN201611080890 A CN 201611080890A CN 106656328 B CN106656328 B CN 106656328B
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spatial light
polarizer
light modulation
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CN106656328A (en
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文尚胜
彭星
关伟鹏
吴津
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South China University of Technology SCUT
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B10/00Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/11Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
    • H04B10/114Indoor or close-range type systems
    • H04B10/116Visible light communication
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

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Abstract

The invention discloses a VLC system based on a space division multi-channel beam splitting device, which comprises: the system comprises a control management module, an LED lamp, a beam splitting beam device, a multi-beam communication link and a communication terminal; the invention also discloses a realization method of the VLC system based on the space division multi-channel beam splitting device, which comprises the following steps: 1. the LED lamp emits light beams carrying digital communication information and simultaneously enters the light beam expansion module; 2. expanding the light beam into polarized light for polarization processing; 3. the spatial light modulation module receives the control information of the control management module and simultaneously performs phase modulation processing on the light beam to generate a dynamic diffraction effect; 4. the dynamically diffracted light is transmitted from the spatial light modulation module to a second polaroid for further phase modulation; 5. after phase modulation, a multi-beam communication link is formed. The method has the advantages of optimizing the overall performance of the VLC system and the like.

Description

基于空间划分多通道分光束流装置VLC系统及实现方法VLC system and implementation method of multi-channel sub-beam flow device based on space division

技术领域technical field

本发明涉及可见光通信系统,特别设计一种基于空间划分多通道分光束流装置VLC系统及实现方法。The invention relates to a visible light communication system, and particularly designs a VLC system and an implementation method based on a space-divided multi-channel sub-beam flow device.

背景技术Background technique

VLC技术,作为一种利用发光设备发出高速明亮闪烁光信号来实现信息传输的新兴无线通信技术,具有绿色环保、无电磁干扰、数据传输速率大、功耗低、安全性能高等优点。VLC technology, as an emerging wireless communication technology that uses light-emitting devices to emit high-speed bright flashing light signals to achieve information transmission, has the advantages of green environmental protection, no electromagnetic interference, high data transmission rate, low power consumption, and high safety performance.

VLC通信系统虽具有很多优势,但是其整体通信性能存在不足,为了优化VLC通信系统,国内外业界提出了很多解决方案,如采取OFDM、QAM、WDM、MIMO等技术措施,同时,研究者在为实现精准的点对点通信链路上进行了很多研究,然而,这种VLC系统只能建立单个目标终端的通信链路,无法同时与多个通信终端进行连接。Although the VLC communication system has many advantages, its overall communication performance is insufficient. In order to optimize the VLC communication system, domestic and foreign industries have proposed many solutions, such as adopting OFDM, QAM, WDM, MIMO and other technical measures. A lot of research has been done on the realization of precise point-to-point communication links. However, this VLC system can only establish a communication link with a single target terminal, and cannot connect to multiple communication terminals at the same time.

发明内容Contents of the invention

为了克服现有技术的上述缺点与不足,本发明的首要目的在于提供一种基于空间划分多通道分光束流装置的VLC系统,该系统不仅具有绿色环保、无电磁干扰、数据传输速率大、功耗低、成本低、安全性高等优点,而且其可同时与多个通信终端进行连接。In order to overcome the above-mentioned shortcomings and deficiencies of the prior art, the primary purpose of the present invention is to provide a VLC system based on a space-divided multi-channel split beam flow device. The system not only has environmental protection, no electromagnetic interference, high data transmission rate, and high performance. It has the advantages of low power consumption, low cost, high security, etc., and it can be connected to multiple communication terminals at the same time.

为了克服现有技术的上述缺点与不足,本发明的另一目的在于提供一种基于空间划分多通道分光束流装置的VLC系统的实现方法。In order to overcome the above-mentioned shortcomings and deficiencies of the prior art, another object of the present invention is to provide a method for implementing a VLC system based on a spatially divided multi-channel split beam flow device.

