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- W4248580708 abstract "Subarray-based hybrid beamforming (SBHB) systems represent an efficient architectural solution to realize massive multiple-input multiple-output (MIMO) systems. Thereby, the beamforming is no longer realized exclusively in the digital domain, but in coordination with an analog beamforming network by connecting each digital channel to a dedicated number of antenna elements via phase shifters. Most channel estimation and beamforming algorithms for SBHB systems are based on beam steering approaches, demanding a precise calibration of the analog beamforming network. In this letter, the SBHB system is calibrated by over-the-air (OTA) scattering parameter measurements and two criteria to optimize the beam pattern are formulated exploiting the ambiguities of the phase shifters. Both optimization criteria are evaluated using a designed SBHB receiver system operating at 27.8 GHz." @default.
- W4248580708 created "2022-05-12" @default.
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- W4248580708 date "2020-07-10" @default.
- W4248580708 modified "2023-10-17" @default.
- W4248580708 title "Beam Pattern Optimization Method for Subarray-based Hybrid Beamforming Systems" @default.
- W4248580708 doi "https://doi.org/10.36227/techrxiv.12639689.v1" @default.
- W4248580708 hasPublicationYear "2020" @default.
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