Hi Marcus,
Thanks for the great explanation! I didn’t really get what is "0.06 or 0.03 of
f_sample_higher_side/2”, but it is clear now that the aliasing is due to
non-ideal low pass filters after zero padding, so it’s better to avoid the
edges of the Nyquist band.
Thanks again,
Roee
_
he first e-mail come through ok? They were pretty
basic, but show the layout of the transmitter and receiver.
-Trip
On Mon, Nov 16, 2015 at 5:47 PM, Roee Bar mailto:ro...@ece.ubc.ca>> wrote:
Thanks James,
What do you mean by “USRP will generate the in-phase and quadrature
components”? Are
frequency again.
-Trip
On Mon, Nov 16, 2015 at 2:52 AM, Roee Bar mailto:ro...@ece.ubc.ca>> wrote:
Hi James,
Thank you very much for your time and effort!
Your explanation of the USRP complex modulation/demodulation is equivalent to
what I originally described.
Since my experiments show
imaginary part, the absolute
of the received signal?
2. What were you expecting, and what don't you find? Your axes are a bit too
small to see whether we see any distortion in the signal.
Best regards,
Marcus
On 14.11.2015 01:05, Roee Bar wrote:
> Yes I am changing the frequency on bot
on direct conversion architecture (advantages/disadvantages):
http://www.seas.ucla.edu/brweb/papers/Journals/RTCAS97.pdf
<http://www.seas.ucla.edu/brweb/papers/Journals/RTCAS97.pdf>
Hopefully that points you in the right direction, let me know if you need any
more info (or any USRP specific in
Hello,
I am trying to understand how the USRP performs the
modulation/demodulation to/from higher frequencies.
Let's say I have a complex signal s(t). When I feed it to the USRP
block, my understanding is that the USRP performs something like
s(t)*exp(i*w*t), and transmit the real part of it
equency is exactly that, a
multiplication with a sinusoid.
Best regards,
Marcus
On 13.11.2015 07:01, Roee Bar wrote:
Hello,
I am experiencing some weird behaviour with USRP blocks.
I have a PHY block that generates packets with "packet_len" tag. This
stream is the input to a
Hello,
I am experiencing some weird behaviour with USRP blocks.
I have a PHY block that generates packets with "packet_len" tag. This stream is
the input to a USRP sink block (the transmitter). Between packets, my PHY block
does not produce anything, so the USRP assumes zeros until a new packet
esday, November 10, 2015, Roee Bar <mailto:ro...@ece.ubc.ca>> wrote:
Hello,
I have written a OOT module (in python) that receives and send PMT
messages according to some state machine.
However, I need a timer so that the block will transmit a message
after some t
Hello,
I have written a OOT module (in python) that receives and send PMT
messages according to some state machine.
However, I need a timer so that the block will transmit a message after
some timeout. I.e., if nothing happens for x seconds, a function is called.
Is there any built-in mecha
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