常用缩略语
LTE，Long Term Evolution
3GPP，3G Partnership Project
ITU，International Telecommunication Union
IMT-2000，International Mobile Telecom-
munication 2000
TDD，Time Division Duplex
FDD，Frequency Division Duplex
IMT-Advanced
LTE-Advanced
LTE-Advanced Pro
IMT-2020
eMBB，enhanced Mobile Broadband
URLLC，Ultra-Reliable Low latency
Communications
mMTC， Massive Machine-type Comm.
MIMO，Multi Input Multi Output
3D MIMO
Massive MIMO
OFDM，Orthogonal Frequency Division
Multiplexing
NOMA，Non-Orthogonal Multiple Access
D2D，Device-to-Device
NB-IoT，Narrow band-Internet of Things
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