Real-valued FFT in MCM and its realization based on discrete Hartley transform
Zhu Ye-hua · Information technology newsletter · 2005
In multi-carrier modulation of OFDM/DMT,the Fourier transform is real-valued FFT,and the IFFT is the inverse transform of real-valued FFT.The realization of Real-valued FFT is much different from the Complex-valued FFT.In this paper,a discrete Hartley transform-based FFT/IFFT method is discussed.The arithmetic operations are all real-valued,and comparing with the complex-valued FFT,the requirements of RAM,multiplier and adder are highly reduced.