name: PDF
full_form: Probability Distribution Function
context: User Plane protocol stack for HSPA traffic is Iu-PS (GTP-U/UDP/IP). In case of one tunnel approach the User plane is directly between evolved HSPA NodeB and GGSN. In carrier sharing case, non-HSPA traffic goes to RNC on Iur. Uplink Macro Diversity Stand-alone deployment scenario Flat architecture is optimized for intra Node B uplink MDC for user plane. In case of inter-NodeB MDC, it is possible to apply a 'Serving Node B' â 'Drift Node B' scenario. In the flat architecture, the operator needs investigate, whether to use MDC or not. For example, NodeB with good sensitivity can lead to situation where link budget is downlink limited and MDC is not needed at all. Carrier sharing deployment scenario MDC can be used for non HSPA traffic served by the RNC. Header Compression Stand-alone deployment scenario Header compression for Evolved HSPA is located in the evolved HSPA Node B. It is possible to implement header compression for GTP-U and have separate header compression for radio interface
description: Probability Distribution Function (PDF) is a statistical tool used to describe the probability distribution of a random variable. In this context, it represents the graphical depiction of the probability distribution of Peak-to-Average Power Ratio (PAPR) and Cubic Metric (CM) values. PDF curves help visualize and analyze the distribution patterns of these metrics across various scenarios.
explanation: PDF is classified as a Statistical Concept because its primary function is to quantify and represent the probability distribution of random variables, which is a fundamental concept in statistics.  The text explicitly states that it's used to describe the probability distribution of PAPR and CM values.
section_title: 5.1.3 	PAPR impacts
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