Citation

Salem, Mohammed Ahmed (2020) Cooperative Relay Transmission Under Physical Layer Security For Wireless Networks. Masters thesis, Multimedia University.

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Abstract

The broadcast characteristic of a wireless networks which is exploited in cooperative communications leads to a variety of security vulnerabilities. The increasing number of applications using wireless network such as Internet of Things' applications will make it even more difficult for the existing security system to survive due to many factors such as the open nature of the wireless network, high computational complexity in the current security algorithms as well as the problems related to the key distribution and management. Physical layer security considered an additional security layer to the existing cryptography techniques and for some applications can be stand-alone security. The existing physical layer security techniques are classified into five main categories: code, power, theoretical, signal and signal detection approaches. The physical layer security (PLS) is a grown research field that exploits the characteristics of the physical wireless channel to prevent the eavesdropper interruptions and attacks. The use of the cooperative relay transmission is a method to approach the physical layer security. In this research, a cooperative jamming protocol is proposed to enhance the physical layer security, where the destination sends jamming signals to the eavesdropper node to degrade its channel capacity. In this research, the secrecy performance metrics namely the secrecy capacity and the secrecy outage probability applied on the proposed cooperative jamming protocol are presented and discussed to measure the secrecy level of the technique. The technology of non-orthogonal multi access (NOMA) is an essential supporting for the fifth generation (5G) wireless networks. The advantages of NOMA are significantly illustrated in achieving the heterogeneous demands for high throughput, enhanced fairness, high reliability, massive connectivity, and low latency. The importance of NOMA lies in the ability of serving multi users in a single resource block such as a spreading code, a subcarrier, or a time slot. In this research, a cooperative node selection based on feed forward neural networks (FFNN) is proposed in order to improve the physical layer security (PLS) of a cooperative NOMA network.

Item Type:	Thesis (Masters)
Additional Information:	Call No: TK5105.55 .M64 2020
Uncontrolled Keywords:	Computer network protocols
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101-6720 Telecommunication. Including telegraphy, telephone, radio, radar, television
Divisions:	Faculty of Engineering and Technology (FET)
Depositing User:	Ms Nurul Iqtiani Ahmad
Date Deposited:	22 May 2023 07:45
Last Modified:	22 May 2023 07:45
URII:	http://shdl.mmu.edu.my/id/eprint/11424

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