hello everyone !
i use benchmark_ofdm_tx to tramsmit data continuously .but in the receiver
side ,i get serveral packets ,then a serial of noisy, and then useful packets
again .the packets seem discontinuously transmitted .i wonder why .
in my program both fusb_nblock and fusb_block_size are
I am trying to write my own module ,"make" ,"make check" and "make install"
are all ok ,but when i use it in my own module ,i get the following error:
ImportError: /usr/loca/lib/python2.6/dist-packages/gnuradio/_mimo.so: undefined
symbol: _Z25mimo_make_ofdm_mapper_bcvRKSt6vectorISt7complexIfESaI
in gr_ofdm_frame_acquisition.cc file ,the coarse frequency compensation is
gr_expj(-2*PI*freq_delta*d_cplen/d_fft_length*symbol_count)
.i don't know why ,could somebody give me an explanation or tell me which
peper i can refer to ?
thanks in advance
__
hello everyone !
i'm testing the benchmark_ofdm modules.i'm using rfx2400 db ,so i set rx and tx
frequency to 2.45G and
in transmitting side i set "--tx-amplitude=1 -s 32" .but i got the
following results,it seems that i have lost most of the packets,why?
ok: True pktno: 1840 n_
hello everyone!
I am learning to make my own block.In gr-howto-write-a-block-3.2/src/lib
directory ,I delete the former .h and .c files ,and write my own .h and .c
files .after modifying the howto.i ,I make and build everything successfullly
.then I chang to the gr-howto-write-a-block-3.2 direc
really appreciate your help
wei在2010-06-03 00:42:52，"Matt Ettus" 写道：
>On 06/01/2010 03:18 AM, weizhongshan wrote:
>> sos!
>> i want to realize a 2*2 mimo simplex communication system .since rfx
>> daughterboards can transmit/receive 2 complex IO signals, i thought
sos!
i want to realize a 2*2 mimo simplex communication system .since rfx
daughterboards can transmit/receive 2 complex IO signals, i thought 2 usrp and
4 rfx_daughterboards is enough for me .but now i am wonfering whether usrp can
transmit/receive multiple signals simultaneously.could somebody
e two
channels should be more or less the same(though they may go through different
shading).but through the graph i find the signal from channel two seems 1/4 λ
ahead of that from channel one在2010-05-31 23:43:54，"Thomas Tsou"
写道：
>2010/5/31 weizhongshan :
>> hello ever
hello every !
i use one usrp to transmit complex gr_sin_wave,and use another two_channel
usrp as the receiver.
i thought the mux should be set to "32103210",but when i did this ,i got
nothing but noisy .then i changed the mux to "33221100",i got the ecpected
orthogonal sin and cos wave .that co
33:56AM +0800, weizhongshan wrote:
>> thanks Eric
>> I am sorry ,I will not do that again .but would you please help me figure
>> out this problem. as I mentioned the USB speed is not a problem.and i have
>> another C++ problem test_usrp ,it's a one channel receiver ,
nk my pc can keep up with the
speed在2010-05-28 02:35:37，"Eric Blossom" 写道：
>On Thu, May 27, 2010 at 05:29:56PM +0800, weizhongshan wrote:
>> hello everyone ,I want to use the fm_tx_2_daughters.py as a template to
>> realize my own module ,so I copy it to my own
hello everyone ,I want to use the fm_tx_2_daughters.py as a template to
realize my own module ,so I copy it to my own folder. but when I set the
interpolate to 64 and test the copy module ,"uU" appears.then I run the
usrp_benchmark_usb.py,the result shows "Max USB/USRP throughput = 32MB/sec".I
hello everyone ,I want to use the fm_tx_2_daughters.py as a template to realize
my own module ,so I copy it to my own folder.
but when I set the interpolate to 64 and test the copy module ,"uU"
appears.then I run the usrp_benchmark_usb.py,the result shows "Max USB/USRP
throughput = 32MB/sec".I
I'm a newer to USRP ,I'm testing the benchmark_ofdm.py module,and find the
last packet is not been received.I wonder why
best wishes
wei
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