Print Email Facebook Twitter Sparse Signal Bands Selection for Precise Time-based Ranging in Terrestrial Positioning Title Sparse Signal Bands Selection for Precise Time-based Ranging in Terrestrial Positioning Author Dun, H. (TU Delft Mathematical Geodesy and Positioning) Tiberius, C.C.J.M. (TU Delft Mathematical Geodesy and Positioning) Diouf, C.E.V. (TU Delft Mathematical Geodesy and Positioning) Janssen, G.J.M. (TU Delft Signal Processing Systems) Date 2020 Abstract Time-based ranging accuracy is inversely proportional to the signal bandwidth. A larger the signal bandwidth leads to a higher accuracy of time delay estimation, but more complex hardware is needed. Alternatively, we explore the idea of using multiple narrow signal bands (e.g., 10 MHz of each) to create a large virtual signal bandwidth, which maintains the spectral efficiency but largely improves the ranging accuracy. Considering the impact of multipath, the propagation delay of the LoS path is computed from the estimated channel impulse response (CIR). In this paper, we propose an approach to sparsely select signal bands for ranging and positioning based on convex optimization. The Cramér-Rao lower bound (CRLB) for the propagation delay and gain estimators, as a performance criterion, is employed in the constraint of the optimization. The CRLB is derived in a two-path channel, so that the accuracy and the correlation between the LoS path and the reflection are taken into account. Experiments are conducted in a laboratory environment to illustrate the proposed signal design methodology dedicated for ranging with a sub-decimeter accuracy. Subject convex optimizationCramér-Rao lower boundmultipath channelOFDMrangingtime delay estimation To reference this document use: http://resolver.tudelft.nl/uuid:dea4863c-19dd-4e6e-9c4c-43a2f6f02c0f DOI https://doi.org/10.1109/PLANS46316.2020.9110197 Publisher IEEE ISBN 978-1-7281-9446-2 Source 2020 IEEE/ION Position, Location and Navigation Symposium (PLANS) Event 2020 IEEE/ION Position, Location and Navigation Symposium, PLANS 2020, 2020-04-20 → 2020-04-23, Portland, United States Bibliographical note Accepted Author Manuscript Part of collection Institutional Repository Document type conference paper Rights © 2020 H. Dun, C.C.J.M. Tiberius, C.E.V. Diouf, G.J.M. Janssen Files PDF PID6319471.pdf 604.59 KB Close viewer /islandora/object/uuid:dea4863c-19dd-4e6e-9c4c-43a2f6f02c0f/datastream/OBJ/view