Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/6371
標題: 直接序列超寬頻與多頻帶正交分頻多工訊號在無線感測網路中分散式測距上之應用
Distributed Ranging Using DS-UWB and MB-OFDM Signalling for Wireless Sensor Networks
作者: 陳俊國
Chen, Jun-Koh
關鍵字: DS-UWB;直接序列超寬頻;MB-OFDM;Ranging;Wireless Sensor Networks;多頻帶正交分頻多工;距離測量;無線感測網路
出版社: 電機工程學系所
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[6]Chiara Falsi, Davide Dardari, Lorenzo Mucchi, and Moe Z. Win, “Time of Arrival Estimation for UWB Localizers in Realistic Environments,” EURASIP Journal on Applied Signal Processing, vol. 2006, Article ID 32082, 13 pages, 2006. [7]Y. Ohhikata and T. Kobayashi, “Proposal for an MB-OFDM UWB system simultaneously undertaking ranging and communications,” in 2005 IEEE International Conference on Ultra-Wideband, Zurich, Switzerland, pp. 64-67, Sept. 5-8, 2005. [8]R. Cardinali, L. De Nardis, P. Lombardo, and M.-G. Di Benedetto, “Theoretical bounds for ranging with multi band OFDM and direct sequence UWB signals,” in Proc. 14th IST Mobile Wireless Commun. Summit, Dresden, Germany, Jun. 19-23, 2005. [9]R. Cardinali, L. De Nardis, P. Lombardo, and M.-G. Di Benedetto,”UWB ranging accuracy for applications within IEEE 802.15.3a,” in Proc. Networking With Ultra Wide Band and Workshop on Ultra WideBand for Sensor Networks, Rome, Italy, pp. 65-69, Jul. 2005. [10]R. Cardinali, L. De Nardis, P. Lombardo, and M.-G. Di Benedetto,”Lower bounds for ranging accuracy with multi band OFDM and direct sequence UWB signals,” in Proc. IEEE Int. Conf. UWB, Zurich,Switzerland, pp. 302-307, Sep. 2005. [11]R. Cardinali, L. De Nardis, P. Lombardo and M.-G. Di Benedetto, "UWB Ranging Accuracy in High and Low Data Rate Applications," Special Issue on UWB, IEEE Transactions on Microwave Theory and Techniques, Volume 54, Issue 4, pp. 1865 - 1875, April 2006. [12]J. Y. Lee and R. A. Scholtz, “Ranging in a dense multipath environment using an UWB radio link,” IEEE J. Select. Areas Commun., vol. 20, no. 9, pp. 1677-1683, Dec. 2002. [13]B. Denis, J.-B. Pierrot, and Abou-Rjeily, C., “Joint Distributed Synchronization and Positioning in UWB Ad Hoc Networks Using TOA,” IEEE Trans. Microwave Theory and Techniques, vol. 54, no. 4, pp. 1896 - 1911,June 2006. [14]Matt Welborn, “XtremeSpectrum CFP Presentation (doc: IEEE 802.15-03/154r3),” IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs), July 2003. [15]R. Fisher et al., “DS-UWB Physical Layer Submission to 802.15 Task Group 3a,” IEEE 802.15-04/0137r3, July 2004. [16]R. Fisher et al., “DS-UWB physical layer submission to 802.15 task group 3a,” IEEE 802.15-04/0137r4, Jan. 2005. [17]A. Batra et al., “Multi-band OFDM Physical Layer Proposal for IEEE 802.15 Task Group 3a,” IEEE 802.15-03/268r3, Texas Instruments et al., March 2004. [18]A. Batra et al., “Multiband OFDM physical layer proposal for IEEE 802.15 Task Group 3a”, Multiband OFDM Alliance SIG, Sep. 2004. [19]A. Batra, J. Balakrishnan, G.R. Aiello, J. R. Foerster, A. Dabak, “Design of A Multiband OFDM System for Realistic UWB Channel Environments,” IEEE Transactions on Microwave Theory and Techniques, pp.2123-2138, Sept. 