Browsing by Author "Kuo, Chih-Bin"

Now showing 1 - 1 of 1

Hybrid word-length optimization methods of pipelined FFT processors
(2007-08-01)
Wang, Cheng-Yeh
;
Kuo, Chih-Bin
;
Jou, Jing-Yang
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
Quickly and accurately predicting the performance based on the requirements for IP-based system implementations optimizes the design and reduces the design time and overall cost. This study describes a novel hybrid method for the word-length optimization of pipelined FFT processors that is the arithmetic kernel of OFDM-based systems. This methodology utilizes the rapid computing of statistical analysis and the accurate evaluation of simulation-based analysis to investigate a speedy optimization flow. A statistical error model for varying word-lengths of PE stages of an FFT processor was developed to support this optimization flow. Experimental results designate that the word-length optimization employing the speedy flow reduces the percentage of the total area of the FFT processor that increases with an increasing FFT length. Finally, the proposed hybrid method requires a shorter prediction time than the absolute simulation-based method does and achieves more accurate outcomes than a statistical calculation does.