6.6.4 Adjacent Channel Leakage Power Ratio (ACLR)
37.1413GPPMulti-Standard Radio (MSR) Base Station (BS) conformance testingNR, E-UTRA, UTRA and GSM/EDGERelease 17TS
6.6.4.1 Definition and applicability
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.
6.6.4.2 Minimum requirement
The minimum requirement is in TS 37.104 [2] clause 6.6.4.
6.6.4.3 Test purpose
To verify that the adjacent channel leakage power ratio requirement shall be met as specified by the minimum requirement.
6.6.4.4 Method of test
For this requirement Tables 5.1-1 and 5.2-1 also refer to single-RAT specifications for UTRA; see clause 5. The following shall apply for references to UTRA single-RAT specifications:
– For references to TS 25.141 [10], the method of test is specified in TS 25.141 [10], clause 6.5.2.2.4.
– For references to TS 25.142 [12], the method of test is specified in TS 25.142 [12], clause 6.6.2.2.4.
For NR and E-UTRA ACLR requirement outside the Base Station RF Bandwidth edges and the ACLR requirement applied inside sub-block gap, in addition, for non-contiguous spectrum operation or Inter RF Bandwidth gap for multi-band operation using, the test configurations defined in clause 4.8, the method of test described in clauses 6.6.4.4.1 and 6.6.4.4.2 applies.
6.6.4.4.1 Initial conditions
Test environment: normal; see Annex B.2.
Base Station RF Bandwidth positions to be tested: BRFBW, MRFBW and TRFBW in single-band operation; see clause 4.9.1; BRFBW_T’RFBW and B’RFBW_TRFBW in multi-band operation, see clause 4.9.1.
1) Connect the signal analyzer to the Base Station antenna connector as shown in Annex D.1.1.
2) The measurement device characteristics shall be:
– measurement filter bandwidth: defined in clause 6.6.4.5;
– detection mode: true RMS voltage or true average power.
The emission power should be averaged over an appropriate time duration to ensure the measurement is within the measurement uncertainty in Table 4.1.2-1.
6.6.4.4.2 Procedure
1) Set the Base Station to transmit at maximum power according to the applicable test configuration in clause 5 using the corresponding test models or set of physical channels in clause 4.9.2.
2) For E-UTRA with NB-IoT (in-band and/or guard band operation), measure ACLR outside the Base Station RF Bandwidth edges and ACLR inside sub-block gap or Inter RF Bandwidth gap, in addition, for non-contiguous spectrum operation as specified in clause 6.6.4.5.1. For NB-IoT stand-alone operation, measure ACLR as specified in clause 6.6.4.5.5. For NR, measure ACLR outside the Base Station RF Bandwidth edges and ACLR inside sub-block gap or Inter RF Bandwidth gap, in addition, for non-contiguous spectrum operation as specified in clause 6.6.4.5.6.
3) For UTRA FDD, measure ACLR inside sub-block gap or Inter RF Bandwidth gap as specified in clause 6.6.4.5.2.
4) Measure Cumulative Adjacent Channel Leakage Power Ratio (CACLR) inside sub-block gap or the Inter RF Bandwidth gap as specified in clause 6.6.4.5.4.
In addition, for a multi-band capable BS, the following step shall apply:
5) For multi-band capable BS and single band tests, repeat the steps above per involved band where single band test configurations and test models shall apply with no carrier activated in the other band. For multi-band capable BS with separate antenna connector, the antenna connector not being under test in case of SBT or MBT shall be terminated.
6.6.4.5 Test requirements
6.6.4.5.1 E-UTRA test requirement
For E-UTRA, the test requirement is specified in Tables 6.6.4.5.1-1 and 6.6.4.5.1-2, and applies outside the Base Station RF Bandwidth or Maximum Radio Bandwidth.
For a BS operating in non-contiguous spectrum, the ACLR also applies for the first adjacent channel inside any sub-blockgap with a gap size Wgap ≥ 15MHz. The ACLR requirement for the second adjacent channel applies inside any sub-block gap with a gap size Wgap ≥ 20 MHz. The CACLR test requirement in clause 6.6.4.5.4 applies in sub block gaps for the frequency ranges defined in Table 6.6.4.5.4-1.
