# IVC 5G O-RAN Summary ###### tags: `UNILA` # Summary 6 : Baseband Technology (5G NR Physical Layer Design) Nama : Hans Khalif Hafif Student ID : 1915031078 Team : A-3 5G targets three main use cases with distinct connectivity requirements: • enhanced mobile broadband (eMBB) • massive machine type communications (mMTC) • ultra-reliable low latency communications (URLLC) ➢ also called as critical machine type communications (cMTC) ![](https://i.imgur.com/clQGYdX.jpg) The key technology components of the NR physical layer are: 1. Waveform 2. modulation 3. Multiantenna transmission (MIMO) 4. Channel coding • 5G still use OFDM-based modulation as in LTE – OFDMA – CP-OFDMA – SC-FDMA • NR supports QPSK, 16 QAM, 64 QAM and 256 QAM modulation formats for both uplink and downlink, as in LTE. – 256QAM : is used to support higher data rate transmission • π/2-BPSK : standard BPSK signal by multiplying the symbol sequence with a rotating phasor with phase increments per symbol period of π/2 – To reduce peak-to-average power ratio – To enhanced power amplifier efficiency at lower data rates, which is important for mMTC services.