9.8 OTA Transmitter intermodulation

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

9.8.1 General

The OTA transmitter intermodulation requirement is a measure of the capability of the transmitter unit to inhibit the generation of signals in its non-linear elements caused by presence of the wanted signal and an interfering signal reaching the transmitter unit via the RDN and antenna array from a co-located base station. The requirement applies during the transmitter ON period and the transmitter transient period.

The requirement applies at each RIB supporting transmission in the operating band.

The transmitter intermodulation level is the total radiated power of the intermodulation products when an interfering signal is injected into the co-location reference antenna.

9.8.2 Minimum requirement for MSR operation

9.8.2.1 General minimum requirement

The transmitter intermodulation level shall not exceed the unwanted emission limits specified for OTA transmitter spurious emission in subclause 9.7.6.1, 9.7.6.2.1 and 9.7.6.2.3, OTA operating band unwanted emission in subclause 9.7.5 and OTA ACLR in subclause 9.7.3 in the presence of a wanted signal and an interfering signal according to table 9.8.2.1‑1 for OTA AAS BS operation in BC1, BC2 and BC3.

The requirement is applicable outside the Base Station RF Bandwidth edges. The interfering signal offset is defined relative to the Base Station RF Bandwidth edges or Radio Bandwidth edges.

For RIBs supporting operation in non-contiguous spectrum, the requirement is also applicable inside a sub-block gap for interfering signal offsets where the interfering signal falls completely within the sub-block gap. The interfering signal offset is defined relative to the sub-block edges.

For multi-band RIBs, the requirement applies relative to the Base Station RF Bandwidth edges of each operating band. In case the inter Base Station RF Bandwidth gap is less than 15 MHz, the requirement in the gap applies only for interfering signal offsets where the interfering signal falls completely within the inter Base Station RF Bandwidth gap.

Table 9.8.2.1-1: Interfering signal for the OTA transmitter intermodulation requirement

Parameter

Value

Wanted signal type

E-UTRA or NR signal

Interfering signal type

E-UTRA signal of channel bandwidth 5 MHz

Interfering signal power level applied to the co-location reference antenna

min(46 dBm, Prated,t,TRP)

Interfering signal centre frequency offset from Base Station RF Bandwidth edge or edge of sub-block inside a gap

±2.5 MHz

±7.5 MHz

±12.5 MHz

NOTE 1: Interfering signal positions that are partially or completely outside of any downlink operating band of the RIB is excluded from the requirement, unless the interfering signal positions fall within the frequency range of adjacent downlink operating bands in the same geographical area. In case that none of the interfering signal positions fall completely within the frequency range of the downlink operating band, 3GPP TS 37.141 [19] provides further guidance regarding appropriate test requirements.

NOTE 2: In certain regions, NOTE 1 is not applied in Band 1, 3, 8, 9, 11, 18, 19, 21, 28, 32 operating within 1 475.9 MHz to 1 495.9 MHz, 34.

NOTE 3: For OTA AAS BS with dual polarization, the interfering signal power shall be equally divided between the supported polarizations at the co-location reference antenna.

9.8.2.2 Additional minimum requirement (BC1 and BC2)

The transmitter intermodulation level shall not exceed the unwanted emission limits specified for transmitter spurious emission in subclause 9.7.6.1, 9.7.6.2.1 and 9.7.6.2.3 operating band unwanted emission in subclause 9.7.5 and ACLR in subclause 9.7.3 in the presence of a wanted signal and an interfering signal according to table 9.8.2.2-1 for BS operation in BC2.

The requirement is applicable outside the Base Station RF Bandwidth edges for BC2. The interfering signal offset is defined relative to the Base Station RF Bandwidth edges.

For RIBs supporting operation in non-contiguous spectrum in BC1 or BC2, the requirement is also applicable inside a sub-block gap with a gap size larger than or equal to two times the interfering signal centre frequency offset. For RIBs supporting operation in non-contiguous spectrum in BC1, the requirement is not applicable inside a sub-block gap with a gap size equal to or larger than 5 MHz. The interfering signal offset is defined relative to the sub-block edges.

For multi-band RIBs, the requirement applies relative to the Base Station RF Bandwidth edges of a BC2 operating band. The requirement is also applicable for BC1 and BC2 inside an inter Base Station RF Bandwidth gap equal to or larger than two times the interfering signal centre frequency offset. For RIBs supporting operation in multiple operating bands, the requirement is not applicable for BC1 band inside an inter Base Station RF Bandwidth gap with a gap size equal to or larger than 5 MHz.

Table 9.8.2.2-1: Interfering and wanted signals for the OTA transmitter intermodulation requirement

Parameter

Value

Wanted signal type

E-UTRA or NR or UTRA signal

Interfering signal type

CW

Interfering signal power level applied to the co-location reference antenna

min(46 dBm, Prated,t,TRP)

Interfering signal centre frequency offset from Base Station RF Bandwidth edge or edge of sub-block inside a gap

> abs(800) kHz for CW interfering signal

NOTE 1: Interfering signal positions that are partially or completely outside of any downlink operating band of the RIB are excluded from the requirement.

NOTE 2: For OTA AAS BS with dual polarization, the interfering signal power shall be equally divided between the supported polarizations at the co-location reference antenna.

9.8.2.3 Additional minimum requirement (BC3)

The transmitter intermodulation level shall not exceed the unwanted emission limits specified for OTA transmitter spurious emission in subclause 9.7.6.1, 9.7.6.2.1 and 9.7.6.2.3 OTA operating band unwanted emission in subclause 9.7.5 and OTA ACLR in subclause 9.7.3 in the presence of a wanted signal and an interfering signal according to table 9.8.2.3-1 for AAS BS operation in BC3.

