次用户通信对主用户安全通信的影响
Impact of Secondary User Communication on Security Communication of Primary User
摘要：
最近，频谱共享被认为是提高频谱利用率的一种有前途的解决方案。然而，它可能容易受到安全问题的影响，因为主网络和辅助网络访问相同的资源。因此，在本文中，我们专注于在存在窃听者（EAV）谁非法监听主用户（PU）通信的认知无线电网络的性能分析，其中的次级发射机（SU-Tx）的发射功率受到SU-Tx的峰值发射功率和中断概率的联合约束。在此基础上，推导了SU的自适应发射功率策略和误符号概率的解析表达式。最重要的是，主网络的安全性评估的非零保密容量的存在概率和保密容量的中断概率。仿真结果表明，主网络的安全性不仅取决于主网络和辅网络之间的信道平均功率，还与SU-Tx到EAV链路的信道条件和SU-Tx的发射功率策略密切相关。
英文摘要：
Recently, spectrum sharing has been considered as a promising solution to improve the spectrum utilization. It however may be vulnerable to security problems as the primary and secondary network access the same resource. Therefore, in this paper, we focus on the performance analysis of a cognitive radio network in the presence of an eavesdropper (EAV) who illegally listens to the primary user (PU) communication in which the transmit power of the secondary transmitter (SU-Tx) is subject to the joint constraint of peak transmit power of the SU-Tx and outage probability of the PU. Accordingly, an adaptive transmit power policy and an analytical expression of symbol error probability are derived for the SU. Most importantly, security evaluations of primary network in terms of the probability of existence of non-zero secrecy capacity and outage probability of secrecy capacity are obtained. Numerical results reveal a fact that the security of the primary network does not only depends on the channel mean powers between primary and secondary networks, but also strongly depends on the channel condition of the SU-Tx to EAV link and transmit power policy of the SU-Tx.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
