Power, speed and area comparison of several new DPT architectures

Two new pipelined and one constant-geometry DFT architectures are presented. The first pipelined DFT architecture is based on the conventional radix-2 pipelined FFT with modification to reduce by half the number of registers in the preprocessor. The second pipelined DFT is a modified version of the architecture proposed by Boriakoff in with the number of multipliers reduced by two-thirds. The constant-geometry DFT structure with hardware complexity independent of the transform length is derived from our new Boriakoff-like structure. Two different methods are used to estimate the speed, power and area performance of the above DFT architectures