Abstract
In this paper, simplified IFFT method is proposed for SFN relay station coupling canceller system. For digital broadcasting system such as ISDB-T system, pilot carriers are transmitted together with data carriers, so that the channel transfer function is estimated both in frequency and in time. Then the channel estimation over all carriers is performed by interpolation of the channnel transfer function of pilot carriers. In a SFN relay station, the estimated channel information of all carriers is transformed into time domain using IFFT in order to cancel the coupling in real time. proposed simple IFFT reduces the hardware complexity and processing time, while guaranteeing the system performance.
