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[Discuss-gnuradio] Differential QPSK modulation details
From: |
irene159 |
Subject: |
[Discuss-gnuradio] Differential QPSK modulation details |
Date: |
Fri, 16 May 2008 07:59:18 -0700 (PDT) |
Hello,
I am using blks2impl dqpsk modulator/demodulator.
Focusing on the qpsk demodulator:
Since "samples_per_symbol" value must be an integer >=2 and USRP samples at
64 Msamples/s with a 2^(n) possible decimation, if I have a 2100 kbps
carrier (=1050 ksym/s) :
- How can I possibly obtain a correct "samples_per_symbol" value?
- Do I need a resampler and if so, how should I use it?
By the way, I might be wrong but I haven't seen were the Costas loop and
time recovery are implemented in this file...
Regards,
Irene
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