Godara Smart Antennas

1. Auflage 2004
ISBN: 978-0-203-49677-0
Verlag: Taylor & Francis
Format: PDF
Kopierschutz: Adobe DRM (»Systemvoraussetzungen)

E-Book, Englisch, 472 Seiten

Reihe: Electrical Engineering & Applied Signal Processing Series

The use of smart antennas to increase mobile communications channels has re-ignited research and development in the field. Practicing engineers are eager to discover more about this subject, and need a comprehensive book that can provide a learning platform and prevent the loss of time spent on searches through journal literature.

Smart Antennas examines nearly all aspects of array signal processing and presents them in a logical manner. It delivers a detailed treatment of antenna array processing schemes, adaptive algorithms to adjust weighting, direction of arrival (DOA) estimation methods, diversity-combining methods that combat fading and reduce errors.

The book introduces the various processor structures suitable for the narrowband field, examining the behavior of both element space and beamspace processors. It then explores adaptive processing, focusing on the simple matrix inversion algorithm, constrained least mean squares (LMS), the neural network approach, and more. The text also describes smart antennas that are suitable for broadband signals, and presents analyses and techniques suitable for correlated fields in narrowband and broadband signals.

This volume supplements its content with extensive references, enabling you to further investigate smart antenna array schemes and application.

Zielgruppe

Students, researchers, and practitioners in communications, signal processing, wireless communications, biomedical signal processing, radar, sonar, antennas and propagation, microwaves, and electromagnetics

Autoren/Hrsg.

Godara, Lal Chand

Fachgebiete

• Technische Wissenschaften Sonstige Technologien | Angewandte Technik Signalverarbeitung, Bildverarbeitung, Scanning

Inhaltsverzeichnis

INTRODUCTION
Antenna Gain
Phased Array Antenna
Power Pattern
Beam Steering
Degree of Freedom
Optimal Antenna
Adaptive Antenna
Smart Antenna
Summary

NARROWBAND PROCESSING
Signal Model
Conventional Beamformer
Null Steering Beamformer
Optimal Beamformer
Optimization Using Reference Signal
Beam Space Processing
Effect of Errors
Notation and Abbreviations
References

ADAPTIVE PROCESSING
Sample Matrix Inversion Algorithm
Unconstrained Least Mean Squares Algorithm
Normalized Least Mean Squares Algorithm
Constrained Least Mean Squares Algorithm
Perturbation Algorithms
Structured Gradient Algorithm
Recursive LMS Algorithm
Improved Least Mean Squares Algorithm
Recursive Least Squares Algorithm.
Constant Modulus Algorithm
Conjugate Gradient Method
Neural Network Approach
Adaptive Beam Space Processing
Signal Sensitivity of Constrained LMS Algorithm
Implementation Issues
Notation and Abbreviations
References
Appendices

BROADBAND PROCESSING
Tapped-Delay Line Structure
Partitioned Realization
Derivative Constrained Processor.
Correlation Constrained Processor
Digital Beamforming
Frequency Domain Processing
Broadband Processing Using Discrete Fourier Transform Method
Performance
Notation and Abbreviations
References

CORRELATED FIELDS
Correlated Signal Model
Optimal Element Space Processor
Optimized Postbeamformer Interference Canceler Processor
Signal-to-Noise Ratio Performance
Methods to Alleviate Correlation Effects
Spatial Smoothing Method
Structured Beamforming Method
Correlated Broadband Sources
Notation and Abbreviations
References

DIRECTION-OF-ARRIVAL ESTIMATION METHODS
Spectral Estimation Methods
Minimum Variance Distortionless Response Estimator
Linear Prediction Method
Maximum Entropy Method
Maximum Likelihood Method
Eigenstructure Methods
MUSIC Algorithm
Minimum Norm Method
CLOSEST Method
ESPRIT Method
Weighted Subspace Fitting Method
Review of Other Methods
Preprocessing Techniques
Estimating Source Number
Performance Comparison
Sensitivity Analysis
References

SINGLE-ANTENNA SYSTEM IN FADING CHANNELS
Fading Channels
Channel Gain
Single-Antenna System
Notation and Abbreviations
References

DIVERSITY COMBINING
Selection Combiner
Switched Diversity Combiner
Equal Gain Combiner
Maximum Ratio Combiner
Optimal Combiner
Generalized Selection Combiner
Cascade Diversity Combiner
Macroscopic Diversity Combiner
Notation and Abbreviations
References