Re: [Discuss-gnuradio] OFDM GRC block attempt

[Dev Ramudit]

Josh Blum wrote:
> 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
> 

Thanks! GRC has been a huge help for our development/testing efforts.

> 
> 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.
> 
> ----
> 
> 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.
> 

I'm still not entirely sure what the difference between the hier and
hier2 versions are? Is there anywhere that discusses this? I've checked
the wiki and the mailing list with no results.

Thanks,
Dev