I try to see Li-Fi as a good idea, but is it realistic to make such devices / system within the next years .... ? And what is next years? ... I find it hard that Li-Fi should outperform regular radiocommunication (kHz to GHz).
Cheers Amund -----Opprinnelig melding----- Fra: Brian O'Connell [mailto:[email protected]] Sendt: 11. desember 2017 20:36 Til: [email protected] Emne: Re: [PSES] Li-Fi Three observations. 1. would have side-effects somewhat analogous to BPL on EMC. And the up/down rate would probably have same problems and delay as satellite internet. 2. different modality of old tech - remember the science fair projects using laser com from bazillions years past? 3. Ted said that he 'discounted' TED talks (we had thought they were named for him). Some references 0. en.wikipedia.org/wiki/Visible_light_communication 1. en.wikipedia.org/wiki/Free-space_optical_communication 2. en.wikipedia.org/wiki/Li-Fi 3. en.wikipedia.org/wiki/RONJA Brian From: Edward Price [mailto:[email protected]] Sent: Monday, December 11, 2017 10:44 AM To: [email protected] Subject: Re: [PSES] Li-Fi I seem to recall HP was touting some kind of optical link system back in the 90's. (IIRC, it was omni-directional infrared.) I think they were suggesting it for sharing of a printer within a multi-computer office, or for linking test equipment into a lab's mini-computer. While I can see some uses where a modulated light source, powerful yet inexpensive, would be a good data link, I can also see a few problems, the first of which is bi-directionality and the second is data capacity ahead of the optical links. As for his hints of vehicular applications, we still haven't eliminated rain, smoke and fog. Call me cynical, but whenever somebody puts a box on stage and does magic engineering, I become skeptical. Whaddya mean, you don't want to get into the details? Altogether, Li-Fi is yet another path. Ubiquitous LED's make it more attractive, but not quite a standing ovation quality concept. Ed Price WB6WSN Chula Vista, CA USA -----Original Message----- From: Ralph McDiarmid [mailto:[email protected]] Sent: Monday, December 11, 2017 8:21 AM To: [email protected] Subject: Re: [PSES] Li-Fi I haven't studied it, but seems to me that one would need to modulate the light very quickly to get any sort of usable BAUD rate, unless you settle for transmission of text only. (like the good old Bell 202 modems over voice band land lines) Ralph McDiarmid Product Compliance Engineering Solar Business Schneider Electric -----Original Message----- From: Amund Westin [mailto:[email protected]] Sent: Monday, December 11, 2017 12:51 AM To: [email protected] Subject: [PSES] Li-Fi I came over this video .... https://www.ted.com/talks/harald_haas_a_breakthrough_new_kind_of_wireless_in ternet#t-432451 Anyone who have studied this tech? Cheers, Amund David Heald <[email protected]> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
