Fair enough, so here is a list of a few of the areas where we tested and/or have implemented OFDM in scaled deployments so far: - extremely urban-type low building density of a major city in South America - heavily foliated coastal hills, across bays, and urban settings in New Zealand - low mountains with heavy deciduous tree coverage in rural western Maryland - coastal Southern California with little vegetation - flat arid, with marginal density in the Texas Panhandle - heavily foliated and urban landscapes in Hungary - deep in the very heavy coniferous high mountains in rural British Columbia in Canada - an urban landscape in the Russian steps
I'd say this is a fairly strong cross section of environments. Have any more negatives you might like to guess about on things you have never seen? Patrick Leary Alvarion -----Original Message----- From: Jim Thompson [mailto:[EMAIL PROTECTED] Sent: Friday, July 25, 2003 3:41 AM To: Patrick Leary Cc: 'Tim Pozar'; Ladjicke Diouf; [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: RE: [BAWUG] 802.11b Long Range non line of sight Empirical data can only demonstrate results in the environment you studied. Proofs require mathematics. Patrick Leary writes: > 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. > > Patrick > > -----Original Message----- > From: Tim Pozar [mailto:[EMAIL PROTECTED] > Sent: Thursday, July 24, 2003 8:27 PM > To: Ladjicke Diouf > Cc: Patrick Leary; [EMAIL PROTECTED]; [EMAIL PROTECTED] > Subject: Re: [BAWUG] 802.11b Long Range non line of sight > > > On Thu, Jul 24, 2003 at 02:26:26PM -0700, Ladjicke Diouf wrote: > > Can somebody shed some light on how OFDM helps NLOS, I thought it was just > > > a coding scheme like DSSS for 802.11b > > You still need LOS. OFDM of DSSS will handle interference (ie. > "smearing" ) of the signal better with the lower symbol rate. Things > like multipath will be less of an issue. Still an issue, but less > pronounced. > > Tim > -- > Snail: Tim Pozar / LNS / 1978 45th Ave / San Francisco CA 94116 / USA > POTS: +1 415 665 3790 Radio: KC6GNJ / KAE6247 > "Be who you are and say what you feel because the people who mind > don't matter and the people who matter don't mind." - Dr. Seuss > > > 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 > -- "Speed, it seems to me, provides the one genuinely modern pleasure." -- Aldous Huxley (1894 - 1963) 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
