6.6.3 Adjacent Channel Leakage power Ratio

37.1053GPPActive Antenna System (AAS) Base Station (BS) transmission and receptionRelease 17TS

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.

NOTE: Conformance to the AAS BS ACLR requirement can be demonstrated by meeting at least one of the following criteria as determined by the manufacturer:

1) The ratio of the sum of the filtered mean power measured on each TAB connector in the TAB connector TX min cell group at the assigned channel frequency to the sum of the filtered mean power measured on each TAB connector in the TAB connector TX min cell group at the adjacent channel frequency shall be greater than or equal to the ACLR limit of AAS BS. This applies for each TAB connector TX min cell group.

Or

2) The ratio of the filtered mean power at the TAB connector centred on the assigned channel frequency to the filtered mean power at each TAB connector centred on the adjacent channel frequency shall be greater than or equal to the ACLR limit of AAS BS for every TAB connector in the TAB connector TX min cell group, for each TAB connector TX min cell group.

In case the ACLR absolute limit of AAS BS is applied, the conformance can be demonstrated by meeting at least one of the following criteria as determined by the manufacturer:

1) The sum of the filtered mean power measured on each TAB connector in the TAB connector TX min cell group at the adjacent channel frequency shall be less than or equal to the ACLR absolute limit AAS BS. This applies to each TAB connector TX min cell group.

Or

2) The filtered mean power at each TAB connector centred on the adjacent channel frequency shall be less than or equal to the ACLR absolute limit of AAS BS scaled by -10log10(n) for every TAB connector in the TAB connector TX min cell group, for each TAB connector TX min cell group, where n is the number of TAB connectors in the TAB connector TX min cell group.

6.6.3.2 Minimum requirement for MSR operation

For E-UTRA and/or NR MSR operation, the ACLR limits for AAS BS are the same as those specified in 3GPP TS 37.104 [9] subclauses 6.6.4.1. The basic limits are also the same as the absolute limits of MSR E-UTRA and/or NR operation specified in 3GPP TS 37.104 [9] subclauses 6.6.4.1. The ACLR absolute limit of AAS BS is specified as the basic limit + 10log10(NTXU,countedpercell). The ACLR limit or the ACLR absolute limit of AAS BS, whichever is less stringent, shall apply outside the Base Station RF Bandwidth or Radio Bandwidth.

For UTRA FDD operation, the minimum requirement for ACLR are the same as those specified in 3GPP TS 25.104 [6], subclause 6.6.2.2, and applies outside the Base Station RF Bandwidth or Radio Bandwidth.

For UTRA TDD 1,28 Mcps operation, the minimum requirement for ACLR are the same as those specified in 3GPP TS 25.105 [7], subclause 6.6.2.2.1.2, and applies outside the Base Station RF Bandwidth or Radio Bandwidth.

For a TAB connector or TAB connector cell group supporting operation in non-contiguous spectrum, the ACLR requirement also applies for the first adjacent channel inside any sub-block gap 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.

CACLR requirements apply in sub-block gaps as defined in 3GPP TS 37.104 [9], subclause 6.6.4.4. Either the CACLR limit or the ACLR absolute limit of AAS BS shall apply, whichever is less stringent.

For a multi-band TAB connector or TAB connector cell group supporting operation in multiple operating bands through multi-band TAB connectors, the ACLR requirement 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.

CACLR requirements apply in Inter RF Bandwidth gaps as defined in 3GPP TS 37.104 [9], subclause 6.6.4.4. Either the CACLR limit or the ACLR absolute limit of AAS BS shall apply, whichever is less stringent.

6.6.3.3 Minimum requirement for single RAT UTRA operation

For single RAT UTRA FDD operation, the AAS BS ACLR minimum requirements are the same as those specified in 3GPP TS 25.104 [6], subclauses 6.6.2.2.1.

For single RAT UTRA FDD operation, the AAS BS CACLR limits are the same as those specified in 3GPP TS 25.104 [6], subclauses 6.6.2.2.2. The basic limits are also the same as the absolute limits of UTRA specified in 3GPP TS 25.104 [6], subclauses 6.6.2.2.2. The ACLR (CACLR) absolute basic limits of AAS BS are specified as the basic limit + 10log10(NTXU,countedpercell). The ACLR (CACLR) limit or the ACLR (CACLR) absolute basic limit of AAS BS shall apply, whichever is less stringent.

For single RAT UTRA TDD 1,28 Mcps operation, the AAS BS minimum requirements are the same as those specified in 3GPP TS 25.105 [7], subclause 6.6.2.2.

6.6.3.4 Minimum requirement for single RAT E-UTRA operation

For single RAT E-UTRA operation, the AAS BS ACLR and CACLR limits are the same as those specified in 3GPP TS 36.104 [8], subclauses 6.6.2.1 and 6.6.2.2. The basic limits are also the same as the absolute limits of E-UTRA specified in 3GPP TS 36.104 [8], subclauses 6.6.2.1 and 6.6.2.2. The ACLR (CACLR) absolute basic limits of AAS BS are specified as the basic limit + 10log10(NTXU,countedpercell). The ACLR (CACLR) limit or the ACLR (CACLR) absolute basic limit of AAS BS shall apply, whichever is less stringent.