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Re: [Discuss-gnuradio] DVB-T Reception Problem

From: Ron Economos
Subject: Re: [Discuss-gnuradio] DVB-T Reception Problem
Date: Wed, 16 Dec 2015 05:05:32 -0800
User-agent: Mozilla/5.0 (X11; Linux i686; rv:24.0) Gecko/20100101 Thunderbird/24.6.0

Something that you can try is to use the OFDM synchronization block from gr-isdbt.


Just replace the gr-dvbt ofdm_sym_acquisition block with the one from gr-isdbt. Leave the freq. error output unconnected.

I believe German DVB-T is 16QAM 2/3 rate, so your captured signal should be at least 12 dB to 15 dB above the noise, preferably more.

Also, since you're using a B210, you can use the correct DVB-T sample rate of (8,000,000 * 8) / 7 Msps (instead of 10 Msps) and delete the rational resampler block in the flow graph.


On 12/16/2015 04:29 AM, address@hidden wrote:
Hello all,

I am trying to receive a DVB-T signal which I have recorded using a USRP
B210.I have set all parameters correctly but I am unable to receive the
output stream. I already verified that I have a spike at 746MHz which is
the frequency of my broadcast station.i think the problem is with the
synchronization. I am getting restart aquisition as my grc output
continously. There are some messages before as well which I have attached
as a screenshot. Anyone who could check where the error is? Thanks all
very much.


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