摘要
建立了广播式自动相关监视信号S模式的数学模型,分析了到达时间(TOA)估计算法中上升沿测量算法、最优估计测量算法的实现过程和理论精确度。首先,推导验证了单脉冲差分匹配滤波器的理论实现,从脉冲积累角度分析了多脉冲差分匹配滤波器测量TOA的改进算法。然后,针对工程实际中硬件采样带来的估计点时间离散问题,采用多项式拟合算法减小TOA估计误差。最后,仿真分析了各算法的TOA估计性能,并结合定位算法验证了不同算法应用于多点定位系统的有效性。
In this paper,the mathematical model of the S-mode of an automatic dependent surveillance-broadcast signal is established,and the realization process and theoretical accuracy of the rising edge and optimal estimation measurement algorithms in the time of arrival(TOA)estimation algorithm are analyzed.First,the theoretical implementation of the singlepulse differential matched filter is deduced and verified,and the improved algorithm of the multipulse differential matched filter for TOA measurement is analyzed based on pulse accumulation.Then,a polynomial fitting algorithm is proposed to reduce the TOA estimation error to solve the time discretization problem caused by hardware sampling in engineering practice.Finally,the TOA estimation performance of each algorithm is analyzed using simulation,and the effectiveness of different algorithms applied to the multilateration system is verified by combining them with the positioning algorithm.
作者
宫峰勋
李孟然
Gong Fengxun;Li Mengran(College of Electronical Information and Automation,Civil Aviation University of China,Tianjin 300300,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2022年第13期119-128,共10页
Laser & Optoelectronics Progress
基金
国家重点研发计划(2018YFC0809500)。
