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In this work we consider optimized twiddle factor multipliers based on shift-and-add-multiplication. We propose a low-complexity structure for twiddle factors with a resolution of 32 points. Furthermore, we propose a slightly modified version of a previously reported multiplier for a resolution of 16 points with lower round-off noise. For completeness we also include results on optimal coefficients for eight-points resolution. We perform finite word length analysis for both coefficients and round-off errors and derive optimized coefficients with minimum complexity for varying requirements.<p>Funding Agencies|Higher Education Commission, Pakistan||Linkoping University, Sweden||</p

Low-Complexity Constant Multiplication Based on Trigonometric Identities with Applications to FFTs