[资料分享] DFT/IDFT Reference Design

Introduction
The DFT reference design performs a discrete Fourier transform (DFT) or an inverse DFT (IDFT) of a complex input sequence and produces a complex output sequence.
The reference design performs the functions for either a DFT in the uplink or an IDFT in the downlink of a typical 3G long-term evolution (LTE)
physical interface (PHY) implementation The design inputs the transform length coincident with the first validated data sample. The design can configure the transform length at runtime (on a block-by-block basis) to any one of the 34 sizes specified by the proposal in 3GPP Technical Document R1-062852, submitted to TSG-RAN WG1 #46bis, Seoul Korea.