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Interferometric phase filtering is an indispensable step to obtain accurate measurement of digital elevation model and surface displacement. In the case of low-correlation or complicated topography, traditional phase filtering methods fail in balancing noise elimination and phase preservation, which leads to inaccurate interferometric phase. A new nonlocal interferometric phase filtering method taking...
An optimal positioning algorithm based on polynomial fitting technique for non-line-of-sight (NLOS) environment is presented. First, NLOS errors in TOA measurements are mitigated using an orthogonal polynomial fitting technique. Then the standard deviation of LOS error is exploited to give an optimal location estimation of the mobile station (MS). Performance measure for location accuracy is calculated...
A novel mobile location method based on cooperative positioning using time-of-arrival (TOA) measurements to mitigate the impact of non-line-of-sight (NLOS) error in a hybrid cellular network is proposed. Our way to tackle the problem of NLOS error mitigation is divided into two steps: First, a technique is exploited to decide whether there is a NLOS path from the BS to the MS using range measurements...
A new Non-Line-of-Sight (NLOS) error identification and range approximation algorithm based on apriori knowledge of standard deviation of measurement noise in cellular networks is proposed. First, a NLOS error identification technique is exploited to decide whether there is a NLOS path from the base station (BS) to the mobile station (MS) using a time series of range measurements; Second, a weighted...
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