Accurate Direct Positioning in Distributed MIMO Using Delay-Doppler Channel Measurements
arxiv(2024)
摘要
Distributed multiple-input multiple-output (D-MIMO) is a promising technology
for simultaneous communication and positioning. However, phase synchronization
between multiple access points in D-MIMO is challenging, which requires methods
that function without the need for phase synchronization. We therefore present
a method for D-MIMO that performs direct positioning of a moving device based
on the delay-Doppler characteristics of the channel state information (CSI).
Our method relies on particle-filter-based Bayesian inference with a
state-space model. We use recent measurements from a sub-6 GHz D-MIMO OFDM
system in an industrial environment to demonstrate centimeter accuracy under
partial line-of-sight (LoS) conditions and decimeter accuracy under full
non-LoS.
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