一种基于多普勒改进的BDS单频观测值周跳探测与修复法
发布时间：2018-09-09 18:26
【摘要】：针对多普勒探测法对小周跳探测精度不足的缺点,提出一种改进的北斗系统(BDS)单频观测值周跳探测法.首先,利用多普勒观测值检测时,使用固定窗口滑动的方式对初始数个历元的多普勒值进行拟合得到拟合曲线,接着对拟合曲线进行积分得到多普勒变化量,然后用多普勒变化量与载波相位进行周跳探测,最后以高次差的方式将前后历元探测出的值进行历元求差,差值为最后探测出的周跳值.对实测BDS数据进行周跳探测,试验证明:改进的多普勒周跳探测法探测小周跳的能力明显增强,具有方法简单、可靠等优点,探测精度可达0.1周且修复效果较优.
[Abstract]:Aiming at the shortcomings of Doppler detection method for detecting small cycle slip, an improved method for detecting cycle slip of (BDS) single frequency observation value in Beidou system is proposed. First of all, when the Doppler observations are detected, the Doppler values of the initial several epochs are fitted by sliding through a fixed window, and then the Doppler variation is obtained by integrating the fitting curves. Then the cycle slip is detected by Doppler variation and carrier phase, and the difference between the detected values of each epoch is calculated by high order difference, which is the last detected cycle slip. The cycle slip detection of the measured BDS data shows that the improved Doppler cycle slip detection method has the advantages of simple and reliable detection, the accuracy of detection can reach 0.1 cycles and the effect of repairing is better than that of the improved Doppler cycle slip detection method.
【作者单位】： 桂林电子科技大学信息与通信学院;
【基金】：国家自然科学基金项目(61263028) 桂林电子科技大学研究生教育创新计划项目(2016YJCX14)资助
【分类号】：P228.4
[Abstract]:Aiming at the shortcomings of Doppler detection method for detecting small cycle slip, an improved method for detecting cycle slip of (BDS) single frequency observation value in Beidou system is proposed. First of all, when the Doppler observations are detected, the Doppler values of the initial several epochs are fitted by sliding through a fixed window, and then the Doppler variation is obtained by integrating the fitting curves. Then the cycle slip is detected by Doppler variation and carrier phase, and the difference between the detected values of each epoch is calculated by high order difference, which is the last detected cycle slip. The cycle slip detection of the measured BDS data shows that the improved Doppler cycle slip detection method has the advantages of simple and reliable detection, the accuracy of detection can reach 0.1 cycles and the effect of repairing is better than that of the improved Doppler cycle slip detection method.
【作者单位】： 桂林电子科技大学信息与通信学院;
【基金】：国家自然科学基金项目(61263028) 桂林电子科技大学研究生教育创新计划项目(2016YJCX14)资助
【分类号】：P228.4
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