Howtosignalprocessing
- What happens when you increase the sampling frequency?
- How does sampling rate affect SNR?
- What is the relationship between sampling rate and frequency?
- What happens when you decrease the sampling frequency?
What happens when you increase the sampling frequency?
When the sampling rate (Fs) is increased, the distance between the maximum frequency content Fm and Fs/2 will increase. This increase in the gap between the maximum frequency content of the signal and Fs/2 will ease requirements on the transition bands of the anti-aliasing analog filter.
How does sampling rate affect SNR?
for the same wordsize, higher sampling rate increases the SNR (within a fixed bandwidth) by 6 dB or 1 added bit of resolution for every two octaves of sample rate. and that's without noise-shaping. toss in noise shaping and you get better than 3 dB increase in SNR for each doubling of sample rate.
What is the relationship between sampling rate and frequency?
Sampling rate determines the sound frequency range (corresponding to pitch) which can be represented in the digital waveform. The range of frequencies represented in a waveform is often called its bandwidth.
What happens when you decrease the sampling frequency?
As the sampling frequency decreases, the signal separation also decreases. When the sampling frequency drops below the Nyquist rate, the frequencies will crossover and cause aliasing.
