Optimal power allocation for a full-duplex multicarrier decode-forward relay system with or without direct link

Full-duplex (FD) communication and spatial modulation (SM) are two promising techniques to achieve high spectral efficiency. Recent works in the literature have investigated the possibility of combining the FD mode with SM in the relay system to benefit their advantages. In this paper, we analyze the performance of the FD-SM decode-and-forward (DF) relay system and derive the closed-form expression for the symbol error probability (SEP). To tackle the residual self-interference (RSI) due to the FD mode at the relay, we propose a simple yet effective power allocation algorithm to compensate for the RSI impact and improve the system SEP performance. Both numerical and simulation results confirm the accuracy of the derived SEP expression and the efficacy of the proposed optimal power allocation.

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Secure Communication for Uplink Cellular Networks Assisted with Full-Duplex Device-to-Device User

Future Internet ◽

10.3390/fi12100175 ◽

2020 ◽

Vol 12 (10) ◽

pp. 175

Author(s):

Xin Song ◽

Lin Xia ◽

Siyang Xu ◽

Yue Wang

Keyword(s):

Power Allocation ◽

Cellular Networks ◽

Secure Communication ◽

Full Duplex ◽

Closed Form Expression ◽

Optimal Power Allocation ◽

Secrecy Rate ◽

Optimal Power ◽

Device To Device ◽

Allocation Factor

In this paper, the secure communication based on the full-duplex (FD) device-to-device (D2D) in cellular networks is proposed. For the proposed scheme, the novel model is established, in which a D2D user is played as a relay operating in FD mode to assist in the secure transmission of uplink information. Considering that the D2D user as a relay is untrusted, D2D link rate maximization is formulated with the constraint of secrecy rate, which ensures the security of uplink cellular networks. To cope with the optimization problem, the optimal power allocation factors of the cellular user (CU) and the D2D user are jointly optimized. Firstly, by using the monotonicity of the objective function, the optimal solution of the power allocation factor at the D2D user can be obtained. Subsequently, the closed-form expression of the optimal power allocation factor at the CU is derived and verified that the solution is the global minimum point. Simulation results verify that the proposed scheme has better output performance than the conventional scheme.

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Optimal power allocation for AF full-duplex relay in cognitive radio networks

2013 IEEE Globecom Workshops (GC Wkshps) ◽

10.1109/glocomw.2013.6825007 ◽

2013 ◽

Cited By ~ 4

Author(s):

Yu Shi ◽

Lin Zhang ◽

Zhi Chen ◽

Yu Gong ◽

Gang Wu

Keyword(s):

Cognitive Radio ◽

Power Allocation ◽

Cognitive Radio Networks ◽

Radio Networks ◽

Full Duplex ◽

Optimal Power Allocation ◽

Optimal Power ◽

Full Duplex Relay

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An Optimal Power Allocation for the Two-Way Relay System Using Physical-Layer Network Coding

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.986-987.2041 ◽

2014 ◽

Vol 986-987 ◽

pp. 2041-2047

Author(s):

Ren Gang Yuan ◽

Li Li Chu ◽

Chuang Li ◽

Ling Li Cao

Keyword(s):

Power Allocation ◽

Network Coding ◽

Physical Layer ◽

Optimal Power Allocation ◽

Relay Channel ◽

Allocation Scheme ◽

Relay System ◽

Physical Layer Network Coding ◽

Optimal Power ◽

Sum Rate

In this letter, an optimal power allocation in the two-way relay channel of four transmission nodes employing the physical-layer network coding (PNC) protocol is proposed to improve the network sum-rate of the two-way relay system. The optimal power allocation is obtained by maximizing the network sum-rate of the PNC protocol under a sum-power constraint in a Rayleigh fading channel environment. Analytical and simulation results show that the proposed power allocation can improve the network sum-rate. Furthermore, compared with the equal power allocation scheme, the proposed power allocation scheme can achieve much higher network sum-rate performance.

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