Adding SNR from multiple detectors

In summary, SNR (Signal-to-Noise Ratio) is a measure of signal strength compared to background noise and is important in scientific research to assess data reliability. Using multiple detectors can improve overall SNR by combining uncorrelated noise, increasing detection area, and providing a more comprehensive view of the signal. However, this method may not be effective if signals are strongly correlated. The optimal number of detectors for a given experiment depends on factors such as signal strength, background noise, and feasibility. It may be helpful to perform simulations or experiments to determine the best configuration.
  • #1
sparkle_pony
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I am looking at the same object with two detectors. The SNR on each is 2, which is a low probability of detect given a single sensor. However, if I fuse the two what would be the SNR then? Would it be additive (SNR=4) or rss (SNR=2×sqrt(2)) or something more complicated?
 
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  • #2
Correlated signals add, uncorrelated signals are sqrt(sum of squares).

If the noise is uncorrelated between the detectors, and the signal is correlated, you will improve the SNR
 

1. What is SNR and why is it important in scientific research?

SNR stands for Signal-to-Noise Ratio and it is a measure of the strength of a signal compared to the background noise. It is important in scientific research because it helps to determine the reliability and accuracy of data, particularly in experiments where the signal is weak or the noise is high.

2. How does adding SNR from multiple detectors improve the overall SNR?

When multiple detectors are used to measure the same signal, the resulting SNR is the sum of the individual SNRs from each detector. This is because the noise from each detector is uncorrelated, whereas the signal is correlated, leading to an increase in SNR when combined.

3. What are the benefits of using multiple detectors instead of one large detector?

Using multiple detectors allows for a larger overall detection area, which can increase the number of signals that can be detected. Additionally, multiple detectors can be placed in different locations, providing a more comprehensive view of the signal and potentially reducing the effects of background noise.

4. Are there any limitations to adding SNR from multiple detectors?

While adding SNR from multiple detectors can improve the overall SNR, it is important to note that this method is most effective when the signals are uncorrelated. If there is a strong correlation between the signals, adding SNR from multiple detectors may not significantly improve the overall SNR.

5. How can one determine the optimal number of detectors to use for a given experiment?

The optimal number of detectors will depend on the specific experiment and the desired level of SNR. It is important to consider factors such as the strength of the signal, the amount of background noise, and the cost and feasibility of using multiple detectors. In some cases, it may be helpful to perform simulations or experiments with different numbers of detectors to determine the optimal configuration.

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