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Peak detection on an undersampled signal

Started by rang...@yahoo.com July 13, 2007
Hi all,
I am trying to do peak detection on a signal that is under sampled (to save power). I am trying to find some DSP routine to do this more accurately than just going on an amplitude comparison basis. I read online that you can use orthogonal wavelet transform or some other form of wavelet transform to do peak detection easily. My SNR is not very bad so that is not a problem. All I am trying to do is improve my accuracy of the peak's location and amplitude by using some DSP routine. Is looking at wavelets a right direction for this at all. Can somebody guide me in the right direction. Thanks.

Ranga
Hi Ranga
plz let me know if you are looking for peaks (amplitudes) in a given signal,
as attached (see the schematic diagram).
if yes, then it could be done using a simple MATLAB code.

with best regards
Faisal
On 12/07/07, r...@yahoo.com wrote:
>
> Hi all,
> I am trying to do peak detection on a signal that is under sampled (to
> save power). I am trying to find some DSP routine to do this more accurately
> than just going on an amplitude comparison basis. I read online that you can
> use orthogonal wavelet transform or some other form of wavelet transform to
> do peak detection easily. My SNR is not very bad so that is not a problem.
> All I am trying to do is improve my accuracy of the peak's location and
> amplitude by using some DSP routine. Is looking at wavelets a right
> direction for this at all. Can somebody guide me in the right direction.
> Thanks.
>
> Ranga