For a BS operating in multiple bands, where multiple bands are mapped onto the same antenna connector, the ACLR also applies for the first adjacent channel inside any Inter RF Bandwidth gap with a gap size Wgap ≥ 15MHz. The ACLR requirement for the second adjacent channel applies inside any Inter RF Bandwidth gap with a gap size Wgap ≥ 20 MHz. The CACLR requirement in clause 6.6.4.5.4 applies in Inter RF Bandwidth gaps for the frequency ranges defined in Table 6.6.4.5.4-1.
The requirement applies during the transmitter on period.
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 centered on the adjacent channel frequency according to the tables below.
For Category A Wide Area BS, either the ACLR limits in the tables below or the absolute limit of -13dBm/MHz shall apply, whichever is less stringent.
For Category B Wide Area BS, either the ACLR limits in the tables below or the absolute limit of -15 dBm/MHz shall apply, whichever is less stringent.
For Medium Range BS, either the ACLR limits in the tables below or the absolute limit of -25 dBm/MHz shall apply, whichever is less stringent.
For Local Area BS, either the ACLR limits in the tables below or the absolute limit of -32dBm/MHz shall apply, whichever is less stringent.
For operation in paired spectrum, the ACLR shall be higher than the value specified in Table 6.6.4.5.1-1.
Table 6.6.4.5.1-1: Base Station ACLR in paired spectrum
|
Channel bandwidth of E-UTRA Lowest/ Highest Carrier transmitted BWChannel [MHz] |
BS adjacent channel centre frequency offset below the lower or above the upper Base Station RF Bandwidth edge |
Assumed adjacent channel carrier |
Filter on the adjacent channel frequency and corresponding filter bandwidth |
ACLR limit |
|
0.5 x BWChannel |
E-UTRA of same BW |
Square (BWConfig) |
44.2 dB |
|
|
1.4, 3.0, 5, 10, 15, 20 |
1.5 x BWChannel |
E-UTRA of same BW |
Square (BWConfig) |
44.2 dB |
|
2.5 MHz |
3.84 Mcps UTRA |
RRC (3.84 Mcps) |
44.2 dB |
|
|
7.5 MHz |
3.84 Mcps UTRA |
RRC (3.84 Mcps) |
44.2 dB |
|
|
NOTE 1: BWChannel and BWConfig are the channel bandwidth and transmission bandwidth configuration of the E-UTRA Lowest/Highest Carrier transmitted on the assigned channel frequency. NOTE 2: The RRC filter shall be equivalent to the transmit pulse shape filter defined in TS 25.104 [3], with a chip rate as defined in this table. |
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For operation in unpaired spectrum, the ACLR shall be higher than the value specified in Table 6.6.4.5.1‑2.
Table 6.6.4.5.1-2: Base Station ACLR in unpaired spectrum with synchronized operation
|
Channel bandwidth of E-UTRA Lowest/ Highest Carrier transmitted BWChannel [MHz] |
BS adjacent channel centre frequency offset below the lower or above the upper Base StationRF Bandwidth edge |
Assumed adjacent channel carrier |
Filter on the adjacent channel frequency and corresponding filter bandwidth |
ACLR limit |
|
0.5 x BWChannel |
E-UTRA of same BW |
Square (BWConfig) |
44.2 dB |
|
|
1.4, 3 |
1.5 x BWChannel |
E-UTRA of same BW |
Square (BWConfig) |
44.2 dB |
|
0.8 MHz |
1.28 Mcps UTRA |
RRC (1.28 Mcps) |
44.2 dB |
|
|
2.4 MHz |
1.28 Mcps UTRA |
RRC (1.28 Mcps) |
44.2 dB |
|
|
0.5 x BWChannel |
E-UTRA of same BW |
Square (BWConfig) |
44.2 dB |
|
|
1.5 x BWChannel |
E-UTRA of same BW |
Square (BWConfig) |
44.2 dB |
|
|
0.8 MHz |
1.28 Mcps UTRA |
RRC (1.28 Mcps) |
44.2 dB |
|
|
5, 10, 15, 20 |
2.4 MHz |
1.28 Mcps UTRA |
RRC (1.28 Mcps) |
44.2 dB |
|
2.5 MHz |
3.84 Mcps UTRA |
RRC (3.84 Mcps) |
44.2 dB |
|
|
7.5 MHz |
3.84 Mcps UTRA |
RRC (3.84 Mcps) |
44.2 dB |
|
|
5 MHz |
7.68 Mcps UTRA |
RRC (7.68 Mcps) |
44.2 dB |
|
|
15 MHz |
7.68 Mcps UTRA |
RRC (7.68 Mcps) |
44.2 dB |
|
|
NOTE 1: BWChannel and BWConfig are the channel bandwidth and transmission bandwidth configuration of the E-UTRA Lowest/Highest Carrier transmitted on the assigned channel frequency. NOTE 2: The RRC filter shall be equivalent to the transmit pulse shape filter defined in TS 25.105 [4], with a chip rate as defined in this table. |
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For operation in non-contiguous paired spectrum, the ACLR shall be higher than the value specified in Table 6.6.4.5.1‑3.