本发明的首要目的通过以下技术方案实现:一种基于空间划分多通道分光束流装置的VLC系统,包括控制管理模块10、LED灯具20、分光束流装置30、多光束通信链路40和通信终端50,所述分光束流装置30包括光束扩展模块31、第一偏振片32、空间光调制模块33和第二偏振片模块34;进一步地,所述第一偏振片32和第二偏振片模块34对扩展光束进行相位调制;进一步地,所述光束扩展模块31的一端接收LED灯具20的光束流,所述光束扩展模块31的另一端输出扩展平行光;进一步地,所述扩展平行光的尺寸大小根据控制管理模块10的控制信息进行确定,所述第一偏振片32的一端接收光束扩展模块31输出的扩展平行光,所述第一偏振片32的另一端输出偏振化处理光束,所述空间光调制模块33的第一个端口接收第一偏振片32输出的偏振化处理光束,所述空间光调制模块33的第二个端口输出动态衍射光束流,所述空间光调制模块33的第三个端口连接控制管理模块10,所述第二偏振片模块34的一端接收空间光调制模块33输出的动态衍射光束流,所述第二偏振片模块34的另一端输出偏振化处理多光束通信链路40到自由空间。The primary purpose of the present invention is achieved through the following technical solutions: a VLC system based on space division multi-channel split beam flow device, including control management module 10, LED lamp 20, split beam flow device 30, multi-beam communication link 40 and communication Terminal 50, the split beam flow device 30 includes a beam expansion module 31, a first polarizer 32, a spatial light modulation module 33 and a second polarizer module 34; further, the first polarizer 32 and the second polarizer The module 34 performs phase modulation on the expanded beam; further, one end of the beam expansion module 31 receives the beam flow of the LED lamp 20, and the other end of the beam expansion module 31 outputs the expanded parallel light; further, the expanded parallel light The size of the first polarizer 32 is determined according to the control information of the control management module 10, one end of the first polarizer 32 receives the extended parallel light output by the beam expansion module 31, and the other end of the first polarizer 32 outputs a polarized light beam, The first port of the spatial light modulation module 33 receives the polarized light beam output by the first polarizer 32, the second port of the spatial light modulation module 33 outputs a dynamic diffracted beam flow, and the spatial light modulation module 33 The third port of the second polarizer module 34 is connected to the control management module 10, one end of the second polarizer module 34 receives the dynamic diffracted beam flow output by the spatial light modulation module 33, and the other end of the second polarizer module 34 outputs the polarization processed multiple Beam communication link 40 to free space.

进一步地,所述控制管理模块10通过通信终端50的位置信息确定多光束通信链路40的焦点位置,所述通信终端50是笔记本电脑、智能手机和平板电脑,所述通信系统50通过自带的闪光灯设备、具有光通信功能的便携式外接音频接口设备或具有光通信功能的便携式外接USB接口设备来进行VLC数据传输。Further, the control management module 10 determines the focus position of the multi-beam communication link 40 through the position information of the communication terminal 50, the communication terminal 50 is a notebook computer, a smart phone, and a tablet computer, and the communication system 50 is equipped with A flashlight device, a portable external audio interface device with optical communication function, or a portable external USB interface device with optical communication function for VLC data transmission.

进一步地,所述空间光调制模块33是具有8位即256级相位调制功能的液晶装置,所述控制管理模块10根据菲涅尔透镜函数控制空间光调制模块33的状态转变,所述空间光调制模块33具有动态衍射透镜的功能,所述动态衍射透镜的功能根据分光束流装置30接收的控制信息进行调整。Further, the spatial light modulation module 33 is a liquid crystal device with an 8-bit or 256-level phase modulation function, and the control management module 10 controls the state transition of the spatial light modulation module 33 according to the Fresnel lens function. The modulation module 33 has the function of a dynamic diffractive lens, and the function of the dynamic diffractive lens is adjusted according to the control information received by the split beam flow device 30 .

