应用使发射信号和接收信号之间的差平方积分值为最小的准则,讨论了估算目标位置最小误差的表达式,建立了发射信号和接收信号加噪声的互相关函数;并假设目标距离已知,估算了目标的相对径向速度;最后得出时间误差和信号的频率范围成反比的结论。 By applying the criterion of minimizing the square integral of the difference between the transmitted signal and the received signal, the expression of estimating the minimum error of the target position is discussed, and the cross-correlation function between the transmitted signal and the received signal plus noise is established. Assuming that the target distance is known , The relative radial velocity of the target is estimated. Finally, the conclusion is drawn that the time error is inversely proportional to the frequency range of the signal.