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TR 38.870
Enhanced Over-the-Air (OTA) test methods for
NR FR1 Total Radiated Power (TRP) and Total Radiated Sensitivity (TRS)

V18.2.0 (Wzip)2024/06  … p.
Dr. Wang, Ruixin
vivo Communication Technology

full Table of Contents for  TR 38.870  Word version:  18.0.0

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1  Scopep. 9

The present document is a technical report for enhanced Over-the-Air (OTA) test methods for NR FR1 Total Radiated Power (TRP) and Total Radiated Sensitivity (TRS), for NR standalone (SA) and NR non-standalone (NSA) operation mode.
In Rel-17, the TRP TRS OTA test method was just developed for a limited scope. This TR targets to define a full set of OTA test methods to cover different UE features for TRP and TRS measurement.

2  Referencesp. 9

3  Definitions of terms, symbols and abbreviationsp. 10

3.1  Termsp. 10

3.2  Symbolsp. 11

3.3  Abbreviationsp. 11

4  Generalp. 11

5  Performance metricsp. 22

6  UE positioning guidelinesp. 24

7  Anechoic Chamber method (Reference method)p. 30

8  Reverberation Chamber test methodologyp. 42

9  Testing time reduction methodologiesp. 50

A  UE coordinate systemp. 62

B  Estimation of Measurement uncertaintyp. 64

B.1  Generalp. 64

B.2  MU contribution descriptions for Anechoic Chamber methodp. 65

B.2.1  Mismatch uncertaintyp. 65

B.2.2  Insertion lossp. 70

B.2.3  Influence of the antenna cablep. 71

B.2.4  Measurement receiver: uncertainty of the absolute levelp. 71

B.2.5  Communication tester: uncertainty of the absolute levelp. 71

B.2.6  Sensitivity measurement: output level step resolutionp. 71

B.2.7  Measurement distancep. 71

B.2.8  Quality of quiet zonep. 73

B.2.9  DUT Tx-power driftp. 73

B.2.10  DUT sensitivity driftp. 74

B.2.11  Uncertainty related to the use of phantomsp. 74

B.2.12  Coarse sampling gridp. 77

B.2.13  Random uncertaintyp. 77

B.2.14  Frequency responsep. 78

B.2.15  Uncertainty of network analyserp. 78

B.2.16  Uncertainty of the gain/efficiency of the calibration antennap. 78

B.3  MU contribution descriptions for Alternative methodp. 78

B.4  MU Assessment for TRPp. 79

B.5  MU Assessment for TRSp. 85

C  Environmental requirementsp. 94

D  Phantom Definitionp. 95

E  Harmonization outcome of Alternative method and Reference methodp. 97

F  Lab alignment outcome of Reference methodp. 98

$  Change historyp. 102

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