RACH scan

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Johann T. johann.tzt at gmail.com
Fri Mar 5 15:48:18 UTC 2021


Hi,

I have made some captures on the L-band uplink channels and tried to decode
the RACH messages. All four consecutive TCH channels (according to the spot
beam) were recorded and a call was made during the recording.

I am using the GRC block gmr_rach_scan.grc. I have removed the IQ swap from
the graph, as suggested in the mailing list. The sampling rate and
samples-per-symbol values have  been set to 93.6k and 4, respectively.

It ran fine without any errors, but I couldn't see any results either on
the wireshark or under /tmp/rach.txt.

Maybe I overlooked something here. Any ideas or remarks?

Many thanks,
Johann
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