1st Edition
Neuro-Fuzzy Equalizers for Mobile Cellular Channels
Equalizers are present in all forms of communication systems. Neuro-Fuzzy Equalizers for Mobile Cellular Channels details the modeling of a mobile broadband communication channel and designing of a neuro-fuzzy adaptive equalizer for it. This book focuses on the concept of the simulation of wireless channel equalizers using the adaptive-network-based fuzzy inference system (ANFIS). The book highlights a study of currently existing equalizers for wireless channels. It discusses several techniques for channel equalization, including the type-2 fuzzy adaptive filter (type-2 FAF), compensatory neuro-fuzzy filter (CNFF), and radial basis function (RBF) neural network.
Neuro-Fuzzy Equalizers for Mobile Cellular Channels
starts with a brief introduction to channel equalizers, and the nature of mobile cellular channels with regard to the frequency reuse and the resulting CCI. It considers the many channel models available for mobile cellular channels, establishes the mobile indoor channel as a Rayleigh fading channel, presents the channel equalization problem, and focuses on various equalizers for mobile cellular channels. The book discusses conventional equalizers like LE and DFE using a simple LMS algorithm and transversal equalizers. It also covers channel equalization with neural networks and fuzzy logic, and classifies various equalizers.This being a fairly new branch of study, the book considers in detail the concept of fuzzy logic controllers in noise cancellation problems and provides the fundamental concepts of neuro-fuzzy. The final chapter offers a recap and explores venues for further research. This book also establishes a common mathematical framework of the equalizers using the RBF model and develops a mathematical model for ultra-wide band (UWB) channels using the channel co-variance matrix (CCM).
- Introduces the novel concept of the application of adaptive-network-based fuzzy inference system (ANFIS) in the design of wireless channel equalizers
- Provides model ultra-wide band (UWB) channels using channel co-variance matrix
- Offers a formulation of a unified radial basis function (RBF) framework for ANFIS-based and fuzzy adaptive filter (FAF) Type II, as well as compensatory neuro-fuzzy equalizers
- Includes extensive use of MATLAB® as the simulation tool in all the above cases
Introduction
Introduction
The Need for Equalizers
Review of Contemporary Literature
The Major Contributions of the Book
Further Reading
Overview of Mobile Channels and Equalizers
Introduction
The Mobile Cellular Communication System
Fading Characteristics of Mobile Channels
Channel Models
Classification of Equalizers
Conclusion
Further Reading
Neuro-Fuzzy Equalizers for Cellular Channels
Introduction to Neuro-Fuzzy Systems
Type-2 Fuzzy Adaptive Filter
Adaptation of the Type-2 FAF for the Indoor Environment
Conclusion
Further Reading
The ANFIS-Based Channel Equalizer
Introduction
Methods of Channel Equalizer Analysis and Design
Mobile Channel Equalizer Based on ANFIS
Equalization of UWB Systems Using ANFIS
Conclusion
Further Reading
The Compensatory Neuro-Fuzzy Filter (CNFF)
Introduction
CNFF
The Structure of CNFFs
Conclusion
Further Reading
A Radial Basis Function Framework
Introduction
RBF Neural Networks
Type- FAF Equalizer
CNFF
ANFIS Based Channel Equalizer
Conclusion
Further Reading
A Modular Approach to Channel Equalization
Introduction
Nonlinear Channel Models
Nonlinear Channel Equalizers
A Modular Approach for Non-Linear Channel Equalizers
Simulation Results
Conclusion
Further Reading
OFDM and Spatial Diversity
Introduction
CDMA
COFDM
Conclusion
Further Reading
Conclusion
Introduction
The Major Achievements of the Work
Confinements of the Work
Scope for Further Research
Further Reading
Index
Biography
K.C. Raveendranathan holds a bachelor’s degree in electronics and communication engineering, masters in electrical communication engineering, and Ph.D. in computer science and engineering. He worked in BEL Bangalore prior to joining College of Engineering Trivandrum, as a faculty. Now he is working as principal and professor in LBS Institute of Technology for Women Poojappura, Trivandrum, Kerala, India. Raveendranathan has over 25 years of teaching experience in various reputed government engineering colleges in Kerala. He has published over 12 papers in national/international conferences and journals and guided over a dozen UG and PG theses. He has also authored three textbooks. He is a life member of ISTE, Life Fellow of IETE, Life Fellow and Chartered Engineer of IE (India), and a senior member of IEEE.