Low power FFT design for wireless communication systems

This paper presents a new study over logics circuit operation in subthreshold and threshold region. CMOS circuit model operation logic will make deep primary reference for this study. This new research presses low voltage features to circuit stated. By using profoundest results of the study, we will develop FFT processor designs as an example of digital wireless circuits. The FFT processor can operate for high frequency and with low voltage source. A FFT processor is the most critical part on speed in multi-carrier orthogonal frequency division multiplexing (OFDM) communication systems. In these systems, power dissipation is usually one of the major concerns. In this report, we evaluate the low-power consumption of a radix-2 pipeline FFT and concurrent FFT with low voltage power supply. FFT simulation results clearly show that low voltage is not a barrier for logic design to operate at high frequency.