---
# System prepended metadata

title: <center> **Daily Report 3** </center>
tags: [5G O-RAN, ITB NTUST 5G course, O-RAN, IVC]

---

# <center> **Daily Report 3** </center>
###### tags: `O-RAN` `IVC` `5G O-RAN` `ITB NTUST 5G course`
> Date: 21/07
## <center> **Fundamental Knowledge for Wireless Communications** </center>

### **Important Aspects**
#### **1. Wireless Technology**
#### **2. Source Coding Theory**
#### **3. Channel Coding Theory**

### **Summary**
There are 7 layers in the Open Systems Interconnection (OSI). Media Layer to define network transmission media, data synchronization bits, signaling methods, network architecture. Wireless technology is an implementation of the Physical layers and Data layers. The important element to handle communication in User Equipment are Digital Base Band Processor and RF / IF Interface. Digital Baseband is using to process communication. Communication channels: smartphone, satellite, fiber optic, router, disk storage. Claude Shannon is the inventor of the bit and the shannon data compression method. Shannon Entropy used for measure information in terms of number of bits:
![](https://i.imgur.com/rHNqHnw.png)
Shannon’s Source Coding Theorem: “To reliably store the information generated by some random source X, you need no more or less than, on the average, H(X) bits for each outcome.”. Impairement like “packet loss” can be viewed as Erasures. Data that are lost during transmission. Huffman codes are used in nearly every application that involveds the compression and transmission of digital data, which is a method to achieve the optimal compression ratio guaranteed by Shannon. Results produced by Huffman encoding are always optimal. Shannon Fano sometimes does not achieve the lowest possible expected code word length. The Huffman coding uses prefix code conditions while Shannon fano coding uses cumulative distribution function. However Shannon Fano algorithm also produces prefix codes. Application of source coding theorem: Image Compression, Data Compression, Audio/Video Compression, Audio Compression. Application of channel coding theorem: VCD/DVD (Reed-Solomon Codes), Data Compression (Convolutional Codes), Audio/Video Compression (Reed-Solomon Codes), Audio Compression (LT codes, Raptor Codes). Entropy of a Bernoullu trial as a function of success probability, often called the binary entropy function, H( p ).

### Comment
Wireless technology is very useful in everyday life. To perform the calculation of bits required accuracy so as not to be wrong.

## <center> **Discussion with team** </center>
:::info
### 1. Discuss About Assignments
### 2. Discuss About Final Project
### 3. Discuss About Next Meeting
:::