A Trellis-Based Passive Beamforming Design for an Intelligent Reflecting Surface-Aided MISO System
نویسندگان
چکیده
In this letter, the downlink transmission of an intelligent reflecting surface (IRS)-assisted multiple-input single-output (MISO) system is investigated where IRS elements are selected from a predefined discrete set phase shifts. We minimize mean square error (MSE) received symbols in via optimizing shifts at jointly with beamforming vectors base station (BS) and equalizers user terminals. order to find optimal shifts, trellis-based structure used that smartly selects phases. Moreover, for sake comparison, semi-definite programming (SDP)-based optimization also presented. The BS beamformer determined closed-form solutions. Numerical results demonstrate scheme has better performance compared other shift designs, such as SDP quantized majorization-minimization technique, while maintaining very low computational complexity.
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ژورنال
عنوان ژورنال: IEEE Communications Letters
سال: 2022
ISSN: ['1558-2558', '1089-7798', '2373-7891']
DOI: https://doi.org/10.1109/lcomm.2022.3157962