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# System prepended metadata

title: IVC 5G O-RAN Summary
tags: [UNILA]

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# IVC 5G O-RAN Summary

###### tags: `UNILA`

## Summary 26th of July 2021

Nama 		: Dimas Danu Saputra
Student ID	: 1915031076
# Summary “Baseband Technology : 5G NR Physical Layer Design”

- 5G targets three main use cases with distinct connectivity requirements :
1.	Enhanced mobile broadband (eMBB),
2.	Massive machine type communications (mMTC) and
3.	Ultra-reliable low latency communications (URLLC)➢ also called as critical machine type communications (cMTC)

# 5G Targets
- eMBB
- mMTC
- cMTC

The key technology components of the NR physical layer are:
1.	Waveform
2.	modulation
3.	Multiantenna transmission (MIMO)
4.	Channel coding


# 5G NR Terminologies
–	Subcarrier Spacing,
–	Frame-Subframe,
–	Slot and
–	Symbol

- Tranform Precoding
Transform Precoding is to spread UL data in a special way to reduce PAPR(Peak-to-Average Power Ratio) of the waveform. In terms of mathematics, Transform Precoding is just a form of DFT (Digital Fourier Transform)

- Multi Antenna Transmission
Multiple-input/multiple-out (MIMO) technology is an established wireless communications technique for sending and receiving multiple data signals simultaneously over the same radio channel.
–	MIMO techniques play a prominent role in Wi-Fi communications, as well as 3G,4G, and 4G LTE networks.

# How does MIMO work ?

–	MIMO takes advantage of multi-path.
–	MIMO uses multiple antennas to send multiple parallel signals (from transmitter).
MIMO in 5G
•	Massive MIMO is the extension of traditional MIMO technology to antenna arrays having a large number 
•	Transmission signals from the antennas are adaptable by the physical layer via gain or phase control
![](https://i.imgur.com/SdH69Ze.png)
