MIMO Channel Modeling and Emulation Test Challenges

[ahmedtaha]

hi all

Table of Contents

Introduction .............................................................................................................. 3
Reviewing MIMO Technologies ........................................................................... 4
Multiple antenna techniques .............................................................................. 5
MIMO in wireless standards.............................................................................12
Channel correlation effects on MIMO performance ....................................13
Challenges in emulating MIMO channels ......................................................14
MIMO Channel Overview ....................................................................................16
Wireless propagation characteristics ..............................................................17
Macroscopic (slow) fading ................................................................................18
MIMO Channel Correlation ................................................................................35
Spatial correlation ...............................................................................................35
Antenna polarization correlation ......................................................................37
Combined spatial and antenna polarization correlation ..............................40
Per-path correlation versus per-channel correlation ....................................44
Theoretical MIMO channel capacity ...............................................................45
Configuring the channel emulator to achieve the desired correlation .....46
Applying SNR to MIMO channels ....................................................................48
Configuring Standard-Compliant MIMO Channels using the PXB ...........52
Related Literature .................................................................................................54
Appendix A: Theoretical Model for MIMO Channel Capacity ....................55
Appendix B: SNR for Uncorrelated and Correlated MIMO Channels .........58

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