Title :
Finite word length analysis of the radix-22 FFT
Author :
Rey, Hernan G. ; Galarza, Cecilia
Author_Institution :
Fac. de Ing., Univ. de Buenos Aires, Buenos Aires, Argentina
Abstract :
In this paper, we analyze the quantization error effects of the radix-22 FFT algorithm. We propose per tone models for the error power. This is a different approach from the common choice of a maximum or mean value over the spectrum. In particular, we treat three different errors: due to input quantization, due to coefficient quantization and due to quantization after a multiplication. This analysis is applied to a DMT scheme. Simulation results agree with the theoretical predictions.
Keywords :
fast Fourier transforms; quantisation (signal); signal processing; DMT scheme; discrete multitone model; finite word length analysis; per tone model; quantization error effect; radix-22 FFT algorithm; signal processing; Abstracts; Transforms;
Conference_Titel :
Signal Processing Conference, 2004 12th European
Conference_Location :
Vienna
Print_ISBN :
978-320-0001-65-7
