簡易檢索 / 詳目顯示

研究生: 張健銘
Chang, Chien-Ming
論文名稱: 同碼循環位移多重擷取技術
Identical Code Cyclic Shift (ICCS) Multiple Access Technology
指導教授: 陳曉華
Chen, Hsiao-Hwa
學位類別: 碩士
Master
系所名稱: 工學院 - 工程科學系
Department of Engineering Science
論文出版年: 2013
畢業學年度: 101
語文別: 英文
論文頁數: 114
中文關鍵詞: 同碼循環位移多重擷取技術
外文關鍵詞: Identical Code Cyclic Shift (ICCS), Multiple Access Technology
相關次數: 點閱:108下載:1
分享至:
查詢本校圖書館目錄 查詢臺灣博碩士論文知識加值系統 勘誤回報
  • 近年來,隨著無線通訊的需求量日益增大,相對的無線通訊所面臨的問題,像是用戶數的急遽成長、通道遭受到的多用戶及多路徑干擾等等,是現今通訊技術不可避免的挑戰。

    而本篇論文介紹的同碼循環位移(ICCS)技術,是以領航訊號在個別分時傳送的情況下,避免在領航訊號通道受到多用戶的干擾,以便進行精準的通道估測;另外,在調變及解調時個別用戶將領航訊號及資料訊號乘上屬於自己的同碼循環位移項,如此一來,在用戶數不變的情形下,只用到一個碼組就可以進行訊號的估測。另一方面,除了改進原本同碼循環位移技術的缺點之外,針對互補碼系統也設計了多頻率的架構,讓系統在更多用戶的情況下,還是能維持一定的性能。

    Recently, with the increasing requirements of wireless communications, same problems are inevitable challenges for wireless communications, such as rapid growth in the number of users, and the channel suffering from multi-user interference and multi-path interference.

    This thesis introduces the Identical Code Cyclic Shift (ICCS) technology, where pilot signals are transmitted by time division to avoid pilot channel suffering from multi-user interference, for estimating channel more accurate. Additionally, data signal and pilot signal are multiplied by individual user's identical code cyclic shift term in modulation and demodulation. In this way, users only need one code to detect signal at same users. In addition to improve shortcoming of the original Identical Code Cyclic Shift technology, it is also designed for complementary code structure with multi-frequency, it can keep good performance even if user number is large.

    摘要i Abstract iii Acknowledgements v Table of Contents vii List of Figures xi List of Tables xix Abbreviations xxi Symbols xxiii Dedication xxv 1 Introduction 1 2 Multi-Code Based Identical Code Cyclic Shift (ICCS) Multiple Access Technology 3 2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.2 System Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.3 Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.3.1 Pilot Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.3.2 Data Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.4 Channel Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.5 Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.5.1 Signal in Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.5.2 Pilot Signal Process . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.5.3 Data Signal Process . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2.6 Bit Error Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 2.7 Performance Comparison . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 3 Single Code Based Identical Code Cyclic Shift (ICCS) Multiple Access Technology 35 3.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 3.2 System Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 3.3 Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 3.3.1 Pilot Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 3.3.2 Data Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 3.4 Channel Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 3.5 Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 3.5.1 Signal in Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 3.5.2 Pilot Signal Process . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 3.5.3 Data Signal Process . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 3.6 Bit Error Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 3.7 Performance Comparison . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 4 Complementary Code Based Identical Code Cyclic Shift (ICCS) Multiple Access Technology 71 4.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 4.2 System Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73 4.3 Transmitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 4.3.1 Pilot Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 4.3.2 Data Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 4.4 Channel Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 4.5 Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 4.5.1 Signal in Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78 4.5.2 Pilot Signal Process . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 4.5.3 Data Signal Process . . . . . . . . . . . . . . . . . . . . . . . . . . . 82 4.6 Bit Error Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86 4.7 Performance Comparison . . . . . . . . . . . . . . . . . . . . . . . . . . . 94 5 Conclusion 105 5.1 Features of ICCS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105 5.2 Difficulties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106 5.3 Future Works . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106 Bibliography 109 A Problems of asynchronous ICCS system 111

    [1] Yi-Ning Chang, ”Study on Pilot Assisted CDMA Multi-user Signal Detection Algorithms”, MSc. Thesis, National Chung-Hsing University, 2001.
    [2] Hsiao-Hwa Chen and Yi-Ning Chang, ”A New Pilot-Added CDMA Multiuser Detection Scheme - SCCS Detector and Its Performance in Multipath Channels”, IEEE 8th International Symposium on Computers and Communication vol.2 pp. 925-929 Jul, 2003.
    [3] Hsiao-Hwa Chen, ”The Next Generation CDMA Techniologies”, ISBN 978-0-470-02294-8, Wiley, 2007.
    [4] Hong-Ming Syu, ”Complementary-Coded Scrambling Multiple Access (CCSMA) and Its Application in MIMO Systems”, MSc. Thesis, National Cheng-Kung University, 2012.
    [5] Pei-Yu Yang, ”Performance Analysis of MIMO-CDMA Systems with Space-Time-Frequency Coding”, MSc. Thesis, National Cheng-Kung University, 2011.
    [6] Hsin-Wei Chu, ”CDMA signature code design for future wireless applications”, MSc. Thesis, National Sun Yat-sen University, 2003.

    下載圖示 校內:2018-08-30公開
    校外:2018-08-30公開
    QR CODE