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Anti-Aliasing filter depends on the following parameters; Signal BW Sampling Rate Sampling duration and thus BW of sample LPF attenuation of alias spectrum above 1. From your SNR spec or dy...
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#2: Post edited
by
TonyStewart
·
2022-04-09T14:32:03Z (over 2 years ago)
- Anti-Aliasing filter depends on the following parameters;
- 1. Signal BW
- 2. Sampling Rate
- 3. Sampling duration and thus BW of sample
- 4. LPF attenuation of alias spectrum above 1. From your SNR spec or dynamic range desired for resolution
When sampling rates of 64x are used, often a 1st order LPF is all that is needed when 32x , a 2nd order filter, when 2x sampling rate, you need a brick wall filter that suffers from group delay distortion near bandedge. These are the benefits of over sampling (order vs SNR are tradeoff estimates only, no precise.)
- Anti-Aliasing filter depends on the following parameters;
- 1. Signal BW
- 2. Sampling Rate
- 3. Sampling duration and thus BW of sample
- 4. LPF attenuation of alias spectrum above 1. From your SNR spec or dynamic range desired for resolution
- When sampling rates of 64x are used, often a 1st order LPF is all that is needed when 32x , a 2nd order filter, when 2x sampling rate, you need a brick wall filter that suffers from group delay distortion near bandedge. These are the benefits of over sampling (order vs SNR are tradeoff estimates only, not precise.)
#1: Initial revision
by
TonyStewart
·
2022-04-09T14:31:15Z (over 2 years ago)
Anti-Aliasing filter depends on the following parameters; 1. Signal BW 2. Sampling Rate 3. Sampling duration and thus BW of sample 4. LPF attenuation of alias spectrum above 1. From your SNR spec or dynamic range desired for resolution When sampling rates of 64x are used, often a 1st order LPF is all that is needed when 32x , a 2nd order filter, when 2x sampling rate, you need a brick wall filter that suffers from group delay distortion near bandedge. These are the benefits of over sampling (order vs SNR are tradeoff estimates only, no precise.)