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Design of an IFFT∪FFT processor with manipulated coefficients based on the statistics distribution for OFDM  

Choi, Won-Chul (Dept. of Computer and Communication Engineering, Chungbuk National University)
Lee, Hyun (Electronics and Telecommunications Research Institute)
Cho, Kyoung-Rok (Dept. of Computer and Communication Engineering, Chungbuk National University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SD / v.40, no.12, 2003 , pp. 87-94 More about this Journal
Abstract
In this paper, we propose an IFFT/FFT design method to minimize quantization error in IEEE 802.11a WLAN. In the proposed algorithm, the twiddle coefficient of IFFT/FFT processor is manipulated by the statistics distribution of the input data at each stage. We applies this algorithm to radix-2/$^2$ SDF architecture. Both IFFT and FFT processor shares the circuit blocks cause to the symmetric architecture. The maximum quantization error with the 10 bits length of the input and output data is 0.0021 in IFFT and FFT that has a self-loop structure with the proposed method. As a result, the proposed architecture saves 3bits for the data to keep the same resolution compared with the conventional method.
Keywords
FFT processor; IEEE 802.11a WLAN; OFDM;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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