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Performance of Cooperative Spatial Modulation with AF protocol in Wireless Relay Network

Chinese Journal of Electronics 2019年第1期28卷 143-151页

作者： YU Xiangbin PAN Qing WANG Cheng College of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics National Mobile Communications Research Laboratory Southeast University

By combing Spatial modulation(SM) with the amplify-and-forward(AF) cooperative communication, a cooperative SM scheme with AF(AF-SM) protocol is presented, and the corresponding Bit error rate(BER)performance is investigated. Based on the performance analysis, the error probability of antenna index estimation(Pa) and the error probability of symbol estimation(Pd),which constitutes the overall average BER, are derived,respectively. As a result, tightly approximate closedform expressions of Paand Pdare attained, *** these expressions, the closed-form overall average BER is achieved. During the analysis, the computational complexity of AF-SM detector is also provided in terms of the complex addition and multiplication ***, the asymptotic BER at high SNR and the corresponding diversity gain are further derived, and the resultant diversity gain of Nr+ 1 is obtained for the system with Nrreceive antennas. Simulation results show that our theoretical analysis is valid, and provides good performance evaluation method for cooperative SM system. Moreover, the BER performance can be effectively improved as Nrincreases due to higher diversity gain.

关键词： Spatial modulation(SM) Cooperative communication amplify and forward protocol Diversity gain Average bit error rate

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Performance Analysis of Cooperative OFDM Network with Ordered Subcarrier Pairing

Performance Analysis of Cooperative OFDM Network with Ordere...

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IEEE Wireless Communications and Networking Conference (WCNC)

作者： Li, Funian Wang, Deshang Huazhong Univ Sci & Technol Dept Elect & Informat Engn Wuhan 430074 Peoples R China

ISBN: (纸本)9781612842547

In cooperative OFDM networks, ordered subcarrier pairing (OSP) at the relay has been shown to improve the average end-to-end capacity evidently. In this paper, the statistical performance evaluations are provide for two-hop OFDM relay link with both amplify-and-forward (AF) and decode-and-forward (DF) protocol. First, closed-form expressions are derived for the probability density function (PDF) of the signal-to-noise ratio (SNR) of the mapped subcarrier pair link. Second, the performance of average symbol error probability (SEP) is given. The efficiency of the analytical performance is demonstrated through simulation results.

关键词： Analytical models Fading OFDM OFDM modulation Probability density function protocols Relays Signal to noise ratio amplify and forward communication amplify and forward protocol cooperative OFDM network cooperative communication decode and forward communication decode and forward protocol error statistics ordered subcarrier pairing probability probability density function protocols signal-to-noise ratio statistical performance evaluation symbol error probability two hop OFDM relay link

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Linear Precoding Designs for amplify-and-forward Multiuser Two-Way Relay Systems

Linear Precoding Designs for Amplify-and-Forward Multiuser T...

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54th Annual IEEE Global Telecommunications Conference (GLOBECOM)

作者： Wang, Rui Tao, Meixia Shanghai Jiao Tong Univ Dept Elect Engn Shanghai 200240 Peoples R China

ISBN: (纸本)9781424492688

We investigate the linear precoding designs for multiuser two-way relay system (MU-TWRS) where a multi-antenna base-station (BS) communicates with multiple single-antenna mobile stations (MSs) via a multi-antenna relay station (RS). The amplify-and-forward (AF) relay protocol is employed. The design goal is to optimize the precodings at BS, RS or both so as to minimize the total mean-square error (MSE) of the uplink messages while maintaining the individual signal-to-interference-plus-noise ratio (SINR) requirement for each downlink signal. We show that the BS precoding design problem can be converted to a standard second order cone programming (SOCP), while the RS precoding is non-convex for which a local optimal solution is obtained using an iterative algorithm. A joint BS-RS precoding is also obtained by alternating optimization of BS precoding and RS precoding with guaranteed convergence. Numerical results show that RS-precoding is superior to BS-precoding. Furthermore, the joint BS-RS precoding can significantly outperform the two individual precoding schemes. The implementation issues including complexity and feedback overhead are also discussed.

关键词： BS-precoding Downlink Interference Joints Optimization RS-precoding Relays Signal to noise ratio Vectors amplify and forward communication amplify and forward protocol concave programming cone programming interference suppression iterative algorithm iterative methods linear codes linear precoding design mean square error method mean square error methods mobile stations multi-antenna base station multi-antenna relay station multifrequency antennas multiuser channels multiuser two-way relay system nonconvex programming optimization precoding protocols signal to interference plus noise ratio uplink messages

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Age of Information in Wireless Sensor Networks with Non-linear Energy Harvesting and Outdated Channel State Information 95

Age of Information in Wireless Sensor Networks with Non-line...

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IEEE 95th Vehicular Technology Conference: (VTC-Spring)

作者： Hao, Zhenchao Jia, Xiangdong Xu, Jin Northwest Normal Univ Coll Comp Sci & Engn Lanzhou 730070 Peoples R China Nanjing Univ Posts & Telecommunicat Wireless Commun Key Lab Jiangsu Prov Nanjing 210003 Peoples R China

ISBN: (数字)9781665482431

ISBN: (纸本)9781665482431

In this paper, we study the age of information (AoI) for a sensor network with practical non-linear energy harvesting (NEH) and outdated channel state information (CSI). Specifically, we study a simple relay assisted network model, where the relay system uses amplify and forward (AF) protocol, the energy-limited sensor source harvests energy from the radio frequency (RF) signal of the relay that is connected to fixed energy source. We assume that the channel model follows the Rayleigh fading. Based on these, we drive the end-to-end block error probability, we also give mathematical expressions for the statistical descriptions of the time duration for the sensor fully recharging and the closed-form expression of the average AoI. The numerical results show the influence of parameters of NEH and outdated CSI.

关键词： Age of information non-linear energy harvesting outdated channel state information amplify and forward protocol

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