The MIMO Antenna: Unseen, Unloved, Untested!

摘要

The big issue facing MIMO OTA test development is the laudable but hugely challenging goal of measuring realistic end-user performance. Considerable work lies ahead to determine what level of sophistication is required in the test system to differentiate between a good MIMO DUT and one that is undesirable. SISO OTA standardization had the advantage that every DUT on the planet was a potential measurement candidate, but the lack of wide availability of a rich diversity of MIMO devices will limit the rate at which progress can be made towards a final MIMO OTA standard. Everyone agrees that testing needs to be no more complex, time consuming, or expensive than necessary, but it is clear from current proposals that the industry is still some way from agreeing on reference performance in specific conditions and the associated accuracy and method of test.