Quantization Error According to Bit Truncation Method in 4k-FFT Algorithm

  • Sangjung Ra
  • Dongjoon Choi
  • Namho Hur
  • Sangjin Ryoo
  • Cheolsung Kim
Chapter
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 235)

Abstract

In this paper, we compare a quantization error performance of FFT algorithm according to bit truncation method. 4k-FFT algorithm of OFDM is proposed and implemented in field programmable gate arrays (FPGAs). We analyze the quantization error performance according to bit truncation method. Measured results show the maximum quantization error of 6.042152/6.067595 (real/imaginary value in 12 stage MSB truncation), 3.112953/2.627594 (real/imaginary value in 12 stage LSB truncation), 0.006065/0.005448 (real/imaginary value in 6 stage LSB/6 stage MSB truncation) in 1st method. And measured results show the maximum quantization error of 0.001464/0.00129 (real/imaginary value in truncation after FFT) in 2nd method.

Keywords

Quantization error Bit truncation Hardware implementation FFT OFDM 

Notes

Acknowledgments

This work was supported by the IT R&D program of KCA. [10035709, Development of Next Generation Digital Cable Transmission Technology].

References

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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • Sangjung Ra
    • 1
  • Dongjoon Choi
    • 1
  • Namho Hur
    • 1
  • Sangjin Ryoo
    • 2
  • Cheolsung Kim
    • 3
  1. 1.Broadcasting System Research DepartmentElectronics and Telecommunications Research InstituteDaejeonKorea
  2. 2.Department of Computer MediaHanyeong CollegeYeosuKorea
  3. 3.Chonnam National UniversityGwangjuKorea

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