本发明的另一目的通过以下技术方案实现:一种基于空间划分多通道分光束流装置的VLC系统的实现方法,包括以下步骤:Another object of the present invention is achieved through the following technical solutions: a method for realizing a VLC system based on space division multi-channel sub-beam flow device, comprising the following steps:

步骤1、LED灯具20发射出携带数字通信信息的光束,并同时进入光束扩展模块31,所述光束扩展模块31将光束扩展为平行光束;Step 1. The LED lamp 20 emits a beam carrying digital communication information, and simultaneously enters the beam expansion module 31, and the beam expansion module 31 expands the beam into a parallel beam;

步骤2、扩展光束通过第一偏振片32成为偏振化处理的偏振光;Step 2, the expanded light beam passes through the first polarizer 32 to become polarized light treated with polarization;

步骤3、经偏振化处理的偏振光进入空间光调制33,所述空间光调制模块33接收控制管理模块10的控制信息并同时对光束进行相位调制处理使其产生动态衍射的效果;Step 3, the polarized light enters the spatial light modulation 33, and the spatial light modulation module 33 receives the control information of the control management module 10 and simultaneously performs phase modulation processing on the light beam to produce the effect of dynamic diffraction;

步骤4、经动态衍射后的从空间光调制模块33发射到第二偏振片34进行进一步的相位调制;Step 4, the dynamic diffraction is transmitted from the spatial light modulation module 33 to the second polarizer 34 for further phase modulation;

步骤5、相位调制后形成多光束通信链路40,所述多光束通信链路40为连接终端与内部VLC网络的通道。Step 5, after phase modulation, a multi-beam communication link 40 is formed, and the multi-beam communication link 40 is a channel connecting the terminal and the internal VLC network.

本发明的基于空间划分多通道分光束流装置的VLC系统包括:控制管理模块、分光束流装置、LED灯具和通信终端,所述通信终端包括笔记本电脑、智能手机和平板电脑等;所述控制管理模块根据通信终端位置信息控制分光束流焦点的移动,所述分光束流装置将LED灯光进行扩展和偏振化处理,并同时产生动态衍射效果,得到可供多通信终端连接的可见光通信分光束流。本系统通过分光束流装置的设计,克服了以往VLC系统点对点、单目标通信终端连接的缺点,优化了VLC系统的整体性能。The VLC system of the present invention based on space division and multi-channel split beam flow device includes: a control management module, a split beam flow device, LED lamps and a communication terminal, and the communication terminal includes a notebook computer, a smart phone and a tablet computer, etc.; the control The management module controls the movement of the focal point of the sub-beam flow according to the position information of the communication terminal. The said sub-beam flow device expands and polarizes the LED light, and produces a dynamic diffraction effect at the same time to obtain a visible light communication sub-beam that can be connected to multiple communication terminals. flow. Through the design of the split beam flow device, this system overcomes the shortcomings of point-to-point and single-target communication terminal connections in the previous VLC system, and optimizes the overall performance of the VLC system.

与现有技术相比,本发明具有以下优点和有益效果:Compared with the prior art, the present invention has the following advantages and beneficial effects:

1、本发明提出一种基于空间划分多通道分光束流装置的VLC系统及方法,与已有VLC系统相比,其可同时与多个通信终端进行连接,突破了以往单目标终端通信的限制。1. The present invention proposes a VLC system and method based on space-divided multi-channel split beam flow devices. Compared with the existing VLC system, it can be connected to multiple communication terminals at the same time, breaking through the previous limitation of single-target terminal communication .

2、本发明提出的VLC系统通过光学模块的设计,能有效提高分光束流的能量密度,提高系统信噪比。2. The VLC system proposed by the present invention can effectively increase the energy density of the sub-beam flow and improve the system signal-to-noise ratio through the design of the optical module.

