1 / 11

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 Sources Date Submitted: March 2009 Source: Rick Roberts, Intel Corporation Address: Intel Oregon Labs

ronnie
Download Presentation

Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Project: IEEE P802.15 Working Group for Wireless Personal Area 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: richard.d.roberts@intel.com 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. Rick Roberts (Intel)

  2. 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. Rick Roberts (Intel)

  3. Harmonic Envelope Typical spectral output from the photodetector. This particular spectrum is from a halogen light bulb with the dimmer at 75% (100% is full brightness). Rick Roberts (Intel)

  4. The research was to characterize the harmonic spectral envelope for various readily available household lighting. All lights were operating on 60 Hz. CFL: compact fluorescent lamp Rick Roberts (Intel)

  5. 150 Watt Halogen Bulb Dimmer Values: 1.0 … full ON 0.25 … dim Spectrum is confined to approximately less than 2 KHz Rick Roberts (Intel)

  6. 60 Watt Incandescent Bulb Dimmer Values: 1.0 … full ON 0.25 … dim Spectrum is confined to approximately less than 2 KHz Rick Roberts (Intel)

  7. Dimmable 15 watt CFL Dimmer Values: 1.0 … full ON 0.25 … dim Spectrum is confined to approximately less than 22 KHz Rick Roberts (Intel)

  8. CFL Non-dimmable Bulbs Spectrum is confined to approximately less than 7 KHz Rick Roberts (Intel)

  9. Fluorescent Tubes Spectrum is confined to approximately less than 3 KHz (the 48” tube has a very clean spectrum) Rick Roberts (Intel)

  10. From doc 08/0061-02 … 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? Rick Roberts (Intel)

  11. 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. Rick Roberts (Intel)

More Related