Content for TR 38.761 Word version: 18.2.1

3.1 Terms 3.2 Symbols 3.3 Abbreviations 4.1 Device types 4.2 Testing configuration 4.3 Testing Bands 5.1 General 5.2 Measurement setup for FR1 MIMO OTA 5.3 Measurement setup for FR2 MIMO OTA
...

1 Scope p. 7

The present document is a Technique Report for Measurements of Multiple Input Multiple Output (MIMO) Over-the-Air (OTA) performance of User Equipment (UE). It includes analysis and measurement results of MIMO OTA in Frequency Range 1 and Frequency Range 2, such as verification of channel models, lab alignment activities, etc.

2 References p. 7

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]

TR 38.151: "NR; Multiple Input Multiple Output (MIMO) Over-the-Air (OTA) performance requirements for NR UEs".

[3]

TR 38.827: "Study on radiated metrics and test methodology for the verification of multi-antenna reception performance of NR User Equipment (UE)".

[4]

TS 38.101-1: "NR; User Equipment (UE) radio transmission and reception; Part 1: Range 1 Standalone"

[5]

TS 38.101-2: "NR; User Equipment (UE) radio transmission and reception; Part 2: Range 2 Standalone"

[6]

TS 38.101-3: "NR; User Equipment (UE) radio transmission and reception; Part 3: Range 1 and Range 2 Interworking operation with other radios"

[7]

TS 38.101-4: "NR; User Equipment (UE) radio transmission and reception; Part 4: Performance requirements"

[8]

TS 36.101: "Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE) radio transmission and reception"

[9]

TS 38.508-1: "5GS; User Equipment (UE) conformance specification; Part 1: Common test environment"

[10]

TR 38.901: "Study on channel model for frequencies from 0.5 to 100 GHz"

[11]

F. Zhang, L. Hentilä, P. Kyösti and W. Fan, "Millimeter-wave New Radio Test Zone Validation for MIMO Over-the-air Testing," in IEEE Transactions on Antennas and Propagation, doi: 10.1109/TAP.2021.3111326.

3 Definitions of terms, symbols and abbreviations p. 7

3.1 Terms p. 7

For the purposes of the present document, the terms given in TR 21.905 and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905.

FS:

UE used in a free space configuration.

Handheld UE:

A UE intended to be used in hand held scenario.

MIMO Average Spherical Coverage:

An averaged sensitivity of best 18 FR2 MIMO OTA sensitivity values within the 3D sphere with constant-density points for PC3 device.

Primary mechanical mode:

The mode that is most often used for a specific user scenario. Every terminal has at least one primary mechanical mode, if multiple modes are supported, different primary mechanical modes may be applicable for different user scenarios, e.g., different primary mechanical modes for Free Space and Hand phantom usage for the same UE.

PSP (PAS Similarity Percentage):

The similarity of the PAS produced by the OTA system and the reference PAS, which is presented by the Total Variation Distance (TVD) of power angular spectrum (PAS). PSP is defined as (1-TVD)*100%. PSP=100% denotes full similarity and PSP=0% denotes full dissimilarity..

3.2 Symbols p. 8

For the purposes of the present document, the following symbols apply:

3.3 Abbreviations p. 8

For the purposes of the present document, the abbreviations given in TR 21.905 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905.

AOA

Azimuth angle Of Arrival

AOD

Azimuth angle Of Departure

Base Station

CDL

Clustered Delay Line

Continuous Wave

DML

Data Mode Landscape

DMP

Data Mode Portrait

DMSU

Data Mode Screen Up

DUT

Device Under Test

EUT

Equipment Under Test

FR1

Frequency Range 1

FR2

Frequency Range 2

Free Space

MASC

MIMO Average Spherical Coverage

MIMO

Multiple Input Multiple Output

MPAC

Multi-Probe Anechoic Chamber

New Radio

NSA

Non-Standalone, a mode of operation where operation of an other radio is assisted with an other radio

OTA

Over The Air

PAS

Power Angular Spectrum

PDP

Power Delay Profile

PSP

PAS Similarity Percentage

RS-EPRE

Reference Signal-Energy Per Resource Element

System Simulator

SSS

Secondary Synchronization Signal

TRMS

Total Radiated Multi-antenna Sensitivity

User Equipment

UMa

Urban Macro

UMi

Urban Micro

XPR

Cross-Polarization Ratio

ZOA

Zenith angle Of Arrival

ZOD

Zenith angle Of Departure

ZSA

Zenith angle Spread of Arrival

ZSD

Zenith angle Spread of Departure

4 General p. 9

4.1 Device types p. 9

The present technical report covers the smartphone device type.

4.2 Testing configuration p. 9

The present technical report covers the free space (FS) testing configuration.

4.3 Testing Bands p. 9

The present technical report covers both FR1 and FR2 operating bands. FR1 operating bands are defined in TS 38.101-1 and FR2 operating bands are defined in TS 38.101-2. NSA band combinations are defined in TS 38.101-3. E-UTRA is designed to operate in operating bands defined in TS 36.101.

5 Measurement setup p. 9

5.1 General p. 9

The measurements in the present technical report are based on the test methodology defined in TS 38.151 and TR 38.827.

5.2 Measurement setup for FR1 MIMO OTA p. 9

The multi-probe anechoic chamber (MPAC) test method is the reference methodology for FR NR MIMO OTA testing, the measurement setup and test procedure are defined in TS 38.151.

5.3 Measurement setup for FR2 MIMO OTA p. 9

The 3D MPAC test method is the reference methodology for FR2 NR MIMO OTA testing, the measurement setup and test procedure are defined in TS 38.151.