Dear all,
I have tried to use the QPAK modulation and demodulation exapmle from the
tutorial in the link below. I am using two USRPs B205 as transmitter and
receiver, frequency 910MHz , sampling rate 300k or 1 M sps. However, the
received signal's constellation after Costas loop are not synchronize
On 28/08/2024 12:13, ali siddig wrote:
Dear all,
I have tried to use the QPAK modulation and demodulation exapmle from
the tutorial in the link below. I am using two USRPs B205 as
transmitter and receiver, frequency 910MHz , sampling rate 300k or 1 M
sps. However, the received signal's constel
I already tried that, but may be it is a parameter values issue
I used :
Sample per symbol=4
Filter rolloff factor =350m
Prototype filter size 44
Loop bandwidth 62.8m
When the input value is random source (228,229), it works
But when the input value is random source (0,256), it doesn't work
Best
On 28/08/2024 13:35, ali siddig wrote:
I already tried that, but may be it is a parameter values issue
I used :
Sample per symbol=4
Filter rolloff factor =350m
Prototype filter size 44
Loop bandwidth 62.8m
When the input value is random source (228,229), it works
But when the input value is rand
Hello,
I have been trying to estimate the Noise Figure of the X440. I looked
through all the documentation I could find and couldn't find it anywhere,
so I tried to calculate it myself.
It looks like the ZU2xDR RFSoC has a NSD of -146dBFS/Hz @ 2.4GHz (
https://docs.amd.com/r/en-US/ds926-zynq-ultr
On 28/08/2024 18:04, Steve Hamn wrote:
Hello,
I have been trying to estimate the Noise Figure of the X440. I looked
through all the documentation I could find and couldn't find it
anywhere, so I tried to calculate it myself.
It looks like the ZU2xDR RFSoC has a NSD of -146dBFS/Hz @ 2.4GHz
(
Hi Marcus,
Thanks. Understood, that all makes sense to me. Part of this is I'm trying
to understand the base Noise Figure as a starting point so I can design my
filtered low noise front end as you suggest.
I guess you're confirming that 36.5dB is expected from the X440 and there's
nothing crazy w
On 28/08/2024 18:36, Steve Hamn wrote:
Hi Marcus,
Thanks. Understood, that all makes sense to me. Part of this is I'm
trying to understand the base Noise Figure as a starting point so I
can design my filtered low noise front end as you suggest.
I guess you're confirming that 36.5dB is expect
Here's an article that may help with your NF calculations.
"Calculating noise figure and third-order intercept in ADCs"
https://www.ti.com/lit/an/slyt090/slyt090.pdf
I wrote a little C program from it.
#include
#include
#include
int main(int argc, char **argv)
{
double k, t, dBm1Hz,
On 28/08/2024 19:36, Ron Economos via USRP-users wrote:
Here's an article that may help with your NF calculations.
"Calculating noise figure and third-order intercept in ADCs"
https://www.ti.com/lit/an/slyt090/slyt090.pdf
I wrote a little C program from it.
#include
#include
#include
int
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