Radio direction finding and superresolution
Author(s)
Bibliographic Information
Radio direction finding and superresolution
（IEE electromagnetic waves series, 33）
Peregrinus on behalf of the Institution of Electrical Engineers, 1991
2nd ed
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Description and Table of Contents
Description
This is an enlarged and revised second edition of a book first published in 1978 and reprinted twice since then. The new edition includes updates to all the original chapters, plus two new chapters on developments in superresolution techniques and their application to direction-finding arrays.
Modern direction finders, capable of measuring elevation angles as well as azimuth angles on the components of multi-ray wavefields, have become powerful tools for research in ionospheric physics and HF radio propagation. The complexity of the problem of resolving closely-spaced rays requires the combined use of wide aperture antenna arrays, multichannel receiving systems and sophisticated digital processing techniques.
Published research papers over the last 12 years provide a rich source of information on the development of superresolution algorithms for use in radar, sonar, geophysics and spectral analysis, as well as radio direction finding. Dr Gething reviews the important methods and results, showing how some of the new techniques are related to the wavefront analysis methods described in the first edition. The text is illustrated with computer plots of model wavefields and contain important results on the loci of constant phase and amplitude, and on the statistical properties of bearing-error distributions for specified models. The collection and interpretation of ionospheric data for the purpose of mode identification, and the statistical theory of DF plotting algorithms, are also discussed.
Wavefront analysis and superresolution may be regarded as extensions to classical array theory. The basic principles are widely applicable and should therefore be of interest to research workers in radar, sonar, radioastronomy and adaptive array theory, as well as HF radio direction finding.
Table of Contents
Chapter 1: Introduction
Chapter 2: Ionospheric modes
Chapter 3: Wave-field models
Chapter 4: Zero-aperture bearings in two-ray wave-fields
Chapter 5: Directive array patterns
Chapter 6: Instrumental and site errors
Chapter 7: An introduction to resolution techniques
Chapter 8: Wave interference effects for circular arrays
Chapter 9: Wave interference effects for interferometers
Chapter 10: Wavefront analysis: the concept
Chapter 11: Wavefront analysis using imperfect data
Chapter 12: Superresolution algorithms
Chapter 13: Additional tools for superresolution
Chapter 14: Ray paths
Chapter 15: The effects of ionospheric tilts
Chapter 16: Bearing accuracy and DF plots
Chapter 17: Conclusions
Appendix 1: Circular WADF: parameters used in pattern calculations
Appendix 2: The theory of multiplicative processing
Appendix 3: Vertical array ofloops: parameters used in pattern calculations
Appendix 4: An example of masquerading
Appendix 5: Covariance matrix of sensor outputs
Appendix 6: Magneto-ionic deviations calculated with the Jones three-dimensional ray-tracing program
Appendix 7: Path integrals for parabolic layers
Appendix 8: The effective tilt of a parabolic layer
Appendix 9: Standard deviations of the best point estimate
by "Nielsen BookData"