2004. [20]S. Gezici, T. Zhi, G. B. Giannakis, H. Kobayashi, A. F. Molisch, H. V. Poor, and Z. Sahinoglu, “Localization via ultra-sideband radios: A look at positioning aspects for future sensor networks,” IEEE Signal Process. Mag., vol. 22, no. 4, pp. 70-84, Jul. 2005. [21]C. C. Chong, Y. Kim and S. S. Lee, “Statistical characterization of the UWB propagation channel in various types of high-rise apartments,” Proc. IEEE Wireless Commun. Networking Conf. (WCNC 2005), vol. 2, pp. 944-949, New Orleans, LA, USA, March 2005. [22]A.F. Molisch, J.R. Foerster, and M. Pendergrass, “Channel models for ultrawideband personal area networks,” IEEE Wireless Commun., vol. 10, no. 6, pp. 14-21, Dec. 2003. [23]C.-Y. Wen, R. D. Morris, and W. A. Sethares,“Distance Estimation Using Bidirectional Communications Without Synchronous Clocking,” in IEEE Transactions on Signal Processing, April 2007. [24]C.-Y. Wen, J.-K. Chen, and W. A. Sethares, “Joint Distributed Clustering and Ranging for Wireless Ad-Hoc Sensor Networks,” (to appear in Proceedings of IEEE VTC2007-Spring, Dublin, April 2007). [25]F. Zhao and L. Guibas, Wireless Sensor Networks: An Information Processing Approach, Morgan Kaufmann, CA, 2004. [26]V. Lottici, A. D'Andrea, and U. Mengali, “Channel Estimation for Ultra-Wideband Communications,” IEEE J. Select. Areas Commun., vol. 20, pp. 1638-1645, Dec. 2002. [27]L. Huang and C. C. Ko, “Performance of Maximum-Likelihood Channel Estimator for UWB Communcations,” IEEE Commun. Lett., vol. 8, pp. 356-358, June 2004.
摘要: 
本篇論文的主旨是探討直接序列超寬頻(Direct Sequence Ultra-WideBand,DS-UWB) 與多頻帶正交分頻多工 (Multi-Band Orthogonal Frequency Division Multiplexing,MB-OFDM) 這兩種技術的信號格式在不同估測環境下的測距精確度(ranging accuracy)。由於超寬頻 (Ultra-WideBand,UWB) 信號具有良好的時間解析能力,因此我們使用以時間為測量基礎的測距系統,並測量信號的傳播時間 (propagation time) 來估測無線感測網路 (wireless sensor networks) 中兩個節點之間的距離。
在論文中討論的重點主要分為兩個部份:(1) 當兩個節點之間的時間同步時,我們經由兩種不同的觀點來分析DS-UWB和MB-OFDM的測距精確度;(2) 當兩個節點之間的時間不同步時,我們藉由非同步時鐘之距離估測 (Distance Estimation via Asynchronous Clocks,DEVAC) 演算法來達成兩個節點之間的同步與測距。由分析結果可知,在UWB的五種信號格式下,DS-UWB High Band的信號格式因為使用較高的頻帶及較寬的運作頻寬,故在不同的估測環境下均可得到較佳的測距精確度。

The main purpose of this thesis is to study ranging accuracy using Direct Sequence Ultra-WideBand (DS-UWB) and Multi-Band Orthogonal Frequency Division Multiplexing (MB-OFDM) signalling under different estimation environments. Because of good timing resolution in Ultra-WideBand (UWB) systems, time-based schemes are chosen for ranging in wireless sensor networks. Based on the measurement of signal propagation time, the distance between two sensors can be estimated.
This thesis discusses the following two major parts: (1) The ranging accuracy using DS-UWB and MB-OFDM signalling with time synchronization; (2) The ranging accuracy using the Distance Estimation via Asynchronous Clocks (DEVAC) algorithm without time synchronization. Numerical results show that DS-UWB High Band has better ranging accuracy in different estimation environments, due to its higher operation frequency and larger bandwidth.
URI: http://hdl.handle.net/11455/6371
其他識別: U0005-1501200711374500
Appears in Collections:電機工程學系所

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