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From: | Ron Economos |
Subject: | Re: DVB-T receiving |
Date: | Tue, 15 Feb 2022 14:44:13 -0800 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.5.0 |
A couple of things.
1) If you're capturing at 10 Msps, you need to resample to the DVB-T sample rate of 9.142857 Msps. You can do that with a rational resampler block set to interpolation = 64 and decimation = 70.
2) That's not a very good signal. It has a lot of multipath and
poor SNR.
Ron
Hello,
Once again I am asking for some help with the DVB-T functionality of GNU radio.
I am using complex binary files recorded with a USRP at 10 Ms/s. The DVB-T rx example chain can't decode it at all. I have changed every setting according to Hungarian transmit parameters (64QAM, 1/4 GI, 3/4 code rate etc.).
I think the problem might be with symbol acquisition, but cant really confirm my suspicion.
Below you can see the signal I am talking about. Could it be that for this type of synchronization this SNR is not sufficient?
Thanks,
András Szilassi
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