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[Discuss-gnuradio] problems with benchmark_ofdm and N210
From: |
Morgan Redfield |
Subject: |
[Discuss-gnuradio] problems with benchmark_ofdm and N210 |
Date: |
Mon, 6 Jun 2011 17:33:10 -0700 |
Hi Everyone,
I've been playing around with GNURadio and a couple of USRPs lately,
but I've run into some problems. I'm using a modified version of the
benchmark_ofdm_tx.py and benchmark_ofdm_rx.py scripts. I updated them
to use uhd, and I'm using them with two N210s. Each N210 has a WBX
daughterboard, and they're placed about a meter apart right now.
I'm attempting to send data from one USRP to the other, but using
tunnel.py or the benchmark_ofdm files doesn't seem to work. I never
receive any packets correctly.
With the benchmark_ofdm files, if I start receiving before I start
transmitting then I just get TIMEOUTs. If I start transmitting before
I start receiving, I get the following:
$ python benchmark_ofdm_rx.py -f 650M -v --rate=1M
Mac OS; GNU C++ version 4.0.1 (Apple Inc. build 5490); Boost_104601;
UHD_003.001.000-4eb4025
-- Opening a USRP2/N-Series device...
-- Current recv frame size: 1472 bytes
-- Current send frame size: 1472 bytes
-- mboard0 is MIMO master
>>> gr_fir_ccf: using SSE
>>> gr_fir_fff: using SSE
OFDM Demodulator:
Modulation Type: bpsk
FFT length: 512
Occupied Tones: 200
CP length: 128
ok: False pktno: 21611 n_rcvd: 1 n_right: 0
ok: False pktno: 43626 n_rcvd: 2 n_right: 0
ok: False pktno: 21611 n_rcvd: 3 n_right: 0
ok: False pktno: 37548 n_rcvd: 4 n_right: 0
ok: False pktno: 21909 n_rcvd: 5 n_right: 0
ok: False pktno: 4473 n_rcvd: 6 n_right: 0
ok: False pktno: 27253 n_rcvd: 7 n_right: 0
ok: False pktno: 38378 n_rcvd: 8 n_right: 0
ok: False pktno: 21909 n_rcvd: 9 n_right: 0
ok: False pktno: 38486 n_rcvd: 10 n_right: 0
ok: False pktno: 54634 n_rcvd: 11 n_right: 0
ok: False pktno: 21909 n_rcvd: 12 n_right: 0
ok: False pktno: 39158 n_rcvd: 13 n_right: 0
ok: False pktno: 27237 n_rcvd: 14 n_right: 0
ok: False pktno: 42410 n_rcvd: 15 n_right: 0
ok: False pktno: 21909 n_rcvd: 16 n_right: 0
ok: False pktno: 21994 n_rcvd: 17 n_right: 0
ok: False pktno: 21652 n_rcvd: 18 n_right: 0
ok: False pktno: 21097 n_rcvd: 19 n_right: 0
ok: False pktno: 43626 n_rcvd: 20 n_right: 0
ok: False pktno: 21909 n_rcvd: 21 n_right: 0
TIMEOUT
TIMEOUT
I think those timeouts at the end there are from when the transmitter
stopped transmitting data. It looks like I'm receiving a few packets
(far fewer than I should), and all the packets I do receive are not
correct.
Does anyone have any idea what's causing this?
Thanks
Morgan
- [Discuss-gnuradio] problems with benchmark_ofdm and N210,
Morgan Redfield <=
- Re: [Discuss-gnuradio] problems with benchmark_ofdm and N210, Tom Rondeau, 2011/06/07
- Re: [Discuss-gnuradio] problems with benchmark_ofdm and N210, Morgan Redfield, 2011/06/07
- Re: [Discuss-gnuradio] problems with benchmark_ofdm and N210, Tom Rondeau, 2011/06/07
- Re: [Discuss-gnuradio] problems with benchmark_ofdm and N210, Morgan Redfield, 2011/06/07
- Re: [Discuss-gnuradio] problems with benchmark_ofdm and N210, Tom Rondeau, 2011/06/07
- Re: [Discuss-gnuradio] problems with benchmark_ofdm and N210, Morgan Redfield, 2011/06/08
- Re: [Discuss-gnuradio] problems with benchmark_ofdm and N210, Morgan Redfield, 2011/06/08
- Re: [Discuss-gnuradio] problems with benchmark_ofdm and N210, Tom Rondeau, 2011/06/08
- Re: [Discuss-gnuradio] problems with benchmark_ofdm and N210, Marcus D. Leech, 2011/06/08
- Re: [Discuss-gnuradio] problems with benchmark_ofdm and N210, Morgan Redfield, 2011/06/09