|
|
1 | (1) |
|
|
1 | (1) |
|
1.2 Practical Applications |
|
|
2 | (1) |
|
|
3 | (4) |
|
|
4 | (3) |
|
2 Acoustic Environment, Source Models and Sensor Arrays Theory |
|
|
7 | (20) |
|
|
7 | (1) |
|
2.2 Environment and Channel Modelling |
|
|
8 | (2) |
|
|
10 | (5) |
|
2.3.1 Distributed and Point Source |
|
|
10 | (1) |
|
2.3.2 Nearfield and Farfield Source |
|
|
11 | (4) |
|
|
15 | (4) |
|
|
15 | (4) |
|
|
19 | (1) |
|
2.5 Spiral Arm Array Geometry |
|
|
19 | (6) |
|
|
21 | (2) |
|
|
23 | (2) |
|
|
25 | (2) |
|
|
25 | (2) |
|
3 Broadband Beamformer Design |
|
|
27 | (26) |
|
|
27 | (1) |
|
|
28 | (5) |
|
3.2.1 Weight-and-Sum Beamformer |
|
|
28 | (3) |
|
3.2.2 Filter-and-Sum Beamformer |
|
|
31 | (2) |
|
|
33 | (5) |
|
3.3.1 Weighted LS Formulation |
|
|
33 | (3) |
|
3.3.2 Weighted TLS Formulation |
|
|
36 | (2) |
|
3.4 Mixed Nearfield-Farfield Design Formulation |
|
|
38 | (1) |
|
|
39 | (1) |
|
3.6 Design Examples and Evaluation |
|
|
40 | (10) |
|
|
50 | (3) |
|
|
50 | (3) |
|
4 Steerable Broadband Beamformer Design |
|
|
53 | (24) |
|
|
53 | (1) |
|
|
54 | (3) |
|
|
57 | (4) |
|
4.3.1 Weighted LS Formulation |
|
|
57 | (3) |
|
4.3.2 Weighted TLS Formulation |
|
|
60 | (1) |
|
4.4 Mixed Nearfield-Farfield Design Formulation |
|
|
61 | (1) |
|
|
62 | (3) |
|
|
62 | (2) |
|
4.5.2 Normalisation of Steering Function |
|
|
64 | (1) |
|
|
65 | (1) |
|
4.7 Design Examples and Evaluation |
|
|
65 | (11) |
|
|
76 | (1) |
|
|
76 | (1) |
|
|
77 | (26) |
|
|
77 | (2) |
|
5.2 Conventional White Noise Gain Constraint |
|
|
79 | (1) |
|
5.3 Stochastic Error Model |
|
|
80 | (5) |
|
5.3.1 Multiplicative Error |
|
|
80 | (3) |
|
|
83 | (2) |
|
5.3.3 Multiplicative and Additive Error |
|
|
85 | (1) |
|
5.4 Robust Formulation Using Stochastic Error Model |
|
|
85 | (2) |
|
5.4.1 Weighted LS Formulation |
|
|
85 | (1) |
|
5.4.2 Weighted TLS Formulation |
|
|
86 | (1) |
|
|
87 | (1) |
|
5.6 Design Examples and Evaluation |
|
|
87 | (10) |
|
5.6.1 Design Specifications |
|
|
87 | (1) |
|
5.6.2 Array Gain and Sensitivity |
|
|
88 | (1) |
|
5.6.3 Perturbation in Sensor Characteristics |
|
|
89 | (2) |
|
5.6.4 Perturbation in Sensor Positions |
|
|
91 | (4) |
|
5.6.5 Perturbation Due to Local Scattering |
|
|
95 | (2) |
|
|
97 | (6) |
|
|
100 | (3) |
|
6 Conclusions and Future Work |
|
|
103 | (4) |
|
|
103 | (1) |
|
|
104 | (2) |
|
|
106 | (1) |
|
|
106 | (1) |
Appendix A Closed Form Integration for Fixed Beamformer Design |
|
107 | (4) |
Appendix B Closed Form Integrations for Steerable Beamformer Design |
|
111 | |