Dear Nikos. the value 'ok' returns 'FALSE' as results of crc_check.
so, I think packet was corrupted. It happened only some modulation using high bits per symbol (QAM, PSK) Thanks 2016-03-13 18:41 GMT+09:00 Nikos Balkanas <nbalka...@gmail.com>: > Have you inspected the packets and verified them to be corrupt? > > BR > Nikos​ > > On Sun, Mar 13, 2016 at 10:22 AM, SangHyuk Kim <tkdgur7...@gmail.com> > wrote: > >> Hi all. >> >> I'm using benchmark_tx(rx).py example >> >> I experimented variety modulation schemes and GMSK, BPSK, QPSK modulation >> worked well >> >> However, when I used QAM modulation, most of received packet were >> corrupted (FALSE) >> >> ENV) >> both TX and RX uses USRP N210 with ANT500 and CBX 40MHz >> distance between TX and RX is shorter than 3m >> >> TX) >> ./benchmark_tx.py -f 1.5G -m qam -S 8 --tx-gain=30 >> >> RX) >> ./benchmark_rx.py -f 1.5G -m qam -S 8 >> >> RESULTS ON RX) >> ok = FALSE pktno = 1 n_rcvd = 1 n_right = 0 >> ok = FALSE pktno = 2 n_rcvd = 2 n_right = 0 >> ok = FALSE pktno = 3 n_rcvd = 3 n_right = 0 >> ... >> ok = TRUE pktno = N n_rcvd = N n_right = 1 >> ... >> >> Is this normal case of qam modulation ? >> How can I get more TRUE packet using QAM modulation ? >> >> Thanks. >> >> _______________________________________________ >> Discuss-gnuradio mailing list >> Discuss-gnuradio@gnu.org >> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >> >> >
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