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研究生:林柏仰
研究生(外文):Po-Yang Lin
論文名稱:使用多重時槽與位置編碼混成光分碼多工/分波多工系統之系統與效能分析
論文名稱(外文):Design and Performance Analysis of a Hybrid Multi-slot Optical CDMA/WDMA System with the Position Code
指導教授:張伯浩
指導教授(外文):Po-Hao Chang
學位類別:碩士
校院名稱:國立東華大學
系所名稱:電機工程學系
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:2014
畢業學年度:102
論文頁數:44
中文關鍵詞:光分碼多工多重時槽位置編碼
外文關鍵詞:Optical CDMAMulti-slotPosition Code
相關次數:
  • 被引用被引用:0
  • 點閱點閱:185
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  • 下載下載:6
  • 收藏至我的研究室書目清單書目收藏:0
近年來因為傳輸容量與頻寬的需求越來越大,一般的通訊方式已經無法滿足其需求。所以光纖通訊系統大量的頻寬與容量,變成未來的趨勢。它具備了:低損耗、高頻寬、高保密性、重量輕及體積小等優點。目前為止,光通訊已經發展出許多不同的傳輸方式。基於光的頻率非常高,如果能夠控制並利用光來做為通訊的載波,那通訊量將會比以往的傳統電波通訊提高許多。
較早發展成熟的分波多工進接系統(WDMA),是目前現實中應用最多的技術。但是WDMA的頻寬使用效率不佳(對於高頻寬的光纖系統來說),因此發展出光分碼多工進接系統(OCDMA),來解決這個缺點;但是因為OCDMA使用雷射光源的影響,進而限制了它的傳輸速率。因此,在這篇論文中,我們結合multi-slot與position code的編碼方式加以利用OCDMA系統中所浪費掉的時槽,來提升系統的效能,我們稱之為「多重時槽與位置編碼混成光分碼多工/分波多工系統」並將對其進行系統效能分析。新的系統架構在錯誤率不超過10−9 的時候,最差可以容納44個使用者,總傳輸量可以達到110Gbps。
Recently, conventional communication systems have been unable to meet the requirement of customers due to the increasing demand on bandwidth and transmission capacity. Optical communication systems, as a result, become the trend at present and in the future. They possess the advantages such as low loss, broad bandwidth, high security, light weight and small volume. Many transmission schemes have been developed for optical communication systems so far. The transmission capacity among all of them can be much higher than that of the wireless communication systems because of their intrinsic broad bandwidths.
Wavelength Division Multiple Access (WDMA) techniques are first developed and widely used in optical communication systems. Although they satisfy the demand for bandwidth, they suffer from the drawbacks of low spectrum efficiency, and Optical Code Division Multiple Access (OCDMA) techniques are therefore developed. Nevertheless, the transmission rate of OCDMA systems is constrained by the laser source they use.
In this thesis, an OCDMA system with the position code is combined with the multi-slot scheme so that the unused time slots can be utilized to enhance the system performance. It is then hybridized with the WDMA system to form a hybrid multi-slot OCDMA/WDMA system with the position code. The performance analysis shows that it may accommodate at least 44 users at an error probability of 10−9 , with the total data rate reaching 110Gbps.
Acknowledgement V
摘要 VI
Abstract VII
Contents IX
List of Figures and Tables X
Chapter 1 Introduction 1
Chapter 2 The Hybrid Optical CDMA/WDMA Communication System 3
2.1. OCDMA System Model 3
2.2 Hybrid OCDMA/WDMA System Model 8
Chapter 3 The Multi-slot Optical CDMA and Optical CDMA System with the Position code 11
3.1 Multi-slot OCDMA System 11
3.2 OCDMA System with Position Code 13
Chapter 4 Design and Performance Analysis of a Hybrid Multi-slot Optical CDMA/WDMA System with the Position code 17
4.1. System Model of OCDMA System 17
4.1.1. Introduction 17
4.1.2. Statistical Analysis 20
4.1.3 Performance Analysis 26
4.2 The Hybrid Multi-slot Optical CDMA/WDMA Communication System with the Position code 28
4.2.1 Introduction 28
4.2.2 Performance Analysis 30
4.3 BER Results 33
Chapter 5 Conclusion 41
Reference 43

[1] J. A. Salehi, A. M. Weiner, and J. P. Heritage, “Coherent Ultrashot Light Pulse Code-Division Multiple Access Communication System,” IEEE J. Lightw. Techcol., pp.478-491, March 1990.
[2] Po-Hao Chang, “Performance Analysis of Hybrid Code-Division Multiple-Access/Wavelength-Division Multiple-Access System Based on Spectral Encoding,” Ph.D Thesis, School of Electrical and Computer Engineering, Purdue University Indiana, USA, July, 2000.
[3] Hung-Shiang Chen, “Design and Performance Analysis of a Hybrid Multi-slot Optical CDMA/WDMA System,” Master Thesis, Institute of Electrical Engineering, National Dong-Hwa University, Taiwan, R.O.C., July, 2005.
[4] Yen-Hao Huang, “Design of a Hybrid Optical CDMA/WDMA System with the Position Code,” Master Thesis, Institute of Electrical Engineering National Dong-Hwa University, Taiwan, R.O.C., July , 2006.
[5] W. Huang, M. H. M. Nizam, I. Andonovic, and M. Tur, “Coherent Optical CDMA System Used for High-Capacity Optical Fiber Networks System Description, OTDMA Comparison, and OCDMA/WDMA Networking.” IEEE J. Lightw. Technol., vol. 18, no. 6, pp. 765-778, June 2000.

[6] A. H. Gnauck, J. M. Wiesenfeld, L. D. Garrett, et al., “16×20-Gb/s, 400-km WDM Transmission over NZDSF Using a Slope-Compensating Fiber-Grating Module,” IEEE Phot. Tech. Lett., pp. 437-439, April 2000.
[7] J. A. Salehi, “Code Division Multiple Access Techniques in Optical Fiber Networks-Part I:Fundamental Principles,” IEEE Trans. Commun., vol. 37, no. 8, pp. 824-833, Aug. 1989.
[8] J. A. Salehi and C. A. Brackett, “Code Division Multiple Access Techniques in Optical Fiber Networks-Part II:System Performance Analysis,” IEEE Trans. Commun., vol. 37, no. 8, pp. 834-842, Aug. 1989.
[9] A. M. Weiner, J. P. Heritage, and J. A. Salehi, “Frequency Domain Coding of Femtosecond Pulses for Spread-spectrum Communications,” Intl. Conf. Lasers Electro-optics, Baltimore, MD, Apr. 1987, pp. 294-296, postdeadline paper.
[10] A. M. Weiner, J. P. Heritage, and J. A. Salehi, “Encoding and Decoding of Femtosecond Pulses,” Opt. Lett., vol. 13, no. 4, pp. 300- 302, Apr. 1988.
[11] H. P. Sardesai, C.-C. Chang and A. M. Weiner, “A Femtosecond Code-Division Multiple-Access Communication System Test Bed,” IEEE J. Lightw. Technol., vol. 16, no. 11, November 1998.

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