Acronyms
Rev 2 Feb.13
Proprietary and Confidential - Contents subject to change
25
QOS
Quality of Service
QPSK
Quadrature Phase-Shift Keying
QPST
Qualcomm Product Support Tools
RAT
Radio Access Technology
RF
Radio Frequency
RI
Ring Indicator
roaming
A cellular subscriber is in an area where service is obtained from a cellular service
provider that is not the subscriber’s provider.
RSE
Radiated Spurious Emissions
RSSI
Received Signal Strength Indication
SDK
Software Development Kit
SED
Smart Error Detection
Sensitivity
(Audio)
Measure of lowest power signal that the receiver can measure.
Sensitivity (RF)
Measure of lowest power signal at the receiver input that can provide a prescribed
BER / BLER / SNR value at the receiver output.
SG
An LTE signaling interface for SMS (“SMS over SGs”)
SIB
System Information Block
SIM
Subscriber Identity Module. Also referred to as USIM or UICC.
SIMO
Single Input Multiple Output—smart antenna technology that uses a single
antenna at the transmitter side and multiple antennas at the receiver side. This
improves performance and security.
SISO
Single Input Single Output—antenna technology that uses a single antenna at
both the transmitter side and the receiver side.
SKU
Stock Keeping Unit—identifies an inventory item: a unique code, consisting of
numbers or letters and numbers, assigned to a product by a retailer for purposes
of identification and inventory control.
SMS
Short Message Service.
A feature that allows users of a wireless device on a wireless network to receive
or transmit short electronic alphanumeric messages (up to 160 characters,
depending on the service provider).
S/N
Signal-to-noise (ratio)
SNR
Signal-to-Noise Ratio
SOF
Start of Frame — A USB function.
SSS
Secondary synchronisation signal.
Table 5-1: Acronyms and definitions (Continued)
Acronym or term
Definition
