Analytical Evaluation of Nonlinear Distortion Effects on Multicarrier Signals

This book examines the nonlinear distortion of multicarrier signals. First, it outlines the basic principles of multicarrier transmission and multicarrier-based systems. Next, it presents a unified approach to well-known analytical results on memoryless nonlinearities that takes advantage of the Gaussian behavior of multicarrier signals. This is followed by a theoretical study of the accuracy of the Gaussian approximation usually used for multicarrier signals. Finally, a study of the performance of some multicarrier-based systems in the presence of different types of nonlinear devices is presented.

Due to their ability to support reliable high quality of service as well as spectral and power efficiency, multicarrier modulation systems have found increasing use in modern communications services. However, one of the main drawbacks of these systems is their vulnerability to nonlinear distortion effects. Analytical Evaluation of Nonlinear Distortion Effects on Multicarrier Signals details a unified approach to well-known analytical results on memoryless nonlinearities that takes advantage of the Gaussian behavior of multicarrier signals.Sharing new insights into the behavior of nonlinearly distorted multicarrier signals, the book begins with a review of the fundamental principles of multicarrier transmission and multicarrier-based systems. Next, it covers well-known results on nonlinear distortion of Gaussian signals and examines the accuracy of the use of Gaussian approximation for evaluating nonlinear effects. It also considers the performance of various multicarrier-based systems in the presence of different types of nonlinear devices. Describes general clipping and filtering techniques to reduce the envelope fluctuations of multicarrier signals Analyzes quantization effects caused by the numerical accuracy required in the DFT computations Discusses quantization requirements of analog-to-digital converters Redefines loading techniques to take into account nonlinear distortion issues on adaptive multicarrier systems Examines the impact of nonlinear signal processing techniques for reducing the envelope fluctuations of OFDMA signals Presents performance results for all the discussed applications The book covers the essential principles of multicarrier modulations, including OFDM modulations and other multicarrier schemes. It describes multicarrier modulation systems that will be used in next-generation communications systems and also provides new insight into the behavior of nonlinearly distorted multicarrier signals.Illustrating the application of the nonlinear distortion analysis techniques presented, the book provides you with a wide range of analytical tools to assess the effects of nonlinearities on the performance of multicarrier-based schemes.

List of AbbreviationsList of SymbolsIntroductionBook StructureMulticarrier TransmissionOrthogonal Multicarrier SignalsOrthogonal Frequency Division Multiplexing Transmitter Structure Receiver StructureOther Multicarrier Schemes Discrete Multitone Bandpass Approach Baseband Approach Orthogonal Frequency Division Multiple Access Downlink Transmission Uplink Transmission Multicarrier Code Division Multiple Access Downlink TransmissionUplink Transmission Software RadioCharacterization of the Transmitted Signals Spectral Characterization Other Multicarrier Schemes Time Domain Characterization Other Multicarrier Schemes Envelope Fluctuations Nonlinear Distortion of Gaussian SignalsMemoryless Nonlinearities Characterization Memoryless Nonlinear Characteristics Cartesian Memoryless Nonlinear Characteristics Polar Memoryless Nonlinear CharacteristicsMemoryless Nonlinear Distortion of Gaussian Signals Cartesian Memoryless Nonlinearities with Gaussian InputsPolar Memoryless Nonlinearities with Gaussian Inputs Accuracy of the Gaussian Approximation for the Evaluation of Nonlinear Effects Exact Characterization of Nonlinearly Distorted Multicarrier Signals Nonlinear Characteristic of Order 3 Nonlinear Characteristic of Order 5 GeneralizationAnalytical Characterization of Nonlinearly Distorted Multicarrier Signals using the Gaussian ApproximationAccuracy of the Gaussian ApproximationDiscussionNonlinear Effects in Specific Multicarrier SystemsClipping and Filtering Techniques Transmitter Structure Signal Characterization Along the Signal Processing Chain Numerical Results Analytical BER Performance Performance Results Complementary RemarksImpact of Quantization Effects on Multicarrier Signals Quantization Effects on Multicarrier Modulated Signals Statistical Characterization of the Transmitted and Received Signals Performance ResultsImpact of Quantization E_ects on Software Radio Signals ADC Quantization in Software Radio Architectures Statistical Characterization of the Quantized Signals Performance ResultsLoading Techniques with Nonlinear Distortion Effects Nonlinear Signal Processing for Multicarrier Signals Loading Techniques Single Carrier Analysis Multicarrier Analysis Waterfilling Leke-Cioffi Algorithm Loading with Nonlinear Distortion Effects Performance Results Impact of Nonlinear Signal Processing on OFDMA Signals Nonlinear Effects on OFDMA Signals Statistical Characterization of the Transmitted Signals Signal-to-Interference Ratio Levels on the Received Signals Multiple Users Single User Performance Results Downlink Transmission Uplink TransmissionDiscussionOutput Autocorrelation for Polar Memoryless Nonlinearities with Gaussian Inputs Analytical Results for Specific NonlinearitiesCartesian Memoryless NonlinearitiesPolar Memoryless NonlinearitiesExact Characterization of a Polar Memoryless Nonlinearity with Characteristic g(R) = R5GeneralizationApproximated Symbol Error Rate for Cross QAM Constellations References