How to increase SNR with oversampling-signal?
Assuming a constant noise out to f b and then rolling off after that, we would increase SNR after correlation up to the point where f s / 2 = f b (for a real signal) Increasing the sampling rate beyond that will not increase SNR.
What happens to SNR when increasing F S?
Increasing f s further, to let’s say double to give us f s = 4 B, we get an additional 3 dB gain in “SNR”. Even though we’ve used the term “SNR”, this is the ratio of the signal against the quantization noise of the ADC and not against any other sources of noise.
How to increase the SNR of the ADC?
Setting f s = 2 B, which is the theoretical Nyquist rate, gives you the simplified expression for the SNR of the ADC, which is a function of N only. Increasing f s further, to let’s say double to give us f s = 4 B, we get an additional 3 dB gain in “SNR”.
How does increasing the slice thickness affect Snr?
Increasing the slice thickness will increase the SNR. This follows the principle that increasing the slice thickness increases the voxel size resulting in an increase in the amount of signal received by the individual voxels. Increasing the slice thickness will however reduce the spatial resolution and increase the partial volume effects.
What are the advantages of higher sampling rate?
Sampling at a higher rate will distribute the quantization noise over a wider frequency, thus reducing the noise spectral density due to that quantization noise, with a lot of caveats. For more details on that see What are advantages of having higher sampling rate of a signal?
How much gain in dynamic range and SNR can be expected?
How much gain in dynamic range and SNR can be expected if we are to oversample a signal with fixed analog input bandwidth. For Example if I have a analog filter at the input which limits the bandwidth to 100 MHz.