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Includes SISO measurements without changes to test setup

SISO OTA measurements for 2G and 3G legacy technolo-gies are a mandatory part of device characterization. Thanks to the unique two-channel method devised by Rohde&Schwarz, the anechoic chamber can be used for both SISO and MIMO tests without hardware modifica-tion; one of the cross-polarized test antennas is simply driven into a non-interfering parking position.

Measurements in free space as well as with phantom head and/or hand are possible in SISO and MIMO modę.

Verification of smart UE receive antennas

The two-channel method can also verify the performance of smart UE antennas with adaptive receiving character-istics. This is assured sińce the two-channel method does not require any auxiliary RF cabling connected to the an-tenna ports of the UE during the test. Therefore the inter-face between antenna and RF frontend is untouched - the actual UE antennas are connected to their real-world load impedance during the test.

Extension of SISO chamber for MIMO testing

Most existing manufacturer's SISO setups can be up-graded to cover MIMO testing. Chambers used for today’s SISO OTA work are typically large enough to accommo-date the R&S®AMS32 MIMO-OTA upgrade. A second dual-polarized test antenna with dedicated elevation positioner is added.

Main components of the R&S^STS8991 OTA performance test system for MIMO

Rohde&Schwarz OTA performance measurements

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