Authors : G. Manikandan and M. Anand
Abstract: Fast Fourier Transform (FFT) is one of the major operations in any communication system. The efficiency of the communication system is depends on the internal process (FFT/IFFT) of the system. In this study, designed a VLSI based 128-point mixed radix with combined Single path Delay Feedback (SDF) Single path Delay Commutator (SDC) FFT structure. The mixed Radix-2 and Radix-4 FFT architecture provide fast computation during the process. Combined SDF-SDC dataflow structure has different advantages, SDF structure is used to improving the speed of the process and the SDC structure is used to reducing the area (LUTs and slices) utilization and also reducing the power consumed by the processor. Because of these advantages only combined the both structure and get the efficient performance of the FFT architecture. The proposed architecture is applied into the OFDM communication system for speed transmission. Simulation of the proposed architecture is done by using ModelSim simulation environment. The performance can be analyzed and validated by Xilinx plan-ahead 12.4 tool.
G. Manikandan and M. Anand, 2017. Design of 128-Point FFT using Mixed Radix with Combined SDF-SDC Structure for OFDM Application. Journal of Engineering and Applied Sciences, 12: 5423-5428.