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研究生:楊嘉城
研究生(外文):Yang-Chia Cheng
論文名稱:多頻帶正交分頻多工超寬頻通訊系統之全球互通微波存取干擾信號消除
論文名稱(外文):WiMAX Interference Mitigation for MB-OFDM UWB System
指導教授:鄭立德
指導教授(外文):Li-Der Jeng
學位類別:碩士
校院名稱:中原大學
系所名稱:電子工程研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2009
畢業學年度:97
語文別:中文
論文頁數:32
中文關鍵詞:超寬頻多頻帶正交分頻多工系統全球互通微波存取系統窄帶干擾消除適應性濾波器
外文關鍵詞:MB-OFDMLMSnarrowbandUWBWiMAX
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超寬頻(Ultra-Wideband, UWB)系統傳輸於極寬(3.1-10.6GHz,7500MHz)的頻譜下。不可避免的將遭受同頻帶上其它現存系統的干擾,例如本文中操作於3.5GHz的IEEE 802.16 WiMAX系統將對超寬頻系統在效能上造成某種程度上的影響。有鑑於此,本論文設計一多頻帶正交分頻多工(Multi-band Orthogonal Frequency Division Multiplexing, MB-OFDM )超寬頻系統,其系統規格與架構符合ECMA-368標準。在遭受全球互通微波存取系統(Worldwide Interoperability for Microwave Access, WiMAX)的干擾下對其系統效能進行討論。另外,作者提出LMS Adaptive filter、Subcarrier Nulling、 Band Dropping 等降低干擾的方法在錯誤率上比較。
In this paper, a Multi-band Orthogonal Frequency Division Multiplexing (MB-OFDM) system for Ultra-Wideband (UWB) communication based on the ECMA-368 standard is considered. Due to IEEE 802.16 WiMAX (Worldwide Interoperability for Microwave Access) system operates at 3.5GHz band and causes the interference on the MB-OFDM UWB signal. In order to suppress the effect of the co-existing interference on MB-OFDM UWB system, the LMS adaptive filter, Subcarrier nulling, and Band dropping techniques are proposed and compared on BER in this paper.
摘要 ..................................................................................................................................I
ABSTRACT .................................................................................................................. II
目錄 .......................................................................................................................... IV
圖目錄 ............................................................................................................................ V
第一章 緒論 ................................................................................................................. 1
1.1 研究動機 ............................................................................................. 1
1.2 本文架構 ............................................................................................. 2
第二章 多頻帶正交分頻多工系統 ........................................................................... 3
2.1 超寬頻系統簡介 ................................................................................. 3
2.2 系統架構描述 ..................................................................................... 4
第三章 全球互通微波存取系統之干擾模型 ......................................................... 10
3.1 全球互通微波存取系統簡介........................................................... 10
3.2 系統架構描述 ................................................................................. 11
第四章 干擾消除技術 ............................................................................................................ 12
4.1 系統架構描述 ................................................................................... 12
4.2 最小均方適應性濾波器 ................................................................... 16
4.3 子載波指零技術 ............................................................................... 18
4.4 BAND DROPPING ............................................................................... 18
第五章 系統效能之模擬結果 .................................................................................. 19
5.1 MB-OFDM系統於WIMAX系統干擾下之系統效能 .................. 19
第六章 結論 ............................................................................................................... 24
參考文獻 ....................................................................................................................... 25


圖目錄
圖1.1 INTERFERERS SCENARIO AROUND UWB BAND GROUP 1............... 2
圖2.1 超寬頻系統之頻帶分布圖 ........................................................... 4
圖2.2 MB-OFDM使用時-頻碼跳頻圖 .................................................. 6
圖2.3 QPSK 調變星座圖對映 ............................................................... 7
圖2.4 MB-OFDM 符號包含之子載波分布圖 ...................................... 8
圖2.5 OFDM符號構造圖 ....................................................................... 9
圖3.1 WIMAX系統架構 ....................................................................... 11
圖4.1 MB-OFDM系統傳接器架構圖 ................................................. 12
圖4.2 MB-OFDM於第一個次頻帶之頻譜圖 ..................................... 13
圖4.3 MB-OFDM於第二個次頻帶之頻譜圖 ..................................... 13
圖4.4 MB-OFDM於第三個次頻帶之頻譜圖 ..................................... 14
圖4.5 WIMAX於3.5GHZ頻帶之頻譜圖 ........................................... 15
圖4.6 MB-OFDM遭受WIMAX系統干擾於頻於上之情形 ............. 15
圖4.7 LMS 適應性濾波器架構圖 ....................................................... 16
圖4.8 LMS 橫向適應性濾波器 ........................................................... 16
圖5.1 2個子載波指零技術於頻譜上的情形 ...................................... 20
圖5.2 比較使用LMS 適應性濾波器前後於時域上的結果 .............. 20
圖5.3 比較使用LMS 適應性濾波器前後於頻域上表現情形 .......... 20
圖5.4 LMS適應性濾波器收斂情形 .................................................... 21
圖5.5 LMS適應性濾波器收斂後殘餘的干擾信號 ............................ 21
圖5.6 MB-OFDM 遭受下干擾加上干擾消除技術後之性能表現 .... 23
[1]ECMA, “Standard ECMA-386: High Rate Ultra Wideband PHY and M AC Standard,” Dec. 2005, [Online]: http://ecma-international.org -/publications/standards/Ecma-386.htm.

