As we all know, there is a relationship between SINR or SNR and BER. Specifically, when SINR/SNR is higher, the BER is lower. And there are lots of work on modeling the complex SINR/SNR.
Signal-to-noise ratio (abbreviated SNR or S/N) is a measure used in science and engineering that compares the level of a desired signal to the level of background noise. It is defined as the ratio of signal power to the noise power, often expressed in decibels. A ratio higher than 1:1 (greater than 0 dB) indicates more signal than noise. While SNR is commonly quoted for electrical signals, it can be applied to any form of signal (such as isotope levels in an ice core or biochemical signaling between cells).
Analogous to the SNR used often in wired communications systems, the SINR is defined as the power of a certain signal of interest divided by the sum of the interference power (from all the other interfering signals) and the power of some background noise. If the power of noise term is zero, then the SINR reduces to the signal-to-interference ratio (SIR).
two of them are from the wiki.
While, there is still a question that
"What is the core concept of SINR/SNR?"
It is clear that when the signal is higher than the interference plus the noise, the probability of decoding signal successfully is higher. But, what is the root component that supports this?
Until now, the "Capture Effect" is the only concept that I found can explain this.
The capture effect is defined as the complete suppression of the weaker signal at the receiver limiter (if it has one) where the weaker signal is not amplified, but attenuated. When both signals are nearly equal in strength, or are fading independently, the receiver may switch from one to the other and exhibit picket fencing.
This is the description from the wiki. Capture effect
Specifically, the limiter at receiver works for it and it can explain the SINR/SNR to BER correspondingly.
But I am not sure whether it is the exact reason for the SINR/SNR model.
well, there is another question in my mind just now:
what is the basic/general technology for wireless system to combat the interference? Besides the SINR/SNR model (or the relative power model)?
1.What is the core concept of SINR/SNR?
2.what is the basic/general technology for wireless system to combat the interference?