Zobrazeno 1 - 10
of 128
pro vyhledávání: '"Peng, Zhangjie"'
In this paper, we consider an extremely large-scale massive multiple-input-multiple-output (XL-MIMO) system. As the scale of antenna arrays increases, the range of near-field communications also expands. In this case, the signals no longer exhibit pl
Externí odkaz:
http://arxiv.org/abs/2405.09053
Autor:
Peng, Zhangjie, Zhu, Jianchen, Pan, Cunhua, Zhang, Zaichen, da Costa, Daniel Benevides, Elkashlan, Maged, Karagiannidis, George K.
Active reconfigurable intelligent surface (RIS) has attracted significant attention as a recently proposed RIS architecture. Owing to its capability to amplify the incident signals, active RIS can mitigate the multiplicative fading effect inherent in
Externí odkaz:
http://arxiv.org/abs/2405.03300
This letter considers an active reconfigurable intelligent surface (RIS)-aided multi-user uplink massive multipleinput multiple-output (MIMO) system with low-resolution analog-to-digital converters (ADCs). The letter derives the closedform approximat
Externí odkaz:
http://arxiv.org/abs/2404.13875
In this paper, we consider an reconfigurable intelligent surface (RIS)-aided frequency division duplex (FDD) massive multiple-input multiple-output (MIMO) downlink system.In the FDD systems, the downlink channel state information (CSI) should be sent
Externí odkaz:
http://arxiv.org/abs/2403.12453
Autor:
Chen, Xianzhe, Ren, Hong, Pan, Cunhua, Peng, Zhangjie, Zhi, Kangda, Liu, Yong, Xi, Xiaojun, Armada, Ana Garcia, Wang, Cheng-Xiang
This paper investigates a reconfigurable intelligent surface (RIS)-aided wideband massive multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) system with low-resolution analog-to-digital converters (ADCs). Frequenc
Externí odkaz:
http://arxiv.org/abs/2403.09058
Autor:
Peng, Zhangjie, Zhang, Zhibo, Pan, Cunhua, Di Renzo, Marco, Dobre, Octavia A., Wang, Jiangzhou
In this paper, we consider an active reconfigurable intelligent surface (RIS) to assist the multiuser downlink transmission in the presence of practical hardware impairments (HWIs), including the HWIs at the transceivers and the phase noise at the ac
Externí odkaz:
http://arxiv.org/abs/2402.10687
Autor:
Zeng, Ming, Hao, Wanming, Peng, Zhangjie, Chu, Zheng, Li, Xingwang, You, Changsheng, Pan, Cunhua
This article delves into advancements in resource allocation techniques tailored for systems utilizing reconfigurable intelligent surfaces (RIS), with a primary focus on achieving low-complexity and resilient solutions. The investigation of low-compl
Externí odkaz:
http://arxiv.org/abs/2311.03282
In this paper, we consider an active reconfigurable intelligent surface (RIS)-aided unmanned aerial vehicle(UAV)-enabled simultaneous wireless information and power transfer(SWIPT) system with multiple ground users. Compared with the conventional pas
Externí odkaz:
http://arxiv.org/abs/2306.10233
Reconfigurable intelligent surface (RIS) is a revolutionary technology to enhance both the spectral efficiency and energy efficiency of wireless communication systems. However, most of the existing contributions mainly focused on the study of passive
Externí odkaz:
http://arxiv.org/abs/2301.03822
This paper considers an active reconfigurable intelligent surface (RIS)-aided communication system, where an M-antenna base station (BS) transmits data symbols to a single-antenna user via an N-element active RIS. We use two-timescale channel state i
Externí odkaz:
http://arxiv.org/abs/2211.02628