[opendtv] Re: Daily Wireless - Wi-LAN's W-OFDM full mobility
- From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Thu, 5 Aug 2004 16:25:59 -0400
> IEEE 802.16 was originally conceived as a fixed LMDS/MMDS
> system, providing a lot of options for link layers and for
> media access techniques, and operating in wide 20, 25, or
> 28 MHz channels in the 10 to 66 GHz bands.
Oh, also the 2 to 11 GHz bands. So they're within their
range at 5.8 GHz. Sorry about that.
The rest still holds, though.
> It appears they are providing 32 Mb/s, meaning the
> modulation must be QPSK in a 20 MHz channel. And
> therefore 1.6 b/s/Hz spectral efficiency.
>=20
> So why is this so impressive? If they create a
> cellular system out of this, with even coverage,
> haven't they just clobbered the spectrum used
> by 802.11a in the entire area they want to cover?
>=20
> Bert
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