VSB, Technical University of Ostrava, 17. listopadu 15/2172, 708 33 Ostrava, Poruba, Czech Republic.
Faculty of Electronics Technology, Industrial University of Ho Chi Minh City, Ho Chi Minh City 700000, Vietnam.
Sensors (Basel). 2019 Mar 7;19(5):1160. doi: 10.3390/s19051160.
In this paper, we evaluate the secrecy performance of multi-hop cognitive wireless sensor networks (WSNs). In the secondary network, a source transmits its data to a destination via the multi-hop relaying model using the transmit antenna selection (TAS)/selection combining (SC) technique at each hop, in the presence of an eavesdropper who wants to receive the data illegally. The secondary transmitters, including the source and intermediate relays, have to harvest energy from radio-frequency signals of a power beacon for transmitting the source data. Moreover, their transmit power must be adjusted to satisfy the quality of service (QoS) of the primary network. Under the joint impact of hardware imperfection and interference constraint, expressions for the transmit power for the secondary transmitters are derived. We also derive exact and asymptotic expressions of secrecy outage probability (SOP) and probability of non-zero secrecy capacity (PNSC) for the proposed protocol over Rayleigh fading channel. The derivations are then verified by Monte Carlo simulations.
在本文中，我们评估了多跳认知无线传感器网络（WSN）的保密性能。在次网络中，源通过多跳中继模型使用发射天线选择（TAS）/选择合并（SC）技术将其数据传输到目的地，同时存在一个希望非法接收数据的窃听者。包括源和中间中继器在内的次网络发送器必须从功率信标射频信号中获取能量以传输源数据。此外，它们的发射功率必须进行调整以满足主网络的服务质量（QoS）要求。在硬件不完善和干扰约束的共同作用下，为二次发射机推导了发射功率的表达式。我们还针对瑞利衰落信道推导了所提出协议的保密中断概率（SOP）和非零保密容量概率（PNSC）的精确和渐近表达式。然后通过蒙特卡罗模拟进行了验证。
