6.6.2 Adjacent Channel Leakage power Ratio (ACLR)
36.1413GPPBase Station (BS) conformance testingEvolved Universal Terrestrial Radio Access (E-UTRA)Release 17TS
6.6.2.1 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.
The requirements shall apply outside the Base Station RF Bandwidth or Maximum Radio Bandwidth whatever the type of transmitter considered (single carrier, multi-carrier and/or CA) and for all transmission modes foreseen by the manufacturer’s specification.
For a BS operating in non-contiguous spectrum, the ACLR also applies for the first adjacent channel inside any sub-block gap with a gap size Wgap ≥ 15MHz or Wgap ≥ 60MHz for Band 46. The ACLR requirement for the second adjacent channel applies inside any sub-block gap with a gap size Wgap ≥ 20 MHz or Wgap ≥ 80MHz for Band 46. The CACLR requirement in subclause 6.6.2.6 applies in sub block gaps for the frequency ranges defined in Table 6.6.2-5/6.
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 subclause 6.6.2.6 applies in Inter RF Bandwidth gaps for the frequency ranges defined in Table 6.6.2-5/6.
The requirement applies during the transmitter ON period.
6.6.2.2 Minimum Requirement
The minimum requirement is in TS 36.104 [2] subclause 6.6.2.1.
6.6.2.3 Test purpose
To verify that the adjacent channel leakage power ratio requirement shall be met as specified by the minimum requirement.
6.6.2.4 Method of test
6.6.2.4.1 Initial conditions
Test environment: normal; see Annex D.2.
RF channels to be tested for single-carrier: B, M and T; see subclause 4.7.
Base Station RF Bandwidth positions to be tested for multi-carrier and/or CA: BRFBW, MRFBW and TRFBW in single-band operation, see subclause 4.7.1; BRFBW_T’RFBW and B’RFBW_TRFBW in multi-band operation, see subclause 4.7.1.
1) Connect measurement device to the base station antenna connector as shown in Annex I.1.1.
2) The measurement device characteristics shall be:
– measurement filter bandwidth: defined in subclause 6.6.2.5;
– 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.
3) For a E-UTRA BS declared to be capable of single carrier operation only,set the base station to transmit a signal according to E-TM1.1 at manufacturer’s declared rated output power.
For a E-UTRA BS declared to be capable of multi-carrier and/or CA operation, set the base station to transmit according to E-TM1.1 on all carriers configured using the applicable test configuration and corresponding power setting specified in clause 4.10 and 4.11.
For a E-UTRA BS declared to be capable of NB-IoT in-band operation, start transmission according to [E-TM1.1] with the NB-IoT PRB constructed according to N-TM at manufacturer’s declared rated output power.
For a E-UTRA BS declared to be capable of NB-IoT guard-band operation, start transmission according to E-TM1.1 with the NB-IoT PRB constructed according to N-TM at manufacturer’s declared rated output power.
For a NB-IoT BS declared to be capable of single carrier operation, start transmission according to N-TM at manufacturer’s declared rated output power.
For a NB-IoT BS declared to be capable of multi-carrier in contiguous spectrum operation in single band only, start transmission according to N-TM on all carriers configured using in the applicable test configuration and corresponding power setting specified in clause 4.10 and 4.11.
For a E-UTRA and NB-IoT standalone BS declared to be capable of multi-carrier in contiguous spectrum operation in single band only, start transmission according to E-TM1.1 on all E-UTRA carriers and N-TM on all NB-IoT carriers configured using in the applicable test configuration and corresponding power setting specified in clause 4.10 and 4.11.
4) Set carrier frequency within the frequency band supported by BS.
6.6.2.4.2 Procedure
1) Measure Adjacent channel leakage power ratio for the frequency offsets both side of channel frequency as specified in Table 6.6.2-1 (Paired spectrum case) or Table 6.6.2-2 (Unpaired spectrum case) respectively. In multiple carrier case only offset frequencies below the lowest and above the highest carrier frequency used shall be measured.
2) For the ACLR requirement applied inside sub-block gap for non-contiguous spectrum operation: or inside Inter RF Bandwidth gap for multi-band operation
a) Measure ACLR inside sub-block gap or Inter RF Bandwidth gap as specified in subclause 6.6.2.5, if applicable.
b) For E-UTRA, measure CACLR inside sub-block gap or Inter RF Bandwidth gap as specified in subclause 6.6.2.6, if applicable.
3) For E-UTRA, repeat the test with the channel set-up according to E-TM1.2.
