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Impact of Hardware Impairments with Imperfect Channel Estimation for Cache-Enabled UAV Relaying Networks
Wireless Communications and Mobile Computing ( IF 2.146 ) Pub Date : 2020-08-10 , DOI: 10.1155/2020/8891793
Dan Deng 1 , Yanyi Rao 2 , Fusheng Zhu 3
Affiliation  

The effects of hardware impairments with imperfect channel estimation for cache-enabled UAV networks are studied in this paper. The effects of the setup parameters, such as the number of cached or relaying nodes, the hardware impairment factor, the channel estimation error, and the transmission SNR, on the outage probability are present by deriving the exact closed-form expressions on outage probability. Also, the asymptotic results are present when the transmission SNR is large enough. From the asymptotic analysis, we can see that there is an error floor introduced by the hardware impairments and imperfect channel estimation. Specifically, the error floor is dependent on the channel estimation error factor, the hardware impairment distortion factor, and the QoS requirements. And the diversity order of the error floor for the cached/relaying links is equal to the number of cached/relaying UAV nodes.

中文翻译:

启用缓存的UAV中继网络的信道估计不完善对硬件损害的影响

本文研究了在启用缓存的无人机网络中,信道估计不完善对硬件损害的影响。通过推导停机概率的精确封闭式表达式,可以看到设置参数(例如缓存或中继节点的数量,硬件损害因子,信道估计误差和传输SNR)对停机概率的影响。而且,当传输SNR足够大时,会出现渐近结果。从渐近分析中,我们可以看到,由于硬件缺陷和不完善的信道估计而引入了一个错误基底。具体而言,错误底限取决于信道估计错误因子,硬件减损失真因子和QoS要求。
更新日期:2020-08-10
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