9.7.3 OTA Adjacent Channel Leakage power Ratio

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

9.7.3.1 General

OTA 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 measured power is TRP.

9.7.3.2 Minimum requirement for MSR operation

For AAS BS in MSR operation using E-UTRA, the OTA ACLR limits for AAS BS are the same as those specified in 3GPP TS 37.104 [9] subclauses 6.6.4.1. The ACLR absolute limits in 3GPP TS 37.104 [9] subclauses 6.6.4.1 are replaced with the following:

– For E-UTRA or NR Category A AAS BS of Wide Area BS class the OTA ACLR absolute limit of -4dBm/MHz shall apply,

– For E-UTRA or NR Category B AAS BS Wide Area BS class the OTA ACLR absolute limit of -6dBm/MHz shall apply.

– For E-UTRAor NR AAS BS of Medium Range BS class the OTA ACLR absolute limit of -16 dBm/MHz shall apply.

– For E-UTRA or NR AAS BS of Local Area BS class the OTA ACLR absolute limit of -23dBm/MHz shall apply.

The OTA 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 AAS BS in MSR operation using UTRA FDD, the minimum requirement for OTA ACLR are the same as those specified in 3GPP TS 25.104 [6], subclause 6.6.2.2, where the ACLR absolute limit is replaced with the following:

– For UTRA FDD Category A AAS BS of Wide Area BS class the OTA ACLR absolute limit of -7dBm/MHz shall apply.

– For UTRA FDD Category B AAS BS Wide Area BS class the OTA ACLR absolute limit of -9dBm/MHz shall apply.

– For E-UTRA FDD AAS BS of Medium Range BS class the OTA ACLR absolute limit of -19 dBm/MHz shall apply.

– For E-UTRA FDD AAS BS of Local Area BS class the OTA ACLR absolute limit of -26dBm/MHz shall apply.

The OTA 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 a RIB supporting operation in non-contiguous spectrum, the OTA ACLR requirement also applies for the first adjacent channel inside any sub-block gap with a gap size Wgap ≥ 15MHz. The OTA ACLR requirement for the second adjacent channel applies inside any sub-block gap with a gap size Wgap ≥ 20 MHz.

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

For a multi-band RIB, the OTA ACLR requirement also applies for the first adjacent channel inside any Inter RF Bandwidth gap with a gap size Wgap ≥ 15MHz. The OTA ACLR requirement for the second adjacent channel applies inside any Inter RF Bandwidth gap with a gap size Wgap ≥ 20 MHz.

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

9.7.3.3 Minimum requirement for single RAT UTRA operation

For AAS BS in single RAT UTRA operation FDD, the OTA ACLR minimum requirements are the same as those specified in 3GPP TS 25.104 [6], subclauses 6.6.2.2.1, where the ACLR absolute limit is replaced with the following:

– For UTRA FDD Category A AAS BS of Wide Area BS class the OTA ACLR absolute limit of -7dBm/MHz shall apply.

– For UTRA FDD Category B AAS BS Wide Area BS class the OTA ACLR absolute limit of -9dBm/MHz shall apply.

– For UTRA FDD AAS BS of Medium Range BS class the OTA ACLR absolute limit of -19 dBm/MHz shall apply.

– For UTRA FDD AAS BS of Local Area BS class the OTA ACLR absolute limit of -26dBm/MHz shall apply.

The OTA ACLR limits or the absolute ACLR limits apply whichever is less stringent.

For AAS BS in single RAT UTRA operation FDD, the OTA CACLR limits are the same as those specified in 3GPP TS 25.104 [6], subclauses 6.6.2.2.2. The ACLR absolute limit of AAS BS is replaced with the following:

– For UTRA FDD Category A AAS BS of Wide Area BS class the OTA ACLR absolute limit of -7dBm/MHz shall apply.

– For UTRA FDD Category B AAS BS Wide Area BS class the OTA ACLR absolute limit of -9dBm/MHz shall apply.

– For UTRA FDD AAS BS of Medium Range BS class the OTA ACLR absolute limit of -19 dBm/MHz shall apply.

– For UTRA FDD AAS BS of Local Area BS class the OTA ACLR absolute limit of -26dBm/MHz shall apply.

The OTA CACLR limit or the OTA ACLR absolute limit of AAS BS shall apply, whichever is less stringent.

9.7.3.4 Minimum requirement for single RAT E-UTRA operation

For AAS BS in single RAT E-UTRA operation, the OTA ACLR and OTA 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 ACLR absolute limits in 3GPP TS 36.104 [8] subclauses 6.6.2.1 and 6.6.2.2 are replaced with the following:

– For E-UTRA Category A AAS BS of Wide Area BS class the ACLR absolute limit of -4dBm/MHz shall apply.

– For E-UTRA Category B AAS BS Wide Area BS class the ACLR absolute limit of -6dBm/MHz shall apply.

– For E-UTRA AAS BS of Medium Range BS class the ACLR absolute limit of -16 dBm/MHz shall apply.

– For E-UTRA AAS BS of Local Area BS class the ACLR absolute limit of -23dBm/MHz shall apply.

The OTA ACLR (CACLR) limit or the ACLR absolute limit of AAS BS shall apply, whichever is less stringent.