In addition, for a multi-band capable BS, the following step shall apply:
4) 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 single-band or multi-band test shall be terminated.
6.6.2.5 Test Requirement
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 -13 dBm/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 Home BS, either the ACLR limits in the tables below or the absolute limit of -50dBm/MHz shall apply, whichever is less stringent.
The ACLR requirements in Tables 6.6.2-1 to 6.6.2-4 (except Table 6.6.2-2b) apply to BS that supports E-UTRA or E-UTRA with NB-IoT (in band and/or guard band), in any operating band, except for Band 46. The ACLR requirements for Band 46 are in Table 6.6.2-2a and 6.6.2-4a. The ACLR requirements in Table 6.6.2-2b apply to BS that supports standalone NB-IoT.
For operation in paired spectrum, the ACLR shall be higher than the value specified in Table 6.6.2‑1.
Table 6.6.2-1: 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 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, 3.0, 5, 10, 15, 20 |
BWChannel |
E-UTRA of same BW |
Square (BWConfig) |
44.2 dB |
|
2 x BWChannel |
E-UTRA of same BW |
Square (BWConfig) |
44.2 dB |
|
|
BWChannel /2 + 2.5 MHz |
3.84 Mcps UTRA |
RRC (3.84 Mcps) |
44.2 dB |
|
|
BWChannel /2 + 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 [15], with a chip rate as defined in this table. |
||||
For operation in unpaired spectrum, the ACLR shall be higher than the value specified in Table 6.6.2‑2.
Table 6.6.2-2: 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 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, 3.0 |
BWChannel |
E-UTRA of same BW |
Square (BWConfig) |
44.2 dB |
|
2 x BWChannel |
E-UTRA of same BW |
Square (BWConfig) |
44.2 dB |
|
|
BWChannel /2 + 0.8 MHz |
1.28 Mcps UTRA |
RRC (1.28 Mcps) |
44.2 dB |
|
|
BWChannel /2 + 2.4 MHz |
1.28 Mcps UTRA |
RRC (1.28 Mcps) |
44.2 dB |
|
|
5, 10, 15, 20 |
BWChannel |
E-UTRA of same BW |
Square (BWConfig) |
44.2 dB |
|
2 x BWChannel |
E-UTRA of same BW |
Square (BWConfig) |
44.2 dB |
|
|
BWChannel /2 + 0.8 MHz |
1.28 Mcps UTRA |
RRC (1.28 Mcps) |
44.2 dB |
|
|
BWChannel /2 + 2.4 MHz |
1.28 Mcps UTRA |
RRC (1.28 Mcps) |
44.2 dB |
|
|
BWChannel /2 + 2.5 MHz |
3.84 Mcps UTRA |
RRC (3.84 Mcps) |
44.2 dB |
|
|
BWChannel /2 + 7.5 MHz |
3.84 Mcps UTRA |
RRC (3.84 Mcps) |
44.2 dB |
|
|
BWChannel /2 + 5 MHz |
7.68 Mcps UTRA |
RRC (7.68 Mcps) |
44.2 dB |
|
|
BWChannel /2 + 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 [15], with a chip rate as defined in this table. |
||||
For operation in Band 46, the ACLR shall be higher than the value specified in Table 6.6.2‑2a.
Table 6.6.2-2a: Base Station ACLR in Band 46
|
Channel bandwidth of E-UTRA lowest/highest 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 |
|
10 |
BWChannel |
E-UTRA of same BW |
Square (BWConfig) |
34.2 dB |
|
2 x BWChannel |
E-UTRA of same BW |
Square (BWConfig) |
39.2 dB |
|
|
20 |
BWChannel |
E-UTRA of same BW |
Square (BWConfig) |
35 dB |
|
2 x BWChannel |
E-UTRA of same BW |
Square (BWConfig) |
40 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. |
||||
For stand-alone NB-IoT operation in paired spectrum, the ACLR shall be higher than the value specified in Table 6.6.2‑2b.
Table 6.6.2-2b: Base Station ACLR for stand-alone NB-IoT operation in paired spectrum
|
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 |
300 kHz |
Stand-alone NB-IoT |
Square (180 kHz) |
39.2 dB |
|
500 kHz |
Stand-alone NB-IoT |
Square (180 kHz) |
49.2 dB |
For operation in non-contiguous paired spectrum or multiple bands, the ACLR shall be higher than the value specified in Table 6.6.2‑3.
