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drmpeg / gr-dvbs2

A DVB-S2 and DVB-S2X transmitter for GNU Radio
GNU General Public License v3.0
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VCM/ACM mode validation #9

Closed staresatscreen closed 3 years ago

staresatscreen commented 3 years ago

Hello there, Can I ask how did you validate the ACM behaviour? I've generated the test stream with the provided flowgraph (dvbs2_tx.grc). I've managed to detect physical frames and descramble them, but pilots are still spread across all quadrants; while they're expected in first quadrant only. Thank you!

drmpeg commented 3 years ago

It's been validated with hardware receivers. Specifically the Novra S300V and Digital Devices Max SX8 (and the Ayecka SR-1 for the DVB-GSE flow graph).

As for the pilots, they're scrambled too. Perhaps you're not accounting for that. Also, the PL header is PI/4 BPSK modulated, so you'll see those symbols in all four quadrants.

staresatscreen commented 3 years ago

OK, thank you for the information!