I have a transfer function of a channel which is given by abs ( cos((pi/2) . (f/fc) ) where fc is a constant freq and the freq f goes from dc to 2fc. What would be the best way of simulating this ie passing a known signal through this channel.? I suppose I coudldtake an inverse FT to get the impusle response but it has an absolute value in it. Maybe I could multiply in the freq domain and inverse FFT? regards Tam
Convolution Question
Started by ●March 11, 2006
Reply by ●March 12, 20062006-03-12
HelpmaBoab schrieb:> I have a transfer function of a channel which is given by > > abs ( cos((pi/2) . (f/fc) ) > > where fc is a constant freq and the freq f goes from dc to 2fc.Are you sure this isn't the magnitude response of the transfer function?
Reply by ●March 12, 20062006-03-12
Yes it is the magnitude response - sorry. I have the phase characteristics too - they are -(pi/2)(f/fc) and it jumps at f=fc by -pi rads. regards Tam
Reply by ●March 12, 20062006-03-12
naebad wrote:> Yes it is the magnitude response - sorry. I have the phase > characteristics too - they are > > -(pi/2)(f/fc) and it jumps at f=fc by -pi rads. > > regardsThe filter you seek has been discussed in comp.dsp before, for example: http://groups.google.ch/group/comp.dsp/msg/c8aecd35b58f6353 Regards, Andor
Reply by ●March 12, 20062006-03-12
naebad wrote:> Yes it is the magnitude response - sorry. I have the phase > characteristics too - they are > > -(pi/2)(f/fc) and it jumps at f=fc by -pi rads. > > regardsThe filter you seek has been discussed in comp.dsp before, for example: http://groups.google.ch/group/comp.dsp/msg/c8aecd35b58f6353 Regards, Andor