For your amusement and consternation here are my latest thoughts on doing an
OFDM protocol.
Symbol rate: 62.5 Hz(128 samples @ 8000 Hz)
Guard interval: 2, 4, 8 ms adaptive to conditions
Subchannels: 8 (62.5 125 187.5 250 312.5 375 437.5 500)
Bandwidth: 437.5 Hz
Raw BPS: 1778, 1600, 1333
with higher-frequency subcarriers.
73,
John
KD6OZH
- Original Message -
From: Rud Merriam
To: digitalradio@yahoogroups.com
Sent: Wednesday, October 24, 2007 10:03 UTC
Subject: [digitalradio] OFDM Proposal: Details
For your amusement and consternation here are my latest
John,
Are there any cases where any of the current amateur radio digital modes
do not use differential keying?
Based on your comments on 8PSK, is this why it is the base waveform used
in the MIL-STD/FED-STD/STANAG modems?
What is your view on single tone modems as used in those standards vs.
-
From: Rick
To: digitalradio@yahoogroups.com
Sent: Thursday, October 25, 2007 02:23 UTC
Subject: Re: [digitalradio] OFDM Proposal: Details
John,
Are there any cases where any of the current amateur radio digital modes
do not use differential keying?
Based on your comments on 8PSK
-
From: Rud Merriam
To: digitalradio@yahoogroups.com
Sent: Wednesday, October 24, 2007 10:03 UTC
Subject: [digitalradio] OFDM Proposal: Details
For your amusement and consternation here are my latest thoughts on doing an
OFDM protocol.
Symbol rate: 62.5 Hz(128 samples @ 8000 Hz
in the total occupied bandwidth.
73,
John
KD6OZH
- Original Message -
From: Rud Merriam
To: digitalradio@yahoogroups.com
Sent: Thursday, October 25, 2007 03:48 UTC
Subject: RE: [digitalradio] OFDM Proposal: Details
John,
One more time, thanks. A lot to mull over in your
