git-artes
commented
4 years ago Hi. You should try running the demos with the provided recorded signals (see the files at https://iie.fing.edu.uy/investigacion/grupos/artes/projects/gr-isdbt/, there's one with a dongle recording). Once you've gotten familiar with that, you may try using the system with an over-the-air reception. However, note that you have to find the correct parameters first (i.e. the mode, CP, etc.). See the obtaining_the_parameters.grc flowgraph.
In the project's website there are some documents in spanish that explain the whole process. best
Hi, I'm trying to run the rx_1srg_demo on the non-tested 3.8 version of the gr-isdbt module, I'm actually not sure if I'm doing something wrong I just need some assistance on the topic.
Once I run the example gnuradio starts receiving a data stream and then it freezes (the terminal does keeps running), I'm kinda new on the topic so I don't know if that's supposed to happen, also I try running ffplay to see the converted data on a video stream but nothing is showing.
Here's a piece of what the terminal is showing:
Error: failed to enable real-time scheduling. gr-osmosdr 0.2.0.0 (0.2.0) gnuradio 3.8.1.0 built-in source types: file osmosdr rtl rtl_tcp uhd hackrf bladerf rfspace airspy soapy redpitaya [INFO] [UHD] linux; GNU C++ version 7.5.0; Boost_106501; UHD_3.15.0.0-7-g8d228dbe Using device #0 Realtek RTL2838UHIDIR SN: 00000001 Found Rafael Micro R820T tuner [R82XX] PLL not locked! Exact sample rate is: 1015873.002204 Hz [R82XX] PLL not locked! Segments: 1 d_noutput: 384 gr::buffer::allocate_buffer: warning: tried to allocate 348 items of size 188. Due to alignment requirements 1024 were allocated. If this isn't OK, consider padding your structure to a power-of-two bytes. On this platform, our allocation granularity is 4096 bytes. gr::buffer::allocate_buffer: warning: tried to allocate 321 items of size 204. Due to alignment requirements 1024 were allocated. If this isn't OK, consider padding your structure to a power-of-two bytes. On this platform, our allocation granularity is 4096 bytes. gr::buffer::allocate_buffer: warning: tried to allocate 321 items of size 204. Due to alignment requirements 1024 were allocated. If this isn't OK, consider padding your structure to a power-of-two bytes. On this platform, our allocation granularity is 4096 bytes. previous_symbol: 0, current_symbol: 3 d_corr_sp = {3.236742, 4.574428, 3.136580, 8.024161} OFDM_SYNCHRO: peak at border! peak 0.000016, avg_max 0.000025, avg_min -0.009879, peak_index: 15 OFDM_SYNCHRO: peak at border! peak 0.000478, avg_max 0.000433, avg_min -0.008460, peak_index: 1022 VITERBI: d_init=True OFDM_SYNCHRO: peak under/over average! peak -0.008831, avg_max 0.000474, avg_min -0.013260 OFDM_SYNCHRO: peak at border! peak -0.008831, avg_max 0.000474, avg_min -0.013260, peak_index: 15 previous_symbol: 0, current_symbol: 3 d_corr_sp = {3.382313, 2.872745, 4.091533, 5.052872} OFDM_SYNCHRO: peak under/over average! peak -0.008009, avg_max 0.000429, avg_min -0.009520 OFDM_SYNCHRO: peak at border! peak 0.000332, avg_max 0.000342, avg_min -0.010759, peak_index: 1023 previous_symbol: 3, current_symbol: 3 d_corr_sp = {6.834692, 3.271213, 3.314949, 11.358335} OFDM_SYNCHRO: peak at border! peak -0.000212, avg_max -0.000145, avg_min -0.011191, peak_index: 15 previous_symbol: 3, current_symbol: 2 d_corr_sp = {2.373575, 3.242822, 6.079180, 2.500492} OFDM_SYNCHRO: peak under/over average! peak -0.008780, avg_max 0.000663, avg_min -0.011252 previous_symbol: 2, current_symbol: 0 d_corr_sp = {10.053485, 2.428819, 2.496308, 5.088914} OFDM_SYNCHRO: peak under/over average! peak -0.007923, avg_max 0.000249, avg_min -0.011654 OFDM_SYNCHRO: peak at border! peak -0.007923, avg_max 0.000249, avg_min -0.011654, peak_index: 15 previous_symbol: 0, current_symbol: 0 d_corr_sp = {7.159842, 6.194774, 2.898567, 3.581966} OFDM_SYNCHRO: peak under/over average! peak -0.010274, avg_max 0.000373, avg_min -0.012451 OFDM_SYNCHRO: peak under/over average! peak -0.003635, avg_max 0.000373, avg_min -0.010749 OFDM_SYNCHRO: peak at border! peak -0.003635, avg_max 0.000373, avg_min -0.010749, peak_index: 1 previous_symbol: 0, current_symbol: 2 d_corr_sp = {4.634711, 3.504941, 9.641738, 2.182652} OFDM_SYNCHRO: peak under/over average! peak -0.009325, avg_max 0.000509, avg_min -0.011365 OFDM_SYNCHRO: peak at border! peak -0.009325, avg_max 0.000509, avg_min -0.011365, peak_index: 0 OFDM_SYNCHRO: peak under/over average! peak -0.009756, avg_max 0.000642, avg_min -0.008067 previous_symbol: 3, current_symbol: 3
And then it goes of like that until it's killed. The picture is showing what I see on the gnuradio screen