3GPP	Third Generation Partnership Project
4G	Fourth Generation of Mobile Networks
5G	Fifth Generation of Mobile Networks
A	Antenna Gain
ACK	Acknowledgment
ASCII	American Standard Code for Information Interchange (encoding)
B	Bandwidth
BLER	Block Error Rate
BPSK	Binary Phase Shift Keying
cMTC	Critical Machine Type Communication
CL	Coupling Loss
DL	Downlink
ECL	Enhanced Coverage Level
eNodeB	Evolved Node B (base station in a LTE network)
GSM	Global System for Mobile Communication
HARQ	Hybrid Automatic Repeat Request
IM	Interference Margin
IMT-2020	International Mobile Telecommunications 2020 Specification
IoT	Internet of Things
IP (-v4, -v6)	Internet Protocol (Version 4, Version 6)
ISM	Industrial, Scientific and Medical Frequency Band
k	Boltzmann’s constant
LoRaWAN	Long-Range Wide Area Network (LPWAN technology)
LPWAN	Low-Power Wide Area Network
LTE	Long-Term Evolution
LTE Cat-M1	LTE Category M1 (LPWAN technology)
$\mu$	Mean value
MAC	Medium Access Control
MCL	Maximum Coupling Loss
MCS	Modulation and Coding Scheme
mMTC	Massive Machine Type Communication
MNO	Mobile Network Operator
MTC	Machine Type Communication
N	Number of measurement samples
$N_{Rep}$	Number of ECL repetitions
$N_{RU}$	Number of resource units
$N_{SF}$	Number of subframes
NACK	Negative Acknowledgment
NB-IoT	Narrowband Internet of Things
NF	Noise Figure
NLOS	Non-Line of Sight
NPDCCH	Narrowband Physical Downlink Control Channel
NPDSCH	Narrowband Physical Downlink Shared Channel
NPUSCH	Narrowband Physical Uplink Shared Channel
NRS	Narrowband Reference Symbol
NTP	Network Time Protocol
OFDM	Orthogonal Frequency Division Multiplexing
$P_{CMAX,c\left(i\right)}$	Cell-specific maximum transmit power on slot i
$P_I$	Interference power
$P_N$	Noise power
$P_{N,eff}$	Effective noise power
$P_{RX,min}$	Sensitivity
$P_{TX}$	Transmission power at the antenna connector
PDCP	Packet Data Convergence Protocol
PHY	Physical Layer
PRB	Physical Resource Block
QoS	Quality of Service
QPSK	Quadrature Phase Shift Keying
$R_{max}$	Maximum data rate
RB	Resource Block
RE	Resource Element
RF	Radio Frequency
Rel-13/14/15	3GPP LTE Release Version 13/14/15
RLC	Radio Link Control
ROHC	Robust Header Compression
RSRP	Reference Signal Received Power
RSRQ	Reference Signal Received Quality
RSSI	Received Signal Strength Indicator
RU	Resource Unit
RX	Receiver
$\sigma$	Standard deviation
SC-FDMA	Single Carrier Frequency-Division Multiple Access
SF	Subframe
SINR	Signal-to-Interference and Noise Power
SMS	Short Message Service
SNR	Signal-to-Noise Ratio
SRD	Short Range Devices Frequency Band
T	Temperature
$T_{min}$	Minimum transmission time
$T_{RU}$	Transmission time of one resource unit
$T_{SF}$	Transmission time of one subframe
TBS	Transport Block Size
TX	Transmitter
UDP	User Datagram Protocol
UE	User Equipment (mobile network modem)
UL	Uplink
USB	Universal Serial Bus
WSN	Wireless Sensor Networks
x	Subcarrier activity factor