Browsing by Author "Huang, Hong-An"

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A self-compensation fixed-width booth multiplier and its 128-point FFT applications
(2006)
Huang, Hong-An
;
Liao, Yen-Chin
;
Chang, Hsie-Chia
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
This paper presents a method for compensating the truncation error of fixed-width Booth multipliers which keep the input and the output the same bit-width. The truncated part that produces the carry-out bits is replaced with a carry-estimation equation. In order to reduce the truncation error, different input-width multipliers will have different carry-estimation equations. Simulation results show that our self-compensation method can lead to 85% reduction of truncation errors while compared with direct-truncated multipliers, as well as 40% reduction in area of a multiplier while compared with traditional Booth multipliers. In contrast with the 128-point fast fourier transform (FFT) using traditional Booth multipliers, our approach has 10% area reduction but only 1dB SQNR loss.