The sixth generation (6G) wireless communication system requires extreme capacity and coverage, which can be achieved through the introduction of higher frequency and ultra-large-scale reconfigurable intelligent surface (RIS) array. This also enables the expansion of the near-field range to tens or even hundreds of meters. However, near-field beamforming presents different challenges than far-field beamforming, as it involves two parameters (angle and distance) rather than just angle. This requires a larger number of codewords for near-field beams and frequent beam switching due to the narrow beamwidth. To address these challenges, we propose an enhancement to the ring-type codebook (RTC) using non-uniform quantization of focal length and beamwidth control methods. Our proposed methods effectively reduce the beam management overhead and SNR fluctuation by 34% and 4dB respectively, while also improving the robustness of the beams. Overall, our proposed enhancement to the RTC can significantly improve the performance of near-field beamforming in the 6G wireless communication systems, enabling them to satisfy the extreme capacity and coverage requirements of the future.


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    Title :

    Near-Field Beam Management with Ring-type Codebook


    Contributors:
    Wang, Fan (author) / Wang, Xin (author) / Li, Xiang (author) / Hou, Xiaolin (author) / Chen, Lan (author) / Suyama, Satoshi (author) / Asai, Takahiro (author)


    Publication date :

    2023-06-01


    Size :

    6460203 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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