name: FFT
full_form: Fast Fourier Transformation
context: The resource element TX power is measured after the FFT box as described in figure M.2.4-1 for FR1 and in figure M.2.4.2. The EVM shall be measured at the point after the FFT and a zero-forcing (ZF) equalizer in the receiver, as depicted in for FR1 in figure M.2.4-1 and for FR2-1 in figure M.2.4-2. The FFT window of FFT size samples out of (FFT size + cyclic prefix length) samples in the time domain is selected in the "Remove CP" box. For FR1, The FFT size and the cyclic prefix length are obtained from TS 38.176-1 [3] table 6.5.3.5-2 for 15 kHz SCS, table 6.5.3.5-3 for 30 kHz SCS and table 6.5.3.5-4 for 60 kHz SCS. For FR2-1, FFT size and the cyclic prefix length is determined from table 6.6.3.5.2-2 for 60 kHz SCS, and table 6.6.3.5.2-3 for 120 kHz SCS. In one subframe, there are two symbols with the length of the cyclic prefix larger than the values listed in TS 38.176-1 [3] tables 6.5.3.5-2, 6.5.3.5-3 and 6.5.3.5-4 for FR1 and table 6.6.3.5.2-2 and table 6.6.3.5.2-3 for FR2-1. Table
description: Fast Fourier Transformation (FFT) is a mathematical algorithm used in telecommunications to efficiently calculate the discrete Fourier transform of a sequence. In the context of 3GPP TS 38.176, FFT is utilized for measurement purposes, specifically for measuring resource element TX power and EVM after the FFT box.
explanation: FFT is classified as Technology because it is a mathematical algorithm used for signal processing and analysis in telecommunications. Its application in 3GPP TS 38.176 for measuring key parameters like TX power and EVM further reinforces its categorization under Technology.
section_title: M.2.4Measurement points
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