The present document is the Technical Report for the Work Item on Over The Air (OTA) Base Station (BS) testing. This Technical Report covers background information of OTA testing methods, measurement uncertainty and test tolerance values derivation for the radiated conformance testing requirements. This Technical Report covers radiated conformance testing requirements for the following BS types:

• Hybrid AAS BS as specified in AAS BS radiated testing specification TS 37.145-2 for the following radio technologies:
  • Hybrid AAS BS in single RAT UTRA operation, TDD
  • Hybrid AAS BS in single RAT UTRA operation, FDD
  • Hybrid AAS BS in single RAT E-UTRA operation
  • Hybrid AAS BS in MSR operation implementing any of the above RATs, including NR operation.
• OTA AAS BS as specified in AAS BS radiated testing specification TS 37.145-2 for the following radio technologies:
  • OTA AAS BS in single RAT UTRA operation, FDD
  • OTA AAS BS in single RAT E-UTRA operation
  • OTA AAS BS in MSR operation implementing any of the above RATs, and/or NR.
• BS type 1-H in single RAT NR operation in FR1, as specified in NR BS radiated testing specification TS 38.141-2,
• BS type 1-O in single RAT NR operation in FR1, as specified in NR BS radiated testing specification TS 38.141-2,
• BS type 2-O in single RAT NR operation in FR2, as specified in NR BS radiated testing specification TS 38.141-2.

Generic term "BS" is used to refer to any of these BS types, unless otherwise stated. This 3GPP external Technical Report consolidates the OTA measurement related information originating from multiple AAS BS and NR BS internal technical reports. This information is needed to supplement the BS radiated testing specifications as a single, 3GPP external technical report, such that the information can be referred to from external specifications and bodies. The NR BS specification refers to two frequency ranges, FR1 and FR2. The AAS BS specification is only applicable for operating bands within FR1. Thus, sections in this report referring to FR2 should be considered as applicable to NR only.