3 Definitions, symbols, abbreviations and test tolerances
25.1723GPPRelease 17Requirements for support of Assisted Galileo and Additional Navigation Satellite Systems (A-GANSS) Frequency Division Duplex (FDD)TS
3.1 Definitions
For the purposes of the present document, the terms and definitions given in 3GPP TS 25.101 [1], 3GPP TS 25.104 [2] and the following apply:
Horizontal Dilution Of Precision (HDOP): measure of position determination accuracy that is a function of the geometrical layout of the satellites used for the fix, relative to the receiver antenna.
3.2 Symbols
For the purposes of the present document, the following symbol applies:
B1I BeiDou B1I navigation signal with carrier frequency of 1561.098 MHz.
c Speed of light.
E1 Galileo E1 navigation signal with carrier frequency of 1575.420 MHz.
E5 Galileo E5 navigation signal with carrier frequency of 1191.795 MHz.
E6 Galileo E6 navigation signal with carrier frequency of 1278.750 MHz.
G1 GLONASS navigation signal in the L1 sub-bands with carrier frequencies 1602 MHz ± k 562.5 kHz.
G2 GLONASS navigation signal in the L2 sub-bands with carrier frequencies 1246 MHz ± k 437.5 kHz.
k GLONASS channel number, k = -7…13.
L1 C/A GPS or QZSS L1 navigation signal carrying the Coarse/Acquisition code with carrier frequency of 1575.420 MHz.
L1C GPS or QZSS L1 Civil navigation signal with carrier frequency of 1575.420 MHz.
L2C GPS or QZSS L2 Civil navigation signal with carrier frequency of 1227.600 MHz.
L5 GPS or QZSS L5 navigation signal with carrier frequency of 1176.450 MHz.
G Geometry Matrix.
Measured pseudo-range of satellite i of GNSSm.
W Weighting Matrix.
Line of sight unit vector from the user to the satellite i of GNSSm.
State vector of user position and clock bias.
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
A-GANSS Assisted‑Galileo and Additional Navigation Satellite Systems
A‑GNSS Assisted‑GNSS
A-GPS Assisted‑Global Positioning System
AWGN Additive White Gaussian Noise
BDS BeiDou Navigation Satellite System
C/A Coarse/Acquisition
DUT Device Under Test
ECEF Earth-Centered, Earth-Fixed
ECI Earth-Centered-Inertial
FDD Frequency Division Duplex
GEO Geostationary Earth Orbit
GLONASS GLObal’naya NAvigatsionnaya Sputnikovaya Sistema (Engl.: Global Navigation Satellite System)
GNSS Global Navigation Satellite System
GPS Global Positioning System
GSS GNSS System Simulator
HDOP Horizontal Dilution Of Precision
ICD Interface Control Document
IGSO Inclined Geosynchronous Satellite Orbit
IS Interface Specification
LOS Line Of Sight
MEO Medium Earth Orbit
QZS Quasi-Zenith Satellite
QZSS Quasi-Zenith Satellite System
RF Radio Frequency
RRC Radio Resource Control
SBAS Space Based Augmentation System
SFN System Frame Number
SS FDD System Simulator
SV Space Vehicle
TBD To Be Determined
TOD Time Of Day
TOW Time Of Week
TTFF Time To First Fix
UE User Equipment
UTRA Universal Terrestrial Radio Access
UTRAN Universal Terrestrial Radio Access Network
WLS Weighted Least Squares
WGS‑84 World Geodetic System 1984
3.4 Test tolerances
The requirements given in the present document make no allowance for measurement uncertainty. The test specification 3GPP TS 34.172 [12] defines test tolerances. These test tolerances are individually calculated for each test. The test tolerances are then added to the limits in the present document to create test limits. The measurement results are compared against the test limits as defined by the shared risk principle.
Shared Risk is defined in ETR 273-1-2 [15], subclause 6.5.