Sunday, December 24, 2006

low power filters using polyphase decomposition

Polyphase decomposition is a method of transforming a filter into k filters running at 1/k of the sampling rate. The benefit of polyphase decomposition is that reducing the sampling rate of a filter by a factor of k, reduces the power required to implement the filter by a factor of k^3. Of course if we require k times more filters to implement the system, we may only get a k^2 power benefit. I have to play with some real systems to get data.

1 comment:

Vinu said...

Hi,

Could you help me with designing a Low Pass FIR using Polyphase Decomposition? I mean, how do I start off with, given the specifications of the FIR design? Kindly Help.

Thanks,
Vinati