Mark Rages wrote: > On Nov 5, 2007 6:23 PM, Russell McMahon wrote: > >> At a quick glance it looks more related to a fixed frequency >> plus harmonics DFT. >> It would be "faster" than an FFT only because it covers a >> restricted Spectrum. If I'm correct then an even quicker >> method would be to implement an FFT subset targeted at >> specific frequencies. >> >> > > "FFT subset targeted at specific frequencies" is an accurate > description of a Goertzel filter. > > Regards, > Mark > markrages@gmail > You might add that it's missing phase data, no? -- Martin K -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist