On Tue, Aug 28, 2012 at 3:52 PM, Eric Cottrell wrote:
> Hello,
>
> This looked interesting since the voice codec will do P25, DMR, and D*. So I
> bought one and should have it in a couple of days.
>
> http://www.dvsinc.com/products/usb_3k.htm
>
> 73 Eric
Neat. Let us know what you find.
Tom
_
Sorry for the confusion. We are trying to synchronize 3 usrps for collect.
The devices seem to be time aligned in that the samples are timestamped
with the same metadata, so we believed that synchronization had been
achieved. However, when the data collected from the usrps was correlated,
samples t
> I have not yet used stream tags, and have a number of
> questions:
>
> 1. Is it possible to get timetags for every sample? My
>readings on time tags seemed to imply that only one
>is created at the beginning of a stream.
>
Your block will need to grab a hold of the last time tag that
On 08/28/2012 01:39 PM, Anisha Gorur wrote:
> Thats actually what we are using, however, when printing out the tick
> count, we randomly, and only sometimes, see a jump of about 30 ticks, and
> if each tick is 10ns, that is a huge 300ns jump. Do you know why this could
> be happening?
>
I'm ver
I'm starting up on another R&D project using GnuRadio.
The project is a transponder, used by NASA for ranging.
It uses DSSS on both the uplink and the downlink. The
transponder has to be coherent, and it synchronizes the
PN epochs of the received uplink and the transmitted downlink.
This allows
I have the next code working, in the firsts seconds I have erroneous
bits, after 10 seconds I don't have any error... another thing if I put
Max Number of Output = 0 always have a ber of 40%...
Umbrella_encodconv_vff::Umbrella_encodconv_vff (const std::vector
&val1, int val2, int val3)
:
Thats actually what we are using, however, when printing out the tick
count, we randomly, and only sometimes, see a jump of about 30 ticks, and
if each tick is 10ns, that is a huge 300ns jump. Do you know why this could
be happening?
We are using gpsdo's as both a time and clock reference, though
On 08/28/2012 12:03 PM, Anisha Gorur wrote:
> Hello,
> We've been having some trouble with the synchronizing aspects of our
> project. What we want is the exact same time as the FPGA tick counter, not
> a time_spec_t representation of time. Where can we get access to that?
> Thanks!
> -Anisha
>
Hello,
This looked interesting since the voice codec will do P25, DMR, and D*. So I
bought one and should have it in a couple of days.
http://www.dvsinc.com/products/usb_3k.htm
73 Eric
___
Discuss-gnuradio mailing list
Discuss-gnuradio@gnu.org
https:
Hello,
We've been having some trouble with the synchronizing aspects of our
project. What we want is the exact same time as the FPGA tick counter, not
a time_spec_t representation of time. Where can we get access to that?
Thanks!
-Anisha
___
Discuss-gnura
On 08/28/2012 07:02 AM, Muhammad JUNAID wrote:
> i want to make MIMO on 2X USRP2 GRC is attached, i got this error...
>
> linux; GNU C++ version 4.6.3; Boost_104601; UHD_003.004.002-34-stable
>
> -- Opening a USRP2/N-Series device...
> -- Current recv frame size: 1472 bytes
> -- Current send fr
On 08/28/2012 12:19 AM, Pan, Luyuan wrote:
> Hello,
> I want to implement a MIMO system using USRP2, I just have USRP2s and
> MIMO cable.
> 1. Do I have to use an external clock source ?
No. With the mimo cable, you can share a clock reference between a pair
of devices
> 2. I searched the maill
i want to make MIMO on 2X USRP2 GRC is attached, i got this error...
linux; GNU C++ version 4.6.3; Boost_104601; UHD_003.004.002-34-stable
-- Opening a USRP2/N-Series device...
-- Current recv frame size: 1472 bytes
-- Current send frame size: 1472 bytes
Using Volk machine: sse4_2_32
Floating poi
On Mon, Aug 27, 2012 at 7:07 AM, Qing Yang wrote:
> Hi there,
>
> I am currently doing a OFDM transceiver project based on RawOFDM. We want to
> implement 20MHz bandwidth transmit/receive, but the RawOFDM code seems to
> support only narrow band (<1MHz). Once I set the sample-rate larger than
> 1M
On Tue, Aug 28, 2012 at 4:21 AM, Qing Yang wrote:
> Hi everyone,
>
> Where can I find a concrete example on how to profile the gnuradio code in
> Python?
>
> My PC is Linux 2.6.35-32-generic-pae #67-Ubuntu SMP Mon Mar 5 21:23:19 UTC
> 2012 i686 GNU/Linux. I use Ubuntu 10.10 and Xeon W3530.
>
> I c
Awesome, thanks Josh - I'll give this a try tomorrow!
On Thu, Aug 23, 2012 at 9:55 AM, Josh Blum wrote:
>
>
> On 08/22/2012 06:11 AM, Michael Hill wrote:
> > Thanks Josh,
> >
> > I've still been toying with this though.. and aren't really having any
> > success.
> > E.g. if I pick a Tx bandwidth
Hi everyone,
Where can I find a concrete example on how to profile the gnuradio code in
Python?
My PC is Linux 2.6.35-32-generic-pae #67-Ubuntu SMP Mon Mar 5 21:23:19 UTC
2012 i686 GNU/Linux. I use Ubuntu 10.10 and Xeon W3530.
I can use Kcachegrind to profile code written in C++. But when I prof
Hello,
I want to implement a MIMO system using USRP2, I just have USRP2s and
MIMO cable.
1. Do I have to use an external clock source ?
2. I searched the maillist and found: Each USRP2 can handle 1 antenna
with most daughterboards, or 2 if you
have your own external RF sections connected to the USR
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