[内容简介]
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.
[目录]
List of Abbreviations
List of Symbols
Introduction
Book Structure
Multicarrier Transmission
Orthogonal Multicarrier Signals
Orthogonal Frequency Division Multiplexing
Transmitter Structure
Receiver Structure
Other Multicarrier Schemes
Discrete Multitone
Bandpass Approach
Baseband Approach
Orthogonal Frequency Division Multiple Access
Downlink Transmission
Uplink Transmission
Multicarrier Code Division Multiple Access
Downlink Transmission
Uplink Transmission
Software Radio
Characterization of the Transmitted Signals
Spectral Characterization
Other Multicarrier Schemes
Time Domain Characterization
Other Multicarrier Schemes
Envelope Fluctuations
Nonlinear Distortion of Gaussian Signals
Memoryless Nonlinearities Characterization
Memoryless Nonlinear Characteristics
Cartesian Memoryless Nonlinear Characteristics
Polar Memoryless Nonlinear Characteristics
Memoryless Nonlinear Distortion of Gaussian Signals
Cartesian Memoryless Nonlinearities with Gaussian Inputs
Polar 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
Generalization
Analytical Characterization of Nonlinearly Distorted Multicarrier Signals using the Gaussian Approximation
Accuracy of the Gaussian Approximation
Discussion
Nonlinear Effects in Specific Multicarrier Systems
Clipping and Filtering Techniques
Transmitter Structure
Signal Characterization Along the Signal Processing Chain
Numerical Results
Analytical BER Performance
Performance Results
Complementary Remarks
Impact of Quantization Effects on Multicarrier Signals
Quantization Effects on Multicarrier Modulated Signals
Statistical Characterization of the Transmitted and Received Signals
Performance Results
Impact of Quantization E_ects on Software Radio Signals
ADC Quantization in Software Radio Architectures
Statistical Characterization of the Quantized Signals
Performance Results
Loading 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 Transmission
Discussion
Output Autocorrelation for Polar Memoryless Nonlinearities with Gaussian Inputs
Analytical Results for Specific Nonlinearities
Cartesian Memoryless Nonlinearities
Polar Memoryless Nonlinearities
Exact Characterization of a Polar Memoryless Nonlinearity with Characteristic g(R) = R5
Generalization
Approximated Symbol Error Rate for Cross QAM Constellations
References