6 Conducted transmitter characteristics
36.1083GPPEvolved Universal Terrestrial Radio Access (E-UTRA)Release 18Satellite Access Node radio transmission and receptionTS
6.1 General
Unless otherwise stated, the conducted transmitter characteristics are specified at the TAB connector for SAN type 1-H, with a full complement of transceiver units for the configuration in normal operating conditions.
6.2 Satellite Access Node output power
The SAN conducted output power requirements in clause 6.2 in TS 38.108 [7] apply.
6.3 Output power dynamics
6.3.1 General
The requirements in clause 6.3 apply during the transmitter ON period. Transmit signal quality (as specified in clause 6.5) shall be maintained for the output power dynamics requirements of this Clause.
Power control is used to limit the interference level.
6.3.2 RE power control dynamic range
The SAN RE power control dynamic range requirements in clause 6.3.2 in TS 38.108 [7] apply.
6.3.3 Total power dynamic range
6.3.3.1 General
The SAN total power dynamic range is the difference between the maximum and the minimum transmit power of an OFDM symbol for a specified reference condition.
For SAN type 1-H this requirement shall apply at each TAB connector supporting transmission in the operating band.
NOTE 1: The upper limit of the dynamic range is the OFDM symbol power for a SAN when transmitting on all RBs at maximum output power. The lower limit of the total power dynamic range is the average power for single RB transmission. The OFDM symbol shall carry PDSCH and not contain RS or SSB.
6.3.3.2 Minimum requirement for SAN type 1-H
The downlink (DL) total power dynamic range for each SAN carrier shall be larger than or equal to the level in table 6.3.3.2-1.
Table 6.3.3.2-1: Total power dynamic range
|
SAN channel |
Total power dynamic range (dB) |
|
bandwidth (MHz) |
15 kHz SCS |
|
1.4 |
7.7 |
6.4 Transmit ON/OFF power
The requirement is not applicable in this version of the specification.
6.5 Transmitted signal quality
6.5.1 Frequency error
Frequency error is the measure of the difference between the actual BS transmit frequency and the assigned frequency. The same source shall be used for RF frequency and data clock generation.
6.5.1.1 Minimum requirement
For E-UTRA, the modulated carrier frequency of each E-UTRA carrier configured by the BS shall be accurate to within the accuracy range given in Table 6.5.1-1 observed over a period of one subframe (1ms).
For NB-IoT, the modulated carrier frequency of each NB-IoT carrier configured by the BS shall be accurate to within the accuracy range given in Table 6.5.1-1 observed over a period of one subframe (1ms).
Table 6.5.1-1: Frequency error minimum requirement
|
BS class |
Accuracy |
|
SAN Type 1-H |
±0.05 ppm |
6.5.2 Modulation quality
The EVM quality requirements in clause 6.5.2 in TS 36.104 [8] apply except for 256QAM and 1024QAM.
6.5.3 Time alignment error
The requirement is not applicable in this version of the specification.
6.5.4 DL RS power
DL RS power requirements in clause 6.5.4 in TS 36.104 [8] apply.
6.6 Unwanted emissions
6.6.1 General
General requirements in clause 6.6.1 in TS 38.108 [7] apply.
6.6.2 Occupied bandwidth
6.6.2.1 General
The occupied bandwidth requirements in clause 6.6.2 in TS 38.108 [7] apply.
6.6.3 Adjacent Channel Leakage Power Ratio
6.6.3.1 General
Adjacent Channel Leakage power Ratio (ACLR) is the ratio of the filtered mean power centred on the assigned channel frequency to the filtered mean power centred on an adjacent channel frequency.
The requirements shall apply outside the SAN RF Bandwidth or Radio Bandwidth whatever the type of transmitter considered (single carrier or multi-carrier) and for all transmission modes foreseen by the manufacturer’s specification.
6.6.3.2 Minimum requirement for SAN type 1-H
The ACLR is defined with a square filter of bandwidth equal to the transmission bandwidth configuration of the transmitted signal (BWConfig) centred on the assigned channel frequency and a filter centred on the adjacent channel frequency according to the tables below.
The ACLR shall be higher than the value specified in Table 6.6.3.2-1/2.
