Editorial
MIMO Over-The-Air Research, Development, and Testing
Table 1
Comparison of candidate methodologies.
| Method | Pros | Cons | Future work |
| A1 Multiprobe | Conceptually simple | Limited flexibility Cost per probe | Calibration and validation | A2 Ring of probes | Arbitrarily flexible | Cost 3D very costly | Calibration and validation | A3 Two-stage | Low cost including 3D | Requires DUT test mode | Self-interference solution | A4 Two-channel | Very low cost | No temporal and limited spatial control | Correlation with other methods | A5 Spatial emulator | Low cost | Limitations in channel models | Calibration and correlation with other methods | R1 Reverb | Very low cost | Limited temporal and no spatial control | Calibration and evaluation of spatial aspects | R2 Reverb plus fader | Low cost | No spatial control | Calibration and evaluation of spatial aspects |
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