Error generating a psk modulation
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Rachana Aravind
el 4 de Jul. de 2019
Respondida: Samatha Aleti
el 30 de Jul. de 2019
Hi,
I am trying this code
%%
% Set the random number generator to a known state to be able to regenerate
% the same frames every time the simulation is run
rng(123456)
% Random bits
d = randi([0 1],1024,1);
% BPSK modulation
syms = pskmod(d,2);
% Square-root raised cosine filter
filterCoeffs = rcosdesign(0.35,4,8);
tx = filter(filterCoeffs,1,upsample(syms,8));
% Channel
channel = helperModClassTestChannel(...
'SampleRate',1e8, ...
'SNR',20, ...
'PathDelays',[0 1.8 3.4] / 200e3, ...
'AveragePathGains',[0 -2 -10], ...
'KFactor',4, ...
'MaximumDopplerShift',4, ...
'MaximumClockOffset',5, ...
'CenterFrequency',900e6);
rx = channel(tx);
and getting the very last entry of the rx vector as Nan+NaNi
What is the reason? How to fix this problem?
Thanks for your help in advance.
2 comentarios
KALYAN ACHARJYA
el 4 de Jul. de 2019
Editada: KALYAN ACHARJYA
el 4 de Jul. de 2019
@Rachana Matlab version, you are using?
Hello Memeber, it may be helpful to check, the question belongs from here
Respuesta aceptada
Samatha Aleti
el 30 de Jul. de 2019
In the class HelperModClassTestChannel the timing drift is calculated based on the clock offset for the current frame and specified sampling rate. The output of sampling time drift is the values of input at the modified sampling rate. This tried to interpolate data out of input range, leading to a NAN value.
Hope this helps!
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