Table 6.6.3.2-1: SAN ACLR limit for GEO class
|
SAN channel bandwidth of lowest/highest carrier transmitted BWChannel (MHz) |
SAN adjacent channel centre frequency offset below the lowest or above the highest carrier centre frequency transmitted |
Assumed adjacent channel carrier (informative) |
Filter on the adjacent channel frequency and corresponding filter bandwidth |
ACLR limit |
|
1.4 |
BWChannel |
E-UTRA of same BW |
Square (BWConfig) (NOTE 1) |
14 |
|
2 x BWChannel |
E-UTRA of same BW |
Square (BWConfig) (NOTE 1) |
14 |
|
|
NOTE 1: BWChannel and BWConfig are the SAN channel bandwidth and transmission bandwidth configuration of the lowest/highest carrier transmitted on the assigned channel frequency. |
||||
Table 6.6.3.2-2: SAN ACLR limit for LEO class
|
SAN channel bandwidth of lowest/highest carrier transmitted BWChannel (MHz) |
SAN adjacent channel centre frequency offset below the lowest or above the highest carrier centre frequency transmitted |
Assumed adjacent channel carrier (informative) |
Filter on the adjacent channel frequency and corresponding filter bandwidth |
ACLR limit |
|
1.4 |
BWChannel |
E-UTRA of same BW |
Square (BWConfig) (NOTE 1) |
24 |
|
2 x BWChannel |
E-UTRA of same BW |
Square (BWConfig) (NOTE 1) |
[24] |
|
|
NOTE 1: BWChannel and BWConfig are the SAN channel bandwidth and transmission bandwidth configuration of the lowest/highest carrier transmitted on the assigned channel frequency. |
||||
For SAN supporting standalone NB-IoT operation in paired spectrum, the ACLR shall be higher than the value specified in Table 6.6.3.2-3 and Table 6.6.3.2-4.
Table 6.6.3.2-3: ACLR limit of SAN supporting standalone NB-IoT operation for GEO class
|
Channel bandwidth of NB-IoT lowest/highest carrier transmitted BWChannel [kHz] |
BS adjacent channel centre frequency offset below the lowest or above the highest carrier centre frequency transmitted |
Assumed adjacent channel carrier (informative) |
Filter on the adjacent channel frequency and corresponding filter bandwidth |
ACLR limit |
|
200 |
[200 kHz] |
Standalone NB-IoT |
Square (180 kHz) |
14 |
|
[400 kHz] |
Standalone NB-IoT |
Square (180 kHz) |
14 |
Table 6.6.3.2-4: ACLR limit of SAN supporting standalone NB-IoT operation for LEO class
|
Channel bandwidth of NB-IoT lowest/highest carrier transmitted BWChannel [kHz] |
BS adjacent channel centre frequency offset below the lowest or above the highest carrier centre frequency transmitted |
Assumed adjacent channel carrier (informative) |
Filter on the adjacent channel frequency and corresponding filter bandwidth |
ACLR limit |
|
200 |
[200 kHz] |
Standalone NB-IoT |
Square (180 kHz) |
24 |
|
[400 kHz] |
Standalone NB-IoT |
Square (180 kHz) |
24 |
6.6.4 Operating band unwanted emissions
6.6.4.1 General
Unless otherwise stated, the operating band unwanted emission (OBUE) limits for SAN are defined from channel edge up to frequencies separated from the channel edge by 200% of the necessary bandwidth.
The requirements shall apply whatever the type of transmitter considered and for all transmission modes foreseen by the manufacturer’s specification.
Basic limits are specified in the tables below, where:
– Δf is the separation between the channel edge frequency and the nominal -3dB point of the measuring filter closest to the carrier frequency.
– f_offset is the separation between the channel edge frequency and the centre of the measuring filter.
– PSDchannel represents the Power Spectral Density of the channel for a given channel bandwidth
– BWChannel is the considered E-UTRA channel bandwidth or SAN total RF bandwidth for a given operating band.
– is the SAN class parameter in dB identified to characterize different SAN classes.
For a multi-carrier single-band connector the definitions above apply to the lower edge of the carrier transmitted at the lowest carrier frequency and the upper edge of the carrier transmitted at the highest carrier frequency within a specified frequency band.
– The operating band unwanted emission basic limits of the band where there are carriers transmitted, as defined in the tables of the present clause for the largest frequency offset (Δfmax), shall apply from channel edge up to frequencies separated from the channel edge by 200% of the necessary bandwidth.
