why do i get zero vector when using USRP N210 with MATLAB using comm.SDRuReceiver ?

6 views (last 30 days)
i want to recived real TV signal and using the following functions:
radio = comm.SDRuReceiver( 'Platform','N200/N210/USRP2','IPAddress','192.168.10.2', ...
'CenterFrequency',650e6);
spectrumAnalyzer = dsp.SpectrumAnalyzer('InputDomain','Frequency',....
'SampleRate', 1e9,....
'SpectrumType', 'Power density',...
'YLimits', [-130,20],...
'PlotAsTwoSidedSpectrum', false,...
'SpectralAverages', 50, ...
'FrequencySpan', 'Start and stop frequencies', ...
'StartFrequency', 500e6, ...
'StopFrequency', 800e6,...
'Position', figposition([50 30 30 40])) ;
[rxSig, len ] = radio();
spectrumAnalyzer(rxSig);
why the {rxSig} is zeros and also the plot results is zero.

Accepted Answer

Karunya Choppara
Karunya Choppara on 17 Apr 2021
When len = 0, the data from radio() call is not a valid data, and we see all zeros in the rxSig output.
When providing data to the spectrumAnalyzer, we need to check the condition that len output is greater then 0.
[rxSig, len ] = radio();
if (len>0)
spectrumAnalyzer(rxSig);
end
  4 Comments

Sign in to comment.

More Answers (0)

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!