A Cost-Effective Memory-Based Real-Valued FFT and Hermitian Symmetric IFFT Processor for DMT-Based Wire-Line Transmission Systems
Hsiang-Feng Chi, Zhao-Hong Lai · 2005
This paper presents an efficient computation scheme for the memory-based FFT/IFFT processor used in DMT (discrete multi-tone) systems. Only half-size FFT/IFFT is required to transform real-valued data and Hermitian symmetric data. That is, the cost in processing elements and memory can be reduced by two. Finally, a variable-size radix-4 memory-based FFT/IFFT processor with block scaling scheme is designed for DMT systems.