For multi-band RIBs, the requirement applies relative to the Base Station RF Bandwidth edges of each operating band. In case the Inter RF Bandwidth gap is less than 3.2 MHz, the requirement in the gap applies only for interfering signal offsets where the interfering signal falls completely within the inter Base Station RF Bandwidth gap.

Table 9.8.2.3-1: Interfering and wanted signals for the OTA transmitter intermodulation requirement (BC3)

Parameter

Value

Wanted signal type

E-UTRA or NR or UTRA signal

Interfering signal type

1,28 Mcps UTRA TDD signal of channel bandwidth 1,6 MHz

Interfering signal power level applied to the co-location reference antenna

min(46 dBm, Prated,t,TRP)

Interfering signal centre frequency offset from Base Station RF Bandwidth edge or edge of sub-block inside a gap

±0,8 MHz

±1,6 MHz

±2,4 MHz

NOTE 1: Interfering signal positions that are partially or completely outside of any downlink operating band of the base station are excluded from the requirement.

NOTE 2: For OTA AAS BS with dual polarization, the interfering signal power shall be equally divided between the supported polarizations at the co-location reference antenna.

9.8.2.4 Additional minimum requirements

9.8.3 Minimum requirement for single RAT UTRA operation

9.8.3.1 General minimum requirement for FDD UTRA

The transmitter intermodulation level shall not exceed the OTA out of band emission or the OTA spurious emission requirements of subclause 9.7.5 and subclause 9.7.6.1, 9.7.6.3.1 and 9.7.6.3.3, in the presence of interfering signal according to table 9.8.3.1-1.

Table 9.8.3.1-1: Interfering and wanted signal frequency offset for OTA transmitter intermodulation requirement

Parameter

Value

Wanted signal type

UTRA

Interfering signal type

UTRA

Interfering signal power level applied to the co-location reference antenna

min(46 dBm, Prated,t,TRP)

Interfering signal centre frequency offset from the lower (upper) edge of the wanted signal or edge of sub-block inside a gap

-2,5 MHz

-7,5 MHz

-12,5 MHz

+2,5 MHz

+7,5 MHz

+12,5 MHz

NOTE 1: Interference frequencies that are outside of any allocated frequency band for UTRA-FDD downlink specified in subclause 4.6 are excluded from the requirement, unless the interfering signal positions fall within the frequency range of adjacent downlink operating bands in the same geographical area.

NOTE 2: NOTE 1 is not applied in Band I, III, VI, VIII, IX, XI, XIX, XXI, and XXXII operating within 1 475.9 MHz to 1 495.9MHz, in certain regions.

NOTE 3: For OTA AAS BS with dual polarization, the interfering signal power shall be equally divided between the supported polarizations at the co-location reference antenna.

For RIBs supporting operation in non-contiguous spectrum, the requirement is also applicable inside a sub-block gap for interfering signal offsets where the interfering signal falls completely within the sub-block gap. The interfering signal offset is defined relative to the sub-block edges.

For multi-band RIBs, the requirement is also applicable inside an inter Base Station RF Bandwidth gap for interfering signal offsets where the interfering signal falls completely within the inter Base Station RF Bandwidth gap.

9.8.4 Minimum requirement for single RAT E-UTRA operation

9.8.4.1 General minimum requirement

The transmitter intermodulation level shall not exceed the unwanted emission limits in subclauses 9.7.6.1, 9.7.6.4.1, 9.7.6.4.3, 9.7.5 and 9.7.3 in the presence of an E-UTRA interfering signal according to table 9.8.4.1‑1.

The requirement is applicable outside the Base Station RF Bandwidth or Radio Bandwidth. The interfering signal offset is defined relative to the Base Station RF Bandwidth edges or Radio Bandwidth edges.

For RIBs supporting operation in non-contiguous spectrum, the requirement is also applicable inside a sub-block gap for interfering signal offsets where the interfering signal falls completely within the sub-block gap. The interfering signal offset is defined relative to the sub-block edges.

For multi-band RIBs , the requirement applies relative to the Base Station RF Bandwidth edges of each supported operating band. In case the inter Base Station RF Bandwidth gap is less than 15 MHz, the requirement in the gap applies only for interfering signal offsets where the interfering signal falls completely within the inter Base Station RF Bandwidth gap.

The wanted signal and interfering signal centre frequency is specified in table 9.8.4.1‑1.

Table 9.8.4.1-1: Interfering and wanted signals for the OTA transmitter intermodulation requirement

Parameter

Value

Wanted signal

E-UTRA single carrier, or multi-carrier, or multiple intra-band contiguously or non-contiguously aggregated carriers

Interfering signal type

E-UTRA signal of channel bandwidth 5 MHz

Interfering signal power level applied to the co-location reference antenna

min(46 dBm, Prated,t,TRP)

Interfering signal centre frequency offset from the lower (upper) edge of the wanted signal or edge of sub-block inside a sub-block gap

±2,5 MHz

±7,5 MHz

±12,5 MHz

NOTE 1: Interfering signal positions that are partially or completely outside of any downlink operating band of the base station are excluded from the requirement, unless the interfering signal positions fall within the frequency range of adjacent downlink operating bands in the same geographical area. In case that none of the interfering signal positions fall completely within the frequency range of the downlink operating band, 3GPP TS 36.141 [20] provides further guidance regarding appropriate test requirements.

NOTE 2: In certain regions, NOTE 1 is not applied in Band 1, 3, 8, 9, 11, 18, 19, 21, 28, 32 operating within 1 475.9 MHz to 1 495.9 MHz, 34, 74.

NOTE 3: For OTA AAS BS with dual polarization, the interfering signal power shall be equally divided between the supported polarizations at the co-location reference antenna.

9.8.4.2 Void

Table 9.8.4.2-1: Void