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題 名 | 應用FPGA完成適應性數位濾波器 |
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作 者 | 張介仁; | 書刊名 | 宜蘭農工學報 |
卷 期 | 11 1995.12[民84.12] |
頁 次 | 頁61-80 |
分類號 | 448.533 |
關鍵詞 | 適應性數位濾波器; Adaptive digital filter; VLSI; FPGA; |
語 文 | 中文(Chinese) |
中文摘要 | 濾波器在通訊、雷達、控制、航空及生物工程等各方面的重要性已無庸置疑,類 比濾波器受環境的影響,其不穩定使得數位式濾波器相對的重要起來。雖然如此,對於系統 的變化及其非線性的特徵,傳統的數位式濾波器仍需改進,適應性數位濾波器(adaptive digital filter)即為解決此問題因應而生。 VLSI的發展快速進步,使得各方面的系統均可以用IC來完成,配合未來IC設計的方便性以及 目前系統可以即時的驗證性,FPGA(Field Programmable Gate Array)為最佳的執行工具 ,對於專科學校而言,這種可程式化的IC提供了我們極好的設計環境。 本研究獲得以下的幾點改善: 一、更大型的FPGA元件,以提供更大容量,應付較複雜電路。 二、解決時變系統及非線性系統參數對濾波器之影響。 三、以簡便的設計法,改善適應性濾波器之品質。 四、利用快速乘法器做為適應性濾波器之主幹,完成LMS及RLS法則之適應性數位濾波器測試 。 |
英文摘要 | Filter has been importantly applied in such diverse fields as communications, radar, control, airspace, and biomedical engineering. It is traditional technique for using analog filter, but the unstable problem is always a big trouble that analog filter is affected by temperature, humility and other environment condition. So, the digital filter has been important now. But it still need to be improved in nonlinear or time invariant system. Adaptive digital filters give us a stable performance, and also change parameter automatically following by different conditional environment. VLSI technique has been developed so fast that we try adaptive digital filter hardware to be implemented by fast method. Here, FPGA (field programmable gate array) is the best selection for local junior collage situation. This research support following contribution: 1. more capacity FPGA device to implement complicated adaptive filter circuits. 2. solve time variant and nonlinear systmem problem for digital filter. 3. easy and convenient design method, improve adaptive filter performance. 4. complete LMS and RLS adaptive digital filter testing based on fast multiplier hardware stucture. |
本系統中英文摘要資訊取自各篇刊載內容。