Tim, your understanding of OFDM is way off. Extraordinarily stability is achieved with OFDM - far more than with our FHSS or our DSSS. We have examples of links having only a single packet error over several weeks. I am not basing these off theory, but off actual field results both beta and commercial deployments. Here is a link to some such tests done using our 3.5GHz OFDM PMP which has been shipping for 18 months and is in use in major carrier deployments around the world. This paper includes detailed photo examples of the links.
http://www.alvarion-usa.com/RunTime/Materials/KnowledgePoolFiles/alv_OFDM%20 wp.pdf Keep in mind, this is 3.5GHz equipment http://www.alvarion-usa.com/RunTime/Products_2020.asp?tNodeParam=33working off a very small channelization, so the max data rate is lower than our same products using 20MHz 5GHz channels (BreezeACCESS VL and BreezeACCESS LB). VL: http://www.alvarion-usa.com/RunTime/Products_2020.asp?tNodeParam=39 LB: http://www.alvarion-usa.com/RunTime/Products_2020.asp?tNodeParam=35 Patrick Alvarion -----Original Message----- From: 'Tim Pozar' [mailto:[EMAIL PROTECTED] Sent: Thursday, July 24, 2003 8:43 PM To: Patrick Leary Cc: Ladjicke Diouf; [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: Re: [BAWUG] 802.11b Long Range non line of sight On Thu, Jul 24, 2003 at 05:32:38PM -0700, Patrick Leary wrote: > Tim, I am not sure if you are talking about OFDM or DSSS. With OFDM, you > DON'T need LOS. Of course its not going to connect forever with NLOS, but > for a few miles, it is a no brainer. We have ample empirical data that > proves it. I haven't see your report but if you are basing it on using things like knife-edge diffraction or even multipath as your method of getting from point A to point B. I *would* be cautious about giving the link a high "up-time". Looking forward to the report... Tim This mail passed through mail.alvarion.com **************************************************************************** ******** This footnote confirms that this email message has been scanned by PineApp Mail-SeCure for the presence of malicious code, vandals & computer viruses. **************************************************************************** ******** -- general wireless list, a bawug thing <http://www.bawug.org/> [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless
