Content for TR 37.941 Word version: 18.1.0

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1 Scope p. 18

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.

2 References p. 19

The following documents contain provisions which, through reference in this text, constitute provisions of the present document.

References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific.
For a specific reference, subsequent revisions do not apply.
For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.

[1]

TR 21.905: "Vocabulary for 3GPP Specifications".

[2]

TS 25.141: "Base Station (BS) conformance testing (FDD)".

[3]

TS 36.141: "Evolved Universal Terrestrial Radio Access (E-UTRA); Base Station (BS) conformance testing".

[4]

TS 37.145-2: "Active Antenna System (AAS) Base Station (BS) conformance testing; Part 2: Radiated conformance testing".

[5]

TS 38.141-1: "NR; Base Station (BS) conformance testing; Part 1: Conducted conformance testing".

[6]

TS 38.141-2: "NR; Base Station (BS) conformance testing; Part 2: Radiated conformance testing".

[7]

IEEE Std 149: "IEEE Standard Test Procedures for Antennas", IEEE.

[8]

JCGM 100:2008: "Evaluation of measurement data - Guide to the expression of uncertainty in measurement".

[9]

Hald, J.; Hansen, J. E.; Jensen, F. & Holm Larsen, F. Hansen, J. (Ed): "Spherical Near-Field Antenna Measurements", Peter Peregrinus Ltd., 1998, vol 26.

[10]

J. Fridén, A. Razavi, and A. Stjernman: "Angular sampling, Test Signal, and Near-Field Aspects for Over-the-Air Total Radiated Power Assessment in Anechoic Chambers", IEEE Access, 2018, https://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=8470084.

[11]

IEC 61000-4-21: "Electromagnetic compatibility (EMC) - Part 4-21: Testing and measurement techniques - Reverberation chamber test methods", Edition 2.0 2011-01, The International Electrotechnical Commision (IEC), 2011.

[12]

Hill, D.A. "Boundary fields in reverberation chambers"!, IEEE Transactions on Electromagnetic Compatibility, vol. 47, no. 2, pp. 281-290, May 2005.

[13]

Krauthäuser, H. G.; Winzerling, T.; J., N.; Eulig, N. & Enders, A "Statistical interpretation of autocorrelation coefficients for fields in mode-stirred chambers"!, 2005 International Symposium on Electromagnetic Compatibility, 2005. EMC 2005, 2005, 2, 550-555.

[14]

TS 37.105: "Active Antenna System (AAS) Base Station (BS) transmission and reception".

[15]

ITU-R Recommendation SM.329: "Unwanted emissions in the spurious domain".

[16]

TS 37.113: "E-UTRA, UTRA and GSM/EDGE; Multi-Standard Radio (MSR) Base Station (BS) Electromagnetic Compatibility (EMC)".

[17]

TS 37.114: "Active Antenna System (AAS) Base Station (BS) Electromagnetic Compatibility (EMC)".

[18]

TS 38.113: "Base Station (BS) Electromagnetic Compatibility (EMC)".

[19]

IEC 61000-4-3: "Electromagnetic compatibility (EMC) - Part 4-3: Testing and measurement techniques - Radiated, radio-frequency, electromagnetic field immunity test".

[20]

Victor Rabinovich, Nikolai Alexandrov, Basim Alkhateeb: "Automotive Antenna Design and Applications"; 2010.

[21]

TS 37.145-1: "Base Station (BS) conformance testing Part 1: Conducted conformance testing".

[22]

Jonas Fridén "Sparse sampling analysis"!, Matlab code, 2020, https://se.mathworks.com/matlabcentral/fileexchange/67143-sparse-sampling-analysis-tool?s_tid=srchtitle.

[23] Void.

[24]

TR 25.914: "Measurements of radio performances for UMTS terminals in speech mode".

[25]

ERC Recommendation 74-01: "Unwanted emissions in the spurious domain".

[26]

K. A. Remley, S. Catteau, A. Hussain, C. Nogueira, M. Kristoffersen, J. Kvarnstrand, B. Horrocks, J. Fridén, R. D. Horansky and D. F. Williams, "Practical Correlation-Matrix Approaches for Standardized Testing of Wireless Devices in Reverberation Chambers," IEEE Open Journal of Antennas and Propagation, 2023.