[2]Federal Communication commission (FCC), “Revision of Part 15 of the commissions Rules Regarding Ultra-Wideband Transmission Systems.” First Report and Order, ET Dpcket 98-153, FCC 02-48; Adopted: February 14, 2002; Released: April 22, 2002.

[3]Huy Quang Quach, “Narrowband Interference Detection and Mitigation for Indoor Ultra-Wideband Communication Systems,” Saskatoon Saskatchewan, Canada, November, 2006.

[4]Chris Snow, Lutz Lampe and Robert Schober, “Analysis of the Impact of WiMAX-OFDM Interference on Multiband OFDM, Ultra-Wideband,” 2007. ICUWB IEEE International Conference on.

[5]Chris Snow, Lutz Lampe and Robert Schober, “Interference Mitigation for Coded MB-OFDM UWB, Radio and Wireless Symposium,” 2008 IEEE22-24 Jan. 2008 Page(s): 17 - 20.

[6]K. Shi, Y.Zhou, B. Kelleci, T.W. Fischer, E. Serpedin, and A. I. Karsolayan, “Impacts of Narrowband Interference on OFDM-UWB Receivers: Analysis and Mitigation,” IEEE Trans. Signal Processing, vol. 55, no. 3, pp. 1118-1128, Mar. 2007.

[7]C. Snow, L. Lampe, and R. Schober, “Performance Analysis and Enhancement of Multiband OFDM for UWB Communications,” IEEE Trans. Wireless communication, vol. 6, no. 6, pp. 2182-2192, June 2007.

[8]IEEE Std. 802.16-2004, “Part 16: Air Interface for Fixed Broadband Wireless Access System,” Oct. 2004.

[9]Shridhar Mubaraq Mishra, Robert W.Brodersen, “Detect and Avoid: an Ultra-Wideband / WiMAX coexistence Mechanism,” IEEE Communications Magazine 2007.

[10]Yu T. Su, Li-Der Jeng, “Antijam capability analysis of RS-coded slow frequency-hopped systems”, IEEE Trans. Commun., vol. 48, No. 2. Feb, 2000.

[11]Q. Zhang and T. Le-Ngoc, “Turbo product codes for FH-SS with partial-band interference.” IEEE Trans. Commun., vol. 1, pp. 513-520, July 2002.

[12]R. L. Peterson, R. E. Ziemer, and D. E. Borth, Introduction To Spread Sprectrum Communications, Englewood Cliffs, N.J.:Prentice Hall, 1995.

[13]M. K. Simon, J. K. Omura, R. A. Scholtz, and B. K. Levitt, Spread Sprectrum Communications, Vol. I, Computer Science Press, Inc., Rockville, Md., 1985.

[14]M. B. Pursley, “Frequency-hop transmission for satellite packet switching and terrestrial packet networks.” IEEE Trans. Inform. Theory., vol. IT-32, pp. 652-667, May 1986.

[15]J. G. Proakis, Digital Communication, New York: McGraw-Hill, 4rd ed., 2001

[16]A New Partial-Band Noise Jamming Model for Block Turbo Coded Frequency-Hopped Systems. 2005

[17]Channel and Signal Parameters Estimations for Block Turbo Coded FH-SS System under Jamming Environments. Chun-Liang Chen.

[18]D. Chase, “A class of algorithms for decoding block codes with channel measurement information” IEEE Trans. Inform. Theory, vol. IT-18, pp. 170-182, Jan. 1972.


[19]B. Sklar, Digital Communications Fundamentals and Applications, Upper Saddle River, N.J: Prentice Hall, 2nd ed., 2001.
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