4.2 Radiated requirement reference points

38.176-23GPPIntegrated Access and Backhaul (IAB) conformance testingNRPart 2: radiated conformance testingRelease 17TS

Radiated characteristics for IAB type 1-H, IAB type 1-O and IAB type 2-O are defined over the air (OTA) where the operating band specific radiated interface is referred to as the Radiated Interface Boundary (RIB). Radiated requirements are also referred to as OTA requirements. The (spatial) characteristics in which the OTA requirements apply are detailed for each requirement. For IAB type 1-H the requirements are defined for two points of reference, signified by radiated requirements at the RIB and the conducted requirements at transceiver array boundary (TAB). The OTA requirements of IAB type 1-H are tested in the far field (Fraunhofer) region.

General architecture and reference points of IAB type 1-H, IAB type 1-O and IAB type 2-O are presented on the following figures 4.2-1 and 4.2-2.

Figure 4.2-1: General architecture of IAB type 1-H

The present document details only radiated test requirements and hence only requires the radiated reference points.

Figure 4.2-2: General architecture of IAB type 1-O and IAB type 2-O

The transceiver unit array is part of the composite transceiver functionality generating modulated transmit signal structures and performing receiver combining and demodulation.

The transceiver unit array contains an implementation specific number of transmitter units and an implementation specific number of receiver units. Transmitter units and receiver units may be combined into transceiver units. The transmitter/receiver units have the ability to receive/send parallel independent modulated symbol streams.

The composite antenna contains a radio distribution network (RDN) and an antenna array. The RDN is a linear passive network that distributes the RF power between the transceiver array boundary and the antenna array, in an implementation specific way.