name: RXU
full_form: Receiver Unit
context: or pre-set manner for the measured OSDD declaration, i.e. there is only one interface to digital/baseband processing. The near field test method is not suitable if for the measured OSDD declaration any combining is not fixed or preset. Some examples of architectures for which near field test method is possible and for which it is not possible are depicted on figure 10.3.2.1.4.2-2. The AAS BS under test should not have any other non-linear behaviour that would cause the near field to far field transformation to fail or cause increased OTA sensitivity measurement uncertainty (for example, Automatic Gain Control if applicable must be disabled and the receiver dynamic range must be sufficient to prevent any increased measurement uncertainty due to the range of the near field values.. Figure 10.3.2.1.4.2-1: Examples of limit of OSDD functionality testable with near field test method for a single OSDD Figure 10.3.2.1.4.2-2: Examples of limit of OSDD functionality not testable with near
description: The Receiver Unit (RXU) is a component within the Active Antenna System (AAS) Base Station (BS) architecture. It receives signals from the antenna paths and elements via the Radio Distribution Network (RDN) and processes them accordingly. The RXU can be separated from the TXU and have different mapping through the RDN towards the Active Antenna (AA).
explanation: The description details the RXU's role in signal reception, processing, and interaction with other network components like the TXU, RDN, and AA. This functionality aligns with the definition of a Network Function, which performs specific tasks within a telecommunications system.
section_title: 4.3	General AAS BS RF architecture
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