All,
We are working on a cognitive radio project, and are contemplating on
using the USRP as our platform. However, we have strict timing
requirements in our MAC design. We understand that the USRP2 has a much
more capable FPGA compared to USRP1.
What we would like to know from the community is:
My blocks are connected as such,
self.connect(self.u, head_left)
self.connect(self.u, head_right)
self.connect(tail_left, (audio_sink, 0))
self.connect(tail_right, (audio_sink, 1))
There is a pipeline which connect head to tail, which takes care of
getting the two different fr
Hi,
Hardware: USRP2, Tuner Card
I am trying to run a FM receiver to receiver a FM station on my right
speaker and another on my left speaker.
Im able to do this successfully.
However when I integrate this function into a GUI interface to display the
fft being received, my FM audio has lots of ji
On Thu, Oct 8, 2009 at 5:19 PM, Jonathan P Jacky wrote:
>
> I am building from gnuradio-3.2.2.tar from Trac on an iMac9,1 with an
> Intel Core 2 Duo running Mac OS X 10.6.1 (Snow Leopard), XCode version
> 3.2, gcc version 4.2.1.
>
> I am following the directions at
> https://radioware.nd.edu/docum
FM Radio Demodulation (I know there are FM tutorials out there, but
none using grc):
The examples are lacking, but we definitely have this one:
http://gnuradio.org/cgit/gnuradio.git/tree/grc/examples/usrp/usrp_wbfm_receive.grc
* Including wideband samples of lots of FM signals (Multiple si
Gnuradio is really cool, but it is not that useful without the USRP
(or some other hardware) To a lot of experimenters and beginners and
students, ~$700 (plus daughter cards) is a lot of money to tinker.
What makes it really neat of course is grc.
As easy to use as grc is, it still is not easy eno
I am building from gnuradio-3.2.2.tar from Trac on an iMac9,1 with an
Intel Core 2 Duo running Mac OS X 10.6.1 (Snow Leopard), XCode version
3.2, gcc version 4.2.1.
I am following the directions at
https://radioware.nd.edu/documentation/install-guides/mac-os-x
and just got all the prerequisites
Hi Douglas,
Thank you for your reply. I try to find examples for in-band signaling.
However, I don't see examples in the gnuradio-3.2.2. It seems that the
in-band signaling is on going work. I try to use the existing gnuradio code to
achieve what I want. I have tried everything I can do to
Hi All,
I've been having problems sending a 25 Msym/s BPSK stream between two
USRP2's with XCVR2450 daughterboards. I've tracked it down to the Rx
circuitry limiting the passband to ~14 MHz when at least 20 MHz should
be available.
Sifting through the db_xcvr2450.c/db_xcvr2450.cc files, I th
George,
You were talking about using m-blocks, along with doing more processing on
the USRP (matched filter + dependent packet generator) in the FPGA, correct?
The basic functionality of m-blocks is to be integrated into the main API
as I understand (in a modified form perhaps?), and they do stil
On Thu, Oct 8, 2009 at 1:50 PM, Jane Chen wrote:
> Hi all,
>
> I would like to send a MAC layer control packet every 4 ms from computer A
> to computer B to tell B when to send data using USRP and GNU Radio. It is
> like TDMA and a frame is 4 ms. I am trying to do this work by modifying
> tunnel
Hi all,
I would like to send a MAC layer control packet every 4
ms from computer A to computer B to tell B when to send data using USRP
and GNU Radio. It is like TDMA and a frame is 4 ms. I am trying to do
this work by modifying tunnel.py in the gnuradio-example folder. I
removed the carry sensin
Matt Ettus wrote:
Christian Meier wrote:
Hi,
I noticed that there is a hardcoded "`define NOCORDIC_TX" inside
tx_chain.v
Does anyone know why this is disabled?
Is it a problem of FPGA size or are there any bugs inside tx_chain
with NOCORDIC_TX not defined?
Ignore my last answer. We use t
Hi all,
I would like to send a MAC layer control packet every 4 ms from computer A
to computer B to tell B when to send data using USRP and GNU Radio. It is
like TDMA and a frame is 4 ms. I am trying to do this work by modifying
tunnel.py in the gnuradio-example folder. I removed the carry sensin
Christian Meier wrote:
Hi,
I noticed that there is a hardcoded "`define NOCORDIC_TX" inside tx_chain.v
Does anyone know why this is disabled?
Is it a problem of FPGA size or are there any bugs inside tx_chain with
NOCORDIC_TX not defined?
Ignore my last answer. We use the RX cordic. The TX
Christian Meier wrote:
Hi,
I noticed that there is a hardcoded "`define NOCORDIC_TX" inside tx_chain.v
Does anyone know why this is disabled?
Is it a problem of FPGA size or are there any bugs inside tx_chain with
NOCORDIC_TX not defined?
That is commented out. We use the CORDIC.
Matt
Mattias Kjellsson wrote:
Hi list,
I have two question regarding slicer_45deg(gr_complex sample) defined in
gr_clock_recovery_mm_cc.
What is it, and why is it there? Does it have something to do with
bpsk/qpsk, similar to what has been implemented for the phase- detector
in gr_costas_loop_cc? I'
Hi once more,
I am currently writing a patch that reactivates the disabled and out of
date integration of the tx cordic inside FPGA.
If this works and fits into the FPGA, I plan to use it for getting more
tx and rx channels over the same daugtherboard with different baseband
offsets.
For this t
Hi list,
I have two question regarding slicer_45deg(gr_complex sample) defined in
gr_clock_recovery_mm_cc.
What is it, and why is it there? Does it have something to do with
bpsk/qpsk, similar to what has been implemented for the phase- detector
in gr_costas_loop_cc? I'm asking, because I can't r
Hi,
I noticed that there is a hardcoded "`define NOCORDIC_TX" inside tx_chain.v
Does anyone know why this is disabled?
Is it a problem of FPGA size or are there any bugs inside tx_chain with
NOCORDIC_TX not defined?
Christian
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