计算机科学 ›› 2019, Vol. 46 ›› Issue (6): 168-173.doi: 10.11896/j.issn.1002-137X.2019.06.025
彭磊, 臧国珍, 高媛媛, 沙楠, 奚晨婧, 蒋炫佑
PENG Lei, ZANG Guo-zhen, GAO Yuan-yuan, SHA Nan, XI Chen-jing, JIANG Xuan-you
摘要： 针对外部窃听者对无线通信系统中的信息传输带来的安全威胁,首先提出了一种由源节点在发送源信息的同时发送人工干扰信号的安全传输方案。为有效消除人工干扰信号对合法目的端正确恢复源信息的影响,提出将LMS自适应算法应用于对接收信号中人工干扰信号的估计与消除。为检验所提方案的效果,文中以QPSK调制系统为例,专门设计了一种简单易行的人工干扰信号。通过对系统误比特率进行MATLAB仿真,验证了所提方案的有效性,并得到了所提方案中LMS自适应算法的最优步长因子和滤波器阶数。
中图分类号:
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