Abstract
Multipath effect is considered to be one of the main factors affecting the positioning accuracy of pseudolite. Using antenna array to generate strong directional signal as an advanced multipath suppression method can be applied to pseudolite indoor positioning, but the indoor pseudolite array signal propagation effect is an important but not well solved problem. This paper mainly studies the propagation direction and received power of indoor pseudolite array signals. In this paper, a pseudolite array antenna structure suitable for indoor positioning and pseudolite array indoor positioning algorithm are proposed for the special signal system of pseudolite. Combined with the indoor practical application environment of pseudolite, the propagation direction and received power of the isotropic antenna and two special uniform linear arrays in the room are verified by the image method. The results show that the lobes of the two array-type pseudolite antennas are more concentrated than the isotropic antenna, and the energy can be concentrated more from the side lobes to the main lobe, and the radiation range is relatively large. At the same time, the two array antennas can generate high gain in the direction of arrival of the useful signal, and the received power can reach the maximum value of −40 dB, and the interference signal is attenuated, which provides the possibility for the establishment of the remote pseudolite transmission link.
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Acknowledgments
We appreciate anonymous reviewers for their valuable comments and improvements to this manuscript. Thanks also go to the National Key Technologies R&D Program (Grant Number 2016YFB0502101) and National Natural Science Foundation of China (No: 41574026, 41774027).
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Wang, X., Pan, S., Zhao, Y., Xia, Y. (2019). Propagation Characteristics of Pseudolite Array Signals Indoors. In: Sun, J., Yang, C., Yang, Y. (eds) China Satellite Navigation Conference (CSNC) 2019 Proceedings. CSNC 2019. Lecture Notes in Electrical Engineering, vol 563. Springer, Singapore. https://doi.org/10.1007/978-981-13-7759-4_23
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DOI: https://doi.org/10.1007/978-981-13-7759-4_23
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