How to create a cosine filter ?
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i treid to use this code
Nsym = 6; % Filter span in symbol durations
beta = 0.5; % Roll-off factor
sampsPerSym = 8; % Upsampling factor
rcosFlt = comm.RaisedCosineTransmitFilter(...
'Shape', 'Normal', ...
'RolloffFactor', beta, ...
'FilterSpanInSymbols', Nsym, ...
'OutputSamplesPerSymbol', sampsPerSym)
% Visualize the impulse response
fvtool(rcosFlt, 'Analysis', 'impulse')
but the matlab result is
??? Undefined variable "comm" or class
"comm.RaisedCosineTransmitFilter".
I hope that my question is clear ,thanks :) >>
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Risposta accettata
Wayne King
il 13 Nov 2013
Do you have the Communication System Toolbox installed?
That functionality ships with that toolbox.
The Signal Processing Toolbox has functions for raised cosine filtering: rcosdesign()
Più risposte (1)
Ken
il 10 Gen 2014
I have a similar problem. Can someone tell us how to fix this. I have othe comm. functions in my package. More so, I have this RaisedCosine filter in my Simulink package, and it works perfectly.
1 Commento
Yingyu
il 27 Gen 2014
Exactly, I also have the same problem. I have used >>ver to double confirm that I have the Signal Processing Toolbox. However when I typed the commands like what Nasser Dav did, I received the same error. =(
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