On 26/06/2023 12:54, Arhum Ahmad wrote:
I have updated the rfconverter_libiio file in the base of Matlab. Now
I can see the variation in signal power in the spectrum analyzer.
However, in the receiver, the problem is still the same.
This is squarely a MATLAB problem at this point. So, you'll have to use
those support channels rather than usrp-users
On Mon, Jun 26, 2023 at 8:36 PM Marcus D. Leech
<patchvonbr...@gmail.com> wrote:
On 26/06/2023 09:32, Arhum Ahmad wrote:
Thanks for the response,
1. I am using UBX 10-6000 MHz
Rx/Tx(https://www.ettus.com/all-products/ubx40/)
2. Yes, I am using AGC for the processing part. The parameter
values I have uses are
- DesiredPower: 2
- AveragingLength: 50
- MaxPowerGain: 60
3. I have checked the spectrum of the signal in a
separate spectruHm analyzer, there is NO change in the
spectrum as I vary the gain.
Assuming you have a complete UHD installation, you can use the
tx_waveforms example app to check this as well. Since you're
using MATLAB, I cannot help with that aspect.
On Mon, Jun 26, 2023 at 2:58 AM Marcus D. Leech
<patchvonbr...@gmail.com> wrote:
On 25/06/2023 16:49, Arhum Ahmad wrote:
Respected sir,
I am using N-200 USRP for transmitting a signal. While
transmitting, I havechangedthe Gain value in the
SDRutransmitting block, but my signal strength at the
receiver remains the same. I also stop and restart the code
but the change in gain does not affect the received signal.
I have tried the changing gain via both available options
i.e., input port and dialog, but it seems to have no
effecton the receiver. The signal strength at the receiver
remains the same. I have tried 30 dB(Maximum gain) to 0 dB
(minimum gain) in both cases received SNR is the
same(i.e.,15 dB). I am using a wireless connection in
line-of-sight, with minimum Tx gain at least a fewdropsin
SNR should be observed. I have also tried -50dB (just
checking) but noeffect in the SNR is observed. The same
thing I havetried using B210 as Tx, Rx signal strength does
change in this case. However, while using N-200, noeffect of
changing the gain value is observed. Somehow gainvalue is
fixed in N-200 while using the MATLABSDRu block. Can you
PLEASE HELP ME!!! IT IS VERY, VERY IMPORTANT.
Well, neither usrp-users nor discuss-gnuradio are support
lists for MATLAB.
You haven't mentioned which daughter-card you are using in
the N200, which would certainly help to fill in information about
what *might* be going on.
Does your receiver setup use AGC? Do you know what its
set-points are?
If you simply look at the spectrum on the RX end as you vary
gain on the TX end, do you see a change? At the higher end,
SNR may not change very much, depending on how it is being
measured, etc.
--
*Thanks and Regards**
*
*Arhum Ahmad*
Ph.D. Scholar, Electrical Engineering Department, IIT Ropar
+91- <tel:+91-7015802356>7974897279
| arhum.19eez0...@iitrpr.ac.in <mailto:2016eez0...@iitrpr.ac.in>
Lab No. 323, Communication Research Lab, J.C.Bose Building
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--
*Thanks and Regards**
*
*Arhum Ahmad*
Ph.D. Scholar, Electrical Engineering Department, IIT Ropar
+91- <tel:+91-7015802356>7974897279 | arhum.19eez0...@iitrpr.ac.in
<mailto:2016eez0...@iitrpr.ac.in>
Lab No. 323, Communication Research Lab, J.C.Bose Building
*
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attachments are intended solely for the addressee(s) and may contain
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protected from disclosure. If you are not the intended recipient of
this message or their agent, or if this message has been addressed to
you in error, please immediately alert the sender by reply email and
then delete this message and any attachments. If you are not the
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