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姓名 張靜宜(Chin-Yi Chang) 查詢紙本館藏 畢業系所 通訊工程學系 論文名稱 先進長程演進系統中載波聚合技術的初始同步
(Initial Synchronization in Carrier Aggregation Scenarios Applied on LTE-A Communications)
★ 運用SIFT特徵進行光學影像目標識別 ★ 語音關鍵詞辨識擷取系統 ★ 適用於筆記型電腦之WiMAX天線研究 ★ 應用於凱氏天線X頻段之低雜訊放大器設計 ★ 適用於802.11a/b/g WLAN USB dongle曲折型單極天線設計改良 ★ 應用於行動裝置上的雙頻(GPS/BT)天線 ★ SDH設備單體潛伏性障礙效能分析與維運技術 ★ 無風扇嵌入式觸控液晶平板系統小型化之設計 ★ 自動化RFID海關通關系統設計 ★ 發展軟體演算實現線性調頻連續波雷達測距系統之設計 ★ 近場通訊之智慧倉儲管理 ★ 在Android 平台上實現NFC 室內定位 ★ Android應用程式開發之電子化設備巡檢 ★ 鏈路預算估測預期台灣衛星通訊的發展 ★ 在中上衰落通道中分集結合技術之二階統計特性 ★ 基於干擾對齊方法於多用戶多天線下之聯合預編碼器及解碼器設計 檔案 [Endnote RIS 格式] [Bibtex 格式] [相關文章] [文章引用] [完整記錄] [館藏目錄] 至系統瀏覽論文 ( 永不開放) 摘要(中) 近年來，在關於未來的4G通訊系統競爭中，IMT-Advanced 提出的長程演進系統(Long Term Evolution, LTE)越來越受到注目。而為了因應使用者在未來對於頻寬的高需求量，並達到 IMT-Advanced所制定的最大下載資料傳輸速率：1Gbps，最大上傳資料傳輸速率：500Mbps，IMT-Advanced進一步提出的LTE的進化版本( LTE-Advanced, LTE-A)，提出了一種新的技術: 頻帶聚合 (Carrier Aggregation, CA)，來滿足使用者對於頻寬的高需求量。
在現有的LTE蜂巢系統下，一個使用者裝置只會與一個基地台做連接。因此，使用者需要快速的與所屬的基地台建立連接，並讓使用者和基地台同步。而LTE及LTE-A在下行鏈路採用的是正交分頻多工存取系統(Orthogonal Frequency Division Multiplexing Access, OFDMA)。而其同步的做法大約可分為以下的步驟：第一步，使用延遲自相關找出訊號時序 (frame timing) 與主要同步訊號 (primary synchronization signal, PSS)，再以此時序開始做小數點時間與小數點頻率估測。第二步，利用匹配濾波器以主要同步訊號來估測整數頻率偏移。
摘要(英) Since the demand of high speed mobile broadband services, the International Telecommunication Union - Radio Communication Sector (ITU-R) has proposed the next generation mobile communication system Long term evolution advanced (LTE-Advanced) which will retain most of the system construction in Long term evolution (LTE) and increase the performance of it.
Then, LTE-Advanced proposes carrier aggregation (CA) to aggregate component carriers (CCs) which I belonging to contiguous or non-contiguous frequency bands and it is used to meet the specification of future International Mobile Telecommunication – Advanced (IMT-Advanced) mobile systems: peak data rates up to 1Gbps in downlink and 500Mbps in uplink.
In original cellular system in LTE, user equipment (UE) only needs to establish a connection with a best serving evolved-Node B (e-NB). So, UE needs to establish a connection and synchronize with the e-NB. The steps of synchronization are as follows: (1). Using the delay auto-correlation to find frame timing and the P-SCH (primary synchronization signal), and then use the sequence to estimate the symbol timing and the fractional frequency offset. (2). Using the match filter with the P-SCH to estimate the integer frequency offset [1-3].
In the thesis, we propose a new structure for CA to establish the connections between UE and base stations at the same time and the UE can get the frequency offsets and synchronize with the base stations as soon as possible.
關鍵字(中) ★ 頻帶聚合 關鍵字(英) ★ LTE-A
論文目次 Chapter 1. Introduction
1.1. Background ······························································································1
1.2. Motivation ································································································2
1.3. Organization ·····························································································2
Chapter 2. Introduction of Carrier Aggregation
2.1. Preliminary ·······························································································4
2.2. Spectrum Scenarios ··················································································4
2.2.1. Intraband contiguous CA ··································································4
2.2.2. Intraband non-contiguous CA ···························································4
2.2.3. Interband non-contiguous CA ···························································5
2.3. Deployment scenarios ···············································································5
2.4. Implementation of UE in the aggregation ·················································7
Chapter 3. OFDM Basic
3.1. Preliminary ····························································································· 10
3.2. Generation of subcarrier ········································································· 10
3.3. Guard time and cyclic prefix ·································································· 12
3.4. OFDM structure ·····································································································13
3.5. Synchronization ······················································································ 14
3.6. Timing synchronization ·································································· 14
3.6.1. Time synchronization: sample timing offset ··································· 15
3.6.2. Time synchronization: symbol timing offset ··································· 15
3.6.3. Timing estimation method ······························································ 17
3.7. Frequency synchronization ····································································· 19
3.7.1. Harmonic model ············································································· 20
3.7.2. MUSIC algorithm ··········································································· 24
3.7.3. root-MUSIC algorithm ··································································· 25
Chapter 4. OFDM Frequency Offset Estimation with Carrier
4.1. Preliminary ····························································································· 27
4.2. Multiple RF chains ················································································· 27
4.3. Proposed multiple RF chains ·································································· 29
4.3.1. System model and assumption ························································ 29
4.3.2. Proposed preamble and the model ····························································31
4.3.3. Carrier frequency offsets estimation ··············································· 32
4.3.4. Two CFO Mapping Methods ·····································································39
Chapter 5. Simulation and Discussion
5.1. System and channel parameters ······························································ 43
5.2. Carrier aggregation with 5 component carriers ······································· 46
5.2.1. Detection error rate performance ···················································· 46
5.2.2. MSE performance ··········································································· 51
Chapter 6. Conclusion and Future Work
6.1. Conclusion ······························································································ 59
6.2. Future work ···························································································· 59
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指導教授 林嘉慶(Jia-chin Lin) 審核日期 2011-8-19 推文 facebook plurk twitter funp google live udn HD myshare reddit netvibes friend youpush delicious baidu 網路書籤 Google bookmarks del.icio.us hemidemi myshare