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TECHNICAL REPORT
5G;
NR;
Derivation of test tolerances and measurement uncertainty for
User Equipment (UE) conformance test cases
(3GPP TR 38.903 version 16.9.0 Release 16)
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3GPP TR 38.903 version 16.9.0 Release 16 1 ETSI TR 138 903 V16.9.0 (2021-10)
Reference
RTR/TSGR-0538903vg90
Keywords
5G
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3GPP TR 38.903 version 16.9.0 Release 16 2 ETSI TR 138 903 V16.9.0 (2021-10)
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3GPP TR 38.903 version 16.9.0 Release 16 3 ETSI TR 138 903 V16.9.0 (2021-10)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 9
Introduction . 9
1 Scope . 10
2 References . 10
3 Definitions, symbols and abbreviations . 11
3.1 Definitions . 11
3.2 Symbols . 11
3.3 Abbreviations . 11
4 General Principles . 12
4.1 Principle of Superposition . 12
4.2 Sensitivity analysis . 12
4.3 Statistical combination of uncertainties . 12
4.4 Correlation between uncertainties . 13
4.4.1 Uncorrelated uncertainties . 13
4.4.2 Positively correlated uncertainties . 14
4.4.3 Negatively correlated uncertainties . 14
4.4.4 Treatment of uncorrelated uncertainties . 15
4.4.5 Treatment of positively correlated uncertainties with adverse effect . 15
4.4.6 Treatment of positively correlated uncertainties with beneficial effect . 15
4.4.7 Treatment of negatively correlated uncertainties . 15
5 Determination of Test System Uncertainties . 16
5.1 General . 16
5.2 Uncertainty figures . 16
6 Determination of Test Tolerances . 16
6.1 General . 16
7 Grouping of test cases defined in TS 38.521-4 . 16
8 Grouping of test cases defined in TS 38.533 . 17
Annex A: Derivation documents for test tolerance . 25
A.1 Void . 25
A.2 Handling of common Test Tolerance topics for radiated test cases defined in TS 38.533 . 25
A.2.1 Angles of Arrival . 25
A.2.1.1 Relevant core requirements. 25
A.2.1.2 Modelling of variation within spherical coverage directions . 26
A.2.1.3 Principles for Test Tolerance analysis . 26
A.2.2 UE Fine beams and Rough beams . 26
A.2.2.1 Relevant core requirements. 26
A.2.2.2 Modelling of Fine beams and Rough beams . 27
A.2.2.3 Principles for Test Tolerance analysis . 27
A.2.3 UE internal noise . 28
A.2.3.1 Relevant core requirements. 28
A.2.3.2 Calculation method . 28
A.2.3.3 Principles for Test Tolerance analysis . 29
A.2.4 Calculation of Es/Iot at UE baseband . 29
A.2.4.1 Relevant core requirements. 29
A.2.4.2 Calculation method . 29
ETSI
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3GPP TR 38.903 version 16.9.0 Release 16 4 ETSI TR 138 903 V16.9.0 (2021-10)
A.2.4.3 Principles for Test Tolerance analysis . 30
A.2.5 Calculation of Applied Io . 30
A.2.5.1 Relevant core requirements. 30
A.2.5.2 Calculation method . 30
A.2.5.3 Principles for Test Tolerance analysis . 31
A.2.6 UE Reported RSRP and UE gain . 31
A.2.6.1 Relevant core requirements. 31
A.2.6.2 Absolute RSRP . 32
A.2.6.3 Relative RSRP, 2 levels on same cell, same Angle of Arrival . 33
A.2.6.4 Relative RSRP, 2 intra-frequency cells, same Angle of Arrival . 34
A.2.6.5 Relative RSRP, 2 inter-frequency cells, same Angle of Arrival . 34
A.2.6.6 Relative RSRP, 2 cells, different Angles of Arrival . 34
A.2.6.7 Principles for Test Tolerance analysis . 35
A.2.7 Intra-frequency cells without AWGN, same Angle of Arrival . 35
A.2.7.1 Test system . 35
A.2.7.2 Calculation method for Es/Iot at UE baseband . 35
A.2.7.3 Calculation method for Applied Io . 36
A.2.7.4 Principles for Test Tolerance analysis . 37
A.3 Test Tolerance analysis templates for radiated test cases awaiting completion . 37
A.4 Design of radiated test cases defined in TS 38.533 . 37
A.4.1 Downlink considerations . 38
A.4.1.1 Side conditions for Rx Beam Peak angle of arrival . 38
A.4.1.2 Side conditions for Spherical Coverage angle of arrival. 38
A.4.1.3 Test case design options to increase downlink dB range . 39
Annex B: Acceptable uncertainty of test system for test cases defined in TS
38.521-2 for radiative testing . 41
B.1 Uncertainty budget calculation principle. 41
B.1.1 Uncertainty budget calculation principle for DFF . 41
B.1.2 Uncertainty budget calculation principle for IFF . 42
B.1.3 Uncertainty budget calculation principle for NFTF . 42
B.2 Measurement error contribution descriptions . 42
B.2.1 Measurement error contribution descriptions for DFF . 42
B.2.1.1 Positioning misalignment . 42
