[USRP-users] B210, MIMO Problem
Dear Ettus Technical Support Team,
So far I have been successful getting the UHD C++ APIs to run the USRP B210
both on Linux(Eclipse) and Windows (Microsoft Visual Studio) in their SISO
mode. I have tried further to run the USRP on its both channels.
Unfortunately I have not been successful although trying a lot. In my codes
I try to run the both channel by the following uhd stream.
size_t channel[2] = { 0,1 };;
uhd_stream_args_t stream_args = {
cpu_format = "fc32",
otw_format = "sc16",
args = "",
channellist = channel,
n_channel = 1
};
But when I run the code, only one of the channels captures the signal. When
I run the benchmark_rate example I can run both channel receiving and
sending simultaneously. I have reviewed the source code of the
benchmark_rate code. I have found that in this code have been written
somehow differently maybe by C++ APIs not native C API. I tried to mimic
the code. I ran the example code on your website (click here
https://kb.ettus.com/Getting_Started_with_UHD_and_C%2B%2B) but the
compiler shows a run time exception on the following line of the code:
uhd::usrp::multi_usrp::sptr usrp=uhd::usrp::multi_usrp::make(device_args);
The error is an Access Violation at a specified address of memory.
Furthermore, I tried the srsLTE opensource program, the latest version
in which it supports the transmit diversity scheme(./pdsch_ue -f
186000 -A 2, in the Linux terminal). But when I configure the code
to capture on both channels it only captures on one of them. I would
be thankful if you get me out of this trouble.
Thanks,
Masoud
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[USRP-users] (no subject)
Hi,
I have launched B210 USRP MIMO config. I have problem in transmission on
both Tx channels. However, there is no problem in receiving on both ones.
In transmission on both channels continous Underflows appear in console. It
is independent of the Tx sampling rate. How can I fix the problem?
I have used the following code for initializing the uhd stream.
size_t channel[2] = { 0,1 };;
uhd_stream_args_t stream_args = {
cpu_format = "fc32",
otw_format = "sc16",
args = "",
channellist = channel,
n_channel = 1
};
How can I fix the problem?
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[USRP-users] Dual Tx Transmission Problem
Hi,
I have launched B210 USRP MIMO config. I have problem in transmission on
both Tx channels. However, there is no problem in receiving on both ones.
In transmission on both channels continous Underflows appear in console. It
is independent of the Tx sampling rate. How can I fix the problem?
I have used the following code for initializing the uhd stream.
size_t channel[2] = { 0,1 };;
uhd_stream_args_t stream_args = {
cpu_format = "fc32",
otw_format = "sc16",
args = "",
channellist = channel,
n_channel = 1
};
How can I fix the problem?
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USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
[USRP-users] Fwd: B210, MIMO Tx Streaming Problem
Hi,
I have launched B210 USRP MIMO config. I have problem in transmission on
both Tx channels. However, there is no problem in receiving on both ones.
In transmission on both channels continous Underflows appear in console. It
is independent of the Tx sampling rate. How can I fix the problem?
I have used the following code for initializing the uhd stream.
size_t channel[2] = { 0,1 };;
uhd_stream_args_t stream_args = {
cpu_format = "fc32",
otw_format = "sc16",
args = "",
channellist = channel,
n_channel = 1
};
How can I fix the problem?
___
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USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
[USRP-users] B210 MIMO, 4 Channel s
Hi, Is it possible to boost the number of MIMO channels of B210 by adding multiple USRP B210 devices to the same host? ___ USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
[USRP-users] Run Time Error in Sending MIMO on B210
Dear All, When I transmit on both channels on USRP b210, after some time I receive the following error: terminate called after throwing an instance of 'std::length_error' what(): basic_string::_S_create But, in SISO mode there is no problem. Please help me. Thanks, Masoud ___ USRP-users mailing list USRP-users@lists.ettus.com http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
