Results 171 to 180 of about 18,041 (194)

Ergodic secrecy rate for Gaussian MISO wiretap channels with Rician fading

2010 Conference Record of the Forty Fourth Asilomar Conference on Signals, Systems and Computers, 2010
A Gaussian multiple-input single-output (MISO) wiretap channel model is considered, where there exists a transmitter equipped with multiple antennas, a legitimate receiver and an eavesdropper each equipped with a single antenna. We study the problem of finding the optimal input covariance that maximizes the ergodic secrecy rate subject to a power ...
Jiangyuan Li, Shuangyu Luo, Athina P. Petropulu   +2 more
semanticscholar   +3 more sources

Large-System Analysis of Artificial-Noise-Assisted Communication in the Multiuser Downlink: Ergodic Secrecy Sum Rate and Optimal Power Allocation

IEEE Transactions on Vehicular Technology, 2015
Security and privacy have become increasingly critical demands in wireless networks, which, however, are particularly susceptible to eavesdropping attacks due to the broadcast nature of radio signals. This paper considers the problem of secure communication in the multiuser downlink with a passive eavesdropper (Eve), whose channel state information ...
Na Li, Xiaofeng Tao, Huici Wu, Jin Xu, Qimei Cui   +4 more
semanticscholar   +3 more sources

Performance analysis and optimization of ergodic secrecy rates for downlink data transmission in massive MIMO-NOMA networks

Wireless Networks, 2022
Nam‐Phong Nguyen, Long D. Nguyen, Hôǹg Thái Nguyêñ, Tiến Hoa Nguyễn, Chuyen T. Nguyen   +4 more
semanticscholar   +4 more sources

Performance Analysis of Ergodic Secrecy Rates in Massive MIMO-NOMA Networks with Zero-Forcing Precoding

2019 International Conference on Advanced Technologies for Communications (ATC), 2019
In this paper, we investigate the secrecy performance of massive multiple-input multiple-output (MIMO) nonorthogonal multiple access (NOMA) networks with the presence of a passive eavesdropper. Based on the estimated channel state information in an uplink training phase, the base station precodes the confidential information using zero-forcing ...
Hôǹg Thái Nguyêñ, Nam‐Phong Nguyen, Anh T. Pham, Chuyen T. Nguyen   +3 more
semanticscholar   +3 more sources

Ergodic Secrecy Rate Analysis for RSMA Among Untrusted Users over Rician Fading Channels

GLOBECOM 2024 - 2024 IEEE Global Communications Conference
Rate-splitting multiple access (RSMA) is a technique that is widely used in next-generation wireless systems to efficiently manage multiple users. RSMA splits the transmission into two parts using rate splitting, which increases spectral efficiency ...
Pradosh Kumar Hota, Deepak Mishra, Ravikant Saini, Ankit Dubey   +3 more
semanticscholar   +3 more sources

Weighted Ergodic Sum Secrecy Rate Maximization in a NOMA System With Untrusted User Terminals

2024 IEEE 35th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)
Non-Orthogonal Multiple Access (NOMA) is a wireless communication technique that uses the Successive Interference Cancellation (SIC) strategy to achieve high efficiency.
Pradosh Kumar Hota, Deepak Mishra, Ravikant Saini, Ankit Dubey   +3 more
semanticscholar   +3 more sources

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Secure NOMA for Maximizing Ergodic Secrecy Fairness in the Presence of Untrusted Users

International Workshop on Signal Processing Advances in Wireless Communications, 2022
Designing a secure non-orthogonal multiple access (NOMA) system has recently sparked a lot of interest among researchers due to its competency over bandwidth utilization.
Pradosh Kumar Hota, Deepak Mishra, R. Saini, Ankit Dubey   +3 more
semanticscholar   +1 more source

Secrecy rate analysis for reconfigurable intelligent surface-assisted mimo communications with statistical CSI

China Communications, 2021
In this paper, a reconfigurable intelligent surface (RIS)-assisted MIMO wireless secure communication system is considered, in which a base station (BS) equipped with multiple antennas exploits statistical channel state information to communicate with a ...
Jie Liu, Jun Zhang, Qi Zhang, Jue Wang, Xinghua Sun   +4 more
semanticscholar   +1 more source

Impact of RIS on Outage Probability and Ergodic Rate in Wireless Powered Communication

Information and Communication Technology Convergence, 2023
Wireless powered communication (WPC) combines information and energy transmission for energy-constrained nodes. Reconfigurable intelligent surfaces (RISs) are capable of controlling radio signals in a dynamic and goal-oriented manner.
Waqas Khalid, Manish Nair, Trinh Van Chien, Heejung Yu   +3 more
semanticscholar   +1 more source

Secrecy Rate Maximization for MIMO DFRC System With Statistical CSI

IEEE Wireless Communications Letters
This letter addresses a security concern of the multiple-input multiple-output (MIMO) dual-functional radar-communication (DFRC) system where the target is regarded as a potential eavesdropper.
Yilong Liu, Jun Zhang, Yongxu Zhu, Shi Jin, Xiao Li   +4 more
semanticscholar   +1 more source