Could anyone try to this example commend ? example code location = gnuradio/gr-digital/example/narrowband Tx) ./benchmark_tx.py -f 1.5G -m qam -S 8 Rx) ./benchmark_rx.py -f 1.5G -m qam -S 8
Thanks. 2016-03-13 18:57 GMT+09:00 SangHyuk Kim <tkdgur7...@gmail.com>: > 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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