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MathGroup Archive 2007

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chirp function

  • To: mathgroup at smc.vnet.net
  • Subject: [mg81069] chirp function
  • From: Will Robertson <wspr81 at gmail.com>
  • Date: Mon, 10 Sep 2007 18:54:48 -0400 (EDT)

Hello,

It surprised me that there isn't a chirp signal in mathematica. Here's
one:

LinearChirp[time t, frequency gradient kf]
	returns the linear chirp output at time t with frequency increase per
second kf
LinearChirp[time t, initial frequency f0, final time t1, final
frequency f1]
	returns the linear chirp output at time t with initial frequency f0
and frequency f1 at time t1

LinearChirp[t_, fi_, tf_, ff_] := Sin[2 \[Pi] t (fi + (ff - fi)/tf t/
2)]
LinearChirp[t_, kf_] := Chirp[t, 0, 1, kf]

Hope this helps,
Will



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