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Efficient IFFT Architecture Design for OFDM Applications
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- Authors
- In-Gul Jang, Dae-Ho Kim, Ho-Yun Yi, Jin-Gyun Chung, Kyung-Ju Cho
- Issue Date
- 2012-11
- Citation
- International SoC Design Conference (ISOCC) 2012, pp.231-234
- Publisher
- IEEE
- Language
- English
- Type
- Conference Paper
- Abstract
- In this paper, to reduce the memory size of inverse Fourier transform (IFFT) for OFDM-based applications, we propose a new IFFT design technique based on a signed integer mapping of three IFFT input signals: modulated data, pilot and null signals. The proposed method focuses on reducing the size of memory cells in the first two stages of the single-path delay feedback (SDF) IFFT architectures since the first two stages require 75% of the overall memory cells. By Synopsys simulation of the first two stages of IFFT, it is shown that the proposed method achieves about 77.7% reduction in area compared with the conventional method, and about 36.9% reduction compared with CIM method. © 2012 IEEE.
- KSP Keywords
- Architecture Design, Conventional methods, Design techniques, Memory size, inverse Fourier transform, memory cell, single-path delay feedback(SDF)