By Enrico Forestieri
ISBN-10: 0387231323
ISBN-13: 9780387231327
ISBN-10: 0387231366
ISBN-13: 9780387231365
ISBN-10: 1280613394
ISBN-13: 9781280613395
Because the creation of optical communications, a greattechnological attempt has been dedicated to the exploitation of the massive bandwidth of optical fibers. Sta- ing from a number of Mb/s unmarried channel structures, a quick and relentless technological improvement has resulted in the particular 10 Gb/s in line with channel dense wavelength - imaginative and prescient multiplexing (DWDM) structures, with dozens of channels on a unmarried fiber. Transmitters and receivers at the moment are prepared for forty Gb/s, while thousands of channels could be at the same time amplified through optical amplifiers. however, regardless of this type of speed in technological development, optical c- munications are nonetheless in a primitive level if in comparison, for example, to radio communications: the generally unfold on-off keying (OOK) modulation layout is akin to the tough amplitude modulation (AM) layout, while the DWDM strategy is not anything greater than the optical model of the frequency - imaginative and prescient multiplexing (FDM) approach. furthermore, adaptive equalization, ch- nel coding or greatest chance detection are nonetheless thought of whatever “exotic” within the optical international. this is often quite often a result of beneficial char- teristics of the fiber optic channel (large bandwidth, low attenuation, channel balance, ...), which up to now allowed us to exploit extremely simple transmission and detection recommendations.
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Example text
Technol. , vol. 15, no. 1, pp. 102–104, Jan. 2003. [8] P. J. , vol. 37, no. 9, p. 582, Apr. 2001. [9] J. G. Proakis, Digital Communication, New York: McGraw-Hill, 1989. [10] L. , 1996. [11] E. R. Kretzmer, “Generalization of a technique for binary data communication,” IEEE Trans. Commun. , vol. COM-14, pp. 67–68, Feb. 1966. [12] P. Kabal and S. Pasupathy, “Partial response signaling,” IEEE Trans. , vol. COM23, no. 9, pp. 921–934, Sep. 1975. it Abstract: In this paper, we study the theoretical limits of optical communication channels affected by chromatic dispersion.
Is the frequency response of the receiver optical filter and is the one-side power spectral density of ASE noise before optical filtering, that in practical systems is set by the overall amount of noise introduced by the in-line optical amplifiers. Accordingly to these characteristics of the decision signal and using the theory reported in [9], the expression for the Bit-Error-Rate (BER) for an optical duobinary system can be analytically written as: 24 G. Bosco, A. Carena, V. Curri, and P. Poggiolini where is the Marcum Q function of order 2 and is the decision threshold, that must be optimized for every value of the ratio In any case, it can be shown that, independently of the value of minimization of BER corresponds to maximization of the first argument of the Marcum function.
84, no. 20, pp. 4729–4732, May 2000. [4] M. Aspelmeyer, H. R. Böhm, T. Gyatso, T. Jennewein, R. Kaltenbaek, M. Lindenthal, G. Molina-Terriza, A. Poppe, K. Resch, M. Taraba, R. Ursin, P. Walther, A. Zeilinger, “Long-distance free-space distribution of quantum entanglement,” Science, vol. 301, no. 5633, pp. 621–623, Aug. 2003. [5] W. T. Buttler, R. J. Hughes, P. G. Kwiat, S. K. Lamoreaux, G. G, Luther, G. L. Morgan, J. E. Nordholt, C. G. Peterson, and C. M. Simmons, “Practical free-space quantum key distribution over 1 km,” Phys.