no code implementations • 4 Jun 2024 • Zhuoyin Dai, Jingran Xu, Xiaoli Xu, Ruoguang Li, Yong Zeng
Specifically, the conjugate beamforming is applied in hybrid cellular and cell-free networks, which enables user equipment (UE) to benefit from both cellular BSs and cell-free APs.
no code implementations • 13 Mar 2024 • Zhuoyin Dai, Di wu, Zhenjun Dong, Kun Li, Dingyang Ding, Sihan Wang, Yong Zeng
In this paper, to alleviate the large training overhead in millimeter wave (mmWave) beam alignment, an environment-aware and training-free beam alignment prototype is established based on a typical CKM, termed beam index map (BIM).
no code implementations • 27 Jun 2022 • Jingran Xu, Zhuoyin Dai, Yong Zeng
Symbiotic radio has emerged as a promising technology for spectrum- and energy-efficient wireless communications, where the passive secondary backscatter devices (BDs) reuse not only the spectrum but also the power of the active primary users to transmit their own information.
no code implementations • 17 May 2022 • Zhuoyin Dai, Ruoguang Li, Jingran Xu, Yong Zeng, Shi Jin
We first derive the achievable communication rates of the active primary user and passive secondary user under the assumption of perfect channel state information (CSI), based on which the transmit beamforming of the cellfree APs is optimized to characterize the achievable rate-region of cell-free symbiotic communication systems.
no code implementations • 10 Jun 2021 • Jingran Xu, Zhuoyin Dai, Yong Zeng
To address this issue and enable full mutualism of symbiotic radio, in this paper, we study symbiotic radio with massive number of BDs.
