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In this paper, we propose a new multipath exploitation approach for urban target localization with a single radar unit. The proposed approach utilizes the embedded directivity in ultra wideband (UWB) antennas to estimate target positions using interior wall multipath returns. We assume resolvability of the multipath components, which is made possible by virtue of using UWB radar signals. This approach...
This paper presents an improved algorithm for mitigating non-line-of-sight (NLOS) error in time-difference-of-arrival (TDOA) positioning applications employing ultra wideband (UWB) signals. The main idea of the algorithm is based on calculating the residuals for the different subsets formed by the reference nodes. The final estimate is a linear summation of the estimate from the different sets weighted...
The paper addresses the problem of channel estimation in Impluse-Radio Ultra-Wideband (IR-UWB) communication system. The IEEE 802.15.4a channel model is used where the channel is assumed to be Linear Time Invariant (LTI) and thus the problem of channel estimation becomes the estimation of the sparse channel taps and their delays. Since, the bandwidth of the signal is very large, Nyquist rate sampling...
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