name: CATR
full_form: Compact Antenna Test Range
context: 22.185 [6] can be summarized as follows, although they do not limit the usage of LTE-V2X. Other requirements relating to general system function are also included in TS 22.185 [6]. - Support for periodic broadcast messages with payloads of 50-300 bytes. - Support for event-triggered messages with payloads of up to 1200 bytes. - Up to 10 messages per second transmitted by a UE. - V2V and V2P latency of maximum 100 ms, or for V2V pre-crash sensing, maximum 20 ms. - V2I latency, i.e. between a UE and RSU, of maximum 100 ms. - V2N latency, i.e. when transferring messages via the cellular network, of maximum 1000 ms. - Maximum relative velocity between two vehicles of 500 km/h, and maximum absolute velocity of 250 km/h for V2V and V2P UEs, and of a UE communicating with an RSU. - Requirements relating to security, integrity, authorization, and privacy. NR V2X is designed with a broader set of more advanced V2X use cases in mind. These were specified in TS 22.18 [7], and are broadly
description: The Compact Antenna Test Range (CATR) is a specialized test chamber used to evaluate the accuracy of electromagnetic compatibility (EMC) and antenna measurements. It plays a crucial role in determining the measurement uncertainty (MU) associated with these tests, particularly for evaluating the EIRP accuracy in Frequency Range 2 (FR2).
explanation: CATR is classified as Testing Equipment because its primary function is to provide a controlled environment for conducting precise measurements and assessments related to electromagnetic compatibility and antenna performance.
section_title: 9.2.3.4	MU value derivation, FR2
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