Content for TR 38.921 Word version: 17.1.0
1 Scope
2 References
3 Definitions of terms, symbols and abbreviations
3.1 Terms
3.2 Symbols
3.3 Abbreviations
...
...
1 Scope p. 7
The present document is a technical report for the study item on IMT parameters for 6.425-7.025GHz, 7.025-7.125GHz and 10.0-10.5GHz [2], covering the study on transmitter and receiver characteristics for both NR BS and NR UE, and related parameters for answering requests from ITU-R WP5D.
2 References p. 7
The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
- References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific.
- For a specific reference, subsequent revisions do not apply.
- For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
[1]
TR 21.905: "Vocabulary for 3GPP Specifications".
[2]
RP-200513: "Study on IMT parameters for 6.425-7.025GHz, 7.025-7.125GHz and 10.0-10.5GHz"
[3]
TS 38.104: "NR; Base Station (BS) radio transmission and reception"
[4]
TS 38.101-1: "NR; User Equipment (UE) radio transmission and reception; Part 1: Range 1 Standalone"
[5]
ITU-R Recommendation SM.329: "Unwanted emissions in the spurious domain"
[6]
ERC Recommendation 74-01, "Unwanted emissions in the spurious domain"
3 Definitions of terms, symbols and abbreviations p. 7
3.1 Terms p. 7
For the purposes of the present document, the terms given in TR 21.905 and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905.
array element:
subdivision of a passive antenna array, consisting of a single radiating element or a group of radiating elements, with a fixed radiation pattern
beamwidth:
beam which has a half-power contour that is essentially elliptical, the half-power beamwidths in the two pattern cuts that respectively contain the major and minor axis of the ellipse
front-to-back ratio:
ratio of maximum directivity of an antenna to its directivity in a specified rearward direction
gain:
ratio of the radiation intensity, in a given direction, to the radiation intensity that would be obtained if the power accepted by the antenna were radiated isotropically
3.2 Symbols p. 8
For the purposes of the present document, the following symbols apply:
A
Peak normalized array element pattern in dB
AA
Composite antenna array pattern in dBi
AE
Array element pattern in dBi
Am
Front to back ratio in dB
dh
Horizontal element separation in meters
dv
Vertical element separation in meters
GE,max
Array element peak gain in dBi
SLAv
Side lobe suppression in dB
φ3dB
Horizonal half power beamwidth
θ3dB
Vertical half power beamwidth
θetilt
Electrical down-tilt angle in degrees (defined from antenna array normal and downwards)
φescan
Electrical scan angle in degrees
φ
Horizontal angle (defined between -180° and 180°).
θ
Vertical angle of the signal direction (defined between -0° and 180°,90° represents the direction perpendicular to the antenna array
NRB
Transmission bandwidth configuration, expressed in resource blocks
3.3 Abbreviations p. 8
For the purposes of the present document, the abbreviations given in TR 21.905 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905.
AAS
Active Antenna System
ACLR
Adjacent Channel Leakage Ratio
ACS
Adjacent Channel Selectivity
AWGN
Additive White Gaussian Noise
BS
Base Station
BW
Bandwidth
FDD
Frequency Division Duplex
FR
Frequency Range
FRC
Fixed Reference Channel
ITU-R
Radiocommunication Sector of the International Telecommunication Union
LA
Local Area
LOS
Line-Of-Sight
MR
Medium Range
NR
New Radio
OTA
Over The Air
O-to-I
Outdoor-to-Indoor
RB
Resource Block
RF
Radio Frequency
SCS
Sub-Carrier Spacing
TDD
Time division Duplex
WA
Wide Area
