跳到主要內容

臺灣博碩士論文加值系統

(44.201.97.0) 您好!臺灣時間:2024/04/16 09:26
字體大小: 字級放大   字級縮小   預設字形  
回查詢結果 :::

詳目顯示

: 
twitterline
研究生:謝政達
研究生(外文):Cheng-Ta Hsieh
論文名稱:在多路徑環境之分集結合接收器之二階統計特性
論文名稱(外文):Second-Order Statistics of Diversity Combining Reception in Multipath Communication
指導教授:林嘉慶林嘉慶引用關係
指導教授(外文):Jia-Chin Lin
學位類別:碩士
校院名稱:國立中央大學
系所名稱:通訊工程研究所
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:2008
畢業學年度:96
語文別:英文
論文頁數:68
中文關鍵詞:分集結合多路徑衰落相關性通道二階統計特性Karhunen-Loeve 展開式
外文關鍵詞:multipath fadingdiversity combiningcorrelated channelsecond-order statisticsKarhunen-Loeve expansion
相關次數:
  • 被引用被引用:0
  • 點閱點閱:214
  • 評分評分:
  • 下載下載:18
  • 收藏至我的研究室書目清單書目收藏:0
在無線通訊系統下,分集結合技術對於降低多路徑衰落的效應而言是不可或缺的,並且分集技術被期望為可以增加系統的效能。然而在相關性通道分支的情況下,分集技術的作用力會被降低。在空間分集技術的應用上,若天線沒有被間隔至少同調頻寬以上,通道之間產生相關性的現象是時常發生的。對於無線通訊系統效能的估測而言,二階統計特性是一個重要的指標。我們所提出的方法是利用Karhunen-Loeve 展開式,將原本具有相關性的隨機變數轉換為獨立的隨機變數,則這些獨立的隨機變數可以接著以分集結合技術處理,並期望觀察通道之統計特性。
For wireless communication systems, diversity combining techniques are indispensable for reducing the multipath fading effects, and it is expected to enhance the system performance. However, diversity techniques are diminished over correlated channel branches, which are commonly occurred in space diversity if the antennas are not separated at least coherence bandwidth. Second-order statistics are crucial performance criterion to evaluate the diversity effects of fading channels, whereas the performance in a correlated diversity system must be worse than that on independent multipath fading channels. A method which is to transform the correlated diversity branches into uncorrelated ones by the Karhunen-Loeve expansion, and then the transformed independent random variables are fed into the diversity combiner, and is expected to study the statistics of the fading channels.
Contents
Chapter 1 Introduction 1
Chapter 2 Review of Channel Model, Diversity
Combining and Second-Order Statistics 5
2.1 Channel Model 5
2.2 Diversity Combining 8
2.2.1 Diversity Combining Methods 9
2.2.2 Diversity Combining Techniques 10
2.3 First-Order Statistics 12
2.3.1 Channel Capacity 12
2.3.2 Probability of Error 14
2.3.3 Outage Probability 14
2.4 Second-Order Statistics 15
Chapter 3 Second-Order Statistics of Diversity
Combining over Fading Channels 18
3.1 LCR and AFD of Multipath Fading Channel 18
3.1.1 Rayleigh Case 18
3.1.2 Nakagami-m Case 20
3.2 LCR and AFD of Maximal-Ratio Combining in
Multipath Fading Channels 24
3.2.1 Rayleigh Case 24
3.2.2 Nakagami-m Case 27
3.3 LCR and AFD of Equal-Gain Combining in Multipath
Fading Channels 32
3.3.1 Rayleigh Case 32
3.3.2 Nakagami-m Case 36
3.4 LCR and AFD of Selection Combining in Multipath
Fading Channels 39
3.4.1 Rayleigh Case 39
3.4.2 Nakagami-m Case 42
Chapter 4 A Study of Correlated Fading Channels 48
4.1 Direct Deviation of Correlated Diversity System 48
4.2 LCR for MRC Receiver over Correlated Fading
Channels with Bounded Variance 51
4.3 Cholesky Decomposition for Correlated Diversity
System 57
4.4 Diagonalization of the Correlated Fading Channels
through Karhunen-Loeve Expansion 59
Chapter 5 Conclusion 65
Reference 66
[1]S. Haykin, Communication Systems, 4th edition, John Wiley & Sons, 2001.
[2]A. Goldsmith, Wireless Communications, Stanford University Press, 2003.
[3]M. K. Simon and M.-S. Alouini, Digital Communication over Fading Channels, 2nd edition, John Wiley & Sons, 2005.
[4]J. G. Proakis, Digital Communications, 4th edition, McGraw-Hill, 2001.
[5]D. G. Brennan, “Linear diversity combining techniques,” Proc. IRE, vol.47, pp. 1075-1101, Jun. 1959.
[6]M.-S. Alouini and A. J. Goldsmith, “Capacity of Rayleigh fading channels under different adaptive transmission and diversity-combining techniques,” IEEE Trans. Veh. Technol., vol. 48, no. 4, Jul. 1999.
[7]W. C. Jakes, Jr., Ed., Microwave Mobile Communications. New York: Wiley, 1974.
[8]M. D. Yacoub, J. E. Vargas B. and L. G. de R. Guedes, “On higher order statistics of the Nakagami- distribution,” IEEE Trans. Veh. Technol., vol. 48, pp. 790-794, May 1999.
