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題名 | A Computer Program for Designing Continuous and Discrete Coefficient Pulse Shaping FIR Filters=係數為無限位元及有限位元之FIR數位濾波器之套裝軟體設計 |
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作者 | 賴友專; 徐忠枝; | 書刊名 | 大同學報 |
卷期 | 25 1995.11[民84.11] |
頁次 | 頁311-323+446 |
分類號 | 312.49 |
關鍵詞 | 數位濾波器; 套裝軟體設計; |
語文 | 英文(English) |
中文摘要 | 在通訊系統上,當數位訊號透過有限頻寬的頻道傳送時,訊號彼此間會相互干擾 ,此稱為訊介干擾( ISI )。 在消除訊介干擾的方法中,以交互準位編碼而著名的「部份 頻譜響應法」,便允許一控制量的訊介干擾,所以部份頻譜響應法是基於「因訊介干擾是已 知, 其影響即可被消除」的前提之下來設計濾波器。 在本論文中, 將使用拉氏逼近法( Lagrange multiplier approach )來設計此類通訊用之數位濾波器, 因其很容易加入時軸 和頻軸上之限制條件。 並且, 我們將利用反覆式拉氏逼近法( iterative Lagrange multiplier approach )結合拉氏逼近法及樹形搜尋演算法來設計有限位元之通訊用濾波器 。為了便於一般工程師使用,我們設計一套裝軟體,可用來設計任意之有限位元或最佳化的 Nyquist 濾波器、M-th band 濾波器及 Class 1-5 部份頻譜響應濾波器。 |
英文摘要 | Partial-response signaling is known as correlative level coding wherein the constraint on waveforms is relaxed so as to allow a controlled amount of ISI. Partial-response signaling designs are based on the premise that since the ISI is known, its effect can be removed. In this paper, a computer program is proposed for designing a large class of FIR pulse shaping filters. The Lagrange multiplier approach, which is easy to incorporate both time- and frequency-domain constraints by minimizing a quadratic measure of the error in the design bands, is applied to design such digital filters for communication in this paper. Also, the iterative Lagrange multiplier approach combining the Lagrange multiplier approach and a tree search algorithm is proposed for designing discrete coefficient pulse shaping FIR digital filters. The program can design arbitrary Nyquist filters, M-th band filters and Class 1-5 partial response filters with continuous or discrete coefficients. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。