區域性點對多點傳輸系統的同頻干擾效應之評估

以作者查詢圖書館館藏

、以作者查詢臺灣博碩士

、以作者查詢全國書目

、勘誤回報

、線上人數：7

、訪客IP：13.58.217.242

姓名

劉政輝(Cheng-Hui Liu ) 查詢紙本館藏

畢業系所

電機工程研究所

論文名稱

區域性點對多點傳輸系統的同頻干擾效應之評估
(Assessment of Cochannel Interference in Local Multipoint Distribution Systems (LMDS))

相關論文

★ 中華衛星一號電離層電漿電動效應儀(IPEI)資料之頻譜分析	★ 以HHT時頻分析法剖析赤道區電離層F層電漿空腔結構
★ 全球衛星定位系統（GPS）接收器RF module設計與製作	★ 衛星訊號閃爍與電離層不規則體飄移-衛星量測與地面觀測之比較
★ 低軌道衛星通訊系統的通道統計模型	★ 雷達訊號之時頻分析
★ 運用華衛一號資料研究全球低緯區電離層電波訊號閃爍現象

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]

[檢視]

[下載]

本電子論文使用權限為同意立即開放。
已達開放權限電子全文僅授權使用者為學術研究之目的，進行個人非營利性質之檢索、閱讀、列印。
請遵守中華民國著作權法之相關規定，切勿任意重製、散佈、改作、轉貼、播送，以免觸法。

摘要(中)

在無線細胞系統中,同頻干擾效應對於系統效能來說是一個限制的因素,區域性點對多點傳輸系統 Local Multipoint Distribution System (LMDS) 這種固定的無線傳輸系統也不例外。在 LMDS 中下鏈通常是較高容量的,而且較窄的用戶端天線的波束也是排拒同頻干擾的一項因素,所以下鏈的同頻干擾是較嚴重的。因此對LMDS中的下鏈同頻干擾的評估是本篇論文的主旨。
LMDS操作在Ka 波段,而操作在這個頻帶範圍內具有一些限制, 像是雨衰會造成通訊品質的下降且限制無線通訊系統的傳輸路徑長度,植物的葉片也會對信號強度造成衰減並造成信號的退極化,因此在本篇論文中我們將降雨和樹葉所造成的衰減視為多餘路徑衰減的主要來源。
由於在LMDS中用戶端是使用高指向性的天線,因此在天線主波束方向上的干擾源影響較其他者嚴重,所以我們提出一個新的細胞架構來減少這些干擾源的影響。我們只改變其頻帶配置及極化交錯,所以我們可以不必在設備方面作多餘的投資而得到較好的系統效能。

摘要(英)

In wireless cellular systems, cochannel interference is the limiting factor to system performance. Fixed wireless systems such as Local Multipoint Distribution Systems (LMDS) is no exception to this rule. In LMDS, because the downlink is usually higher-capacity and the narrow beam of subscribers’ antenna is an interference-limiting factor, the downlink interference is more serious. Consequently, assessment of cochannel interference on the downlink direction of LMDS is the subject of this thesis.
LMDS is operated at Ka band, and operation in the millimeter range imposes some restrictions. Attenuation due to rainfall can cause degradation of the quality of communication and restrict the path length of radio communication systems. The attenuation caused by transmission through vegetation is another restriction, and depolarization caused by foliage is taken into consideration, too. The excess path loss considered in this thesis is mainly come from the attenuation caused by rainfall and foliage.
In LMDS, the use of high-directivity antenna makes the influence of those interfering sources in the direction of the antenna’s main beam more serious than others, so we propose a new cellular architecture to try to reduce those sources. We only change the frequency allocation and polarization interleaving. In this situation, we don’t have to make extra investment in equipment and then we can get better system performance.

關鍵字(中)

★ 區域性點對多點傳輸系統
★ 同頻干擾

關鍵字(英)

★ cochannel interference
★ LMDS

論文目次

Contents......................................................I
List of Figures.............................................III
List of Tables................................................X
Chapter1 Introduction.........................................1
1.1Introduction of LMDS.................................1
1.2Motivation...........................................2
Chapter2 Cochannel Interference Calculation
.....................................................4
2.1 The well-known radio link formula.........................4
2.2 ITU-R rain attenuation prediction model...................6
2.3 Antenna pattern and some assumptions......................8
2.4 The statistical behavior of the transmitted signal.......11
Chapter3 Comparison Between the Typical and Proposed Cellular Architecture.................................................16
3.1 The typical and proposed cellular architecture...........16
3.2 The analysis of cochannel interference for the typical cellular architecture........................................20
3.3 The analysis of cochannel interference for the proposed cellular architecture........................................27
3.4 Computation results......................................40
Chapter4 Simulation Results..................................49
4.1 Simulations of outage probability at the worst point, m=2
.............................................................49
4.2 Simulations of outage probability at the worst point, m=4
.............................................................57
4.3 Simulations of outage probability at the worst point, m=6
.............................................................60
Chapter5 Conclusions.........................................63
References

