Area and Delay Minimization of Radix-2k Feedforward FFT Architecture

The radix-2? was a milestone in the design of pipelined FFT hardware architectures. Later,radix-2 extended to radix-216.However,radix-216 was only proposed for single path delay feedback (SFD) architectures, but not for feedforward, also it called multi path delay commutator (MDC).The radix-216 feedforward Fast Fourier Transform architecture(FFT).In feedforward architectures radix-216 can be used for any number of parallel samples which is a power of two. Furthermore, both decimation in frequency (DIF) and decimation in time (DIT) decompositions can be used. In addition to this, the designs can achieve very high throughputs and reduce the spare complexity, which make them suitable for the most demanding applications. Indeed, the proposed radix-2k feedforward architectures require fewer hardware resources than parallel feedback ones, also called multi path delay feedback (MDF), when several samples in parallel must be processed. As result, the proposed radix-216 feedforward architectures not only offer an attractive solution for current applications, but also open up a new research line on feedforward structures.