博碩士論文 995303005 詳細資訊




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姓名 葉光益(Guang-yi Ye)  查詢紙本館藏   畢業系所 通訊工程學系在職專班
論文名稱 LTE- TDD/FDD蜂巢身份搜尋
(LTE- TDD/FDD Cellular Identity Search)
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摘要(中) 在行動通訊系統中,訊號傳輸過程常因為周圍環境因素形成多重路徑傳輸通道現象,使得傳輸信號受到干擾,因此本篇論文最主要是在探討LTE(long term evolution)下行鏈路在多重路徑干擾時的蜂巢確認問題。在本論文中,我們使用Jakes模型來模擬Rayleigh衰減通道,並且以3GPP測試規範的城市通道環境下進行實驗。由於LTE的蜂巢身份(cell identity, cell-ID)是由區段身份(sector-ID)和蜂巢身份群(cell-ID group)組成504個身份代碼,如何有效且快速的與所服務的基地台建立連接是系統必須克服的一項問題,因此本篇論文模擬實驗主要提供LTE-TDD與LTE-FDD對於區段身份的估測和蜂巢身份群的確認方法進行效能分析,其中是以匹配濾波器(matched filter)、部分相關器(partial correlator)與差分相關器(differential correlator)三種非同調檢測方式為主。
在模擬實驗中,我們提供LTE-TDD與LTE-FDD三個分析比較的模擬結果如下所述:首先分析的是訊框時序(frame timing)的估測效能。分析二為區段身份(sector-ID)與整數頻率偏移( integral frequency offset)偵測之效能。最後分析是蜂巢身份群(cell-ID group)確認的效能。
摘要(英) In mobile communication systems, the signal is dispersed by environment which is called multipath effect, leading to significant distortion. This thesis focuses on the cell identification problem in presence of multipath dispersion in downlink LTE. We employ Jakes model for Rayleigh fading simulation purpose under mobility condition. We adopt the urban channel profile in 3GPP specification for simulation. Due to the fact that the cell-ID contains 504 combinations composed by different sector-ID and cell-ID group, one major problem lies in that how to establish link connection with the base station in service. This thesis provides performance analysis and simulation for sector-ID and cell-ID group identification methods under LTE-TDD as well as LTE-FDD. It mainly covers the non-coherent methods of matched filter, partial correlator, and differential correlator.
We provide three sets of simulation results for LTE-TDD and LTE-FDD: firstly, the frame timing performance is analyzed; secondly, we obtain the performance of sector-ID detection and integral frequency offset estimation; last but not least, we demonstrate the results of cell-ID group identification.
關鍵字(中) ★ 蜂巢身份搜尋 關鍵字(英) ★ Cellular Identity
論文目次 目錄
中文摘要 i
英文摘要 ii
誌謝 iii
目錄 iv
圖目錄 vi
表目錄 viii
第一章 緒論 1
1.1 研究背景 1
1.2 研究動機 2
1.3 研究目的 3
1.4 各章要點 4
第二章 LTE的傳輸技術與系統結構 5
2.1 技術基礎 5
2.1.1 單載波與多載波傳輸 5
2.1.2 載波間的正交 7
2.1.3 保護時間與循環前置 9
2.1.4 正交分頻多工技術的實現 11
2.1.5正交分頻多重接取系統 13
2.2 下行傳輸的訊框結構 15
2.3 分時雙工的保護區間 20
2.4 下行傳輸系統參數 22
2.5同步訊號 25
第三章 同步與蜂巢搜尋的方法 28
3.1 搜尋程序 28
3.2 符元時序與載波頻率 29
3.3 區段與蜂巢身份辨識 33
3.4蜂巢辨識演算流程 39
第四章 模擬實驗分析 40
4.1 系統參數 40
4.2 通道模型與環境參數 41
4.3 系統模擬 43
4.3.1 訊框時序的估測效能 43
4.3.2 區段身份與整數頻率偏移估測之效能 44
4.3.3 蜂巢身份群的偵測效能 48
第五章 結論與展望 54
參考文獻 55
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[2]Hao Cao, Chixiang Ma and Ping Lin, Beijing Embedded System Key Lab, Beijing University of Technology, Beijing, China. “An Area-efficient Implementation of Primary Synchronization Signal Detection in LTE.”
[3]Bo-Jhong Tsao. “ Cell Search for 3GPP LTE Communication System.,” 2009.
[4]Manolakis, K., Gutierrez Estevez, D.M., Jungnickel, V., Wen Xu and Drewes, C.” A Closed Concept for Synchronization and Cell Search in 3GPP LTE Systems,” IEEE Wireless Communications and Networking Conference, pp. 1 – 6, 2009.
