Noise Part 5. How to Calculate Signal-to-Noise Ratio (S/N), Noise Ratio (NR) & Noise Figure (NF).
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Calculating Signal-to-Noise Ratio (S/N), Noise Ratio (NR), and Noise Figure (NF) is essential in evaluating the performance of communication systems, amplifiers, and other electronic devices. Here’s a breakdown of how to calculate each of these parameters:
1. Signal-to-Noise Ratio (S/N)
Definition: The Signal-to-Noise Ratio (S/N) is the ratio of the power of a signal to the power of background noise. It's often expressed in decibels (dB).
2. Noise Ratio (NR)
Definition: The Noise Ratio (NR) can refer to the ratio of noise power to signal power. It is less commonly used than S/N, but it is relevant in some contexts.
3. Noise Figure (NF)
Definition: The Noise Figure (NF) measures how much the signal-to-noise ratio degrades as it passes through a component (like an amplifier). It indicates how much noise the component adds to the signal.
Summary
S/N indicates how well the signal can be distinguished from the noise.
NR provides insight into how much noise is present compared to the signal.
NF quantifies the degradation of the signal-to-noise ratio as it passes through a system.
These calculations are fundamental in the design and analysis of communication systems and signal processing applications.
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