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題 名 | A Unidirectional Cordic Algorithm for Angle Computation and Rotation=單向CORDIC「座標旋轉數位計算」演算法 |
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作 者 | 羅浩榮; | 書刊名 | 中國工程學刊 |
卷 期 | 20:6 1997.11[民86.11] |
頁 次 | 頁693-700 |
分類號 | 448.57 |
關鍵詞 | 角旋轉函數計算; 座標軸角旋轉範圍; 單向旋轉收斂; Angle calculation and rotation; Convergence range CORDIC; Unidirectional convergence; |
語 文 | 英文(English) |
中文摘要 | 單向CORDIC演算法:這是一個創新的計算技術應用於CORDIC(座標旋轉數位計算), 這方法提出單向旋轉計算而非舊的雙向旋轉計算,應用此方法可以將一任意角度Z□的COSZ□和SINZ□ 計算出來,在不增加硬體元件並且必須用遞迴的方式去選擇方向旋轉計算情況下,這個硬體架構較 簡單而且計算所需時間減少,這個方法以數學式證明可以快速的趨近於一個方向收斂而精確計算三 角函數值。 |
英文摘要 | An innovative approach to CORDIC(Coordinate Rotation Digital Computer) computing is presented. This method features unidirectional rotation, unlike most other more conventional methods, which are bidirectional. A specified angle Z□ is approached by this method so that the coz□ and sinz□ are computed. Since no additional hardware components are required to decide the rotation direction for each iteration, the architecture is thus simple, and is expected to be reduced 20% of the area compared with conventional CORDIC technizues. Latency time is also reduced. Although a variable scaling factor should be used, only the first two or three iterations are required because after that, the scaling factor, cosα□, approaches 1as□ <2□. This method guarantees rapid acceleration toward convergence in one direction during trigonometric function computation. |
本系統中英文摘要資訊取自各篇刊載內容。