Table 6.6.2-3: Base Station ACLR in non-contiguous paired spectrum or multiple bands
|
Sub-block or Inter RF Bandwidth gap size (Wgap) where the limit applies |
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 |
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 [15], with a chip rate as defined in this table. |
||||
For operation in non-contiguous unpaired spectrum or multiple bands, the ACLR shall be higher than the value specified in Table 6.6.2‑4.
Table 6.6.2-4: Base Station ACLR in non-contiguous unpaired spectrum or multiple bands
|
Sub-block or Inter RF Bandwidth gap size (Wgap) where the limit applies |
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 |
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 |
For operation in non-contiguous spectrum in Band 46, the ACLR shall be higher than the value specified in Table 6.6.2‑4a.
Table 6.6.2-4a: Base Station ACLR in non-contiguous spectrum in Band 46
|
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 (informative) |
Filter on the adjacent channel frequency and corresponding filter bandwidth |
ACLR limit |
|
Wgap ≥ 60 MHz |
10 MHz |
20MHz E-UTRA carrier |
Square (BWConfig) |
35 dB |
|
Wgap ≥ 80 MHz |
30 MHz |
20MHz E-UTRA carrier |
Square (BWConfig) |
40 dB |
6.6.2.6 Cumulative ACLR test requirement in non-contiguous spectrum
The following test requirement applies for the sub-block or Inter RF Bandwidth gap sizes listed in Table 6.6.2-5/6/6a,
– 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 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 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 assumed filter for the adjacent channel frequency is defined in Table 6.6.2-5/6. Filters on the assigned channels are defined in Table 6.6.2-7.
For Wide Area Category A BS, either the CACLR limits in Table 6.6.2-5/6 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 6.6.2-5/6 or the absolute limit of -15dBm/MHz shall apply, whichever is less stringent.
For Medium Range BS, either the CACLR limits in Table 6.6.2-5/6 or the absolute limit of -25 dBm/MHz shall apply, whichever is less stringent.
For Local Area BS, either the CACLR limits in Table 6.6.2-5/6 or the absolute limit of -32 dBm/MHz shall apply, whichever is less stringent.
The ACLR requirements in Tables 6.6.2-5 and 6.6.2-6 apply to BS that supports E-UTRA, in any operating band, except for Band 46. The ACLR requirements for Band 46 are in Table 6.6.2-6a.
For operation in non-contiguous spectrum or multiple bands, the CACLR for E-UTRA carriers located on either side of the sub-block gap or Inter RF Bandwidth gap shall be higher than the value specified in Table 6.6.2-5/6.
Table 6.6.2-5: Base Station CACLR in non-contiguous paired spectrum or multiple bands
|
Sub-block or Inter RF Bandwidth gap size (Wgap) where the limit applies |
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 |
|
5 MHz ≤ Wgap < 15 MHz |
2.5 MHz |
3.84 Mcps UTRA |
RRC (3.84 Mcps) |
44.2 dB |
|
10 MHz < 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 [15], with a chip rate as defined in this table. |
||||
Table 6.6.2-6: Base Station CACLR in non-contiguous unpaired spectrum or multiple bands
|
Sub-block or Inter RF Bandwidth gap size (Wgap) where the limit applies |
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 |
|
5 MHz ≤ Wgap < 15 MHz |
2.5 MHz |
5MHz E-UTRA carrier |
Square (BWConfig) |
44.2 dB |
|
10 MHz < Wgap < 20 MHz |
7.5 MHz |
5MHz E-UTRA carrier |
Square (BWConfig) |
44.2 dB |
For operation in non-contiguous spectrum in Band 46, the CACLR for E-UTRA carriers located on either side of the sub-block gap shall be higher than the value specified in Table 6.6.2-6a.
Table 6.6.2-6a: Base Station CACLR in non-contiguous spectrum in Band 46
|
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 (informative) |
Filter on the adjacent channel frequency and corresponding filter bandwidth |
CACLR limit |
|
20 MHz ≤ Wgap < 60 MHz |
10 MHz |
20MHz E-UTRA carrier |
Square (BWConfig) |
34.2 dB |
|
40 MHz < Wgap < 80 MHz |
30 MHz |
20MHz E-UTRA carrier |
Square (BWConfig) |
34.2 dB |
Table 6.6.2-7: 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 |
NOTE: If the above Test Requirements differ from the Minimum Requirement then the Test Tolerance applied for this test is non-zero. The Test Tolerance for this test and the explanation of how the Minimum Requirement has been relaxed by the Test Tolerance are given in Annex G.