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標題: Design and Analysis of Generalized Diversity Optical CDMA Systems
作者: Su, Je-Wei
關鍵字: 拷貝非同步
copy asynchronous
chip asynchronous
on-off keying
optical code-division multiple access
出版社: 通訊工程研究所
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Kwong, Prime Codes with Applications to CDMA Optical and Wireless Networks, Norwood, MA: Artech House, 2002. [7] V.J. Hernandez, W. Cong, J. Hu, C. Yang, N.K. Fontaine, R.P. Scott, Z. Ding, B.H Kolner, J.P Heritage and S.J.B. Yoo, “A 320-Gb/s capacity (32-user 10 Gb/s) SPECTS O-CDMA network testbed with enhanced spectral efficiency through forward error correction,” J. Lightw. Technol., vol. 25, no. 1, pp. 79–86, Jan. 2007. [8] C.-S. Bres, P.R. Prucnal, “Code-empowered lightwave networks,” J. Lightw. Technol., vol. 25, no. 10, pp. 2911-2921, May 2007. [9] F.R.K. Chung, J.A. Salehi, and V.K. Wei, “Optical orthogonal code: Design, analysis, and applications,” IEEE Trans. Inform. Theory, vol. 35, no 3, pp. 595–604, May 1989. [10] G.-C. Yang and T. Fuja, “Optical orthogonal codes with unequal auto- and cross-correlation constraints,” IEEE Trans. Info. Theory, vol. 41, no. 1, pp. 96?06, Jan. 1995. [11] G.-C. Yang, “Variable-weight optical orthogonal codes for CDMA network with multiple performance requirements,” IEEE Trans. Commun., vol. 44, no. 1, pp. 47–55, Jan. 1996. [12] G.-C. Yang and W.C. Kwong, “Performance comparison of multiwavelength CDMA and WDMA+CDMA for fiber-optic networks,” IEEE Trans. Commun., vol. 45, no. 11, pp. 1426–1434, Nov. 1997. [13] W.C. Kwong, G.-C. Yang, V. Baby, C.-S Bres, and P.R. Prucnal, “Multiple-wavelength optical orthogonal codes under prime-sequence permutations for optical CDMA,” IEEE Trans. Commun., vol. 53, no.1, pp. 117–123, Jan. 2005. [14] C.-Y. Chang, G.-C. Yang, C.-Y. Chang, and W.C. Kwong, “Study of a Diversity O-CDMA Scheme for Optical Wireless,” J. Lightw. Technol., vol. 30, no. 10, pp. 1549–1558, May 2012. [15] H. Ohtsuki, K. Tsukamoto, and S. Komaki, “BER improvement effect of optical delay inserion in ROF ubiquitous antenna architecture for wireless CDMA system,” J. Lightw. Technol., vol. 21, no. 12, pp. 3203–3208, Dec. 2003. [16] U.N. Griner and S. Arnon, “Multiuser diffuse indoor wireless infrared communication using equalized synchronous CDMA,” IEEE Trans. Commun, vol. 54, no. 9, pp. 1654–1662, Sep. 2006. [17] B.M. Ghaffari, M.D. Matinfar, and J.A. Salehi, “Wireless optical CDMA LAN: Digital implementation analysis,” IEEE J. Select. Areas. Commun., vol. 27, no. 9, pp. 1676–1686, Dec. 2009. [18] F. Alsaadi and J.M.H. Elmirghani, “Adaptive mobile spot diffusing angle diversity MC-CDMA optical wireless system in a real indoor environment,” IEEE Trans. Wireless Commun, vol. 8, no. 5, pp. 2187–2192, May 2009. [19] S.Z. Pinter and X.N. Fernando, “Estimation and equalization of fiber-wireless uplink for multiuser CDMA 4G networks,” IEEE Trans. Commun, vol. 58, no. 6, pp. 1803–1813, June 2010. [20] Z. Wang, Lei Xu, J. Chang, T. Wang, and P.R. Prucnal, “Secure optical transmission in a point-to-point link with encrypted CDMA codes,” IEEE Photo. Technol. Lett., vol. 22, no. 19, pp. 1410–1412, Dec. 2010. [21] S. Galli, R. Menendez, E. Narimanov, and P.R. Prucnal, “A novel method for increasing the spectral efficiency of optical CDMA,” IEEE Trans. Commun., vol. 56, no. 12, pp. 2133–2144, Dec. 2008. [22] C.-C. Hsu, G.-C. Yang, and W.C. Kwong, “Hard-limiting performance analysis of 2-D optical codes under the chip-asynchronous assumption,” IEEE Trans. Commun., vol. 56, no. 5, pp. 762–768, May 2008. [23] J.-J. Chen and G.-C. Yang, “CDMA fiber-optic systems with optical hard limiters,” J. Lightw. Technol., vol. 19, no. 7, pp. 950–958, July 2001. [24] S. Mashhadi and J.A. Salehi, “Code-division multiple-access techniques in optical fiber networks—Part III: Optical AND gate receiver structure with generalized optical orthogonal codes,” IEEE Trans. Commun., vol. 54, no. 7, p. 1349, July 2006. [25] Y. Shachaf, V. Polo, P. Kourtessis, J. Prat, and J.M. Senior, “Demonstration of coarse-fine grooming in coarse-WDM-routed PONs,” J. Opt. Commun. Network., vol. 1, no. 4, pp. 274–278, Sep. 2009. [26] W.C. Kwong, G.-C. 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摘要: 在最新提出的光纖多樣性分碼多工系統,為以達到更好的傳送品質,每一個使用者的每個訊號都傳送多次相同的拷貝,且每個碼在傳送前使用不同的平移,以達到每個拷貝之間的獨立性。但是由於在短碼長且位元同步的情況下,難以僅使用不同位移而達到獨立性,故在這篇論文,我們將結合位元非同步和拷貝之間的獨立性這種更接近現實生活中的情況去分析光纖多樣性分碼多工系統並且推導出一個廣義的公式,更精準的模型。最後,我們將介紹不同的位移顆粒度,用以改善傳送品質與拷貝之間的相關系。
In our recently proposed diversity O-CDMA scheme, every simultaneous user transmitted multiple copies of an optical code per data bit of one in order to achieve good code performance. To maintain performance, our analysis showed that copy independency wasessential, which was achieved by time-shifting these copies to different chip (or time-slot) positions per bit duration. However, complete copy independency is hard to achieve under the conventional chip-synchronous assumption, especially in short code length. In this paper, we combine the realistic effects of chip asynchronism and copy dependency in the analysis of such diversity O-CDMA systems and formulate a new, generalized, and more accurate performance model. Finally, the improvement in copy independency and code performance due to the introduction of finer granularity in time-shfits among the diversity copies are studied.
其他識別: U0005-2208201214493400
Appears in Collections:通訊工程研究所



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