基于门限判断DF协议的多无人机中继传输中断性能分析

doi:10.11959/j.issn.1000-0801.2020250

Abstract

Abstract:

The unmanned aerial vehicle (UAV) relay system has become a hot topic as an effective method for the remote transmission in wireless communications.By taking path loss into account,a relay cooperative transmission system model based on multiple UAVs was established firstly,and the maximum output signal-to-noise ratio (SNR) of the system with threshold-based decode-and-forward (DF) protocol was obtained.Then,by assuming that both the uplink and downlink experience Rician distribution,the closed-form expression for outage probability (OP) of the considered system with multiple UAVs was derived.Furthermore,the asymptotic OP formula at high SNR was also derived to show the diversity order and array gain of the considered system,which were convenient to reveal the effects of system parameters on the outage performance.Finally,the computer simulations verify the correctness of the theoretical analysis,and reveal the effect of the relay number,antenna number and the threshold on the system outage performance,thus the proposed scheme can provide guidance for the system design and application.

Key words: relay transmission, UAV communication, decode-and-forward, outage probability, performance analysis

CLC Number:

TN925

Zhenlei DAN,Xuewen WU,Jian OUYANG,Xiaoxiao WANG,Chenwei GU. Outage performance analysis for multi-UAV relay systems with threshold-based DF protocol[J]. Telecommunications Science, 2020, 36(8): 103-111.

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References 17

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参数	值
载波频率f/GHz	2
路径损耗常数α	10.6
路径损耗常数β	0.18
直达路径衰落指数η_LoS/dB	1
非直达路径衰落指数η_NLoS/dB	20

Outage performance analysis for multi-UAV relay systems with threshold-based DF protocol

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