Nonlinear Digital Encoders for Data Communications

This book presents digital encoders for data communications. After an introduction on data communications and different sequences, the authors present the frey encoder as a digital filter followed by the trellis–coded and parallel turbo trellis–coded modulation schemes using nonlinear digital encoders. The book contains many numerical examples that complete the description of the analyzed schemes. Also, some performance simulation results are provided. Appendixes include demonstrations for the mathematical apparatus used throughout the book and some Matlab/Simulink source files used to run the simulations. Therefore, students can easily understand the concepts presented in the book and to simulate the schemes. INDICE: Chapter. 1 INTRODUCTION 1.1. Secure Communications Using Nonlinear Digital Encoders 1.2. Chaotic Spreading Sequences for Direct–Sequence Code Division Multiple Access 1.3. Sequence Synchronization in Discrete–Time Nonlinear Systems 1.4. Quasi–Chaotic Sequences for Data Communications. Benefits and Challenges 1.5. Presentation of the Book. Chapter. 2 PRESENTATION OF THE FREY NONLINEAR ENCODER AS A DIGITAL FILTER 2.1. The Mathematical Analysis of the Frey Encoder  2.2. The Properties of the Unsigned and 2’s Complement Signed Sample Operators 2.3. The Properties of the Left–Circulate Nonlinear Function Used in Frey Encoder Scheme 2.4. The Simulation of the Frey Sequence Generator Block in Simulink. Some Practical Considerations Chapter. 3 TRELLIS–CODED MODULATION SCHEMES USING NONLINEAR DIGITAL ENCODERS 3.1. The Presentation of the Frey Nonlinear Encoder as a Convolutional Encoder 3.2. Frey Encoder Trellis Design Optimization Methods for Pulse Amplitude Modulation – TCM Schemes 3.3. Optimum Nonlinear Encoders for Phase Shift Keying – TCM Schemes 3.4. Optimum Nonlinear Encoders for Quadrature Amplitude Modulation – TCM Schemes 3.5. Performance Analysis of TCM Data Communications Using Modified Nonlinear Digital Encoders. Simulation Results Chapter. 4 PARALLEL TURBO TRELLIS–CODED MODULATION SCHEMES USING NONLINEAR DIGITAL ENCODERS 4.1. The Presentation of Parallel Turbo Trellis–Coded Modulation Schemes 4.2. New Recursive and Systematic Convolutional Nonlinear Encoders for Parallel Turbo–TCM Schemes 4.3. Punctured Turbo–TCM Transmissions Using Recursive Systematic Convolutional Nonlinear Encoders 4.4. EXIT Charts Analysis for Turbo–TCM Schemes Using Nonlinear RSC Encoders 4.5. Performance Analysis of Turbo–TCM Data Communications Using Nonlinear Digital Encoders. Simulation Results Appendix A – DEMONSTRATIONS FOR THE PROPERTIES OF THE UNSIGNED AND SIGNED FINITE PRECISION OPERATORS

• ISBN: 978-1-84821-649-5
• Editorial: ISTE Ltd.
• Encuadernacion: Cartoné
• Páginas: 176
• Fecha Publicación: 04/06/2014
• Nº Volúmenes: 1
• Idioma: Inglés