周期信号加上白噪声，通过在matlab中，用XCORR函数，求出周期信号，干扰信号，和观测信号的自相关函数，三者互相进行比较-Periodic signal plus white noise in matlab by using XCORR function, the autocorrelation function of a periodic signal is obtained, the interference signal, and the observed signals, compa

航天器动力学MATLAB程序，考虑大气阻力，估计神舟飞船每运行一个周期，轨道高度下降多少-Spacecraft Dynamics MATLAB program, consider the atmospheric drag, estimated that the Shenzhou spacecraft each run a cycle, the number of orbital altitude drop