Simultaneous frequency and time-domain approximation method for discrete-time filters

フォーマット:

論文

責任表示:

Nakayama, Kenji

言語:

英語

出版情報:

Institute of Electrical and Electronics Engineers (IEEE), 1984-12-01

著者名:

Nakayama, Kenji  

掲載情報:

IEEE transactions on circuits and systems

ISSN:

0098-4094      

巻:

31

通号:

12

開始ページ:

1002

終了ページ:

1008

バージョン:

publisher

概要:

金沢大学大学院自然科学研究科情報システム<br />金沢大学工学部<br />A simultaneous frequency- and time-domain approximation method for discrete-time filters is proposed. In the method, transfer function coefficients are divided into two subsets, X//1 and X/ … /2, which are employed for optimizing a time response and a frequency response, respectively. Frequency and time responses are optimized through the iterative Chebyshev approximation method and a method of solving linear equations, respectively. At the rth iteration step, the maximum frequency response error, which appeared at the (r minus 1)th step, is minimized, and X//2**(**r** minus **1**) becomes X//2**(**r**). X//1**(**r**) is obtained from linear equations including X//2**(**r**) as a constant. The frequency response at the rth step is evaluated using the above obtained X//1**(**r**) and X//2**(**r**). This means the optimum time response is always guaranteed in the frequency-response approximation procedure. A design example of a symmetrical impulse response shows the new approach is more efficient than conventional methods from the filter order reduction viewpoint. 続きを見る

URL:

http://hdl.handle.net/2297/3949