3、本发明提出的VLC系统通过对偏振片和光调制模块对光束进行调制,无需依赖各种复杂的调制技术,动态衍射透镜模型的实现能有效提高系统的多终端通信性能。3. The VLC system proposed by the present invention modulates the light beam through the polarizer and the light modulation module without relying on various complex modulation techniques, and the realization of the dynamic diffraction lens model can effectively improve the multi-terminal communication performance of the system.

附图说明Description of drawings

图1为基于空间划分多通道分光束流装置的VLC系统示意图。Fig. 1 is a schematic diagram of a VLC system based on space division multi-channel split beam flow device.

图2为分光束流装置示意图。Fig. 2 is a schematic diagram of a beam splitting device.

图3为基于空间划分多通道分光束流装置的VLC系统实现方法示意图。Fig. 3 is a schematic diagram of a VLC system implementation method based on a space-divided multi-channel split beam flow device.

具体实施方式Detailed ways

下面结合实施例及附图,对本发明作进一步地详细说明,但本发明的实施方式不限于此。The present invention will be described in further detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

实施例Example

如图1所示,一种基于空间划分多通道分光束流装置的VLC系统,包括控制管理模块10、LED灯具20、分光束流装置30、多光束通信链路40和通信终端50,所述控制管理模块10主要用于接收通信终端50的位置信息并同时利用菲涅尔透镜函数对分光束流装置30进行调控,进而控制分光束流的空间分布状态;进一步地,所述多光束通信链路40具有相似度很够的动态衍射图像;进一步地,所述通信终端50是笔记本电脑、智能手机和平板电脑,所述通信系统50通过自带的闪光灯设备、具有光通信功能的便携式外接音频接口设备或具有光通信功能的便携式外接USB接口设备来进行VLC数据传输。As shown in Figure 1, a VLC system based on space division multi-channel split beam flow device includes a control management module 10, an LED lamp 20, a split beam flow device 30, a multi-beam communication link 40 and a communication terminal 50, the The control management module 10 is mainly used to receive the position information of the communication terminal 50 and at the same time use the Fresnel lens function to regulate the sub-beam flow device 30, and then control the spatial distribution state of the sub-beam flow; further, the multi-beam communication chain The road 40 has a dynamic diffraction image with sufficient similarity; further, the communication terminal 50 is a notebook computer, a smart phone and a tablet computer, and the communication system 50 uses a built-in flashlight device, a portable external audio system with an optical communication function, etc. Interface device or portable external USB interface device with optical communication function for VLC data transmission.

如图2所示,所述分光束流装置30包括光束扩展模块31、第一偏振片32、空间光调制模块33和第二偏振片模块34;进一步地,所述光束扩展模块31接收LED灯具发射的灯光并同时对光束进行扩展处理,使得从光束扩展模块31输出的为平行光束;进一步地,所述第一偏振片32和第二偏振片模块34主要用来协助空间光调制模块对光束的相位进行调制;进一步地,所述空间光调制模块33是具有8位即256级相位调制功能的液晶装置,所述控制管理模块10根据菲涅尔透镜函数控制空间光调制模块33的状态转变,所述空间光调制模块33具有动态衍射透镜的功能,所述动态衍射透镜的功能根据分光束流装置30接收的控制信息进行调整。As shown in FIG. 2 , the split beam flow device 30 includes a beam expansion module 31, a first polarizer 32, a spatial light modulation module 33 and a second polarizer module 34; further, the beam expansion module 31 receives LED lamps The emitted light is expanded at the same time to the light beam, so that the output from the beam expansion module 31 is a parallel light beam; further, the first polarizer 32 and the second polarizer module 34 are mainly used to assist the spatial light modulation module to adjust the light beam further, the spatial light modulation module 33 is a liquid crystal device with an 8-bit or 256-level phase modulation function, and the control management module 10 controls the state transition of the spatial light modulation module 33 according to the Fresnel lens function , the spatial light modulation module 33 has the function of a dynamic diffractive lens, and the function of the dynamic diffractive lens is adjusted according to the control information received by the split beam flow device 30 .

