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Environment Mapping with 28 GHz Beam Steering Transceivers Using the SAGE Algorithm: Preliminary Results

par Shimuye, Nigus ;Oestges, Claude;Quitin, François
Référence 43rd Symposium on Information Theory and Signal Processing in the Benelux(May 11-12, 2023: Brussels, Belgium)
Publication Publié, 2023

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Résumé :

Abstract—This paper presents a multipath component (MPC) parameter estimator for indoor environment mapping that uses the 28 GHz radio band. It employs a commercial-off-the-shelf (COTS) radio frequency transceiver chipset capable of beam steering within an azimuth angle range of −78 and +78 but with only a single RF chain. Existing space-alternating generalized expectation-maximization (SAGE) algorithms for MPC parameter estimation are designed specifically for multi-antenna systems, with each antenna having its own baseband representation. By exploiting the beam steering characteristics, we adapted the SAGE algorithm to make it suitable for analyzing a single baseband-based multiantenna array system. The anechoic chamber measured array radiation pattern for each steering direction is used in our algorithm to determine the MPC contribution. In an office setting, the transmitter and receiver antenna beams are swept. All backscatter responses are collected for all possible pairs of transmitter/receiver steering angles, and an angular map that contains the power profile is produced. The performance of the proposed algorithm is validated by simulation and measurement data. Index Terms—Environment mapping, MPC, baseband, SAGE, beam steering, multi-antenna array.