[Discuss-gnuradio] OFDM implementation

[Tom Rondeau]

Just the status report from the work done the past couple of weeks on 
OFDM. With Matt Ettus, Bob McGwier, and Eric Blossom, we successfully 
transmitted and received OFDM over the air with BPSK, QPSK, and 16QAM. I 
have merged the code into the trunk so others can use it, though I 
currently restricted the subcarrier modulations to use only BPSK or QPSK 
(M-QAM will be coming soon I hope). It's not complete; specificially, it 
lacks an adaptive equalizer over the entire packet and channel coding. 
Other features should be coming over time, too.

If you're interested, and for the good of the community, I have posted 
the presentation I gave last week to the address@hidden Symposium about the 
implementation details of the system. This includes the block-diagram 
representations of the flow graphs for the transmitter, receiver, and, 
most importantly, the synchronizers used in the system. I have made it 
available in both PPT and PDF format (the PPT opens just fine in the 
latest version of Open Office for those without MS Office). You can find 
it under the Presentations link on the front page of Trac (Johnathan, 
Eric, if you have a better place to put this kind of information, let me 
know; this seemed like a good place to start).

Tom