如图3所示,一种基于空间划分多通道分光束流装置的VLC系统的实现方法如下:所述LED 20发射出携带数字通信信息的光束,并同时进入光束扩展模块31,所述光束扩展模块31将光束扩展为平行光束,进一步地,所述扩展光束通过第一偏振片32成为偏振化处理的偏振光,进一步地,经偏振化处理的偏振光进入空间光调制33,所述空间光调制模块33接收控制管理模块10的控制信息并同时对光束进行相位调制处理使其产生动态衍射的效果,进一步地,经动态衍射后的从空间光调制模块33发射到第二偏振片34进行进一步的相位调制,进一步地,相位调制后形成多光束通信链路40,所述多光束通信链路40是连接终端与内部VLC网络的通道。As shown in Figure 3, a method for realizing a VLC system based on space division multi-channel sub-beam flow device is as follows: the LED 20 emits a beam carrying digital communication information, and enters the beam expansion module 31 at the same time, and the beam expansion The module 31 expands the light beam into a parallel light beam. Further, the expanded light beam passes through the first polarizer 32 to become polarized light, and further, the polarized light enters the spatial light modulation 33, and the spatial light The modulation module 33 receives the control information of the control management module 10 and at the same time performs phase modulation processing on the light beam to produce the effect of dynamic diffraction. Further, the dynamic diffraction is transmitted from the spatial light modulation module 33 to the second polarizer 34 for further processing. Further, after the phase modulation, a multi-beam communication link 40 is formed, and the multi-beam communication link 40 is a channel connecting the terminal and the internal VLC network.

上述实施例仅为本发明的一种实施方式,但本发明的实施方式并不受上述实施例的限制,其他任何未背离本发明的精神实质与原理下所作的改变、修饰、替代、组合、简化均应为等效的置换方式,都包含在本发明的保护范围之内。The above-mentioned embodiment is only one embodiment of the present invention, but the embodiment of the present invention is not limited by the above-mentioned embodiment, and any other changes, modifications, substitutions, combinations, All simplifications should be equivalent replacement methods, and all are included in the protection scope of the present invention.

Claims (3)

