روش مکان‌یابی غیرفعال مبتنی بر اندازه‌گیری اختلاف فاز

Passive Location Method Based on Phase Difference Measurement presents groundbreaking information for developing passive positioning technologies. The author has put forward a series of innovative solutions from the perspective of engineering application theory with the aim of giving a basic understanding of the application of unambiguous phase difference localization techniques for long-range passive detection. On the basis of the existing linear solution of the double basis path difference positioning equation and the analysis of its intrinsic properties, this book starts from the study of the phase difference measurement method of the phase difference change rate, puts forward the concept of the differential function of the path difference per unit wavelength length and also discovers its jump law. It provides a possible way to solve the problem of unambiguous phase difference measurement. These results are of great significance to the development of passive localization techniques based on unambiguous phase difference measurement. Key Features: - Sequentially presents theoretical frameworks to build the readers knowledge for better understanding the topics - Presents a variety of unique method for solving kinematic positioning parameters and Doppler signal parameters by using unambiguous phase difference measurement. - Presents a variety of direction-finding and ranging methods based on short baseline array and using unambiguous phase difference measurement technology, and exhibits the method of constructing long baseline two-station direction finding and ranging with short baseline array - Presents a variety of two-station passive positioning methods based on angle measurement which are beneficial to improve the positioning accuracy on the basis of studying the relationship between the phase difference and angle - Presents the means to convert Doppler detection to the non-fuzzy phase difference measure, for the localization problem in which it is difficult to use the phase difference localization equation directly, since the accuracy of the phase difference measurement is better than that of the Doppler frequency difference - Presents a variety of new positioning methods and several novel concepts while demonstrating the theoretical exploration of passive location problem based on unambiguous phase difference measurement This reference is a resource for scholars, engineers and technicians involved in radio positioning research and the improvement of radar, satellite navigation systems, unmanned systems and Internet of Things infrastructure. Passive Location Method Based on Phase Difference Measurement presents groundbreaking information about passive location methods used for developing positioning technologies. The author has put forward a series of innovative solutions from the perspective of applied theory in distance finding with the aim of improving our understanding of systems designed to detect moving objects in small spaces. The book starts with a theoretical study of the relationship between phase frequency functions on a two-dimensional plane. This is followed by explanations of detection methods using unambiguous phase parameters. The analysis demonstrates how difference change rates work with parameters for measuring phase difference and wavelength integers. In addition, there is a jump phenomenon between the difference term of phase difference and the difference value of the wavelength integer, that can be used to mathematically compute the distance between these parameters respectively. The results in this work have interesting implications for location measurement with a lack of phase ambiguity. The methods show a framework for converting signal processing models for passive location detection systems for unambiguous phase difference calculations. It also provides an effective solution to the problem of how to eliminate the influence of the measurement error of the wavelength integer difference on the positioning accuracy. Key Features: - Sequentially presents theoretical frameworks to build the reader’s knowledge for better understanding the topics - Presents a unique method for measuring the motion parameters on a moving platform based on unambiguous phase difference measurement parameters. - Summarizes phase difference location methods, including direction finding and ranging - Discusses passive methods of phase difference localization by means of virtual observation - Includes references for further reading This reference is a resource for scholars, engineers and technicians involved in radio positioning research and the improvement of radar, satellite navigation systems, unmanned systems and Internet of Things infrastructure. Cover Title Copyright End User License Agreement Contents Preface The General Solution of the Phase DifferencePositioning Equation Internal Characteristics of Double-base Array Path Difference and Its Difference Function Unambiguous Phase Difference Measurement of Positioning Parameters Unambiguous Phase Difference Direction FindingBased on Short Baseline Array Unambiguous Phase Difference Ranging Based onShort Baseline Array Passive Detection Method Based on AngleMeasurement Passive Detection Method Based on PhasefrequencyConversion Passive Positioning Method, Based on CombinedMeasurement, of Fixed Two Stations Subject Index