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- W4385299750 abstract "Communications system with analog or hybrid analog/digital architectures usually relies on a pre-defined codebook to perform beamforming. With the increase in the size of the antenna array, the characteristics of the spherical wavefront in the near-field situation are not negligible. Therefore, it is necessary to design a codebook that is adaptive to near-field scenarios. In this letter, we investigate the hierarchical codebook design method in the near-field situation. We develop a steering beam gain approximation method and design the lower-layer codebook to provide coverage for the Fresnel region. For the upper-layer codebook, we propose beam rotation and beam relocation methods to place an arbitrary beam pattern to a target location. The simulation results show the superiority of the proposed near-field hierarchical codebook design." @default.
- W4385299750 created "2023-07-28" @default.
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- W4385299750 date "2023-01-01" @default.
- W4385299750 modified "2023-10-16" @default.
- W4385299750 title "Hierarchical Codebook Design for Near-Field MmWave MIMO Communications Systems" @default.
- W4385299750 doi "https://doi.org/10.1109/lwc.2023.3299354" @default.
- W4385299750 hasPublicationYear "2023" @default.
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