教師資料查詢 | 類別: 會議論文 | 教師: 林俊辰 LIN CHUN-CHEN (瀏覽個人網頁)

標題:A Heuristic Finite Frequency H-infinity Filtering Technique with Application to Cascaded 2-1 Sigma-Delta Modulators
學年98
學期2
發表日期2010/07/01
作品名稱A Heuristic Finite Frequency H-infinity Filtering Technique with Application to Cascaded 2-1 Sigma-Delta Modulators
作品名稱(其他語言)
著者Chou, Yung-shan; Lin, Chun-chen; Chang, Yun-lun
作品所屬單位淡江大學電機工程學系
出版者IEEE
會議名稱2010 International Conference on System Science and Engineering (ICSSE)
會議地點Taipei, Taiwan
摘要Due to limited accuracy of the modern fabrication technologies, cascaded sigma-delta modulators could suffer from finite amplifier gain and capacitor mismatch. Unfortunately, these non-ideal analog components cause inevitable mismatch of the analog circuits and digital noise cancellation filters; consequently it leads to a poor signal-to-noise ratio (SNR). In this paper, the SNR performance enhancement problem is formulated as a robust H-infinity filtering problem in finite frequency domain. Specifically, we propose a heuristic finite impulse response (FIR) filter design that deals with the problem by treating the non-ideality as parametric uncertainty in the integrators' pole and zero of the modulators. In contrast with the existing approaches, the proposed design is a direct approach which directly adjusts the gain responses of the noise transfer function to yield high-order noise shaping by searching the coefficients of FIR filters via solving linear matrix inequality (LMI) feasibility problems. We have confirmed the validity of the proposed method via simulations of a cascaded 2-1 modulator with 2% deviation in the analog integrators. Simulation results show that the modulator matched by the proposed filter achieves better SNR performance than that matched by the conventional one.
關鍵字
語言英文(美國)
收錄於
會議性質國際
校內研討會地點
研討會時間20100701~20100703
通訊作者
國別中華民國
公開徵稿Y
出版型式紙本
出處2010 International Conference on System Science and Engineering (ICSSE),p.p401 - 406
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