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題 名 | Design and Testing of a Mixed Signal Matched Filter for IS-95 CDMA Code Acquisition=適用於IS-95碼攫取之混合信號匹配濾波器 |
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作 者 | 蘇朝琴; 林弘佶; 周世傑; | 書刊名 | Proceedings of the National Science Council : Part A, Physical Science and Engineering |
卷 期 | 22:1 1998.01[民87.01] |
頁 次 | 頁95-102 |
分類號 | 448.5 |
關鍵詞 | IS-95碼; 混合信號匹配濾波器; 直接序列展頻技術; Matched filter; Mixed signal design; VLSI; Direct sequence spread spectrum; CDMA; |
語 文 | 英文(English) |
中文摘要 | 直接序列展頻技術已成為行動通訊的主要方法。主要的原因,在於它能提供較佳 的多工、干擾的豁免、以及通信的保密。在直接序列的碼獲取電路中,匹配濾波器為一主要 的元件。在此一論文中,我們將發表一個混合信號匹配濾波器的設計、製作、及測試。我們 使用簡單的類比電流鏡電路,取代複雜的數位總合電路。此一電路具有規則、面積小、及彈 性使用等的優點。因且我們可以將數個濾波器,串接成一個長度較長的濾波器。我們使用臺 灣積體電路零點八微米的製程,製作了一個 128 級的匹配濾波器。 該積體電路的直流與交 流的測試,驗證了我們所提架構的可行性。 |
英文摘要 | Due to its adynatages in multiple access, interference rejection, multipath mitigation, and access security, the direct-sequence spread spectrum (DS-SS) become very popular in mobile communication. For code acquisition of DS-SS signals, matched filters are the key components. This paper pressents the design, implementation, and testing of a mixed signal matched filter. The proposed filter uses simple current mirrors to reduce the complexity of the cruciwal summation circuitry. The circuit is small in size and regular in structure; hence, one can cascade several to produce a filter of longer length. A 128-tap test chip has been implemented in a 2.5 mm�惡ore by means of 0.8 μm SPDM digital CMOS technology. The DC and AC measurements confirm the feasibility of the design. |
本系統中英文摘要資訊取自各篇刊載內容。