AirHarmony-4400 (External Cavity Filters) Installation Guide
UGD-D01186
Airspan Commercial and Internal Use
55
B
Abbreviations
Term
Expansion
3GPP
3rd Generation Partnership Project, responsible for LTE
ABS
Almost Blank Subframes
ACS
Adjacent Channel Selectivity is a measurement of a receiver's ability to process a desired
signal while rejecting a strong signal in an adjacent frequency channel. ACS is defined as the
ratio of the receiver filter attenuation on the assigned channel frequency to the receiver
filter attenuation on the adjacent channel frequency.
AWGN
Additive White Gaussian Noise is a channel model in which the only impairment to
communication is a linear addition of white noise with a constant spectral density and a
Gaussian distribution of amplitude.
BER
Bit Error Rate
CN
Core Network
CP
Cyclic Prefix
CTC
Convolution Turbo Code is a high-performance forward error correction (FEC) code
dB
Decibel. A logarithmic unit used to describe a ratio (such as power ratio in radio
telecommunications)
dBm
An abbreviation for the power ratio in decibels (dB) of the measured power referenced to
one
(mW). It is used as a convenient measure of absolute power because of its
capability to express both very large and very small values in a short form.
eNodeB
Evolved Node B, is the element in
ESP
Encapsulating Security Payloads (ESP) provide confidentiality, data-origin authentication,
connectionless integrity, an anti-replay service (a form of partial sequence integrity), and
limited traffic-flow confidentiality
E-UTRAN
Evolved UMTS Terrestrial Radio Access Network, is the air interface of 3GPP's Long Term
Evolution.
EVM/RCE
The Error Vector Magnitude or EVM (sometimes also called Receive Constellation Error or
RCE) is a measure used to quantify the performance of a digital radio transmitter or receiver.
It is measured in dB or percentage (%) – the lower the better.
FDD
Frequency-Division Duplexing. A transceiver mode where the transmitter and receiver
operate at different carrier frequencies.
GNSS
Global Navigation Satellite System is a term used to describe a satellite navigation system
with global coverage. There are currently two fully operational GNSSs – the US GPS and the
Russian GLONASS
GTP-U
GPRS Tunneling Protocol for User data is a relatively simple IP based tunneling protocol
which permits many tunnels between each set of end points
HPBW
Half Power BandWidth is the angular separation in an antenna, in which the magnitude of
the radiation pattern decreases by 50% (or -3 dB) from the peak of the main beam
ICS
In-channel selectivity is a measure of the receiver’s ability to receive a wanted signal at its
assigned Resource Block locations in the presence of an interfering signal
IPSec
Internet Protocol Security is a protocol suite for securing Internet Protocol (IP)
communications by authenticating and encrypting each IP packet of a communication
session
LED
Light Emitting Diode
LTE
Long Term Evolution
MAC
Medium Access Controller – responsible for several functions such Error Correction, Packet
(De)Multiplexing, etc…
MBSFN
Multicast-Broadcast Single Frequency Network is an LTE feature designed to deliver services
such as Mobile TV using the LTE infrastructure, and is expected to be a competitor to DVB-H-
based TV broadcast
MCS
Modulation and Coding Scheme
