A novel density-based geolocation algorithm for a noncooperative radio emitter using power difference of arrival

Shanzeng Guo; Brad Jackson; Sichun Wang; Robert Inkol; William Arnold

doi:10.1117/12.883306

24 May 2011 A novel density-based geolocation algorithm for a noncooperative radio emitter using power difference of arrival

Shanzeng Guo, Brad Jackson, Sichun Wang, Robert Inkol, William Arnold

Author Affiliations +

Proceedings Volume 8061, Wireless Sensing, Localization, and Processing VI; 80610E (2011) https://doi.org/10.1117/12.883306
Event: SPIE Defense, Security, and Sensing, 2011, Orlando, Florida, United States

Abstract

This paper presents a novel density-based geolocation algorithm for locating a non-cooperative radio emitter using measurements of the power difference of arrival (PDOA), also known as received signal strength difference (RSSD). Consider a 2D space in a Cartesian coordinate system with N sensors and one stationary radio emitter and assume that the distance from a sensor to the radio emitter is the hypotenuse of a right triangle. For any combination of three sensors, there exists a system of three Pythagorean equations that can be transformed into a system of three circle equations whose centers and radii are related to the corresponding PDOA measurements. The intersections of the circles represent possible locations for the radio emitter. For N sensors, we can have a maximum of N(N-1) intersections of the circles. Dividing the 2D space into a grid, each grid cell contains a certain number of intersections. This method finds the grid cell with the highest intersection density and uses the center of this cell as the position fix estimate. MATLAB-based numerical simulations were used to evaluate the performance of this algorithm for various scenarios and parameters.

Citation Download Citation

Shanzeng Guo, Brad Jackson, Sichun Wang, Robert Inkol, and William Arnold "A novel density-based geolocation algorithm for a noncooperative radio emitter using power difference of arrival", Proc. SPIE 8061, Wireless Sensing, Localization, and Processing VI, 80610E (24 May 2011); https://doi.org/10.1117/12.883306

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