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From: | Nikos Balkanas |
Subject: | Re: [Discuss-gnuradio] benchmark_tx and rx : too many FALSE packet |
Date: | Sun, 13 Mar 2016 11:41:17 +0200 |
I experimented variety modulation schemes and GMSK, BPSK, QPSK modulation worked wellHi all.I'm using benchmark_tx(rx).py exampleHowever, when I used QAM modulation, most of received packet were corrupted (FALSE)ENV)both TX and RX uses USRP N210 with ANT500 and CBX 40MHzdistance between TX and RX is shorter than 3mTX)./benchmark_tx.py -f 1.5G -m qam -S 8 --tx-gain=30RX)./benchmark_rx.py -f 1.5G -m qam -S 8RESULTS 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.
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