Wideband Beamforming

Acknowledgements

1 Introduction

1.1 Array Signal Processing

1.2 Narrowband Beamforming

1.3 Wideband Beamforming

1.4 Wideband Beam Steering

1.5 Summary

2 Adaptive Wideband Beamforming

2.1 Reference Signal-Based Beamformer

2.2 Linearly Constrained Minimum Variance Beamforming

2.3 Constraints Design for LCMV Beamforming

2.4 Generalized Sidelobe Canceller

2.5 Other Minimum Variance Beamformers

2.6 Robust Adaptive Beamforming

2.7 Summary

3 Subband Adaptive Beamforming

3.1 Fundamentals of Filter Banks

3.2 Subband Adaptive Filtering

3.3 General Subband Adaptive Beamforming

3.4 Subband Adaptive GSC

3.5 Temporally/Spatially Subband-Selective Beamforming

3.6 Frequency-Domain Adaptive Beamforming

3.7 Transform-Domain Adaptive Beamforming

3.8 Summary

4 Design of Fixed Wideband Beamformers

4.1 Iterative Optimization

4.2 The Least Squares Approach

4.3 The Eigenfilter Approach

4.4 Summary

5 Frequency Invariant Beamforming

5.1 Introduction

5.2 Design Based on Multi-Dimensional Inverse Fourier Transform

5.3 Subband Design of Frequency Invariant Beamformers

5.4 Frequency Invariant Beamforming for Circular Arrays

5.5 Direct Optimization for Frequency Invariant Beamforming

5.6 Beamspace Adaptive Wideband Beamforming

5.7 Summary

6 Blind Wideband Beamforming

6.1 Blind Source Separation

6.2 Blind Wideband Beamforming

6.3 Blind Beamforming Based on Frequency Invariant Transformation

6.4 Summary

7 Wideband Beamforming with Sensor Delay-Lines

7.1 Sensor Delay-Line Based Structures

7.2 Frequency Invariant Beamforming

7.3 Adaptive Beamforming

7.4 Beamspace Adaptive Beamforming

7.5 Summary

8 Wideband Beamforming for Multipath Signals

8.1 The Wideband Multipath Problem

8.2 Approach Based on a Narrowband Beamformer

8.3 Approach Based on Blind Source Separation

8.4 MIMO System

8.5 Summary

Appendix A: Matrix Approximation

Appendix B: Differentiation with Respect to a Vector

Appendix C: Generic Algorithm

C.1 The Principle

C.2 Design Example in Section 3.5.2

Bibliography

Index