The navigation and velocity measurement methods using GPS (global positioning system) signals based on a side-mounted single patch antenna are key technologies of the trajectory correction projectile. However, when the single patch antenna on the projectile receives the GPS signals at a high spin rate, there are effects such as the periodic Doppler shift induced by the rotation and crystal oscillator frequency offset, and periodic blockage that interferes with the measurement of the projectile’s velocity. By analyzing the characteristics of the Doppler frequency of carrier and pseudorange rate, we propose a velocity measurement method using pseudorange rate to separate crystal oscillator frequency offset-induced Doppler shift and estimate the velocity for high-spinning projectiles by optimization. This method eliminates hazardous frequency induced by rotation and facilitates precise velocity measurement. The method has been verified through testbed experiments. The experimental results show that after eliminating hazardous Doppler frequency under high spin rate conditions, the root mean square error (RMSE) of velocity measurement was 0.42 m/s, which meets the requirements for velocity measurement in trajectory correction projectiles.

基于侧装单片天线的GPS（全球定位系统）信号导航和测速方法是弹道修正弹的关键技术。然而，当弹丸上的单贴片天线以高旋转速率接收GPS信号时，会产生旋转和晶体振荡器频率偏移引起的周期性多普勒频移以及干扰弹丸测量的周期性阻塞等效应。速度。通过分析载波多普勒频率和伪距率的特点，提出了一种利用伪距率来分离晶振频偏引起的多普勒频移并优化估计高旋转弹丸速度的方法。该方法消除了旋转引起的危险频率，并有利于精确的速度测量。该方法已通过台架实验得到验证。实验结果表明，消除高自旋速率条件下的危险多普勒频率后，测速均方根误差(RMSE)为0.42 m/s，满足弹道修正弹测速要求。