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Received signal strength (RSS) based localization schemes can be categorized as device-based localization (DBL) and device-free localization (DFL) in terms of the target to be located. DBL transforms RSS measurements of anchor-tag links to ranges and then obtains the target's position through trilateration. DFL infers an attenuation image from the target's body shadowing and regards the position with...
Device-free localization (DFL) localizes the target by employing the variation of received signal strength (RSS) due to the presence of the target which wears no device. The existing fingerprint-based DFL (FDFL) method simply compares the online RSS variations with the radio map and does not care about how RSS variation is caused. However, we have found that when some links are shadowed by the target,...
Device-free localization (DFL) based on received signal strength (RSS) measurements functions by measuring RSS variation due to the presence of the target. The accuracy of a certain localization method closely depends on the accuracy of the measurement model itself. Existing models have been found not accurate enough under certain circumstances as they cannot explain some phenomena observed in DFL...
ICEPAC (Ionospheric Communication Enhanced Profile Analysis and Circuit Prediction Program) based mainly on measurements of HF field-strength and system loss is applied in this paper. Some aspects of propagation in HF band are analyzed. A comparative study of the commonly used HF propagation models is presented. The ground-wave propagation is deeply investigated. Finally, we use the statistical model-based...
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