研究目的
Investigating the possibility to perform direct positioning by retrieving information from the wavefront curvature at mm-wave with practical size antennas in the context of next 5G systems.
研究成果
The paper demonstrates that compact array architectures with at most 201 antennas can be exploited to guarantee accurate positioning performance exploiting only the wavefront curvature and using only a single antenna array, without requiring transmitter and receiver synchronization.
研究不足
The study accounts only for the line-of-sight (LOS) component and does not consider multipath effects or non-line-of-sight (NLOS) scenarios.
1：Experimental Design and Method Selection:
The study considers a dedicated model to gather the source position information from the wavefront curvature for different array architectures, i.e., traditional and lens-based arrays, and derives the maximum likelihood estimator to investigate the attainable performance.
2：Sample Selection and Data Sources:
A transmitting source located at position p, at distance d from the reference point of the RX, with different AOAs.
3：List of Experimental Equipment and Materials:
Antenna arrays with and without a lens, operating at 60 GHz, with a bandwidth W = 4 GHz and an effective radiated isotropic power (EIRP) of 20 dBm.
4：Experimental Procedures and Operational Workflow:
The signals received by all the antennas are collected and post-processed together to estimate the distance of the source using the ML estimator.
5：Data Analysis Methods:
The performance is evaluated in terms of the root mean square error (RMSE) of the position estimate.
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