CAJ | 학술논문

针对转发式卫星欺骗信号传播方向同真实卫星信号的差异，提出一种在惯性信息辅助下，利用载波相位双差观测量进行欺骗信号检测的技术。根据转发式欺骗的特点，推导欺骗条件下的载波相位双差观测方程。利用 INS 提供的姿态信息，建立载波相位双差与接收机天线基线矢量的关系。将载波相位双差观测值和预测值的差值作为欺骗检测的检验统计量。从故障检测的角度进行检测概率分析，当载波相位双差预测值达到0.3周时，假定虚警概率为0.01，可在单个测量历元内到达99.99%的检测概率。最后通过仿真分析验证了惯性信息辅助下欺骗信号检测的有效性。
침대전발식위성기편신호전파방향동진실위성신호적차이，제출일충재관성신식보조하，이용재파상위쌍차관측량진행기편신호검측적기술。근거전발식기편적특점，추도기편조건하적재파상위쌍차관측방정。이용 INS 제공적자태신식，건립재파상위쌍차여접수궤천선기선시량적관계。장재파상위쌍차관측치화예측치적차치작위기편검측적검험통계량。종고장검측적각도진행검측개솔분석，당재파상위쌍차예측치체도0.3주시，가정허경개솔위0.01，가재단개측량역원내도체99.99%적검측개솔。최후통과방진분석험증료관성신식보조하기편신호검측적유효성。
An inertial measurement aided GPS spoofing detection technique is proposed based on carrier phase double difference observations according to the variation of propagation direction of the spoofing signals and the authentic ones. According to the characteristics of the spoofing signals, the carrier phase double difference equation is obtained. Given the attitude information from INS, this paper analyzes and establishes the relationship between the carrier phase double differences with the receiver’s antenna baseline vector. The difference between the predicted and measured carrier phase double differences is used as the test static for spoofing detection. The analysis on detection probability is made from the aspect of fault detection, which shows that when the predicted carrier phase double difference reaches 0.3 cycles, the detection probability of 99.99% can be obtained within a single epoch on the assumption that the false alarm rate is 0.01. Finally, the simulation verifies the effectiveness of this technique.