# Relation between Signal to Noise ratio and Logical Interference

1. Oct 9, 2012

### md.kamal1262

Hi there, I want to modify a equation which is written for Singal to Noise Ratio. Now I want to change for logical interference. But I could not find any reliable source of explanation, " what is the relation between SNR/SINR and interference(Logical/Physical)?"

2. Oct 9, 2012

### collinsmark

Hello md.kamal1262,

Welcome to Physics Forums!
It kind of depends on what type of system you're working with.

Here is a place to start.

http://www.telecomhall.com/what-is-ecio-and-ebno.aspx

That gives you an explanation of $E_c/I_0$. But after that you want to consider whether the interference from other cells/base stations/NodeB/access points are also being considered as "interference." Then, you'll still need to consider whether the receiver's internal thermal noise is considered too. They all take different forms of "$E_c/I_0$" such as $E_c/I_{0r}$, $E_c/\hat I_{0r}$. Of course, even that notation depends on the standard/technology in question.

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