Spectrum:
● Operates across a wide range of frequency bands from sub-1GHz to mmWave (>24 GHz)
● Utilizes low bands <1 GHz, mid bands 1-6 GHz, and high bands mmWave 24-40 GHz
● Sub-6 GHz provides wide-area macro cell coverage, mmWave enables small cell deployments
Technical Features:
● Supports larger channel bandwidths up to 400 MHz compared to 20 MHz in LTE, increasing spectral efficiency
● Leverages advanced multi-antenna technologies like MU-MIMO, SU-MIMO, and beamforming
● Adaptive beamforming with precoding focuses signal strength in certain directions to improve coverage
● Modulation schemes up to 1024-QAM increase peak data rates compared to 256-QAM in 4G
● Adaptive modulation and coding adjusts modulation and coding rate based on channel conditions
● New scalable OFDM numerology with subcarrier spacing from 15 kHz to 480 kHz balances coverage and capacity
● Self-contained TDD subframes eliminate guard periods between DL/UL switching
● New physical layer procedures like configured grant access improve latency
● End-to-end network slicing provides differentiated QoS treatment for various services
● Advanced network architecture and QoS framework meets requirements of eMBB, URLLC, and mMTC use cases
In summary, NR delivers substantial improvements over LTE in spectrum flexibility, bandwidth, modulation, beamforming, and latency to support the demands of 5G services. It is the foundational air interface technology enabling 5G deployments.
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Post time: Sep-14-2023