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Radio Frequency (RF) basics
Radio Receive characterization
This is a simple tutorial to present fundamentals to characterize radio receiver
Following characteristics of a receiver are discussed in detail in this section:
Signal to Noise Ratio (SNR).
Noise Factor (F). & Cascaded F
Noise Figure (NF).
Minimum Detectable Signal.
Intermodulation (IM) distortion.
Second order IM products.
Third order IM products.
IP3 (Third Order Intercept) point.
Dynamic Range (DR)
SNR:- Signal to Noise Ratio
It is the ratio of Signal power to Noise power.
Noise Factor is ratio of input SNR to the output SNR of a receiver.
Noise Figure is a measure of degradation of SNR when a signal passes through a system.
If there is no noise (ideal) in a system then we will have following:-
F = 1
NF = 0
So, NF is always greater than or equal to 1