Hello All,
I have designed BPSK transmitter and receiver in grc.
But Costas loop can able to correct frequency offset, not phase offset.
Here, I attached both transmitter and receiver files.
Transmitter :
1). File sink contains Bpsk symbols {-1,1} (repeat = yes)
2). Samples per symbol : 20
3). RRC pulse lasts for 2 symbol periods
Receiver :
1). Matched filtering
2). Costas loop & Timing recovery
3). saving samples in File sink
and final Symbols are recovered from the samples in matlab.
I'm using uhd + gnuradio + USRP1 + RFX 2400 daughter boards.
Can somebody suggest me how to deal with Phase offset ?
(especially when the gain of Rx is low phase shifts are happening
frequently)
One more Question : Is Rms value sufficient in SNR Calculation ?
Thanks & Regards
http://old.nabble.com/file/p33763663/Transmitter.grc Transmitter.grc
http://old.nabble.com/file/p33763663/Receiver.grc Receiver.grc
http://old.nabble.com/file/p33763663/Rcvd_data.png Rcvd_data.png
http://old.nabble.com/file/p33763663/Bpsk_data.dat Bpsk_data.dat
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