Doc.: IEEE 802.15-09-0136-00-0007 Submission March 2009 Rick Roberts (Intel)Slide 1 Project: IEEE...
11
March 2009 Rick Roberts (Intel) Slide 1 doc.: IEEE 802.15-09-0136- 00-0007 Submiss ion Project: IEEE P802.15 Working Group for Wireless Personal Area Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Networks (WPANs) Submission Title: Qualitative Spectral Analysis of Common Household Light Sources Date Submitted: March 2009 Source: Rick Roberts, Intel Corporation Address: Intel Oregon Labs Voice: 503-712-5012, E-Mail: [email protected] Re: Abstract: Purpose: Notice: This document has been prepared to assist the IEEE P802.15. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P802.15.
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Transcript of Doc.: IEEE 802.15-09-0136-00-0007 Submission March 2009 Rick Roberts (Intel)Slide 1 Project: IEEE...
March 2009
Rick Roberts (Intel)Slide 1
doc.: IEEE 802.15-09-0136-00-0007
Submission
Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: Qualitative Spectral Analysis of Common Household Light SourcesDate Submitted: March 2009Source: Rick Roberts, Intel CorporationAddress: Intel Oregon LabsVoice: 503-712-5012, E-Mail: [email protected]
Re:
Abstract:
Purpose:
Notice: This document has been prepared to assist the IEEE P802.15. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein.Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P802.15.
March 2009
Rick Roberts (Intel)Slide 2
doc.: IEEE 802.15-09-0136-00-0007
Submission
Qualitative analysis means that all amplitude levels are relative to the 120 Hz spectral line.
Lab setup: representative light bulbs, light dimmer, light source and photodetector. During testing the detector was battery powered to eliminate 60 Hz.
March 2009
Rick Roberts (Intel)Slide 3
doc.: IEEE 802.15-09-0136-00-0007
Submission
Typical spectral output from the photodetector. This particular spectrum is from a halogen light bulb with the dimmer at 75% (100% is full brightness).
HarmonicEnvelope
March 2009
Rick Roberts (Intel)Slide 4
doc.: IEEE 802.15-09-0136-00-0007
Submission
The research was to characterize the harmonic spectral envelope for various readily available household lighting. All lights were operating on 60 Hz.
Bulb A GE Halogen bulb, 150 watts
Bulb B Bright Effects, 60 Watt incandescent
Bulb C GE Dimmable CFL, 15 watts
Bulb D FEIT Electric, 15 watt Ecobulb CFL
Bulb E Bright Effects, 13 watt Soft White CFL
Bulb F Bright Effects, 11 watt Daylight CFL
24” 24 inch fluorescent tube
48” 48 inch fluorescent tube
CFL: compact fluorescent lamp
March 2009
Rick Roberts (Intel)Slide 5
doc.: IEEE 802.15-09-0136-00-0007
Submission
Bulb A
-60
-50
-40
-30
-20
-10
0
120 320 520 720 920 1120 1320 1520 1720 1920 2120
Hertz
dB
No Dimmer Dimmer 1.0 Dimmer 0.75 Dimmer 0.5 Dimmer 0.25
150 Watt Halogen Bulb
Spectrum is confined to approximately less than 2 KHz
Dimmer Values:1.0 … full ON0.25 … dim
March 2009
Rick Roberts (Intel)Slide 6
doc.: IEEE 802.15-09-0136-00-0007
Submission
Bulb B
-60
-50
-40
-30
-20
-10
0
120 320 520 720 920 1120 1320 1520 1720 1920 2120
Hertz
dB
No Dimmer Dimmer 1.0 Dimmer 0.75 Dimmer 0.5 Dimmer 0.25
Dimmer Values:1.0 … full ON0.25 … dim
60 Watt Incandescent Bulb
Spectrum is confined to approximately less than 2 KHz
March 2009
Rick Roberts (Intel)Slide 7
doc.: IEEE 802.15-09-0136-00-0007
Submission
Bulb C
-60
-50
-40
-30
-20
-10
0
0 2000 4000 6000 8000 10000 12000 14000 16000 18000 20000 22000
Hertz
dB
No Dimmer Dimmer 1.0 Dimmer 0.75 Dimmer 0.5 Dimmer 0.25Dimmer Values:1.0 … full ON0.25 … dim
Dimmable 15 watt CFL
Spectrum is confined to approximately less than 22 KHz
March 2009
Rick Roberts (Intel)Slide 8
doc.: IEEE 802.15-09-0136-00-0007
Submission
CFL Non-dimmable Bulbs
-60
-50
-40
-30
-20
-10
0
0 1000 2000 3000 4000 5000 6000 7000
Hertz
dB
Bulb D Bulb E Bulb F
CFL Non-dimmable Bulbs
Spectrum is confined to approximately less than 7 KHz
March 2009
Rick Roberts (Intel)Slide 9
doc.: IEEE 802.15-09-0136-00-0007
Submission
Fluorescent
-60
-50
-40
-30
-20
-10
0
0 500 1000 1500 2000 2500 3000
Hertz
dB
48' tube 24" tube
Fluorescent Tubes
Spectrum is confined to approximately less than 3 KHz(the 48” tube has a very clean spectrum)
March 2009
Rick Roberts (Intel)Slide 10
doc.: IEEE 802.15-09-0136-00-0007
Submission
We did not test with an inverter fluorescent lamp. The highest spectral components we observed fall within frequency range 1. It would be useful to have more information about interference sources that generate significant energy above 40 KHz. How would inverter fluorescent lamps be deployed in VLC environments?
From doc 08/0061-02 …
March 2009
Rick Roberts (Intel)Slide 11
doc.: IEEE 802.15-09-0136-00-0007
Submission
Conclusions
Other then for the dimmable CFL, the spectrum of the detected interference light is <10 KHz. If the dimmable CFL is included then the spectrum extends up to about 22 KHz under certain dimming conditions.
