Detail publikace

Spatial ODAC performance for indoor environment

Originální název

Spatial ODAC performance for indoor environment

Anglický název

Spatial ODAC performance for indoor environment

Jazyk

en

Originální abstrakt

The optical digital to analog conversion (ODAC) concept was introduced as a method able to cope with light- emitting diodes (LED) non-linear characteristic and dimming constraints. The approach is similar to an electrical digital-to- analog converter (DAC), where several digital bit streams are weighted in order to represent an analog signal. This technique enables simple on-off modulation schemes, which are able to take full advantage of the LEDs non-linear characteristic and also allow pulse-width modulation (PWM) dimming to be em- ployed for combined lighting and communication means. Unlike electrical DACs, and ODAC has a reconstruction error that depends not only on the bit depth of the converter, but also on the system set-up. This paper presents simulation results able to show the reconstruction error performance as a function of space, luminaire placement, LEDs half power angle (HPA) and photo detector field of view (FOV). The set-up assumes multipath due to reflections and low bit rates. Important conclusions point out for necessary precautions concerning the LEDs and photo detectors characteristics, which are linked to the number of LED luminaires inside the room and the uniformity of the lighting conditions.

Anglický abstrakt

The optical digital to analog conversion (ODAC) concept was introduced as a method able to cope with light- emitting diodes (LED) non-linear characteristic and dimming constraints. The approach is similar to an electrical digital-to- analog converter (DAC), where several digital bit streams are weighted in order to represent an analog signal. This technique enables simple on-off modulation schemes, which are able to take full advantage of the LEDs non-linear characteristic and also allow pulse-width modulation (PWM) dimming to be em- ployed for combined lighting and communication means. Unlike electrical DACs, and ODAC has a reconstruction error that depends not only on the bit depth of the converter, but also on the system set-up. This paper presents simulation results able to show the reconstruction error performance as a function of space, luminaire placement, LEDs half power angle (HPA) and photo detector field of view (FOV). The set-up assumes multipath due to reflections and low bit rates. Important conclusions point out for necessary precautions concerning the LEDs and photo detectors characteristics, which are linked to the number of LED luminaires inside the room and the uniformity of the lighting conditions.

BibTex


@inproceedings{BUT110350,
  author="Aleš {Dobesch} and Luis Nero {Alves} and Otakar {Wilfert}",
  title="Spatial ODAC performance for indoor environment",
  annote="The optical digital to analog conversion (ODAC)
concept was introduced as a method able to cope with light-
emitting diodes (LED) non-linear characteristic and dimming
constraints. The approach is similar to an electrical digital-to-
analog converter (DAC), where several digital bit streams are
weighted in order to represent an analog signal. This technique
enables simple on-off modulation schemes, which are able to
take full advantage of the LEDs non-linear characteristic and
also allow pulse-width modulation (PWM) dimming to be em-
ployed for combined lighting and communication means. Unlike
electrical DACs, and ODAC has a reconstruction error that
depends not only on the bit depth of the converter, but also
on the system set-up. This paper presents simulation results able
to show the reconstruction error performance as a function of
space, luminaire placement, LEDs half power angle (HPA) and
photo detector field of view (FOV). The set-up assumes multipath
due to reflections and low bit rates. Important conclusions point
out for necessary precautions concerning the LEDs and photo
detectors characteristics, which are linked to the number of LED
luminaires inside the room and the uniformity of the lighting
conditions.",
  booktitle="3rd International Workshop in Optical Wireless Communications (IWOW)",
  chapter="110350",
  howpublished="online",
  year="2014",
  month="september",
  pages="70--74",
  type="conference paper"
}