Forum: GNU Radio A GSM rough timing/frequency correction block.

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C369ebbe1655201988e376af57460f23?d=identicon&s=25 Achilleas Anastasopoulos (Guest)
on 2007-06-30 09:45
(Received via mailing list)

some time ago I got interested in receiving GSM with GnuRadio.

I attach a block that does rough timing  estimation and frequency
correction based on FCCH blocks.
Just put it in your gr-howto directory and modify and
howto.i accordingly.
Also attached is a python code that I used to test it.

I have not tested it with real data from the usrp yet (no DBSRX db in
the lab), but with some online files (Robert's samples):

I would be interested to hear how the block performs with real-time
data from the usrp.

Next step (if/when I get some time) is to do fine timing estimation
jointly with channel estimation based on the Normal burst training

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