[5]R. H. Clake, 1968, “A statistical theory of mobile-radio reception,” BellSystems Technical Journal, Vol. 47, pp. 957-1000.
[6]T. S. Rappaport, Wireless Communications: Principles and Practice, 2nd ed. Englewood Cliffs, NJ: Prentice-Hall, 1996.
[7]Y. Li, Y. L. Guan, 2000, “Modified Jakes’ Model for Simulating Multiple Uncorrelated Fading Waveforms,” IEEE VTC 2000 Tokyo, pp.1819-1822.
[8]3GPP, TR 25.943 (V8.0.0), “Deployment aspects,” December 2008.
[9]B. Sklar, 1997, “Rayleigh Fading Channels in Mobile Digital Communication Systems Part 1: Characterization,” IEEE Communication Magazine, pp. 90-100, July.
[10]3GPP TS 36.211 V10.3.0:3rd Generation Partnership Project; Technical Specification Group Radio Access (E-UTRA); Physical Channels and Modulation
[11]Zou W.Y., and Yiyan Wu, “COFDM: An overview,” IEEE Trans. On Broadcasting, vol. 41, no. 1, pp. 1 –8, Mar. 1995.
[12]Lajos Hanzo, William Webb, and Thomas Keller, Single and multicarrier modulation: Principles and applications, 2nd edition, IEEE Computer Society.
[13]3GPP, “TR 25.913 v7.0.0; Requirements for Evolved UTRA (E-UTRA) and Evolved UTRAN (EUTRAN),” v7.0.0
[14]3GPP Americas, “3GPP LTE for TDD Spectrum in the Americas,” November 2009
[15]T. Ali-Yahiya, “Understanding LTE and its Performance,” Springer Science+Business Media, LLC 2011
[16]J.-J van de Beek, M. Sandell, and P.O. Borjesson, “ML estimation of time and frequency offset in OFDM systems,” IEEE Transactions on Signal Processing, vol. 45, no 7, pp. 1800-1805, July 1997.
[17]Erik Dahlman, Stefan Parkvall, Johan Skold, Per Beming, 3G Evolution HSPA and LTE for Mobile Broadband, Academic Press.,2007.
[18]Jia-Chin Lin, A. Chen and V. Ma, “Maximum-likelihood fine frame timing and frequency offset estimation for OFDM communication over a Rayleigh fading channel,”IEEE Global Telecommunications Conference, vol. 1, pp. 686-690, November 2002.
[19]Jia-Chin Lin, “Frequency offset estimation by differentially coherent frequency error characterization for OFDM wireless communications,” IEEE International Conference Communications, vol. 4, pp. 2387-2391, June 2004.
[20]Yinigmin Tsai and Guodong Zhang, “time and frequency synchronization for 3GPP LTE Long Term Evolution Systems”, IEEE Vehicular Technology Conference, 65th VTC2007-Spring, April 2007.
[21]J.-C. Lin, “Coarse frequency offset acquisition via subcarrier differential detection for OFDM communication,” IEEE Trans. Commum., vol. 54, no. 8, pp. 1415-1426, Aug 2006.
[22]Feng Wang, Yu Zhu, Member, IEEE, and Zongxin Wang, Member, IEEE “A Low Complexity Scheme for S-SCH Detection in 3GPP LTE Downlink System.”
[23]Yunxin Li, and Xiaojing Huang, “the simulation of independent Rayleigh Faders,” IEEE Transactions on Communications, vol. 50, no. 9, pp. 1503-1514, Sep. 2002.
[24]James Zyren and Dr. Wes McCoy, Freescale Semiconductor, “Overview of the 3GPP LTE Physical Layer”
[25]J.-C. Lin, “Maximum-likelihood frame timing instant and frequency offset estimation for OFDM communication over a fast rayleigh-fading channel,” IEEE Trans. Veh. Technol., vol. 52, no. 4, pp. 1049-1062, Jul. 2003.
[26]J.-C. Lin, “A frequency offset estimation technique based on frequency error characterization for OFDM communication on time-varying multipath fading channels,” IEEE Trans. Vehic. Technol., vol. 56, no. 3, pp. 1209-1222, May 2007.
[27]Jung-In Kim, Jung-Su Hee-Jin Roh, and Hyung-Jin Choi, “SSS Detection Method for Initial Cell Search in 3GPP LTE FDD/TDD Dual Mode Receiver.” 9th International Symposium on Communications and Information Technology, 28-30, pp. 199-20, September 2009.
指導教授 林嘉慶(Jia-chin Lin) 審核日期 2012-6-5
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