Jeff, I never claimed here or elsewhere that OFDM, or anything else for that matter, will provide excellent "long distance penetration abilities" (which I take to mean long distance NLOS results). If I did, I'd like to see where, because there is no way I would have ever intended to imply such.
Even your offlist mails to me never specified that you were holding me to some claim about long distance NLOS. My claims specifically refer to link paths within the sphere of what the U.S. wireless broadband might consider a typical cell - say about 5 miles. In an urban setting, cell sizes are always smaller, as a natural consequence of a much denser population relative to system capacity. Accordingly, it is not uncommon for urban cells to extend no mmore than about 3 miles - regardless of the capabilities of the technology. It is simply a capacity issue at that point. I do say that within those typical 5 miles or urban 3 miles, OFDM will provide MUCH, MUCH, MUCH better coverage of the footprint than DSSS or FHSS, and somewhat better than single carrier as well (we make that too - our WALKair lines use that). That's all I contend, though I contend that is very significant because it means a much higher of potential revenue is now accessable by your system. So far, any of our DSSS or FHSS customers have been shocked by the improvements in "connectibility" of once unreachable prospects and link stability using OFDM. It is also true that we do have examples of 6 mile plus links with zero LOS, but the advantage of knife-edged refraction off the obstructing ridge, achieving exceptionally stable links netting out 22Mbps. We have plenty of such stories and no way could these same links be made with anything else in our stable, including our very good outdoor 802.11b bridge or our FHSS bridges. How do we know? We tried. Kind regards, Patrick -- general wireless list, a bawug thing <http://www.bawug.org/> [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless
