[국내논문]밴드패스 광 필터를 이용한 VLC 채널의 고휘도 RGB LED 잡음 제거 모델에 관한 연구 A Study on Noise Cancellation Model in VLC Channel caused by High Luminance of RGB LED, Using Band-Pass Optical Filters원문보기
LED조명의 강점을 토대로 LED조명이 보급되고 있으며, 다양한 정부정책이 시행되고 있다. 조명을 활용한 무선통신 기술인 VLC 연구가 활발히 이루어지고 있으며, 많은 연구를 통해서 고속 데이터 전송기와 같은 일반적인 LED 광원을 사용할 수 있다는 것이 증명되었다. 그러나 여전히 주요 문제 중 하나로 라디오 방송의 잡음과 유사한 빛의 간섭문제가 있다. 이에 본 논문에서는 스펙트럼 분리형 VLC 채널을 위한 광 필터를 사용하여 주변 조명의 간섭을 제거하기 위한 모델을 제안하였다. 제안한 모델의 검증을 위하여 다양한 고휘도 RGB LED모듈을 활용하여 비교분석을 진행하였으며, 추가로 실생활에 적용되어 활용 중인 고휘도 LED 조명을 활용한 실험을 통한 적용성을 검증하였다.
LED조명의 강점을 토대로 LED조명이 보급되고 있으며, 다양한 정부정책이 시행되고 있다. 조명을 활용한 무선통신 기술인 VLC 연구가 활발히 이루어지고 있으며, 많은 연구를 통해서 고속 데이터 전송기와 같은 일반적인 LED 광원을 사용할 수 있다는 것이 증명되었다. 그러나 여전히 주요 문제 중 하나로 라디오 방송의 잡음과 유사한 빛의 간섭문제가 있다. 이에 본 논문에서는 스펙트럼 분리형 VLC 채널을 위한 광 필터를 사용하여 주변 조명의 간섭을 제거하기 위한 모델을 제안하였다. 제안한 모델의 검증을 위하여 다양한 고휘도 RGB LED 모듈을 활용하여 비교분석을 진행하였으며, 추가로 실생활에 적용되어 활용 중인 고휘도 LED 조명을 활용한 실험을 통한 적용성을 검증하였다.
LED lighting is spreading on the strength of LED lighting, and various government policies are being implemented. VLC research which is a wireless communication technology using lighting has been actively conducted, and it has been proven through many studies that a general LED light source such as ...
LED lighting is spreading on the strength of LED lighting, and various government policies are being implemented. VLC research which is a wireless communication technology using lighting has been actively conducted, and it has been proven through many studies that a general LED light source such as a high-speed data transmitter can be used. But from now on, one of the main problems is the noise from side lights, which can be compared to the noise of radio broadcasts. So in this paper, we proposed a noise canceling model to remove the interference of ambient light by using an optical filter for a detachable VLC channel. In order to verify the proposed model, various high brightness RGB LED modules were used for comparative analysis. In addition, the applicability was verified through experiments using High Luminance LED lighting which is applied in real life.
LED lighting is spreading on the strength of LED lighting, and various government policies are being implemented. VLC research which is a wireless communication technology using lighting has been actively conducted, and it has been proven through many studies that a general LED light source such as a high-speed data transmitter can be used. But from now on, one of the main problems is the noise from side lights, which can be compared to the noise of radio broadcasts. So in this paper, we proposed a noise canceling model to remove the interference of ambient light by using an optical filter for a detachable VLC channel. In order to verify the proposed model, various high brightness RGB LED modules were used for comparative analysis. In addition, the applicability was verified through experiments using High Luminance LED lighting which is applied in real life.
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문제 정의
This paper is devoted to separation of low intensity light VLC channel in case of high influence of “noise” from other illumination sources.
제안 방법
But in real world RGB LED is recently just a side “noise” light. This paper proposed the noise canceling model to remove the interference of ambient light by using an optical filter for a detachable VLC channel. The goal of proposed system is for multichannel VLC forming based on using optical wavelength filtration, even in condition of high level of light noise from different types of LED.
This paper proposed the noise canceling model to remove the interference of ambient light by using an optical filter for a detachable VLC channel. The goal of proposed system is for multichannel VLC forming based on using optical wavelength filtration, even in condition of high level of light noise from different types of LED. The proposed model adopts a simple optical filter module of 600nm band for noise removal in the 600nm wavelength band.
The goal of proposed system is for multichannel VLC forming based on using optical wavelength filtration, even in condition of high level of light noise from different types of LED. The proposed model adopts a simple optical filter module of 600nm band for noise removal in the 600nm wavelength band.
The transmitter is designed to check the ON/OFF state of the lighting according to the surrounding lighting conditions by controlling the ON/OFF of the LED every one second. The receiver uses the photo resistors equipped with the 600nm band-pass optical filter, It is designed to recognize the brightness and to check the ON/OFF state of the lighting based on the brightness and output it through the serial monitor.
The results of metering were gain using simple Arduino code in the measuring range from 0 to 1023. All measures were made for all three pre-analyzed light sources with same conditions as spectrogram capturing. High level of illumination dropping was noted after filter passing.
First, the experiment was carried out indoors, During experiment for transmitting side simple code which turn on and turn of the 3V Epistar LED light with frequency 1000ms was used and other LEDs were constantly turned on “White” light with the highest illumination level.
In this paper, experiments were conducted in indoor and outdoor to verify the proposed model. First, the experiment was carried out indoors, During experiment for transmitting side simple code which turn on and turn of the 3V Epistar LED light with frequency 1000ms was used and other LEDs were constantly turned on “White” light with the highest illumination level.
In this paper, we proposed a model that can eliminate the interference of ambient light by applying band-pass optical filter to the problem that noise is generated due to the influence of ambient light in VLC environment using LED lighting. In order to verify the proposed model, we analyze the characteristics of the LED and implement the theoretical verification and actual transmitter and receiver that it is possible to effectively remove the noise in the 600nm band using the characteristics of the LED. Operating with the possibility of filtering wavelength create an opportunities of channel separation on a same light source with different form factor and construction of LED chip.
대상 데이터
4]. This maquette consist 2 types of LED, i.e. RGB WS2812 LED and 1W High Power LED (Epistar). One part of the maquette consist full-color RGB patch of 90 LED chips WS2812 which is imitating a typical street advertisement signage.
RGB WS2812 LED and 1W High Power LED (Epistar). One part of the maquette consist full-color RGB patch of 90 LED chips WS2812 which is imitating a typical street advertisement signage.
성능/효과
This means almost 45 times more for WS2812. Results of experiment showed that it is possible to receive light signal of blue-yellow phosphor LED through filter even if the illumination of other (RGB) source light is much higher.
The result of the experiment, confirmed that the data transmitted from the yellow-phosphor LED, which is common used in street lights, can be acquired normally even in the case of an “noise side light” based on RGB LED has much more high illumination level.
후속연구
Operating with the possibility of filtering wavelength create an opportunities of channel separation on a same light source with different form factor and construction of LED chip. It is expected that this paper will be used as a good research feed for VLC channel allocation in the future as various studies on VLC communication are under way.
참고문헌 (5)
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Louro P., Silva V., Rodrigues I., Vieira M. A. and Vieira M.(2016), "Transmission of signals using white LEDs for VLC applications," Materialstoday Proceedings, vol. 3, Iss. 3, pp.780-787.
Song J., Zhang W., Li Z., Zhou X., Sun J. and Wang C. -X.(2017), "A New Light Source of VLC Combining White LEDs and RGB LEDs," 2017 IEEE/CIC International Conference on Communications in China(ICCC).
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