Robust Digital Filter Design for In-band Quantization Noise Reduction in Cascaded Sigma-Delta Modulators
學年 98
學期 1
發表日期 2009-11-27
作品名稱 Robust Digital Filter Design for In-band Quantization Noise Reduction in Cascaded 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 Mechanical Engineering Department NTUT; the Chinese Automatic Control Society IEEE
會議名稱 2009 CACS International Automatic Control Conference
會議地點 Taipei, Taiwan
摘要 This study investigates the problem of robust H∞ filtering in finite frequency domain for polytopic systems. Robust fixed-order, infinite-impulse-response (IIR) and finite-impulse-response (FIR) designs via indirect approach and direct method are presented. The aforementioned techniques refer to the conventional loop shaping method and that uses recently introduced generalised Kalman-Yakubovich-Popov (GKYP) lemma, respectively. The authors consider a frequency-domain polytopic model which includes two well-known special cases, that is, the interval plants and the set of transfer functions with affinely dependent uncertain parameters belonging to a convex-bounded polyhedral domain. They derive conditions for the existence of linear-time invariant (LTI) filters. These conditions, irrespective of the uncertain parameters, guarantee both asymptotic stability of the polytopic systems and the filters, and a guaranteed H∞ performance in finite frequency domain. Extension of the results to the multi-band case is straightforward, where the advantages of arbitrary filter order and dropping the use of weighting functions is even more obvious. As an example, the authors apply the proposed methods to in-band quantisation noise reduction for uncertain cascaded sigma-delta modulators. By comprehensive comparisons with existing methods, they show the viability and efficiency of their design.
關鍵字
語言 en_US
收錄於
會議性質 國際
校內研討會地點
研討會時間 20091127~20091129
通訊作者
國別 TWN
公開徵稿 Y
出版型式 紙本
出處 2009 CACS International Automatic Control Conference, pp.1155 - 1171
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