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Optical space transmission system using visible light and infrared light

A space transmission and visible light technology, applied in transmission systems, free space transmission, electromagnetic wave transmission systems, etc., can solve problems such as low-speed optical communication and difficult high-speed communication, and achieve the effect of improving communication speed

Inactive Publication Date: 2009-08-05
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned illuminating light communication system using the conventional illuminating light communication device has a problem that only low-speed optical communication can be performed when the lighting is turned on.
Therefore, high-speed communication is difficult

Method used

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  • Optical space transmission system using visible light and infrared light
  • Optical space transmission system using visible light and infrared light
  • Optical space transmission system using visible light and infrared light

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0087] figure 1 It is a diagram showing a schematic configuration example of the optical space transmission system 100 according to the first embodiment of the present invention. Such as figure 1 As shown, the optical space transmission system 100 includes: an optical transmission device 110 and an optical receiving device 120 . The optical transmission device 110 includes a control unit 115 , a first modulation unit 113 , a second modulation unit 114 , a first optical transmission unit 111 , and a second optical transmission unit 112 . The light receiving device 120 includes a first light receiving unit 121 , a second light receiving unit 122 , a first demodulation unit 123 , a second demodulation unit 124 , and a data processing unit 125 .

[0088] figure 2 It is a schematic diagram of the modulation signal waveform for visible light output by the first modulation unit 113 and the modulation signal waveform for infrared light output by the second modulation unit 114 . ...

no. 2 Embodiment approach

[0096] image 3 It is a diagram showing a schematic configuration example of the optical space transmission system 200 according to the second embodiment of the present invention. Such as image 3 As shown, the optical space transmission system 200 includes an optical sending device 312 and an optical receiving device 321 . The optical transmission device 312 is compared to the optical transmission device 110 (refer to figure 1 ), the control unit 115 is replaced with the control unit 215 and further includes a spreading code generation unit 310 . Furthermore, the second modulation unit 114 included in the optical transmission device 312 includes a transmission data modulator 313 and an extension unit 311 . The optical receiving device 321 further includes the despreading unit 320 and does not include the data processing unit 125 , compared to the optical receiving device 120 included in the optical space transmission system 100 . Additionally, for image 3 The optical s...

no. 3 Embodiment approach

[0102] Figure 5 It is a diagram showing a schematic configuration example of the optical space transmission system 300 according to the third embodiment of the present invention. Such as Figure 5 As shown, the optical space transmission system 300 includes an optical sending device 312 and an optical receiving device 423 . The light receiving device 423 is compared with the light receiving device 321 (refer to image 3) includes a light receiving unit 420 , a first filter unit 421 and a second filter unit 422 instead of the first light receiving unit 121 and the second light receiving unit 122 . Additionally, for Figure 5 In the optical space transmission system 300 of the present invention, the same components as those of the optical space transmission system 200 of the second embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. Refer to the following Figure 5 , the operation of the optical space transmission system...

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PUM

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Abstract

The invention provides an optical space transmission system using visible light and infrared light. There are included a first modulating part that subjects a first data to a low-speed digital modulation; a second modulating part that subjects a second data to a high-speed digital modulation; a first light transmitting part that emits / quenches a visible light in accordance with an output signal from the first modulating part to transmit a visible-light signal conveying the first data; and a second light transmitting part that changes the intensity of the infrared light in accordance with an output signal from the second modulating part to transmit an infrared-light signal, which conveys the second data, in parallel with the visible-light signal.

Description

technical field [0001] The present invention relates to an optical space transmission system using light as a wireless signal, and more particularly to an optical space transmission system using both visible light and infrared light. Background technique [0002] As a prior art, there is an illuminating light communication device that uses a light source that irradiates visible light for illumination and infrared light not for illumination, and performs communication by including information to be transmitted in visible light and infrared light. Such an illuminating light communication device is described in Patent Document 1, for example. Figure 14 It is a structural schematic diagram of the illuminating light communication device 600 of patent document 1. The following combination Figure 14 , the operation of the illuminating light communication device 600 will be briefly described. First, when performing communication using illumination light (visible light) at the tim...

Claims

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Application Information

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IPC IPC(8): H04B1/707H04B10/04H04B10/06H04B10/10H04B10/105H04B10/142H04B10/152H04B10/22H04B10/11H04B10/112H04B10/118H04B10/516H04B10/61H04J14/00H04J14/02
CPCH04B10/114H04B10/116H04B1/707
Inventor 笹井裕之
Owner PANASONIC CORP
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