name: FFT
full_form: Fast Fourier Transform
context: 1. SCCP (ITU-T Rec. Q.711 [7] or ANSI T1.112-2001 [32]) provides connectionless service, class 0, connection oriented service, class 2, separation of the connections mobile by mobile basis on the connection oriented link and establishment of a connection oriented link mobile by mobile basis. SCCP shall be used as specified in TS 25.410 [18]. 2. MTP3-B (ITU-T Rec. Q.2210 [4] or ANSI T1.111-2001 [31]) provides message routing, discrimination and distribution (for point-to-point link only), signalling link management load sharing and changeover/back between link within one link-set. The need for multiple link-sets is precluded. MTB3-B shall comply with ITU-T Rec. Q.2210 [4] or ANSI T1.111-2001 [31]. 3. SAAL-NNI (ITU-T Rec. Q.2100 [1]) consists of the following sub-layers: - SSCF (ITU-T Rec. Q.2140 [3] or ANSI T1.645-1995 (R2003) [33]), - SSCOP (ITU-T Rec. Q.2110 [2]) and â AAL5 (ITU-T Rec. I.363.5 [6]). The SSCF maps the requirements of the layer above to the requirements of SSCOP. Also
description: The Fast Fourier Transform (FFT) is a mathematical algorithm used to efficiently calculate the discrete Fourier transform of a sequence. In telecommunications, FFT is used for time-domain-to-frequency-domain translation, particularly in Orthogonal Frequency Division Multiplexing (OFDM) symbol generation. It involves mixed-radix FFT with radix-2 and radix-4 butterflies, requiring complex multiplies, real additions, and table look-ups.
explanation: FFT is classified as a Technology because it is a mathematical algorithm that enables efficient signal processing within telecommunications systems. Its application in OFDM symbol generation highlights its role in enabling modern communication technologies.
section_title: 6.7.5.1	Time-Domain-to-Frequency-Domain Translation (i.e. FFT) Complexity
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