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The localization of sensor networks using positioning systems rather than a GPS device is of great interest in many real world applications. One of the systems involves a circular type localization using distance measurements, where the problem of localizing a free sensor with knowledge of three anchors in a 2D plane is formulated using the Cayley-Menger determinant with no closed-form solution. Under...
Measuring a distance using phase measurements is a common practice in many areas of engineering. Almost inevitably these measurements are accompanied by noise, and are always subject to ambiguity resulting from the phase of modulo . In the presence of phase ambiguity, where for instance the unknown distance is far longer than the wavelength of the signal carrying the phase measurement, the distance...
One of the major issues with the application of Radio Interferometric Positioning System (RIPS) is the ambiguous measurement caused by a wrapped signal phase. Multiple transmissions at different frequencies have been used to resolve the phase ambiguity of a RIPS measurement in the existing approaches. In practice, the ways to solve the ambiguity problem are heavily dominated by the power consumption...
A Radio Interferometric Positioning System (RIPS) is able to measure the sum of distance differences between four sensor nodes. If the locations of the three out of four sensor nodes are known, that of the fourth node may be determined using RIPS measurements via the techniques of hyperbolic positioning. One of the key issues with RIPS is the measurement ambiguity because of the wrapping of distance...
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