B.2.1.2 Measure distance uncertainty . 42
B.2.1.3 Quality of quiet zone. 42
B.2.1.4 Mismatch . 42
B.2.1.5 Standing Wave Between the DUT and measurement antenna . 44
B.2.1.6 Uncertainty of the RF power measurement equipment . 44
B.2.1.7 Phase curvature . 45
B.2.1.8 Amplifier uncertainties . 45
B.2.1.9 Random uncertainty . 45
B.2.1.10 Influence of the XPD . 46
B.2.1.11 Insertion loss Variation . 50
B.2.1.12 RF leakage (from measurement antenna to receiver/transmitter) . 50
B.2.1.13 Misalignment of positioning System . 50
B.2.1.14 Uncertainty of the Network Analyzer . 50
B.2.1.15 Uncertainty of the absolute gain of the calibration antenna . 50
B.2.1.16 Positioning and pointing misalignment between the reference antenna and the measurement antenna . 50
B.2.1.17 gNB emulator uncertainty . 50
B.2.1.18 Phase centre offset of calibration . 51
B.2.1.19 Quality of quiet zone for calibration process . 51
B.2.1.20 Standing wave between reference calibration antenna and measurement antenna . 51
B.2.1.21 Influence of the calibration antenna feed cable (Flexing cables, adapters, attenuators, connector
repeatability) . 52
B.2.1.22 Influence of TRP measurement grid . 52
B.2.1.23 Influence of beam peak search grid . 52
B.2.1.24 Systematic error due to TRP calculation/quadrature . 52
B.2.1.25 Multiple measurement antenna uncertainty . 52
ETSI
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3GPP TR 38.903 version 16.9.0 Release 16 5 ETSI TR 138 903 V16.9.0 (2021-10)
B.2.1.26 DUT repositioning . 52
B.2.1.27 Influence of noise . 52
B.2.1.28 Systematic error related to beam peak search . 53
B.2.1.29 Influence of spherical coverage grid . 53
B.2.1.30 Systematic error related to EIS spherical coverage . 53
B.2.1.31 Misalignment of DUT due to change of DUT orientation . 53
B.2.1.32 Additional Impact of Interferer ACLR . 53
B.2.1.33 Modulated Interferer uncertainty . 53
B.2.1.34 Void . 53
B.2.1.35 Influence of offset antenna for blocker signal. 53
B.2.1.36 Uncertainty of the RF relative power measurement equipment . 54
B.2.2 Measurement error contribution descriptions for IFF . 54
B.2.2.1 Positioning misalignment . 54
B.2.2.2 Measure distance uncertainty . 54
B.2.2.3 Quality of Quiet Zone . 54
B.2.2.4 Mismatch . 54
B.2.2.5 Standing wave between DUT and measurement antenna . 55
B.2.2.6 Uncertainty of the RF power measurement equipment . 55
B.2.2.7 Phase Curvature . 55
B.2.2.8 Amplifier Uncertainties . 55
B.2.2.9 Random uncertainty . 55
B.2.2.10 Influence of XPD . 55
B.2.2.11 Insertion Loss Variation . 55
B.2.2.12 RF leakage (from measurement antenna to receiver/transmitter) . 55
B.2.2.13 Misalignment of positioning system . 55
B.2.2.14 Uncertainty of the Network Analyzer . 55
B.2.2.15 Uncertainty of the absolute gain of the calibration antenna . 55
B.2.2.16 Positioning and pointing misalignment between the reference antenna and the measurement antenna . 55
B.2.2.17 gNB emulator uncertainty . 55
B.2.2.18 Phase centre offset of calibration . 56
B.2.2.19 Quality of the Quiet Zone for Calibration Process . 56
B.2.2.20 Standing wave between reference calibration antenna and measurement antenna . 56
B.2.2.21 Influence of the calibration antenna feed cable (Flexing cables, adapters, attenuators, connector
repeatability) . 56
B.2.2.22 Influence of TRP measurement grid . 56
B.2.2.23 Influence of beam peak search grid . 56
B.2.2.24 Systematic error due to TRP calculation/quadrature . 56
B.2.2.25 Multiple measurement antenna uncertainty . 56
B.2.2.26 DUT repositioning . 56
B.2.2.27 Influence of noise . 56
B.2.2.28 Systematic error related to beam peak search . 56
B.2.2.29 Influence of spherical coverage grid . 56
B.2.2.30 Systematic error related to EIS spherical coverage . 56
B.2.2.31 Misalignment of DUT due to change of DUT orientation . 57
B.2.2.32 Additional Impact of Interferer ACLR . 57
B.2.2.33 Modulated Interferer uncertainty . 57
B.2.2.34 Influence of ETC on EIRP/EIS . 57
B.2.2.35 Influence of offset antenna for blocker signal. 57
B.2.2.6 Uncertainty of the RF relative power measurement equipment . 57
B.2.3 Measurement error contribution descriptions for NFTF. 57
B.2.3.1 Axes Alignment . 57
B.2.3.2 Measurement Distance uncertainty . 57
B.2.3.3 Quality of the Quiet Zone . 57
B.2.3.4 Mismatch . 57
B.2.3.5 Multiple Reflections: Coupling Measurement Antenna and DUT . 57
B.2.3.6 Uncertainty of the RF power measurement equipment . 58
B.2.3.7 Phase curvatur
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