Mengnan Jian

Towards Electromagnetic-Field Physical AI for 6G: Concepts, Architecture, and Standardization

Yajun Zhao, Mengnan Jian, Yongpeng Wu

Physical AI is conventionally associated with robots, vehicles, and other mechanically embodied systems. This article extends Physical AI to electromagnetic-field embodiment, where RF-programmable hardware acts on real electromagnetic fields and propagation environments via phased arrays, reconfigurable intelligent surfaces, and programmable wireless environments. …

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RIS-Enabled UAV Communications and Sensing: Opportunities, Challenges, and Key Technologies

Yajun Zhao, Mengnan Jian, Yifei Yuan

Unmanned Aerial Vehicles (UAVs) play a pivotal role in the emerging low-altitude economy. However, they face significant challenges in achieving reliable network coverage during transit operations. This paper provides an in-depth investigation into the characteristics and challenges of communication networks tailored for …

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Evolution From NCR for 5G-Advanced to RIS for 6G: A Unified System Framework and Standardization Roadmap

Yajun Zhao, Linglong Dai, Yifei Yuan, Mengnan Jian et autres

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Spatial Scattering Shift Keying for mmWave MIMO Systems

Xusheng Zhu, Qingqing Wu, Wen Chen, Yang Liu et autres

This paper proposes a millimeter-wave (mmWave) multiple-input multiple-output (MIMO) transmission scheme termed spatial scattering shift keying (SSSK), which exploits spatial scattering modulation (SSM) to encode information through the indices of channel scatterers rather than conventional symbol constellations. The proposed SSSK achieves superior …

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Beamforming Design for Intelligent Reflecting Surface Aided Near-Field THz Communications

Chi Qiu, Qingqing Wu, Wanming Hao, Mengnan Jian et autres

Intelligent reflecting surfaces (IRSs) operating in the terahertz (THz) band have gained considerable interest due to their high spectral bandwidth. With large-scale IRS deployment, transceivers are likely to be in the near-field region, where the near-field beam split effect becomes a major …

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Joint Size and Placement Optimization for IRS-Aided Communications With Active and Passive Elements

Qiaoyan Peng, Qingqing Wu, Wen Chen, Chaoying Huang et autres

Different types of intelligent reflecting surfaces (IRS) are exploited for assisting wireless communications. The joint use of passive IRS (PIRS) and active IRS (AIRS) emerges as a promising solution owing to their complementary advantages. They can be integrated into a single hybrid …

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Reconfigurable Intelligent Surfaces for 6G: Engineering Challenges and the Road Ahead

Xianming Zhao, Mengnan Jian, Yijian Chen, Yajun Zhao et autres

Reconfigurable Intelligent Surfaces (RISs) have emerged as a pivotal technology for the Sixth-Generation (6G) communication system, showcasing the ability to configure wireless environment dynamically. Acknowledged as a breakthrough in enhancing network coverage, augmenting system capacity, and facilitating advanced applications such as Integrated …

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Joint Size and Placement Optimization for IRS-Aided Communications with Active and Passive Elements

Qiaoyan Peng, Qingqing Wu, Wen Chen, Chaoying Huang et autres

Different types of intelligent reflecting surfaces (IRS) are exploited for assisting wireless communications. The joint use of passive IRS (PIRS) and active IRS (AIRS) emerges as a promising solution owing to their complementary advantages. They can be integrated into a single hybrid …

Near-Field Wideband Beamforming for RIS Based on Fresnel Zone

Qiumo Yu, Linglong Dai, Mengnan Jian

Reconfigurable intelligent surface (RIS) has emerged as a promising solution to overcome the challenges of high path loss and easy signal blockage in millimeter-wave (mmWave) and terahertz (THz) communication systems. With the increase of RIS aperture and system bandwidth, the near-field beam …

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6G Near-Field Communication: Propagation Analysis and EDoF Evaluation

Mengnan Jian, Yijian Chen, Nan Zhang, Yajun Zhao

In the future sixth generation of mobile wireless technology (6G) networks, the introduction of high-frequency spectra and the adoption of new technologies such as extremely large-scale MIMO (XL-MIMO), reconfigurable intelligent surface (RIS), and distributed MIMO are likely to make near-field communication a …

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6G Near-Field Communication: Novel Channel Characteristics and High-Rank Codebook Design

Mengnan Jian, Yijian Chen, Nan Zhang, Yajun Zhao

With the development of the sixth generation of mobile communication (6G) technology, near-field transmission has emerged as a critical focus in wireless communication. To tackle the challenges of channel modelling and transmission, a high-rank codebook for 6G near-field communication is explored, focusing …

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Deployment Design for Hybrid Active/Passive IRS-Aided Communications

Qiaoyan Peng, Qingqing Wu, Wen Chen, Shaodan Ma et autres

Different types of intelligent reflecting surfaces (IRS) are exploited for assisting wireless communications. The joint use of passive IRS (PIRS) and active IRS (AIRS) emerges as a promising solution owing to their complementary advantages. In this paper, we investigate the capacity of …

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