Efficient Joint DOA and TOA Estimation for Indoor Positioning With 5G Picocell Base Stations
نویسندگان
چکیده
The ubiquity, large bandwidth, and spatial diversity of the fifth generation (5G) cellular signal render it a promising candidate for accurate positioning in indoor environments where global navigation satellite system (GNSS) is absent. In this paper, joint angle delay estimation (JADE) scheme designed 5G picocell base stations (gNBs) which addresses two crucial issues to make both effective efficient realistic environments. Firstly, direction-dependence array modeling error gNB as well its impact on JADE revealed. This mitigated by fitting response measurements vector-valued function pre-calibrating ideal steering-vector with fitted function. Secondly, based deployment reality that gNBs only have small-scale antenna but proposed decouples time-of-arrival (TOA) direction-of-arrival (DOA) reduce huge complexity induced two-dimensional processing. It employs iterative-adaptive-approach resolve multipath signals TOA domain, followed conventional beamformer retrieve desired line-of-sight DOA. By further exploiting dimension-reducing pre-processing module accelerating spectrum computing fast Fourier transforms, an implementation achieved real-time JADE. Numerical simulations demonstrate superiority method terms DOA accuracy. Field tests show triangulation 0.44 m 90% cases using DOAs estimated at separated receiving points.
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ژورنال
عنوان ژورنال: IEEE Transactions on Instrumentation and Measurement
سال: 2022
ISSN: ['1557-9662', '0018-9456']
DOI: https://doi.org/10.1109/tim.2022.3191705