Institute of Research in Engineering and Technology (IRET)
The FFT processor is a critical block in all multi-carrier systems used primarily in the mobile environment. The portability requirement of these systems is mainly responsible for the need of low power FFT architectures. In this paper, an efficient addressing scheme for radix-4 64 point FFT processor is presented. It avoids the modulo-r addition in the address generation; hence, the critical path is significantly shorter than the conventional radix-4 pipelined FFT processor by modifying its operation sequence. The complex multiplier is one of the most power consuming blocks in the FFT processor.