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This comprehensive text narrates the advancement of Digital Communication Systems with the advent of various communication techniques. It explains the technology involved in digital systems by analyzing the various theories, methodologies and protocols. The book gives an in-depth analysis of advanced digital communication systems and in so doing it focusses on topics such as: * Fundamentals of digital communication systems * Need for synchronization and basic synchronization techniques * Significance of digital clocks in digital communication * Spread spectrum techniques and their performance in the field of digital communication * Realistic system employing various types of multiple access techniques for a satellite transponder * Study of cryptography and popular cipher systems * Elements of satellite communication system and its design. Printed Pages: 566. Buchnummer des Verkäufers 11930
Titel: Advanced Digital Communication Systems
Verlag: PHI Learning
Auflage: First edition.
Buchbeschreibung Springer, 1994. Bibliotheksexemplar mit Vignetten auf Deckel /Rücken und Titelblatt, Text sauber, library copy Sprache: Englisch (XV, 564 S.), 24 cm, kartoniert. Artikel-Nr. 29950
Buchbeschreibung Shaker Verlag Mrz 2014, 2014. Buch. Buchzustand: Neu. 21x14.8x cm. Neuware - Digital backward propagation (DBP) is an effective way to enable the simultaneous compensation of both linear and nonlinear fiber impairments, which cause severe impacts on present optical transmission systems using high spectral-efficient techniques for the growing capacity demand. The principle of DBP is to apply split-step Fourier method (SSFM) to solve the inverse nonlinear Schrödinger equation (NLSE) onto the received distorted complex signal of full information based on coherent detection with a digital signal processing (DSP) module. However, DBP performance must be traded off for computational complexity. Requiring many calculation steps for high accuracy, the conventional SSFM algorithm is inefficient and thus not feasible especially in real-time hardware implementations. This work focuses on DBP performance and the possibilities to enhance hardware efficiency for systems using DBP. In addition to the conventional DBP algorithm, logarithmic DBP and correlated DBP methods are introduced. The performance of different DBP algorithms is compared and the influence of system parameters is analyzed. In this thesis, advanced modulation formats of current optical communication systems, such as differential phase shift keying (DPSK) and higherorder quadrature amplitude modulation (QAM), are chosen for the numerical investigations. The impact of fiber nonlinear effect without DBP compensation is presented for various bit rates, fiber types and link designs. Especially the performance degradation caused by the Gordon-Mollenauer effect in DPSK-systems is discussed. 180 pp. Englisch, Deutsch. Artikel-Nr. 9783844025897