Oversampling and snr

1. Does oversampling improve SNR?
2. Does oversampling reduce noise?
3. Does sampling rate affect SNR?
4. What is the purpose of oversampling?

Does oversampling improve SNR?

The samples obtained by oversampling are low-pass filtered and decimated using a digital filter to achieve a reduction of the quantization noise. The signal at the frequency band of interest is not affected by the filter, and the result is an improved SNR. The improved SNR results in a higher ENOB performance.

Does oversampling reduce noise?

Oversampling Description

Besides oversampling with a Δ-Σ ADC, oversampling a high throughput SAR ADC can improve antialiasing and reduce overall noise.

Does sampling rate affect SNR?

Noise bandwidth decrease, the output noise energy reduce and the output SNR increase with the sampling rate increasing. So, we can obtain high SNR by increasing the sampling rate.

What is the purpose of oversampling?

Oversampling is capable of improving resolution and signal-to-noise ratio, and can be helpful in avoiding aliasing and phase distortion by relaxing anti-aliasing filter performance requirements. A signal is said to be oversampled by a factor of N if it is sampled at N times the Nyquist rate.