[9]M. Nakagami, “The -distribution – a general formula of intensity distribution of rapid fading,” in Statistical Methods in Radio Wave Propagation, W. C. Hoffman, Ed. Elmsford, NY: Pergamon, 1960.
[10]M. D. Yacoub, C. R. C. M. da Silva and J. E. Vargas B., “Second-order statistics for equal gain and maximal ratio diversity-combining reception,” Electron. Lett., vol. 36, no. 4, pp. 382-384, Feb. 2000.
[11]H. Stark and J. W. Woods, Probability and Random Processes with Applications to Signal Processing, 3rd edition, Prentice Hall, 2002.
[12]A. L.-Garcia, Probability and Random Processes for Electrical Engineering, 2nd edition, Addison Wesley, 1994.
[13]M. D. Yacoub, C. R. C. M. da Silva and J. E. Vargas B., “Second-order statistics for diversity-combining techniques in Nakagami-fading channels,” IEEE Trans. Veh. Technol., vol. 50, no. 6, Nov. 2001.
[14]C.-D. Iskander and P. T. Mathiopoulos, “Analytical level crossing rates and average fad durations for diversity techniques in Nakagami fading channels,” IEEE Trans. Commun., vol. 50, no. 8, Aug. 2002.
[15]M. D. Yacoub, C. R. C. M. da Silva and J. E. Vargas B., “Level crossing rate and average fade duration for pure selection and threshold selection diversity-combining systems,” Intl. J. on Commmun. Systems, vol. 14, pp. 897-907, Dec. 2001.
[16]X. Dong and N. C. Beaulieu, “Average level crossing rate and average fade duration of selection diversity,” IEEE Commun. Lett., vol. 5, pp. 396-398, Oct. 2001.
[17]M. Z. Win and J. H. Winters, “Analysis of hybrid selection/maximal-ratio combining in Rayleigh fading,” IEEE Trans. Commun., vol. 47, pp. 1773-1776, Dec. 1999.
[18]L. Yang and M.-S. Alouini, “An exact analysis of the impact of fading correlation on the average level crossing rate and average outage duration of selection combining,” Proc. Veh. Technol. Conf. (VTC2003), vol. 1, pp. 241-245, Apr. 2003.
[19]K. Zhang, Z. Song and Y. L. Guan, “Cholesky decomposition model for correlated mrc diversity systems in Nakagami fading channels,” Proc. Veh. Technol. Conf. (VTC2002), vol. 3, pp. 1515-1519, Sep. 2002.
[20]J. C. S. S. Filho, G. Fraidenraich and M. D. Yacoub, “Exact crossing rates of dual diversity over unbalanced correlated Rayleigh channels,” IEEE Commun. Lett., vol. 10, no. 1, Jan. 2006.
[21]D. Li and V. K. Prabhu, “Average level crossing rates and average fade durations for maximal-ratio combining in correlated Nakagami channels,” Proc. Wireless Commun. Network Conf. (WCNC2004), vol. 1, pp. 339-344, Mar. 2004.
[22]Q. T. Zhang, “Maximal-ratio combining over Nakagami fading channels with an arbitrary branch covariance matrix,” IEEE Trans. Veh. Technol., vol. 48, no. 4, pp. 1141-1150, Jul. 1999.
[23]V. A. Aalo, “Performance of maximal-ratio diversity systems in a correlated Nakagami-fading environment,” IEEE Trans. Commun., vol. 43, no. 8, Aug. 1995.
[24]G. K. Karagiannidis, D. A. Zogas and S. A. Kotsopoulos, “On the multivariate Nakagami-m distribution with exponential correlation,” IEEE Trans. Commun., vol. 51, no. 8, Aug. 2003.
[25]R. K. Mallik, “The uniform correlation matrix and its application to diversity,” IEEE Trans. Wireless Commun., vol. 6, no. 5, May 2007.
[26]Q. T. Zhang, “Efficient generation of correlated Nakagami fading channels with arbitrary fading parameter,” Proc. Int. Conf. Commun. (ICC2002), no. 1, pp. 1358-1362, Apr. 2002.
[27]H. V. Poor, An Introduction to Signal Detection and Estimation, 2nd Ed., Springer, 1994.
[28]Q. T. Zhang, “A decomposition technique for efficient generation of correlated Nakagami fading channels,” IEEE Journ. Sel. Area. Commun., vol. 18, no. 11, Nov. 2000.
QRCODE
 
 
 
 
 
                                                                                                                                                                                                                                                                                                                                                                                                               
第一頁 上一頁 下一頁 最後一頁 top