A.5.2.2 RTS Positioning Guidelines and test zone dimensions

37.5443GPPConformance testingRelease 16TSUniversal Terrestrial Radio Access (UTRA) and Evolved UTRA (E-UTRA)User Equipment (UE) Over The Air (OTA) performance

For the RTS system, it can be seen from earlier analysis in the MU budget in TR 37.977 Annex B.2 [29] that the MU elements related to device size are linked to uncertainties in the field uniformity of the anechoic chamber used for the first stage antenna pattern measurement. The RTS MU budget was calculated with the assumption that the device size was within the limits defined by the chamber quiet zone defined in TS 34.114 Annex A2.3 [6], TS 34.114 E.10 [6] and as measured in TS 34.114 Annex G.2 [6]. The applicable device size for RTS is therefore the same as used for SISO TRS in the same chamber.

The second stage of the RTS method which involves a cable replacement radiated connection, is assumed in the MU budget to take place in the same anechoic chamber as was used for the first stage antenna pattern measurement, and there are no additional test zone considerations required. The use of a different chamber for the second stage is not precluded, but would require a recalculation of the impact of any difference between the anechoic chambers.

For device positioning within the test zone for the first stage the normal positioning accuracy assumed in TR 37.977 Table B.2-1 [29] of 1 degree is considered insignificant compared to the raster used for the antenna measurement.

For the second stage positioning impact, and with the assumption the chamber is the same as used in the first stage, the issue is the repeatability of the position used from the first stage. This is likely to be less than the 1 degree absolute positioning error so is again assumed to be negligible.

Annex B (normative): Calibration