algorithm for power of a single fre

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3 total messages Started by Daniel Jeffrey Mon, 08 Jan 1996 00:00

#2598

Author: Daniel Jeffrey
Date: Mon, 08 Jan 1996 00:00

10 lines
956 bytes

Hello, a friend of mine told me about a wonderful algorithm that he us
Unfortunatly he cant find it anymore so I'm hoping someone here know a
can tell me where to look.
	The algorithm takes as input a dicrete time signal containing a multi
of frequencies, and a single frequency identifier.  It returns the pow
for that single frequency.
My friend says that it's super fast and can work on small data sets.
Any idea's anyone?
Thanks,
Daniel / Montreal.

Re: algorithm for power of a single fre

#2599

Author: Jose A. Rosendo
Date: Tue, 09 Jan 1996 00:00

23 lines
1433 bytes

In article <4crukb$l76$2@mhade.production.compuserve.com>,
   Daniel Jeffrey <76401.3073@CompuServe.COM> wrote:
>Hello, a friend of mine told me about a wonderful algorithm that he us
>Unfortunatly he cant find it anymore so I'm hoping someone here know a
>can tell me where to look.
>	The algorithm takes as input a dicrete time signal containing a multi
>of frequencies, and a single frequency identifier.  It returns the pow
>for that single frequency.
>My friend says that it's super fast and can work on small data sets.
>Any idea's anyone?
>Thanks,
>Daniel / Montreal.

Perhaps you refer to the Goerzel algorithm. You can find it in most 
Oppenheim-Schafer books, e.g., 'Discrete-Time signal Processing', 
Prentice-Hall, pp. 585-87, 1989.

Regards,
Jose A. Rosendo 

Dept. Electrical Engineering
University of Seville
Spain

Re: algorithm for power of a single fre

#2600

Author: Steve Brasch
Date: Tue, 09 Jan 1996 00:00

11 lines
1134 bytes

The Goertzel algorithm can be used to compute the power of a single 
frequency. This algorithm is an implementation of the DFT for a single 
frequency and requires a single co-efficient which is related to the 
frequency to be measured and the sample rate. Refer to "Digital Signal 
Processing Applications using the ADSP 2100 Family", by Analog Devices 
Inc, p 458 for a simple explanation on how to implement. Contact your 
local Analog Devices rep to find a copy of this book

Best of luck

Steve

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