Zobrazeno 1 - 10
of 338
pro vyhledávání: '"Xiao Chengshan"'
A wiretap channel is served as the fundamental model of physical layer security techniques, where the secrecy capacity of the Gaussian wiretap channel is proven to be achieved by Gaussian input. However, there remains a gap between the Gaussian secre
Externí odkaz:
http://arxiv.org/abs/2411.06339
Autor:
Li, Tianya, Wu, Yongpeng, Gao, Junyuan, Zhang, Wenjun, Xia, Xiang-Gen, Ng, Derrick Wing Kwan, Xiao, Chengshan
This paper investigates asynchronous multiple-input multiple-output (MIMO) massive unsourced random access (URA) in an orthogonal frequency division multiplexing (OFDM) system over frequency-selective fading channels, with the presence of both timing
Externí odkaz:
http://arxiv.org/abs/2405.11883
This letter investigates the weighted sum rate maximization problem in movable antenna (MA)-enhanced systems. To reduce the computational complexity, we transform it into a more tractable weighted minimum mean square error (WMMSE) problem well-suited
Externí odkaz:
http://arxiv.org/abs/2404.09734
This paper investigates the multiple-input-multiple-output (MIMO) massive unsourced random access in an asynchronous orthogonal frequency division multiplexing (OFDM) system, with both timing and frequency offsets (TFO) and non-negligible user collis
Externí odkaz:
http://arxiv.org/abs/2305.13753
In this paper, the analysis of excess distortion exponent for joint source-channel coding (JSCC) in semantic-aware communication systems is presented. By introducing an unobservable semantic source, we extend the classical results by Csiszar to seman
Externí odkaz:
http://arxiv.org/abs/2301.04357
Autor:
Xie, Xinyu, Wu, Yongpeng, An, Jianping, Gao, Junyuan, Zhang, Wenjun, Xing, Chengwen, Wong, Kai-Kit, Xiao, Chengshan
This paper investigates the unsourced random access (URA) scheme to accommodate numerous machine-type users communicating to a base station equipped with multiple antennas. Existing works adopt a slotted transmission strategy to reduce system complex
Externí odkaz:
http://arxiv.org/abs/2202.08096
Autor:
Li, Tianya, Wu, Yongpeng, Zheng, Mengfan, Zhang, Wenjun, Xing, Chengwen, An, Jianping, Xia, Xiang-Gen, Xiao, Chengshan
In this paper, we investigate a joint device activity detection (DAD), channel estimation (CE), and data decoding (DD) algorithm for multiple-input multiple-output (MIMO) massive unsourced random access (URA). Different from the state-of-the-art slot
Externí odkaz:
http://arxiv.org/abs/2112.09310
Reconfigurable intelligent surface (RIS)-aided networks have been investigated for the purpose of improving the system performance. However, the introduced unit modulus phase shifts and coupling characteristic bring enormous challenges to the optimiz
Externí odkaz:
http://arxiv.org/abs/2106.15458
In this paper, we investigate a large intelligent surface-enhanced (LIS-enhanced) system, where a LIS is deployed to assist secure transmission. Our design aims to maximize the achievable secrecy rates in different channel models, i.e., Rician fading
Externí odkaz:
http://arxiv.org/abs/2009.00473
In this paper, we investigate the robust linear precoder design for three dimensional (3D) massive multi-input multi-output (MIMO) downlink with uniform planar array (UPA) and imperfect channel state information (CSI). In practical massive MIMO with
Externí odkaz:
http://arxiv.org/abs/2004.04331