Decimation for demodulation

Started by c1910 June 14, 2007
hi!
i want to demodulate AM signal with DSP...i found an article that says
like this : 

demodulator is illustrated as decimation integration filter. It includes a
multiplier portion and an integration/decimation portion. 

so can we demodulate AM using decimation method?
and what is decimation integration filter?

thank you...
On Thu, 14 Jun 2007 04:57:03 -0500, c1910 wrote:

> hi! > i want to demodulate AM signal with DSP...i found an article that says > > like this : > > demodulator is illustrated as decimation integration filter. It includes a > > multiplier portion and an integration/decimation portion. > > so can we demodulate AM using decimation method? > and what is decimation integration filter? > > thank you...
Surely a web search turned up something? It sounds like they're using synchronous AM demodulation, and following the synchronous demodulator (the multiplier) by a low-pass filter that operates by integrating then decimating. -- Tim Wescott Control systems and communications consulting http://www.wescottdesign.com Need to learn how to apply control theory in your embedded system? "Applied Control Theory for Embedded Systems" by Tim Wescott Elsevier/Newnes, http://www.wescottdesign.com/actfes/actfes.html