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From: | Ron Economos |
Subject: | Re: [Discuss-gnuradio] DVB-T Receiver in Raspberry Pi 3 and RTL-SDR |
Date: | Sat, 22 Apr 2017 06:58:46 -0700 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 |
I second the suggestion to just use the RTL-SDR dongle in it's original role as a DVB-T receiver. However, since you're sending DVB-T with another SDR (the B210) you could send non-standard narrow band DVB-T. For example, you could send 1 MHz wide DVB-T with a sample rate
of 1.142857 Msps (8 / 7 Msps). Or you could send DVB-T at a sample
rate that's known to work well with the RTL-SDR. Even 1 MHz wide DVB-T would support 3.9 Mbps with 64QAM and 7/8 code rate. Enough for HD with H.264 video. Unfortunately, the GNU Radio DVB-T receiver is a bit of a CPU hog. So even narrow band DVB-T may be too much for the RPi3. Here's a DVB-T bit-rate calculator. It takes integer bandwidths as input (normally 6, 7 and 8), but could be modified for any sample rate. https://github.com/drmpeg/dtv-utils/blob/master/dvbtrate.c Ron On 04/22/2017 06:33 AM, Marcus Müller
wrote:
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