저전력 125MS/s 256-point radix-2² SDF FFT 프로세서의 설계 및 구현

FFT(Fast Fourier transform) algorithm is one of the most widely used DSP(Digital Signal Processing) algorithm, reducing the operations of DFT effectively by decomposing the sequence of length N to the smaller sequence. Often, a high performance FFT processor is the key component in the embedded applications like wireless sensor networks or wide band OFDM systems. In this paper, a low power 125M/s 256-point R2²S-DF FFT processor is proposed. The processor is synthesized using Samsung 65nm low power CMOS process with a core size of 0.194㎟ and 11.4mW power consumption.