|Subject:||Re: [Discuss-gnuradio] Impulse response in DVB-T, someboby knows how to calculate?|
|Date:||Sun, 2 Oct 2016 12:35:36 -0700|
|User-agent:||Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.3.0|
Just a reminder that the gr-dvbt project is now part of GNU Radio in the gr-dtv component and the Digital Television category of gnuradio-companion. The DVB-T receiver has some significant bug fixes and enhancements over the baseline in gr-dvbt.
The C in COFDM stands for "coded". In the case of DVB-T, Viterbi and Reed-Solomon FEC.
The impulse response of a channel is really a separate topic from DVB-T, so I'll let others comment on that. A quick Google of "channel impulse response" provides a starting point.
On 10/02/2016 11:40 AM, Cinaed Simson wrote:
On 10/01/2016 04:46 PM, Juan Antonio wrote:Hello, someone would know how to calculate the impulse response of a COFDM, DVB-T channel with an SDR device? Thank you in advance _______________________________________________ Discuss-gnuradio mailing list address@hidden https://lists.gnu.org/mailman/listinfo/discuss-gnuradioAn inverse DFT on a sinc function in the frequency domain yields a sine function in the time domain. And a DFT on the sine function in the time domain yields a sinc function in the frequency domain. I presume the "C" in COFDM means to chop up the bandwidth into carriers such that the sinc function in one channel hits nulls in the other channels. Piece of cake in theory. There's a gr-dvbt project on github https://github.com/BogdanDIA/gr-dvbt I don't know anything about it - I don't even know if it works. -- Cinaed _______________________________________________ Discuss-gnuradio mailing list address@hidden https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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