Re: [Discuss-gnuradio] OFDM GRC block attempt

[Josh Blum]

I reimplemented the packet modulator/demodulator in GRC, and updated the 
 packet_mod_demod.grc.xml example. The packet modulator can be used 
interchangeably with the gmsk, psk, and qam modulators (same for demod).

See PacketModHelper and PacketDemodHelper in 
http://gnuradio.org/trac/browser/grc/trunk/src/SignalBlockDefs/Packet.py

Here is a screen shot of the example that may help explain what I was 
talking about, and why: 
http://www.joshknows.com/tmp/packet_mod_demod.grc.xml.png

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I suppose that until m-blocks come around, these packet blocks in grc 
are the only way a user can actually use a gmsk, psk, or qam de/modulator.

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I will add the ofdm mod/demod, once its hier2 version is merged. The 
ofdm modulator will be implemented in a similar manner: GRC will have a 
ofdm wrapper block that reads from a message source and calls 
ofdm_mod.send_pkt. (I do this so that the output of any block in grc can 
be used with the ofdm_mod block). Again: similar story with ofdm demod.

-Josh