Table 6.6.4.5.1-3: Base Station ACLR in non-contiguous paired spectrum
|
Sub-block gap size (Wgap) where the limit applies |
BS adjacent channel centre frequency offset below or above the sub-block edge (inside the gap) |
Assumed adjacent channel carrier |
Filter on the adjacent channel frequency and corresponding filter bandwidth |
ACLR limit |
|
Wgap ≥ 15 MHz |
2.5 MHz |
3.84 Mcps UTRA |
RRC (3.84 Mcps) |
44.2 dB |
|
Wgap ≥ 20 MHz |
7.5 MHz |
3.84 Mcps UTRA |
RRC (3.84 Mcps) |
44.2 dB |
|
NOTE: The RRC filter shall be equivalent to the transmit pulse shape filter defined in TS 25.104 [3], with a chip rate as defined in this table. |
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For operation in non-contiguous unpaired spectrum, the ACLR shall be higher than the value specified in Table 6.6.4.5.1‑4.
Table 6.6.4.5.1-4: Base Station ACLR in non-contiguous unpaired spectrum
|
Sub-block gap size (Wgap) where the limit applies |
BS adjacent channel centre frequency offset below or above the sub-block edge (inside the gap) |
Assumed adjacent channel carrier |
Filter on the adjacent channel frequency and corresponding filter bandwidth |
ACLR limit |
|
Wgap ≥ 15 MHz |
2.5 MHz |
5MHz E-UTRA |
Square (BWConfig) |
44.2 dB |
|
Wgap ≥ 20 MHz |
7.5 MHz |
5MHz E-UTRA |
Square (BWConfig) |
44.2 dB |
6.6.4.5.2 UTRA FDD test requirement
For UTRA FDD, the test requirement is specified in TS 25.141 [10] clause 6.5.2.2.5, and applies outside the Base Station RF Bandwidth or Maximum Radio Bandwidth.
For a BS operating in non-contiguous spectrum, ACLR requirement also applies for the first adjacent channel, inside any sub-block gap with a gap size Wgap ≥ 15 MHz. The ACLR requirement for the second adjacent channel applies inside any sub-block gap with a gap size Wgap ≥ 20 MHz. The CACLR test requirement in clause 6.6.4.5.4 applies in sub block gaps for the frequency ranges defined in Table 6.6.4.5.4-1.
For a BS operating in multiple bands, where multiple bands are mapped onto the same antenna connector, ACLR requirement also applies for the first adjacent channel, inside any Inter RF Bandwidth gap with a gap size Wgap ≥ 15 MHz. The ACLR requirement for the second adjacent channel applies inside any Inter RF Bandwidth gap with a gap size Wgap ≥ 20 MHz. The CACLR requirement in clause 6.6.4.5.4 applies in Inter RF Bandwidth gaps for the frequency ranges defined in Table 6.6.4.5.4-1.
