Hey guys,
I have a samplerate of 48kSPS on the myRIO. After a phase selective detection, the wanted signal is at 0Hz = DC. Now, I have to downsample my signal, as I want to low pass filter the signal at around 1Hz or 0.5Hz.
For this I use a 2 stage CIC filter. The input is I24.24 converted into I64 and as I only use change rates which are powers of two, I scale my CIC output with a bitshift back to I24.24, so register growth is no issue for further processing.
Can someone tell me what are disadvantages of high decimation rates?
At the moment I use 512, but I cant find any disadvantage in using 1024 or 2048...
Kind regards
Slev1n