Efficient CORDIC designs for multi-mode OFDM FFT

Cheng Ying Yu*, Sau-Gee Chen, Jen Chuan Chih

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

16 Scopus citations

Abstract

In this paper, we propose a new CORDIC algorithm and architectures which can generate close-to-optimum rotation sequences easily with small lookup table sizes. This new design is particularly suitable for the applications of adjustable-length FFT. In all, the required number of shift-and-add operations for micro-rotations and scale-factor compensations is only n/2, where n is the output precision. For design verification, we synthesized both serial and pipelined architectures, by using Synopsys Design Complier based on UMC 0.18 μm, lP6M CMOS technology. The synthesized 16-bit pipelined FFT PE runs at 222MHz, with a total gate count of 89263 and a low-power consumption of 26.75 mW. It meets the FFT speed requirements of most OFDM-based communication systems, including DAB, DVB, 802.16 and VDSL. Compared with a conventional multiplier-based FFT PE and the existing CORDIC-based FFT PE's, the proposed designs has better performances in terms of area, speed and power consumption.

Original languageEnglish
Title of host publication2006 IEEE International Conference on Acoustics, Speech, and Signal Processing - Proceedings
DOIs
StatePublished - 1 Dec 2006
Event2006 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2006 - Toulouse, France
Duration: 14 May 200619 May 2006

Publication series

NameICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
Volume3
ISSN (Print)1520-6149

Conference

Conference2006 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2006
CountryFrance
CityToulouse
Period14/05/0619/05/06

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    Yu, C. Y., Chen, S-G., & Chih, J. C. (2006). Efficient CORDIC designs for multi-mode OFDM FFT. In 2006 IEEE International Conference on Acoustics, Speech, and Signal Processing - Proceedings [1660834] (ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings; Vol. 3). https://doi.org/10.1109/ICASSP.2006.1660834