Space/time/frequency methods in adaptive radar - New Jersey ...

More documents

Recommendations

Info

ChapterPage3.2.1 Non-Adaptive Beamformer 663.2.2 Optimum Signal Processing 663.2.3 Sample Matrix Inversion 673.2.4 Generalized Sidelobe Canceller (GSC) 673.2.5 Eigencanceler 693.2.6 Fixed Transforms 693.3 Target Cancellation 704 REDUCED-RANK PROCESSING 734.1 Reduced-Rank Processing with Known Covariance 734.2 Reduced-Rank Processing with Unknown Covariance 784.2.1 Analysis of Fixed Transforms 804.2.2 Analysis of Data Dependent Transforms 815 NUMERICAL RESULTS 845.1 Simulated Data 845.2 Mountain-Top Data 946 CONCLUSIONS 105APPENDIX A DISCRETE COSINE TRANSFORM 109APPENDIX B COLUMN STACKED FIXED TRANSFORMS 110APPENDIX C p COMPARISON 112REFERENCES 113
LIST OF FIGURESFigurePage1.1 A taxonomy of reduced-rank methods 61.2 Reduced-rank MVB 61.3 Reduced-rank GSC 62.1 Side-Looking SAR 102.2 SAR cross-range Doppler 112.3 Real Aperture Line Antenna 122.4 SAR data collection 152.5 Magnitude of the Fourier transform of a sine wave 162.6 Time-frequency description of a FSK signal 172.7 Computation of the short-time Fourier transform 192.8 STFT of a sine wave 202.9 Spectrogram of a multicomponent signal 212.10 Tradeoffs of various STFT windows 222.11 Gabor Transform of a sine wave 252.12 Gabor transform of a multicomponent signal 262.13 Time-Frequency resolution of the STFT and WT 292.14 Scalogram of a sine wave 312.15 Scalogram of a multicomponent signal 322.16 Regions of influence comparison of CWT and STFT 332.17 WVD transform of a sine wave 352.18 Example of WVD cross terms 372.19 WVD of a linear FM signal 392.20 STET of a linear FM signal 412.21 Gabor expansion of a linear FM signal 43ix
Page 1 and 2: Copyright Warning & RestrictionsThe
Page 3 and 4: ABSTRACTSPACE/TIME/FREQUENCY METHOD
Page 5 and 6: SPACE/TIME/FREQUENCY METHODS IN ADA
Page 7: APPROVAL PAGESpace/Time/Frequency M
Page 10 and 11: ACKNOWLEDGMENTI would like to begin
Page 14 and 15: FigurePage2.22 Scalogram of a linea
Page 16 and 17: CHAPTER 1INTRODUCTIONVarious space,
Page 18 and 19: 3the target. In this work we study
Page 20 and 21: 5support consists of a population o
Page 22 and 23: 7processing. This is explained by t
Page 24 and 25: 92.1 An Overview of Synthetic Apert
Page 26 and 27: 11Figure 2.2 SAR cross-range Dopple
Page 28 and 29: 13Through the expression for the on
Page 30 and 31: 15Illumination pattern onEarth's su
Page 32 and 33: 17Figure 2.6 Time-frequency descrip
Page 34 and 35: 19Figure 2.7 Computation of the sho
Page 36 and 37: 21Figure 2.9 Spectrogram of a multi
Page 38 and 39: 23where 9/ is the Hilbert transform
Page 40 and 41: Figure 2.11 Gabor Transform of a si
Page 42 and 43: 272.3.3 Continuous Wavelet Transfor
Page 44 and 45: 29Figure 2.13 Time-Frequency resolu
Page 46 and 47: Figure 2.14 Scalogram of a sine wav
Page 48 and 49: Figure 2.16 Regions of influence co
Page 50 and 51: Figure 2.17 WVD transform of a sine
Page 52 and 53: 37Figure 2.18 Example of WVD cross
Page 54 and 55: 39(a) Contour plot of the WVD of a
Page 56 and 57: 41(a) Contour plot of the STFT of a
Page 58 and 59: 43(a) Contour plot of the Gabor exp
Page 60 and 61: 452.5 Time-Frequency Analysis in No
Page 62 and 63:
47Consequently, when the slope S, i
Page 64 and 65:
49where:Doppler phase shift due to
Page 66 and 67:
51(a) Contour plotFigure 2.24 SAR i
Page 68 and 69:
53(a) Contour plotFigure 2.26 SAR i
Page 70 and 71:
55calculated in each case. In this
Page 72 and 73:
57(a) Moving target with synthetic
Page 74 and 75:
Figure 2.31 SAR with 2 moving targe
Page 76 and 77:
61Figure 3.1 Space-time adaptive ar
Page 78 and 79:
63Figure 3.3 Airborne radar basic g
Page 80 and 81:
subspace is formed using the remain
Page 82 and 83:
67where k is a gain constant and R
Page 84 and 85:
69The scalar beamformed noise estim
Page 86 and 87:
71are the desired signal, interfere
Page 88 and 89:
CHAPTER 4REDUCED-RANK PROCESSINGThe
Page 90 and 91:
75Figure 4.2 Reduced-rank GSCThis m
Page 92 and 93:
77This relation establishes an equi
Page 94 and 95:
79The conditioned SNR is a random v
Page 96 and 97:
81The performance of the GSC proces
Page 98 and 99:
83For large interference eigenvalue
Page 100 and 101:
85the steering vector s, and the ve
Page 102 and 103:
87(a) CSNR vs Rank order for other
Page 104 and 105:
89Figure 5.4 CSNR vs Rank order for
Page 106 and 107:
91Figure 5.6 Theoretical and simula
Page 108 and 109:
93Figure 5.8 CSNR vs CNRThe signal
Page 110 and 111:
950.80.80.6 0.6~(5'0.4IC!J0.40.20.2
Page 112 and 113:
97the spatial domain. The target is
Page 114 and 115:
99(a) Training outside the target r
Page 116 and 117:
101(a) Training around the target r
Page 118 and 119:
103Figure 5.15 Angle scan with the
Page 120 and 121:
CHAPTER 6CONCLUSIONSThis work has b
Page 122 and 123:
107also presented. The Sample Matri
Page 124 and 125:
APPENDIX ADISCRETE COSINE TRANSFORM
Page 126 and 127:
111This matrix is formed using the
Page 128 and 129:
REFERENCES1. Leon Cohen. Time-frequ
Page 130 and 131:
11523. Franz Hlawatsch and G. Faye
Page 132 and 133:
11750. Daniel F. Marshall. A two st
Page 134 and 135:
INDEXanalytic signal, 21array imper
show all

Space/time/frequency methods in adaptive radar - New Jersey ...

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?