It is well know that microwaves, bluetooth, cordless phones are the major
interference sources in 2.4Ghz.
But what devices (with non WiFi standards) are using 5Ghz band used by
802.11n devices?
Specifically for 5180-5350, 5745-5805Mhz.
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synchronized USRPs using MIMO connector.
That is why I am trying to use VRT code.
What I am trying to do is simply synchronize two identical transmitted
packets from two USRPs.
Any better idea?
--
Sangho Oh
732-632-7499
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In the gburadio directory I did:
make unistall
make clean
make distclean
git pull
git checkout master
./configure
Then,. I got following error "config.status: error: cannot find input file:
`omnithread/gnuradio-omnithread.pc.in'"
Anyone knows how to fix it??
--
*
tes of data.
64 bytes from 192.168.10.2: icmp_seq=1 ttl=32 time=3.31 ms
64 bytes from 192.168.10.2: icmp_seq=2 ttl=32 time=0.073 ms
64 bytes from 192.168.10.2: icmp_seq=3 ttl=32 time=0.043 ms
64 bytes from 192.168.10.2: icmp_seq=4 ttl=32 time=0.063 ms
Any idea??
--
*From: Sangho
host/lib
LIBUSB_LIBRARIES (ADVANCED)
linked by target "uhd" in directory /root/git/uhd/host/lib
--
*From: Sangho Oh
*
*Voice mail: (609) 759-1552*
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quot;Done!" << std::endl << std::endl;
3. I don't know what the the proper sample rate is for 802.11 6Mbps data
frame. I set the rate as 6e6 and got following message
Warning:
The hardware does not support the requested TX sample rate:
Target sample rate: 6.00
0 Msps...
Setting device timestamp to 0...
Read data to send from file: in.dat
Number of samples in file: 2560001
Sent 257382 samples
Done!
--
*From: Sangho Oh
*
*Voice mail: (609) 759-1552*
--
*From: Sangho Oh
*
*Voice mail: (609
Hello,
What I am trying to implement is a synchronized packet transmission from
more than one USPRs.
I wonder if there is a way to control the transmission timing under a
microsecond level.
If there is a way to control the transmission timing using external clock
signal, then it will be really ea
te:
>
>
> On 01/02/2011 10:53 AM, Sangho Oh wrote:
> > Hello,
> >
> > What I am trying to implement is a synchronized packet transmission from
> > more than one USPRs.
> > I wonder if there is a way to control the transmission timing under a
> > m
c_t(seconds_in_future);
When is the packet is being transmitted?
I believe md.time_spec specify the delay of transmission, which is not an
absolute time of the transmission.
On Sun, Jan 2, 2011 at 4:08 PM, Josh Blum wrote:
>
>
> On 01/02/2011 12:59 PM, Sangho Oh wrote:
> > Hello Josh,
&
Hello,
If I use rsh from a remote host, gnuradio does not transmit data
with following error in the end.
"Error: std::bad_alloc"
with the rsh script
"rsh r...@gnuradiohost '/root/git/uhd/host/build/examples/tx_waveforms'
I think this is a shell issue, but anyone know how to fix this?
Thanks.
Actually, same result for ssh and rsh.
I have log in and run the script.
Otherwise, (if I run the scrip from remote host) gnuradio transmission does
not work.
- Sangho
On Sun, Jan 9, 2011 at 1:57 PM, Patrick Strasser wrote:
> schrieb Sangho Oh am 2011-01-09 06:39:
> > Hello,
> &g
Hello,
I am trying to use "rx_samples_to_file.cpp" in UHD to save samples received.
UHD seems save samples in complex integer format in c++.
However, it is not possible to read that format from Matlab.
I have checked the Matlab utilities in Gnuradio, but they were not useful.
Is that any simpler wa
ve disk space and IO overhead for large captures or high data
> rates. You will appreciate this if you change the example to output a
> text format.
>
> Good luck,
> -Josh
>
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Hello,
I am using Garmin 18 5Hz PPS clock for USRP synchronization.
This is the GPS: https://buy.garmin.com/shop/shop.do?pID=8631
However, because it is 5Hz PPS not 1Hz, the synchronization looks not
working properly.
I got following message on the time stamp reading after 1 sec.
"Creating the
> On 01/18/2011 05:36 PM, Sangho Oh wrote:
> > Hello,
> >
> > I am using Garmin 18 5Hz PPS clock for USRP synchronization.
> >
> > This is the GPS: https://buy.garmin.com/shop/shop.do?pID=8631
> >
> > However, because it is 5Hz PPS not 1Hz, the synchroniz
I am trying to achieve two synchronized transmissions from two USRP2s.
Both USRPs are connected to each host PC and feed with 5PPS clocks, without
10Mhz reference clock.
But I cannot make it happen yet.
1. I have synchronized two USRP2s using clocks from GPS pps, and wait for 1
sec
* sdev->set_
Hello, I am transmitting 20Mhz OFDM symbols using UHD code.
When I checked the PSD of the received samples using UHD
(rx_samples_to_file)
I found there is a significant difference in PSD between the transmitted and
received signal.
Reception decimation is 4 and I used re-sampled data (4/5) for OFD
Hello,
I have a quick question.
In UHD, is it possible to give a nano second level timing control in
timed_tx samples
sample?
I think that is possible due to the restriction from OS,
but I saw some consistent difference in the transmission when I gave timed
delay as
1.00100, 1.00200, and
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