摘要
针对以往开展的卫星导航接收机在回路抗干扰测试试验和半实物仿真中卫星信号模拟器引入的定位误差和信号传播时延带来的仿真精度较低的问题,提出一种卫星信号模拟器定位误差与信号传播时延修正方法。利用卫星信号模拟器数学仿真出的伪距值减去发射天线到被试卫星导航接收机之间的距离值得到修正后的伪距值,用其作为解算基准值进行卫星导航信号模拟,很好地避免了伪距误差的引入,消除了信号传播时延,大幅提升了仿真测试精度,实验结果进一步验证了上述方法具有很好的试验效果。
Aiming at the problem of low simulation accuracy caused by positioning errors and signal propagation delays introduced by satellite signal simulators in previous anti-interference testing and semi physical simulation of satellite navigation receivers,a method for correcting positioning errors and signal propagation delays in satellite signal simulators is proposed.The pseudo range value obtained by mathematical simulation using a satellite signal simulator is subtracted from the distance value between the transmitting antenna and the tested satellite navigation receiver to obtain the corrected pseudo range value,which is used as the reference value for satellite navigation signal simulation.This effectively avoids the introduction of pseudo range errors,eliminates signal propagation delays,and greatly improves simulation testing accuracy.The experimental results further verify that the above method has good experimental effect.
作者
张翔
焦鹏
闫俊良
张林
ZHANG Xiang;JIAO Peng;YAN Jun-liang;ZHANG Lin(Xi'an Institute of Modern Control Technology,Xian Shaanxi 710000,China;National University of Defense Technology,Changsha Hunan 410003,China)
出处
《计算机仿真》
2024年第12期67-72,共6页
Computer Simulation
关键词
卫星导航
定位误差
时延
伪距
Satellite navigation
Positioning error
Propagation delay
Pseudorange
