FFT which inputs the FFT operation device and

摘要

Suppresses FFT calculation device to an increase in delay time and overhead of the circuit area for the calculation processing of the received power, provide a method. By using the multipliers in the butterfly operation unit used in the FFT calculation process, in the final stage of the FFT calculation process, by the time the multiplication of the butterfly computation is not performed, to calculate the received signal power, at the same time as the FFT operation I do the calculation of the received power. (Figure 3)