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This paper describes the extension to a noncoherent impulse radio (IR) ultra-wide band (UWB) transceiver for precise time-of-arrival (TOA) measurements. The extension provides a time resolution of 260 picoseconds, which allows a precise indoor localization. The concept of this extension is especially dedicated to the known drawbacks of energy detection (non-coherent) receivers. The discussion of the...
Ultra-wideband (UWB) has become one of the key technologies in wireless communication industries. In this paper we discuss and evaluate the performance of UWB under different channel conditions when it is applied for wireless sensors. The simulation was carried out for various detection and modulation schemes. Simulation results confirm that UWB with coherent detection outperforms the noncoherent...
The objective of this paper is an improvement of positioning accuracy in critical scenarios where measurements from communications systems and global navigation satellite systems (GNSSs) were combined. For the communications system we use time difference of arrival (TDOA) information obtained from an orthogonal frequency division multiplexing (OFDM) based communications system where underlying synchronization...
A sequential Bayesian estimation algorithm for joint positioning and multipath mitigation in global navigation satellite systems is presented, with an underlying process model that is especially designed for dynamic user scenarios and dynamic channel conditions. In order to facilitate efficient integration into receivers it builds upon complexity reduction concepts that previously have been applied...
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