6.6.4.5.3 UTRA TDD test requirement
For UTRA TDD, the test requirement is specified in TS 25.142 [12] clause 6.6.2.2.5, and applies outside the Base Station RF Bandwidth or Maximum Radio Bandwidth.
6.6.4.5.4 Cumulative ACLR requirement in non-contiguous spectrum
The following test requirement applies for sub-block or Inter RF Bandwidth gap sizes listed in Table 6.6.4.5.4-1,
– Inside a sub-block gap within an operating band for a BS operating in non-contiguous spectrum.
– Inside an Inter RF Bandwidth gap for a BS operating in multiple bands, where multiple bands are mapped on the same antenna connector.
The Cumulative Adjacent Channel Leakage Power Ratio (CACLR) in a sub-block gap or the Inter RF Bandwidth gap is the ratio of
a) the sum of the filtered mean power centred on the assigned channel frequencies for the two carriers adjacent to each side of the sub-block gap or the Inter RF Bandwidth gap, and
b) the filtered mean power centred on a frequency channel adjacent to one of the respective sub-block edges or Base Station RF Bandwidth edges.
The requirement applies to adjacent channels of NR, E-UTRA or UTRA carriers allocated adjacent to each side of the sub-block gap or the Inter RF Bandwidth gap. The assumed filter for the adjacent channel frequency is defined in Table 6.6.4.5.4-1 and the filters on the assigned channels are defined in Table 6.6.4.5.4-2.
NOTE: If the RAT on the assigned channel frequencies is different, the filters used are also different.
For Wide Area Category A BS, either the CACLR limits in Table 6.6.4.5.4-1 or the absolute limit of -13dBm/MHz shall apply, whichever is less stringent.
For Wide Area Category B BS, either the CACLR limits in Table 6.6.4.5.4-1 or the absolute limit of -15dBm/MHz shall apply, whichever is less stringent.
For Medium Range BS, either the CACLR limits in Table 6.6.4.4-1 or the absolute limit of -25 dBm/MHz shall apply, whichever is less stringent.
For Local Area BS, either the CACLR limits in Table 6.6.4.4-1 or the absolute limit of -32 dBm/MHz shall apply, whichever is less stringent.
The CACLR for E-UTRA and UTRA carriers located on either side of the sub-block gap or the Inter RF Bandwidth gap shall be higher than the value specified in Table 6.6.4.5.4-1.
Table 6.6.4.5.4-1: Base Station CACLR in non-contiguous spectrum or multiple bands
|
Band Category |
Sub-block or Inter RF Bandwidth gap size (Wgap) where the limit applies (MHz) |
BS adjacent channel centre frequency offset below or above the sub-block edge or the Base Station RF Bandwidth edge (inside the gap) |
Assumed adjacent channel carrier (informative) |
Filter on the adjacent channel frequency and corresponding filter bandwidth |
CACLR limit |
|
BC1, BC2 |
5 ≤ Wgap < 15 (Note 3) |
2.5 MHz |
3.84 Mcps UTRA |
RRC (3.84 Mcps) |
44.2 dB |
|
BC1, BC2 |
10 ≤ Wgap < 20 (Note 3) |
7.5 MHz |
3.84 Mcps UTRA |
RRC (3.84 Mcps) |
44.2 dB |
|
BC3 |
5 ≤ Wgap < 15 (Note 3) |
2.5 MHz |
5MHz E-UTRA |
Square (BWConfig) |
44.2 dB |
|
BC3 |
10 < Wgap < 20 (Note 3) |
7.5 MHz |
5MHz E-UTRA |
Square (BWConfig) |
44.2 dB |
|
BC1, BC2, BC3 |
5 ≤ Wgap < 45 (Note 4) |
2.5 MHz |
5 MHz NR (Note 2) |
Square (BWConfig) |
44.2 dB |
|
BC1, BC2, BC3 |
10 ≤ Wgap < 50 (Note 4) |
7.5 MHz |
5 MHz NR (Note 2) |
Square (BWConfig) |
44.2 dB |
|
BC1, BC2, BC3 |
20 ≤ Wgap < 30 (Note 3, 5) |
10 MHz |
20 MHz NR (Note 2) |
Square (BWConfig) |
44.2 dB |
|
BC1, BC2, BC3 |
20 ≤ Wgap < 60 (Note 4) |
10 MHz |
20 MHz NR (Note 2) |
