6.4 Transmit ON/OFF power
37.1053GPPActive Antenna System (AAS) Base Station (BS) transmission and receptionRelease 17TS
6.4.1 General
Transmitter ON/OFF power requirements apply only to TDD operation of UTRA and E-UTRA.
6.4.2 Transmitter OFF power
6.4.2.1 General
Transmitter OFF power is defined as the mean power measured over 70/N μs filtered with a square filter of bandwidth equal to the Base Station RF Bandwidth (s) centred on the central frequency of the Base Station RF Bandwidth (s) during the transmitter OFF period. N is equal to 1 for UTRA and E_UTRA SCS/15 for NR, where SCS is Sub Carrier Spacing in kHz.
The requirement applies at each TAB connector supporting transmission in the operating band.
For multi-band TAB connectors and for single band TAB connectors supporting transmission in multiple operating bands, the requirement is only applicable during the transmitter OFF period in all supported operating bands.
For AAS BS supporting intra-band contiguous CA, the transmitter OFF power is defined as the mean power measured over 70/N us filtered with a square filter of bandwidth equal to the Aggregated BS Channel Bandwidth BWChannel_CA centred on (Fedge,high+Fedge,low)/2 during the transmitter OFF period. N is equal to 1 if there are any UTRA or E-UTRA carriers, or for NR N = SCS/15, where SCS is the smallest supported Sub Carrier Spacing in kHz in the Aggregated BS Channel Bandwidth.
6.4.2.2 Minimum requirement for MSR operation
The transmitter OFF power spectral density shall be less than -85 dBm/MHz.
6.4.2.3 Minimum requirement for single RAT UTRA operation
The minimum requirement for UTRA operation is the same as that defined in subclause 6.4.2.2.
6.4.2.4 Minimum requirement for single RAT E-UTRA operation
The minimum requirement for UTRA operation is the same as that defined in subclause 6.4.2.2.
6.4.3 Transmitter transient period
6.4.3.1 General
The transmitter transient period is the time period during which the transmitter unit is changing from the OFF period to the ON period or vice versa. The transmitter transient period is illustrated in figure 6.4.3.1-1.
Figure 6.4.3.1-1: Illustration of the relations of transmitter ON period,
transmitter OFF period and transmitter transient period
This requirement applies at each TAB connector supporting transmission in the operating band.
6.4.3.2 Minimum requirement for MSR operation
The minimum requirements for MSR AAS BS transmitter transient period are the same as in 3GPP TS 37.104 [9], subclause 6.4.2.1.
6.4.3.3 Minimum requirement for single RAT UTRA operation
The minimum requirements for single RAT AAS BS transmitter transient period are the same as in 3GPP TS 25.105 [7], subclause 6.5.2.1.2.
6.4.3.4 Minimum requirement for single RAT E-UTRA operation
The minimum requirements for single RAT AAS BS transmitter transient period are the same as in 3GPP TS 36.104 [8], subclause 6.4.2.1.