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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채택된 답변
Wayne King
2013년 11월 13일
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()
추가 답변 (1개)
Ken
2014년 1월 10일
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.
댓글 수: 1
Yingyu
2014년 1월 27일
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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