Square (BWConfig) |
44.2 dB |
|
BC1, BC2, BC3 |
40 ≤ Wgap < 50 (Note 3, 5) |
30 MHz |
20 MHz NR (Note 2) |
Square (BWConfig) |
44.2 dB |
|
BC1, BC2, BC3 |
40 ≤ Wgap < 80 (Note 4) |
30 MHz |
20 MHz NR (Note 2) |
Square (BWConfig) |
44.2 dB |
|
NOTE 1: For BC1 and BC2 the RRC filter shall be equivalent to the transmit pulse shape filter defined in TS 25.104 [3], with a chip rate as defined in this table. NOTE 2: With SCS that provides largest transmission bandwidth configuration (BWConfig). NOTE 3: Applicable in case the channel bandwidth of the carrier transmitted at the other edge of the gap is 5, 10, 15, 20 MHz. NOTE 4: Applicable in case the channel bandwidth of the NR carrier transmitted at the other edge of the gap is 25, 30, 40, 50, 60, 70, 80, 90, 100 MHz. NOTE 5: Applicable in case the channel bandwidth of the lowest/highest NR carrier transmitted is 25, 30, 40, 50, 60, 70, 80, 90, 100 MHz. |
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Table 6.6.4.5.4-2: Filter parameters for the assigned channel
|
RAT of the carrier adjacent to the sub-block or Inter RF Bandwidth gap |
Filter on the assigned channel frequency and corresponding filter bandwidth |
|
E-UTRA |
E-UTRA of same BW |
|
UTRA FDD |
RRC (3.84 Mcps) |
|
NR |
NR of same BW with SCS that provides largest transmission bandwidth configuration |
|
NOTE: The RRC filter shall be equivalent to the transmit pulse shape filter defined in TS 25.104 [3], with a chip rate as defined in this table. |
|
6.6.4.5.5 NB-IoT test requirement
For NB-IoT in-band and guard band operation, the E-UTRA minimum requirement specified in clause 6.6.4.5.1 shall apply.
For NB-IoT operation in NR in-band, the NR minimum requirement specified in clause 6.6.4.5.6 shall apply.
For NB-IoT standalone operation, the ACLR shall be higher than the value specified in Table 6.6.4.5.5-1.
Table 6.6.4.5.5-1: Base Station ACLR for NB-IoT standalone operation
|
Channel bandwidth of standalone NB-IoT lowest/highest carrier transmitted BWChannel |
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 kHz |
300 kHz |
Standalone NB-IoT |
Square (BWConfigl) |
39.2 dB |
|
500 kHz |
Standalone NB-IoT |
Square (BWConfig) |
49.2 dB |
|
|
NOTE 1: BWConfig is the transmission bandwidth configuration of the E-UTRA Lowest/Highest Carrier transmitted on the assigned channel frequency. |
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6.6.4.5.6 NR test requirement
For NR, the requirements shall apply outside the Base Station 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.
For a BS operating in non-contiguous spectrum, the ACLR requirement shall apply in sub-block gaps for the frequency ranges defined in table 6.6.4.5.6-2a, while the CACLR requirement shall apply in sub-block gaps for the frequency ranges defined in table 6.6.4.5.4-1.
For BS operating in multiple bands, where multiple bands are mapped onto the same antenna connector, the ACLR requirement shall apply in Inter RF Bandwidth gaps for the frequency ranges defined in table 6.6.4.5.6-2a, while the CACLR requirement in clause 6.6.4.5.4 shall apply in Inter RF Bandwidth gaps for the frequency ranges defined in table 6.6.4.5.4-1.
The requirement shall apply during the transmitter ON period. 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 absolute limit in table 6.6.4.5.6-2 or the ACLR (CACLR) limit in table 6.6.4.5.6-1, 6.6.4.5.6-2a or 6.6.4.5.4-1, whichever is less stringent, shall apply for each antenna connector.
