Hi Glen,

> /* update mean amplitude estimate for LDPC decoder scaling */
> 
>     ofdm->mean_amp = 0.9f * ofdm->mean_amp + 0.1f * sum_amp /
> (ofdm->rowsperframe * ofdm->nc);

Yes, that's used for LDPC decoding so could be related.

It would also be useful to have a repeatable unit test to explore the
issue, e.g. a repeatable fading profile running with the command line
version of the modem.

Cheers,
David




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