name: EIS
full_form: Early IMS Security
context: will be based on the maximum antenna gain and hence will represent the best case EIS, this value is defined as OTA minimum sensitivity. 2. OTA reference sensitivity - lowest gain assumed hence highest interferer levels. The OTA reference sensitivity is the minimum level of sensitivity to be achieved over the OTA REFSEN RoAoA which is defined as the RoAoA determined by the contour defined by the points at which the achieved EIS is 3dB higher than the achieved EIS in the reference direction. It is equivalent to the sensitivity a passive system would achieve over the same RoAoA. The level is also used to specify the maximum interferers to be seen by each receiver unit input. Each of the interference requirements are specified with respect to: - the OTA sensitivity, or - the OTA reference sensitivity, or - Both, depending on the nature of the requirement. For in-band interference requirements (i.e. dynamic range, ACS ICS, in-band blocking, RX IMD) wanted and interferer signal are
description: Early IMS Security (EIS) is the minimum level of sensitivity required by a receiver during Over-The-Air (OTA) testing. It's measured relative to a Reference Sensitivity (REFSEN) area, which is 3dB higher than the achieved EIS in the reference direction.
explanation: EIS is classified as Miscellaneous because it doesn't fall under specific categories like network functions, protocols, or technologies. Its focus on receiver sensitivity during OTA testing places it within a broader context of testing and performance evaluation.
section_title: 12.6.2	OTA requirements
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