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# System prepended metadata

title: Daily Report 6

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# Daily Report 6

:::success
### Task 6
## 26th of July 2021 



:::info
**Baseband Technology**
To realize the vision of  5G vision, the PHY system is designed and it is referred as New Radio. The key technology components of the NR physical layer are :
 # 1.	Waveform
 ![](https://i.imgur.com/V5E9wES.png)

# 2.	Modulation

5G still use OFDM-based modulation as in TE such as OFDMA, CP-OFDMA, and SC-FDMA.
![](https://i.imgur.com/uDxsA4n.png)

# 3.	Multiantenna transmission (MIMO)
![](https://i.imgur.com/9NBfHrb.png)

How does MIMO work?
-	MIMO takes advantage of multi-path
-	MIMO uses multiple antennas to send multiple parallel signals (from transmitter)
Why do we need Massive MIMO?
-	Capacity requirements
-	Coverage requirements
-	Technology capability
-	3GPP spec support
# 4.	Channel coding
![](https://i.imgur.com/8uycZca.png)
There are 2 type of polar code :
-	CRC-concatenated polar codes (CA-Polar Code) with single-parity-check code concatenation and multi CRC-concatenation
-	Parity-check concatenated polar code (PC-Polar Code)

