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[Discuss-gnuradio] D8PSK Receiver with USRP1s


From: Smith L.
Subject: [Discuss-gnuradio] D8PSK Receiver with USRP1s
Date: Mon, 1 Feb 2010 10:13:44 -0800 (PST)

Hi all,

I am using benchmark_tx.py and benchmark_rx.py with USRP1. I am using d8psk
as the modulation scheme. Initially I was not able to receive any packets.
So I looked up the mailing list and found a patch for gr_mpsk_receiver_cc.cc
and some information about the parameters --costas and --gain-mu. I made
those changes and ran the above program again and was able to receive all
the packets but none of them were decoded correctly. I have tried it many
times using different data rates. I am using the latest GNURadio revision
fcf9efa7. I would appreciate if someone who has been able to receive the
packets correctly using d8psk can help me.

I was also wondering when the demodulation block for qam would be added to
the GNURadio revision.

Thanks,
Smith 
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