The Manifestation of Spatial Wideband Effect in Circular Array: From Beam Split to Beam Defocus

no code implementations • 4 May 2023 • Zidong Wu, Linglong Dai

However, the growing bandwidth of mmWave and THz communications require frequency-independent phase shifts, which can not be perfectly realized through frequency-independent phase shifters (PSs) in classical hybrid precoding architectures.

Location Division Multiple Access for Near-Field Communications

no code implementations • 22 Jan 2023 • Zidong Wu, Linglong Dai

Spatial division multiple access (SDMA) is essential to improve the spectrum efficiency for multi-user multiple-input multiple-output (MIMO) communications.

Multiple access for near-field communications: SDMA or LDMA?

no code implementations • 12 Aug 2022 • Zidong Wu, Linglong Dai

The classical SDMA for massive MIMO with hybrid precoding heavily relies on the angular orthogonality in the far field to distinguish multiple users at different angles, which fails to fully exploit spatial resources in the distance domain.

Demo: low-power communications based on RIS and AI for 6G

no code implementations • 21 May 2022 • Mingyao Cui, Zidong Wu, Yuhao Chen, Shenheng Xu, Fan Yang, Linglong Dai

By jointly designing the hardware and software, this prototype can realize real-time 4K video transmission with much reduced power consumption.

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