摘要
分析证明了普通的转发干扰模式并不能有效地干扰GPS接收机,提出了设计转发干扰模式必须精确控制转发时延。干扰机截获整数个码元长度的GPS信号,根据GPS卫星、GPS接收机以及干扰机3者之间的距离关系推导出转发干扰信号的人为延时时间,在此基础上进行点对点转发干扰。在不同强度GPS信号背景噪声的影响下,转发干扰能够获得16～26dB的干扰增益(相对白噪声干扰),在很大程度上节省了干扰功率。
Based on the theoretical analysis that the traditional retransmitted jamming can not jam GPS receivers effectively, this paper proposes a novel retransmitted jamming of GPS receivers. The jamming source receives several symbol duties of GPS signals, and calculates the delay time according to the distance between GPS satellite, GPS receiver and jamming source, and then amplifies the signal and transmit it to the GPS receiver to implement jamming strategy. Simulation and analysis indicate that the novel retransmitted jamming may achieve a gain of 13dB～23dB, compared with white noise jamming, under different background white noises of different intensities, which greatly saves the jamming power.
出处
《电子科技》
2006年第4期67-70,共4页
Electronic Science and Technology
