In this paper, we investigate the downlink channel state information (CSI) feedback for frequency-division duplexing (FDD) massive multiple-input multiple-output (MIMO) communications with orthogonal frequency division multiplexing (OFDM) modulation. By formulating CSI feedback as a lossy compression problem, we study...
Yu-Hao Zhang, D. Shi, Chen Sun et al.· IEEE Transactions on Wireles...· 0 citations
Proof of verifiable delay (PoVD), a lightweight consensus protocol based on the verifiable delay function (VDF), is proposed and it is pointed out that, under a relatively weak network assumption, PoVD can achieve a lower fork rate than PoW while maintaining the same throughput.
Rui Jiang, Xintong Ling, Bin Cao et al.· 0 citations
Movable antennas (MAs) boost sensing capabilities by exploiting the extra degrees of freedom (DoFs) through flexible positioning. The design of MA arrays is typically challenged by directional uncertainty, where the target’s precise angle is unknown. To address this, we propose a region-oriented design framework focusi...
Yang Xia, Chen Sun, Xi-Qi Gao· IEEE Transactions on Communi...· 0 citations
This work proposes the blockchain-based proportional fair scheduling (BC-PFS) that enables trustworthy inter-network coordination and resource pooling across operators in O-RAN and designs four core smart contracts including registration, status reporting, scheduling, and settlement contracts with corresponding Solidit...
Kun Huang, Xintong Ling, Mei-Ning Wu et al.· 0 citations
Channel charting (CC) is a self-supervised learning technique which aims to construct a lower-dimensional representation of the channel measurements, while preserving the neighboring relationship of users. In this letter, we propose a machine learning approach for radio-based localization task with the aid of CC, which...
Tian-Xiang Xu, Li You, Jue Wang et al.· IEEE Wireless Communications...· 0 citations
Orthogonal frequency division multiplexing (OFDM) is widely adopted in modern wireless systems for high spectral efficiency, yet its high peak-to-average power ratio (PAPR) limits power amplifier efficiency. Mixed-numerology transmission, which enables flexible subcarrier spacing for diverse services, further aggravate...
Shuai Cui, Ruiding Hou, Jia-Heng Wang et al.· IEEE Communications Letters· 0 citations
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