Integer FFT with Optimized Coefficient Sets

  title={Integer FFT with Optimized Coefficient Sets},
  author={Wei-Hsin Chang and Truong Q. Nguyen},
  journal={2007 IEEE International Conference on Acoustics, Speech and Signal Processing - ICASSP '07},
In this paper, the principle of finding the optimized coefficient set of integer fast Fourier transform (IntFFT) is introduced. IntFFT has been regarded as an approximation of original FFT since it utilizes lifting scheme (LS) and decomposes the complex multiplication of twiddle factor into three lifting steps. Based on the observation of the quantization loss model of lifting operations, we can select an optimized coefficient set and achieve better signal-to-quantization-noise ratio (SQNR). A… CONTINUE READING

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