Re: [Discuss-gnuradio] dc restorer

[Ramakrishnan Muthukrishnan]

 || On Tue, 5 Oct 2004 17:04:34 -0400 (EDT)
 || cswiger <address@hidden> wrote: 

 cswiger> Gang - Working from this algorithm:
 cswiger> http://www.dspguru.com/comp.dsp/tricks/alg/dc_block.htm
 cswiger> http://aulos.calarts.edu/pipermail/music-dsp/1998-March/020124.html

 cswiger> the following seems to work removing a dc offset from a signal.
 cswiger> Hasn't been thoroughly tested, submitted for peer review. It doesn't
 cswiger> look too expensive in cpu.

Another algorithm given in books (and also widely used) is to have a pole
and zero closely placed at z=1, i.e at angle zero.

i.e Y(z)/X(z) = (1-z^-1)/(1-alpha*z^-1) where alpha is less than one but
vlose to 1, say 0.98.

-- 
    Ramakrishnan                   http://www.hackGNU.org/
    Use Free Software -- Help stamp out Software Hoarding!