Android Accelerometer filtering?

Question

I saw many examples about filtering Accelermeter\'s values, to cancel out the gravity (High-pass filter).

But most of them were 1st order one, which is said to be simple

Answer 1

the DSP Guide is what you're looking for. It gives the basic 'theory' as well as mathematics behind Digital Signal Processing and the works.

http://www.dspguide.com/ch14.htm That is a good starting point

Check it out.

And from personal experience, a 1st order filter will be 'good' enough for most simple applications. Though this completely depends on the specific application