Hi, Martin Thanks. I will move to the new blocks. But if someone have encountered this kind of problem please let me know.
Regards, - Monika On Wed, Apr 27, 2016 at 9:58 PM, Martin Braun <martin.br...@ettus.com> wrote: > Monika, > > please be patient on this list. Also, the blocks you mention are very > old and not actively developed/maintained. I recommend switching to the > ofdm_tx and ofdm_rx blocks. > > Cheers, > Martin > > On 04/27/2016 04:09 AM, monika bansal wrote: > > Please help me with this. > > > > Thanks. > > > > Regards, > > -monika > > > > On Wed, Apr 27, 2016 at 4:37 PM, monika bansal <monika19...@gmail.com > > <mailto:monika19...@gmail.com>> wrote: > > > > Hi, > > > > I have connected benchmark_tx.py and benchmark_rx.py to make it > > loopback mode without USRPs. There is no channel block between the > > tx and rx chain. > > > > I checked all blocks in the Transmit chain. All are working as > > expected. But in Receiver chain i did not understand the output of > > /ofdm_sync_ml /and /digital.ofdm_sampler / blocks. > > > > I tried checking the output of port 1 of ofdm_sync. The sync signal > > is one on the following indexes: > > * 714, 7109, 13515, 19911, 26308, 32705, 39115, 45515,* > > * 51910, 58315, 64715, 71115, 77515, 83915, 90315, > 96712,* > > * 103115, 109512, 115910, 122315, 128715, 135113, 141510, > 147915,* > > * 154288, 160711, 167112, 173515, 179912, 186315* > > * > > * > > I checked the output of port 1 of ofdm_sampler. The sync signal is > > one on the following indexes: > > *0, 5120, 10752, 15872, 20992, 26112, 31744, 36864,* > > * 41984, 47616, 52736, 57856, 62976, 68096, 73216, > 78336,* > > * 83968, 89088, 94208, 99840, 104960, 110080, 115200, > 120832,* > > * 125952, 131584, 136704, 142336, 147456, 153088* > > * > > * > > *I expected the output of *port 1 of ofdm_sync to be 639, 639+6400, > > 639+12800 , ... > > and output of port 1 of ofdm_sampler to be 0, 5120, 5120*2, 5120*3, > > .... > > > > General parameters are as follows: > > fft_len = 512 > > cp_len = 128 > > occupied_tones = 200 > > modulation = bpsk > > pkt_size = 200 bytes > > after CRC and Header pkt_length = 209 bytes > > 1 sync word for each packet > > > > Finally there will be 10 OFDM symbols per pkt and 512+128 = 640 > > complex symbols per OFDM symbol. > > > > > > > > > > _______________________________________________ > > Discuss-gnuradio mailing list > > Discuss-gnuradio@gnu.org > > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >
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