472 Pages 105 B/W Illustrations
    by CRC Press

    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.

    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

    Biography

    Lal Chand Godara