伪卫星增强系统参考站接收机的测距偏差及优化

伪卫星相对地面用户是静止的,因此卫星与参考站接收机之间的距离几乎是不变的。在这种情况下,采样和量化引入的误差不再服从高斯分布,从而影响接收机的测量精度。为了解决这一问题,建立了卫星导航接收机的离散数字信号模型,并在此基础上分析了采样和量化对测距偏差的影响,通过仿真验证了结论的正确性,并提出了伪卫星增强系统下参考站接收机的优化设计方法。

Optimization and ranging deviation of reference station receivers under pseudolite augmentation system conditions

Unlike navigation satellite is always in high-speed motion, the pseudo-satellite is stationary relative to the ground user, so for ground reference station receivers, the distance between the satellite and the receiver is almost constant. In this case, the error introduced by sampling and quantization is no longer Gaussian distribution, so it can affect the measurement accuracy of the receiver. Buid the discrete digital signal model of satellite navigation receiver, then analysze the influence of sampling and quantization of the receiver location deviation at satellites and users are relatively static conditions, the correctness of the conclusion is verified by simulation, finally, the optimization design method of the reference station receiver in the pseudolite enhancement system is proposed.