參考文獻

[1] J. D. Parsons, The Mobile Radio Propagation Channel. John Wiley & Sons, 1991
[2] W.C.Y. Lee, Mobile Communication Engineering. McGraw-Hill, 1982
[3] Chang-Hoon Lee; Boo-Young Chung; Su-Hee Lee “Dynamic Modulation Scheme In Consideration of Cell Interference for LMDS” Communication Technology Proceedings,1998. ICCT'98.1998 International Conference on Volume: vol.2 , 1998 , Page(s): 5 pp. vol.2
[4] Farahvash. S.; Kavehrad. M. “Assessment of Cochannel Interference in Fixed Wireless Cellular Systems” Radio and Wireless Conference, 1999. RAWCON 99. 1999 IEEE, 1999, Page(s): 13-16
[5] Erceg, V.; Greenstein, L.J.; Tjandra, S.Y.; Parkoff, S.R.; Gupta, A.; Kulic, B.; Julius, A.A.; Bianchi, R. “An Empirically Based Path Loss Model for Wireless Channels in Suburban Environment” Selected Areas in Communications, IEEE Journal on Volume: 17 7 , July 1999 , Page(s): 1205 —1211
[6] Durgin, G.; Rappaport, T.S.; Hao Xu “Measurements and Models for Radio Path Loss and Penetration Loss In and Around Homes and Trees at 5.85 GHz” Communications, IEEE Transactions on Volume: 46 11 , Nov. 1998 , Page(s): 1484 —1496
[7] Hao Xu; Rappaport, T.S.; Boyle, R.J.; Schaffner, J.H. “Measurements and Models for 38-GHz Point-to-Multipoint Radiowave Propagation”
Selected Areas in Communications, IEEE Journal on
Volume: 18 3 , March 2000 , Page(s): 310 —321
[8] Ong, J.T.; Choo, Y.K.; Zhang, S.P. “Rain Rate and Attenuation Prediction Model for Singapore”Antennas and Propagation, 1995., Ninth International Conference on (Conf. Publ. No. 407) Volume: 2 , 1995 , Page(s): 81 -84 vol.2
[9] Louis J. Ippolito Jr. “Radio Propagation in Satellite Communications”
[10] Goddard, J.W.F.; Thurai, M. “RADAR-DERIVED PATH REDUCTION FACTORS FOR TERRESTRIAL SYSTEMS” Antennas and Propagation, Tenth International Conference on (Conf. Publ. No. 436) Volume: 2 , 1997 , Page(s): 218 -221 vol.2
[11] Kajiwara, A. “LMDS Radio Channel Obstructed by Foliage” Communications, 2000. ICC 2000. 2000 IEEE International Conference on Volume: 3 , 2000 , Page(s): 1583 -1587 vol.3
[12] Prasad, R.; Kegel, A. “Effects of Rician Faded and Log-Normal Shadowed Signals on Spectrum Efficiency in Microcellular Radio” Vehicular Technology, IEEE Transactions on Volume: 42 3 , Aug. 1993 , Page(s): 274 —281
[13] Roman, V.I. “Frequency Reuse and System Deployment in Local Multipoint Distribution Service” IEEE Personal Communications Volume: 6 6 , Dec. 1999 , Page(s): 20 —27
[14] Papazian, P.B.; Hufford, G.A.; Achatz, R.J.; Hoffman, R. “Study of the Local Multipoint Distribution Service Radio Channel” Broadcasting, IEEE Transactions on Volume: 43 2 , June 1997 , Page(s): 175 —184
[15] Gray, D.A. “Optimal Hub Deployment for 28 GHz LMDS Systems”Wireless Communications Conference, 1997., Proceedings , 1997 , Page(s): 18 —22
[16] Kee Chaing Chua; Ravi, K.V.; Bensaou, B.; Teck Chien Pek “Wireless Broadband Communications: Some Research Activities in Singapore” IEEE Communications Magazine Volume: 37 11 , Nov. 1999 , Page(s): 84 —90

指導教授

劉兆漢(Chao-Han Liu)

審核日期

2001-6-7

推文