RE: stds-802-16: OFDM vs. Other Waveforms
Hi all
It will be a good Idea for you if you will start your study in the DVB web
site.
They are talking on 100 Km ranges, delay spread that can go up to 50 us (250
us GI), Fixed and mobile, LOS and NLOS,
data rates close to 32 mbps in 8 MHz channel spacing and more.... there is a
proven system with about one millions users in UK.
All the best
Zion Hadad
Runcom
-----Original Message-----
From: owner-stds-802-16@majordomo.ieee.org
[mailto:owner-stds-802-16@majordomo.ieee.org]On Behalf Of Mark McHenry
Sent: Tuesday, July 03, 2001 4:16 AM
To: stds-802-16@ieee.org
Subject: stds-802-16: OFDM vs. Other Waveforms
1) Does anyone have any measured data or know of published papers that
proves that the OFDM waveform performs better than other waveforms (with a
good equalizer) in heavy multipath situations in either fixed and mobile,
broadband, 500 m to 15 km long, terrestrial links? Several people have told
us that with a good equalizer, "conventional" waveforms such as QPSK obtain
nearly the same performance level but at a lower hardware cost.
2) Is there a "generally excepted" simulated propagation test case that we
could use for a side-by-side comparison of OFDM waveforms compared to
conventional waveforms? I have heard that service providers have test cases
that they use to rate modem performance.
Thanks,
--Mark
Mark McHenry
Shared Spectrum Company
8012 Birnam Wood Drive
McLean, Virginia 22102
mmchenry@sharedspectrum.com
Voice: 703-761-2818
FAX: 703-761-2818