6.6.4.2 Minimum requirements for SAN type 1-H
For SAN operating in Bands 256, 255, the requirements are specified in table 6.6.4.2-1 for GEO and LEO class respectively, in line with Annex 5 of ITU recommendation SM.1541-6 [6].
The SAN Operating Band Unwanted Emissions (OBUE) requirements for GEO and LEO classes are therefore defined as described in Table 6.6.4.2‑1 below.
Table 6.6.4.2-1: SAN LEO and GEO Classes OBUE basic limits
|
Frequency offset of measurement filter ‑3dB point, Δf |
Frequency offset of measurement filter centre frequency, f_offset |
Basic limits (dBm) |
Measurement bandwidth |
|
0 MHz ≤ Δf < 2× BWChannel |
0.002 MHz ≤ f_offset < 2× BWChannel + 0.002 MHz |
4 kHz |
|
|
NOTE 1: PSDchannel = Prated,c, sys – 10log10(BWChannel) – 24, unit dBm/4kHz. NOTE 2: SE limit is spurious emission limit specified in spurious emission clause 6.6.5. NOTE 3: PSD attenuation as in ITU-R SM.1541-6 [9], Annex 5 OoB domain emission limits for space services. NOTE 4: =0 dB for GEO class and =3 dB for LEO class. |
|||
6.6.5 Transmitter spurious emissions
6.6.5.1 General
The transmitter spurious emission limits shall apply from 30 MHz to the fifth harmonic of the upper frequency edge of the DL operating band, excluding the frequency range from ΔfOBUE below the lowest frequency of each supported downlink operating band, up to ΔfOBUE above the highest frequency of each supported downlink operating band, where the ΔfOBUE is defined in table 6.6.1-1. For some operating bands, the upper limit is higher than 12.75 GHz in order to comply with the 5th harmonic limit of the downlink operating band, as specified in ITU-R recommendation SM.329 [2].
The requirements shall apply to SAN that supports E-UTRA or NB-IoT standalone operation.
The requirements shall apply whatever the type of transmitter considered (single carrier or multi-carrier). It applies for all transmission modes foreseen by the manufacturer’s specification.
Unless otherwise stated, all requirements are measured as mean power (RMS).
6.6.5.2 Basic Limits
6.6.5.2.1 General transmitter spurious emissions requirements
The basic limits of table 6.6.5.2.1-1 shall apply. The application of those limits shall be the same as for operating band unwanted emissions in clause 6.6.4.
Table 6.6.5.2.1-1: General SAN transmitter spurious emission limits
|
Spurious frequency range |
Prated,c,sys |
Basic limit |
Measurement bandwidth |
Notes |
|
30 MHz – 5th harmonic of the upper frequency edge of the DL operating band |
≤ 47 dBm |
-13 dBm |
4 kHz |
NOTE 1, NOTE 2, NOTE 3 |
|
> 47 dBm |
Prated,c,sys – 60 dBm |
|||
|
NOTE 1: Measurement bandwidths as in ITU-R SM.329 [2], s4.1. NOTE 2: Upper frequency as in ITU-R SM.329 [2], s2.5 table 1. NOTE 3: The lower frequency limit is replaced by 0.7 times the waveguide cut-off frequency, according to ITU-R SM.329 [2], for systems having an integral antenna incorporating a waveguide section, or with an antenna connection in such form, and of unperturbed length equal to at least twice the cut-off. |
||||
6.6.5.2.2 Protection of the own Satellite Access Node receiver
This requirement shall be applied for E-UTRA FDD operation in order to prevent the receivers of the SAN being de-sensitized by emissions from its own SAN transmitter. It is measured at the TAB connector for hybrid AAS SAN for any type of SAN which has common or separate Tx/Rx TAB connectors.
The spurious emission basic limits are provided in table 6.6.5.2.2-1.
Table 6.6.5.2.2-1: SAN spurious emissions basic limits for protection of the SAN receiver
|
Frequency range |
Basic limits |
Measurement bandwidth |
|
FUL,low – FUL,high |
-96 dBm |
100 kHz |
6.6.5.2.3 Additional spurious emissions requirements
The additional spurious emissions requirement is not applicable for SAN.
6.7 Transmitter intermodulation
The requirement is not applicable in this version of the specification.