For Band 41 operation in Japan, absolute ACLR limits shall be applied to the sum of the absolute ACLR power over all antenna connectors.
For operation in paired and unpaired spectrum, the ACLR shall be higher than the value specified in table 6.6.4.5.6‑1.
Table 6.6.4.5.6-1: Base station ACLR limit
|
Channel bandwidth of lowest/highest NR carrier transmitted BWChannel [MHz] |
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 |
|
BWChannel |
NR of same BW (Note 2) |
Square (BWConfig) |
44.2 dB |
|
|
2 x BWChannel |
NR of same BW (Note 2) |
Square (BWConfig) |
44.2 dB |
|
|
5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 60, 70, 80, 90,100 |
BWChannel /2 + 2.5 MHz |
5 MHz E-UTRA |
Square (4.5 MHz) |
44.2 dB (Note 3) |
|
BWChannel /2 + 7.5 MHz |
5 MHz E-UTRA |
Square (4.5 MHz) |
44.2 dB (Note 3) |
|
|
NOTE 1: BWChannel and BWConfig are the channel bandwidth and transmission bandwidth configuration of the lowest/highest NR carrier transmitted on the assigned channel frequency. NOTE 2: With SCS that provides largest transmission bandwidth configuration (BWConfig). NOTE 3: The requirements are applicable when the band is also defined for E-UTRA or UTRA. |
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The ACLR absolute limit is specified in table 6.6.4.5.6‑2.
Table 6.6.4.5.6-2: Base station ACLR absolute limit
|
BS category / BS class |
ACLR absolute limit |
|
Category A Wide Area BS |
-13 dBm/MHz |
|
Category B Wide Area BS |
-15 dBm/MHz |
|
Medium Range BS |
-25 dBm/MHz |
|
Local Area BS |
-32 dBm/MHz |
For operation in non-contiguous spectrum or multiple bands, the ACLR shall be higher than the value specified in Table 6.6.4.5.6‑2a.
Table 6.6.4.5.6-2a: Base Station ACLR limit in non-contiguous spectrum or multiple bands
|
Channel bandwidth of lowest/highest NR carrier transmitted BWChannel [MHz] |
Sub-block or Inter RF Bandwidth gap size (Wgap) where the limit applies [MHz] |
BS adjacent channel centre frequency offset below or above the sub-block or Base Station RF Bandwidth edge (inside the gap) |
Assumed adjacent channel carrier |
Filter on the adjacent channel frequency and corresponding filter bandwidth |
ACLR limit |
|
5, 10, 15, 20 |
Wgap ≥ 15 (Note 3) Wgap ≥ 45 (Note 4) |
2.5 MHz |
5 MHz NR (Note 2) |
Square (BWConfig) |
44.2 dB |
|
Wgap ≥ 20 (Note 3) Wgap ≥ 50 (Note 4) |
7.5 MHz |
5 MHz NR (Note 2) |
Square (BWConfig) |
44.2 dB |
|
|
25, 30, 35, 40, 45, 50, 60, 70, 80, 90, 100 |
Wgap ≥ 60 (Note 4) Wgap ≥ 30 (Note 3) |
10 MHz |
20 MHz NR (Note 2) |
Square (BWConfig) |
44.2 dB |
|
Wgap ≥ 80 (Note 4) Wgap ≥ 50 (Note 3) |
30 MHz |
20 MHz NR (Note 2) |
Square (BWConfig) |
44.2 dB |
|
|
NOTE 1: BWConfig is the transmission bandwidth configuration of the assumed adjacent channel carrier. NOTE 2: With SCS that provides largest transmission bandwidth configuration (BWConfig). NOTE 3: Applicable in case the channel bandwidth of the carrier transmitted at the other edge of the gap is 5, 10, 15, 20 MHz. NOTE 4: Applicable in case the channel bandwidth of the NR carrier transmitted at the other edge of the gap is 25, 30, 35, 40, 45, 50, 60, 70, 80, 90, 100 MHz. |
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