1.基于空间划分多通道分光束流装置的VLC系统,包括:控制管理模块(10)、LED灯具(20)、分光束流装置(30)、多光束通信链路(40)和通信终端(50),其特征在于:所述分光束流装置(30)包括:光束扩展模块(31)、第一偏振片(32)、空间光调制模块(33)和第二偏振片模块(34),所述光束扩展模块(31)的一端接收LED灯具(20)的光束流,所述光束扩展模块(31)的另一端输出扩展平行光,所述第一偏振片(32)的一端接收光束扩展模块(31)输出的扩展平行光,所述第一偏振片(32)的另一端输出偏振化处理光束,所述空间光调制模块(33)的第一个端口接收第一偏振片(32)输出的偏振化处理光束,所述空间光调制模块(33)的第二个端口输出动态衍射光束流,所述空间光调制模块(33)的第三个端口连接控制管理模块(10),所述第二偏振片模块(34)的一端接收空间光调制模块(33)输出的动态衍射光束流,所述第二偏振片模块(34)的另一端输出偏振化处理多光束通信链路(40)到自由空间;1. A VLC system based on space-divided multi-channel split beam flow devices, including: control management module (10), LED lamps (20), split beam flow devices (30), multi-beam communication links (40) and communication terminals ( 50), characterized in that: the beam splitting device (30) includes: a beam expansion module (31), a first polarizer (32), a spatial light modulation module (33) and a second polarizer module (34), One end of the beam expansion module (31) receives the beam flow of the LED lamp (20), the other end of the beam expansion module (31) outputs expanded parallel light, and one end of the first polarizer (32) receives the beam expansion The extended parallel light output by the module (31), the other end of the first polarizer (32) outputs a polarized light beam, and the first port of the spatial light modulation module (33) receives the first polarizer (32) The output polarized processing beam, the second port of the spatial light modulation module (33) outputs a dynamic diffracted beam flow, the third port of the spatial light modulation module (33) is connected to the control management module (10), the One end of the second polarizer module (34) receives the dynamic diffracted beam flow output by the spatial light modulation module (33), and the other end of the second polarizer module (34) outputs a polarization-processed multi-beam communication link (40 ) to free space; 所述控制管理模块(10)通过通信终端(50)的位置信息用于确定多光束通信链路(40)的焦点位置,所述通信终端(50)为笔记本电脑、智能手机或平板电脑,所述通信终端(50)通过自带的闪光灯设备、具有光通信功能的便携式外接音频接口设备或具有光通信功能的便携式外接USB接口设备进行VLC数据传输。The control management module (10) is used to determine the focus position of the multi-beam communication link (40) through the position information of the communication terminal (50), and the communication terminal (50) is a notebook computer, a smart phone or a tablet computer, so The communication terminal (50) performs VLC data transmission through its own flashlight device, a portable external audio interface device with optical communication function or a portable external USB interface device with optical communication function. 2.根据权利要求1所述的基于空间划分多通道分光束流装置的VLC系统,其特征在于:所述空间光调制模块(33)为具有256级相位调制功能的液晶装置,所述控制管理模块(10)根据菲涅尔透镜函数控制空间光调制模块(33)的状态转变,所述空间光调制模块(33)具有动态衍射透镜的功能。2. The VLC system based on space-divided multi-channel split beam flow device according to claim 1, characterized in that: the spatial light modulation module (33) is a liquid crystal device with 256-level phase modulation function, and the control management The module (10) controls the state transition of the spatial light modulation module (33) according to the Fresnel lens function, and the spatial light modulation module (33) has the function of a dynamic diffraction lens. 3.一种权利要求1所述的基于空间划分多通道分光束流装置的VLC系统的实现方法,其特征在于,包括以下步骤:3. a kind of realization method based on the VLC system of space division multi-channel sub-beam flow device according to claim 1, is characterized in that, comprises the following steps: 步骤1、LED灯具(20)发射出携带数字通信信息的光束,并同时进入光束扩展模块(31),所述光束扩展模块(31)将光束扩展为平行光束;Step 1. The LED lamp (20) emits a beam carrying digital communication information, and simultaneously enters the beam expansion module (31), and the beam expansion module (31) expands the beam into a parallel beam; 步骤2、扩展光束通过第一偏振片(32)成为偏振化处理的偏振光;Step 2, the expanded light beam passes through the first polarizer (32) to become polarized light after polarization treatment; 步骤3、经偏振化处理的偏振光进入空间光调制模块(33),所述空间光调制模块(33)接收控制管理模块(10)的控制信息并同时对光束进行相位调制处理使其产生动态衍射的效果;Step 3. The polarized light enters the spatial light modulation module (33), and the spatial light modulation module (33) receives the control information from the control management module (10) and at the same time performs phase modulation processing on the beam to generate a dynamic Diffraction effect; 步骤4、经动态衍射后的偏振光从空间光调制模块(33)发射到第二偏振片模块(34)进行进一步的相位调制;Step 4, the dynamically diffracted polarized light is transmitted from the spatial light modulation module (33) to the second polarizer module (34) for further phase modulation; 步骤5、相位调制后形成多光束通信链路(40),所述多光束通信链路(40)为连接通信终端与内部VLC网络的通道。Step 5, forming a multi-beam communication link (40) after phase modulation, and the multi-beam communication link (40) is a channel connecting the communication terminal and the internal VLC network.
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