You're right, big companies are realizing that there's a lot of money to be made on Wireless LANS and they're trying to cash on it. I hope we can keep this mailing list clean and not a marketing tool for company X or Z
Ladjicke
From: [EMAIL PROTECTED] To: "'[EMAIL PROTECTED]'" <[EMAIL PROTECTED]> Subject: Re: [BAWUG] 802.11b Long Range non line of sight Date: Wed, 30 Jul 2003 21:07:38 -0600
With DSSS and FHSS, you don't need LOS either. But there are extreme limits on
distance and when it comes to getting links on a sectored or omni directional
ptmp system, your going to be hit-and-miss.
From what I've heard, the 900Mhz stuff works well, very well, NLOS like we see
on our cell phones, where a general wall or building isn't going to kill your
signal to an unusable amount. But at 2.4Ghz and 5.8Ghz, even with OFDM and AP's
that cost $2500+ each and $600-1000 CPE, your not going to only battle
hit-and-miss coverage, but then you begin the battle price vs widespread
acceptance of the technology.
UWB might be the next big step, where, instead of a complete loss of a
connection, you only lose part of the connection that is blocked and the
throughput may fall, but may still be usable at 100Mbit of sustained throughput,
even with error rates.
Personally, I think that OFDM is useless unless it becomes affordable. Alvarion
has never brought equipment down to a generally affordable level, in contrast to
other existing equipment solutions. So I don't have much faith in anything that
Alvarion claims, even if it is true and does work, cuz we don't want to go broke
implementing proprietary solutions that give no consideration to current market
demands, including price requirements for acceptance.
By widespread acceptance, I mean that at some point, the equipment would become
fairly "standard" for the industry.
Judd
Jeff King wrote:
> Thanks Patrick. What I am looking for is the "white paper" that will qualify
> your statement: "With OFDM, you DON'T need LOS." in the context of the title
> of this thread (or at least the frequency domain).
>
> --
> Jeff King, [EMAIL PROTECTED] on 07/29/2003
>
> On Tue, 29 Jul 2003 17:15:04 -0700, Patrick Leary wrote:
> >Until I can link to our paper, here are some resources to study
> >OFDM.
> >
> >http://www.palowireless.com/ofdm/tutorials.asp
>
> --
> general wireless list, a bawug thing <http://www.bawug.org/>
> [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless
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