Monday, April 23, 2012

butterworth low-pass filter for android

I'm currently involved in attempting to make a crude pedometer.
It has come to the stage where i am reading in signals and plotting them on Excel to analyse...
The data is quite noisy due to step bounce back and various other reasons. I am taking in a single acceleration vector and was trying to use the following DSP filter design tool that i found through the york cs department to design a Butterworth low-pass filter:



http://www-users.cs.york.ac.uk/~fisher/mkfilter/trad.html



It may be that I am inputting the wrong values for the necessary fields but at the same time I am having trouble translating the Ansi "C" code to Java!



Would anyone be able to lend a helping hand?





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