ctia_mimo_ota_tp_v1_2.pdf

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Test Plan for 2x2 Downlink MIMO and Transmit

Diversity Over-the-Air Performance

Version 1.2

April 2018

CTIA hereby grants to CTIA Authorized Testing Laboratories (CATLs), and only to CATLs, a limited, non-

transferable license to use this Test Plan for the sole purpose of testing wireless devices for the CTIA Certification

Program, and to reproduce this Test Plan for internal use only. Any other use of this Test Plan must be authorized

in writing by CTIA.

Any reproduction or transmission of all or part of this Test Plan, in any form or by any means, electronic or

mechanical, including photocopying, recording, or via any information storage and retrieval system, without

the prior written permission of CTIA, is unauthorized and strictly prohibited.

Certification Program Test Plan

April 2018 4 Version 1.2

Table of Contents

Section 1 Introduction ......................................................................................................................... 7

1.1 Purpose ............................................................................................................................ 7

1.2 Scope ................................................................................................................................ 7

1.3 Applicable Documents .................................................................................................... 7

1.4 Acronyms and Definitions .............................................................................................. 8

1.5 MIMO OTA Test Overview ............................................................................................... 8

1.6 MIMO Equipment under Test and Accessories-The Wireless Device........................ 9

1.7 Wireless Device Documentation .................................................................................... 9

1.8 Over-the-Air Test System ............................................................................................... 9

1.8.1 Multi-Probe Anechoic Chamber (MPAC) ......................................................... 9

Section 2 MIMO Receiver Performance Assessment (Open-Loop Spatial Multiplexing) ........... 12

2.1 MPAC General Description .......................................................................................... 12

2.2 MPAC System Setup ..................................................................................................... 12

2.2.1 MPAC Ripple Test ......................................................................................... 12

2.2.2 MPAC Calibration .......................................................................................... 12

2.3 EUT Positioning within the MPAC Test Volume ......................................................... 23

2.3.1 EUT Free-Space Orientation within the MPAC Test Zone ............................ 23

2.3.2 MPAC EUT Orientation within the Test Zone using Phantoms ..................... 23

2.3.3 Maximum EUT Antenna Spacing and Placement of EUT within the Test Zone

2.4 MIMO Average Radiated SIR Sensitivity (MARSS)..................................................... 28

2.4.1 Introduction .................................................................................................... 28

2.4.2 eNodeB Emulator Configuration .................................................................... 28

2.4.3 Channel Model Definition .............................................................................. 33

2.4.4 Channel Model Emulation of the Base Station Antenna Pattern .................. 35

2.4.5 Signal to Interference Ratio (SIR) Control for MARSS Measurement .......... 35

2.5 MPAC MIMO OTA Test Requirements ......................................................................... 44

2.5.1 Introduction .................................................................................................... 44

2.5.2 Throughput Calculation ................................................................................. 44

2.5.3 MIMO OTA Test Frequencies ....................................................................... 45

2.6 MPAC MIMO OTA Test Methodology .......................................................................... 45

2.6.1 Introduction .................................................................................................... 45

2.6.2 SIR-Controlled Test Procedure Using the MPAC ......................................... 45

2.6.3 MARSS Figure of Merit.................................................................................. 46

Section 3 Transmit Diversity Receiver Performance Evaluation .................................................. 48

Section 4 Implementation Conformance Statements Applicable to MIMO and Transmit

Diversity OTA Performance Measurement ............................................................................................. 49

Section 5 Measurement Uncertainty ................................................................................................ 50

5.1 Introduction .................................................................................................................... 50

5.2 Common Uncertainty Contributions due to Mismatch .............................................. 51

5.3 Common Uncertainty Contributions for a Receiving Device .................................... 52

Certification Program Test Plan

April 2018 5 Version 1.2

5.4 Common Uncertainty Contributions for a Signal Source ......................................... 53

5.5 Common Uncertainty Contributions for Measurement/Probe Antennas ................ 53

5.5.1 Substitution Components .............................................................................. 53

5.6 Common Uncertainty Contributions for Measurement Setup .................................. 54

5.6.1 Offset of the Phase Center of the Calibrated Reference Antenna from

Axis(es) of Rotation ....................................................................................................... 54

5.6.2 Influence of the Ambient Temperature on the Test Equipment .................... 54

5.6.3 Miscellaneous Uncertainty ............................................................................ 54

5.6.4 Minimum Downlink/Interference Power Step Size: ....................................... 54

5.7 Typical Uncertainty Contributions for External Amplifier ......................................... 55

5.7.1 Gain ............................................................................................................... 55

5.7.2 Mismatch ....................................................................................................... 55

5.7.3 Stability .......................................................................................................... 55

5.7.4 Linearity ......................................................................................................... 56

5.7.5 Amplifier Noise Figure/Noise Floor ................................................................ 56

5.8 Common Uncertainty Contributions for EUT ............................................................. 56

5.8.1 Measurement Setup Repeatability ................................................................ 56

5.8.2 Effect of Ripple on EUT Measurement .......................................................... 57

5.9 Typical Uncertainty Contributions for Reference Measurement .............................. 57

5.9.1 Effect of Ripple on Range Reference Measurements ................................... 57

5.10 Path Loss Measurement Uncertainty .......................................................................... 58

5.10.1 Substitution Components: ............................................................................. 59

5.11 Summary of Common Uncertainty Contributions for MIMO Receiver Performance

5.12 Combined and Expanded Uncertainties for Overall MIMO Receiver Performance 60

5.12.1 Compliance Criteria for the Overall MIMO Receiver Performance Uncertainty

5.13 Combined and Expanded Uncertainties and Compliance Criteria for the Transmit

Diversity Receiver Performance .................................................................................................. 61

Appendix A—Validation and Verification of Test Environments and Test Conditions (Normative) 62

A.1 Measurement Instrument Overview ................................................................................ 62

A.1.1 Measurement instruments and Setup ........................................................... 62

A.1.2 Network Analyzer (VNA) Setup ..................................................................... 62

A.1.3 Spectrum Analyzer (SA) Setup ..................................................................... 63

A.2 Validation of the MPAC MIMO OTA Test Environment and Test Conditions ............. 64

A.2.1 Validation of SIR-Controlled MPAC Test Environment ................................. 64

A.2.2 Validation of Doppler/Temporal Correlation for MPAC ................................. 66

A.2.3 Validation of MPAC Spatial Correlation......................................................... 70

A.2.4 Validation of Cross-Polarization for MPAC.................................................... 74

A.2.5 Input Phase Calibration Validation (Normative) ............................................ 76

Appendix B — Validation of Transmit Diversity Receiver Performance Test Environments and Test

Conditions 77

Appendix C — Reporting Test Results (Normative) .............................................................................. 78

C.1 MARSS Radiated Measurement Data Format ................................................................ 78

C.2 Transmit Diversity Radiated Measurement Data Format.............................................. 78

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