Modern Hf Signal Detection And Direction Finding
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Modern HF Signal Detection and Direction Finding
Detailed descriptions of detection, direction-finding, and signal-estimation methods, using consistent formalisms and notation, emphasizing HF antenna array sensing applications. Adaptive antenna array technology encompasses many powerful interference suppression approaches that exploit spatial differences among signals reaching a radio receiver system. Today, worldwide propagation phenomenology occurring in the High Frequency (HF) radio regime has made such interference common. In this book, Jay Sklar, a longtime researcher at MIT Lincoln Laboratory, presents detailed descriptions of detection, direction-finding, and signal-estimation methods applicable at HF, using consistent formalisms and notation. Modern electronic system technology has made many of these techniques affordable and practical; the goal of the book is to offer practicing engineers a comprehensive and self-contained reference that will encourage more widespread application of these approaches. The book is based on the author's thirty years of managing MIT Lincoln Laboratory work on the application of adaptive antenna array technologies to the sensing of HF communication signals. After an overview of HF propagation phenomenology, communication signal formats, and HF receiver architectural approaches, Sklar describes the HF propagation environment in more detail; introduces important modulation approaches and signaling protocols used at HF; discusses HF receiver system architectural features; and addresses signal processor architecture and its implementation. He then presents the technical foundation for the book: the vector model for a signal received at an adaptive array antenna. He follows this with discussions of actual signal processing techniques for detection and direction finding, including specific direction-finding algorithms; geolocation techniques; and signal estimation.
Modern HF Signal Detection and Direction Finding
Detailed descriptions of detection, direction-finding, and signal-estimation methods, using consistent formalisms and notation, emphasizing HF antenna array sensing applications. Adaptive antenna array technology encompasses many powerful interference suppression approaches that exploit spatial differences among signals reaching a radio receiver system. Today, worldwide propagation phenomenology occurring in the High Frequency (HF) radio regime has made such interference common. In this book, Jay Sklar, a longtime researcher at MIT Lincoln Laboratory, presents detailed descriptions of detection, direction-finding, and signal-estimation methods applicable at HF, using consistent formalisms and notation. Modern electronic system technology has made many of these techniques affordable and practical; the goal of the book is to offer practicing engineers a comprehensive and self-contained reference that will encourage more widespread application of these approaches. The book is based on the author's thirty years of managing MIT Lincoln Laboratory work on the application of adaptive antenna array technologies to the sensing of HF communication signals. After an overview of HF propagation phenomenology, communication signal formats, and HF receiver architectural approaches, Sklar describes the HF propagation environment in more detail; introduces important modulation approaches and signaling protocols used at HF; discusses HF receiver system architectural features; and addresses signal processor architecture and its implementation. He then presents the technical foundation for the book: the vector model for a signal received at an adaptive array antenna. He follows this with discussions of actual signal processing techniques for detection and direction finding, including specific direction-finding algorithms; geolocation techniques; and signal estimation.
Perspectives in Antenna Technology
The definitive volume of recent innovations in antenna technology developed for a wide variety of system applications at MIT Lincoln Laboratory. Antenna technology plays a key role in enabling next-generation sensing and communications for ground-based, airborne, and spaceborne systems across a wide spectrum of frequencies and applications. Advances in RF microelectronics, commercial high-volume manufacturing and packaging, high-fidelity modeling and simulation tools, and affordable high-speed digital signal processing offer new options for next-generation antenna systems. Perspectives in Antenna Technology, by Jeffrey S. Herd, Alan J. Fenn, and M. David Conway, describes a variety of antenna research and development projects from MIT Lincoln Laboratory over the past fifteen years. In addition to highlighting current systems applications for the new antenna technologies, the book provides a modern perspective on the evolution of antenna technology at MIT Lincoln Laboratory. The contributors to this book are all from MIT Lincoln Laboratory. The developments covered include those aimed at reducing the cost of phased array antennas by leveraging high-volume printed circuit board manufacturing and highly integrated packaging techniques; novel solutions to enable ultra-lightweight deployable antennas for space and airborne applications; vector sensor arrays; two unique imaging radar systems, a video-rate microwave imaging system for person-borne concealed threat detection and a system capable of ultrawideband imaging of satellites; simultaneous transmit and receive (STAR) antennas; a variety of novel wideband array antennas, including dual-polarized stepped-notch arrays and coupled dipole arrays; and several types of custom millimeter wave (mmWave) antennas.