The glossary contains terms and acronyms that are used in this document.
16-state Quadrature Amplitude Modulation (16-QAM)
A digital modulation technique used for signals in which four bits are modulated at
once by selecting one of 16 possible combinations of carrier phase shift and amplitude.
16-QAM
AT command
A command used to control the modem.
AT command
Binary Phase-Shift Keying (BPSK)
A digital modulation technique used for signals in which one bit is modulated by
selecting one of two possible carrier phase shifts with a 180-phase difference.
BPSK
Carrier Wave (CW)
A single-frequency electromagnetic wave that can be modulated in amplitude, frequency,
or phase to convey information.
CW
Cat-NB1
NB-IoT
User Equipment (UE) category with 200 kHz UE bandwidth and a single RX antenna, specified in 3GPP Release 13.
Cat-NB2
An upgraded version of
Cat-NB1, specified in 3GPP Release 14.
DECT NR+
A non-cellular radio standard included as part of the 5G standards by the
ITU.
DECT NR+
Device Under Test (DUT)
A manufactured product undergoing testing.
DUT
Electronic Serial Number (ESN)
A unique number embedded on a microchip for identifying mobile devices.
ESN
Global Navigation Satellite System (GNSS)
A satellite navigation system with global coverage. The system provides signals from
space transmitting positioning and timing data to GNSS receivers, which use this data to
determine location.
GNSS
General-Purpose Input/Output (GPIO)
A digital signal pin that can be used as input, output, or both. It is uncommitted and can be controlled by the user at runtime.
GPIO
International Mobile (Station) Equipment Identity (IMEI)
A unique code consisting of 14 digits and a check digit for identifying 3GPP-based
mobile devices.
IMEI
International Mobile (Station) Equipment Identity, Software Version
(IMEISV)
A unique code consisting of 16 decimal digits and two software version digits for
identifying 3GPP-based mobile devices.
IMEISV
Internet Protocol (IP)
The network layer communications protocol in the Internet protocol suite for relaying datagrams across network boundaries. Its routing function enables internetworking, and essentially establishes the Internet.
IP
International Reference Alphabet (IRA)
A seven-bit coded character set for information exchange.
IRA
Low-Noise Amplifier (LNA)
In a radio receiving system, an electronic amplifier that amplifies a very low-power
signal without significantly degrading its signal-to-noise ratio.
LNA
Long-Term Evolution (LTE)
A wireless broadband communication standard for mobile devices and data terminals, based on the GSM/EDGE and UMTS/HSPA technologies.
LTE
LTE-M
An open standard that is most suitable for medium throughput applications requiring
low power, low latency, and/or mobility, like asset tracking, wearables, medical, POS, and
home security applications. Also known as Cat-M1.
Non-volatile Memory (NVM)
Memory that can retrieve stored information even after having been
power-cycled.
NVM
One Time Programmable (OTP) memory
A type of non-volatile memory that permits data to be written to memory only
once.
OTP memory
Power Amplifier (PA)
A device used to increase the transmit power level of a radio signal.
PA
Printed Circuit Board (PCB)
A board that connects electronic components.
PCB
Production Test Image (PTI)
A modem firmware version used in the device manufacturing phase.
PTI
Pulse Width Modulation (PWM)
A form of modulation used to represent an analog signal with a binary signal where the
switching frequency is fixed, and all the pulses corresponding to one sample are contiguous
in the digital signal.
PWM
Quadrature Phase-Shift Keying (QPSK)
A digital modulation technique used for signals in which two bits are modulated at
once, selecting one of four possible carrier phase shifts.
QPSK
Resource Block (RB)
The smallest unit of resources that can be allocated to a user.
RB
Signal-to-Noise Ratio (SNR)
The level of signal power compared to the level of noise power, often expressed in
decibels (dB).
SNR
System in Package (SiP)
Several integrated circuits, often from different technologies, enclosed in a single module that performs as a system or subsystem.
SiP
System on Chip (SoC)
A microchip that integrates all the necessary electronic circuits and components of a
computer or other electronic systems on a single integrated circuit.
SoC
User Equipment (UE)
Any device used by an end-user to communicate. The UE consists of the Mobile Equipment
(ME) and the Universal Integrated Circuit Card (UICC).
UE
Unique Slave Identifier (USID)
A unique address for identifying each slave device in an RFFE (RF Front-End)
system.
USID
UUID
Universally Unique Identifier