我只是在與竇性波的調製作鬥爭。 我得到了一個頻率(來自數據 - 隨時間變化),現在我需要繪製頻率相應的正弦波。得到了頻率,需要在python中的竇性竇波
藍線是剛剛繪製的實際數據點和綠色是我做的到現在,但它不會與真實數據corespond可言。
代碼繪製正弦波是底部:
def plotmodulsin():
n = 530
f1, f2 = 16, 50 # frequency
t = linspace(6.94,8.2,530)
dt = t[1] - t[0] # needed for integration
print t[1]
print t[0]
f_inst = logspace(log10(f1), log10(f2), n)
phi = 2 * pi * cumsum(f_inst) * dt # integrate to get phase
pylab.plot(t, 5*sin(phi))
振幅矢量:
[2.64,-2.64,6.14,-6.14,9.56,-9.56,12.57,-12.57, 15.55,-15.55,18.04,-18.04,21.17,-21.17,23.34,-23.34,25.86,-25.86,28.03,-28.03,30.49,-30.49,33.28,-33.28,35.36,-35.36,36.47,-36.47, 38.86,-38.86,41.49,-41.49,42.91,42.91,44.41,-44.41,45.98,-45.98,47.63,-47.63,47.63,-47.63,51.23,-51.23,51.23,-51.23,53.18,-53.18, 55.24,-55.24,55.24,-55.24,55.24,-55.24,57.43,-57.43,57.43,-57 -19.75,59.75,59.75,59.75,59.75,59.75,59.75,62.22,-62.22,59.75,59.75,62.22,62.22,59.75,59.75,62.22, -62.22,59.75,59.75,62.22,-62.22,62.22,-62.22,59.75,59.75,62.22,-62.22,62.22,-62.22,62.22,62.22,59.75,59.75,62.22,62.22,59.75, -59.75,62.22,-62.22,59.75,-59.75,59.75]
時間矢量爲真實的數據:
[6.954,6.985,7.016,7.041,7.066,7.088,7.11,7.13, 7.149,7.167,7.186,7.202,7.219,7.235,7.251,7.266,7.282,7.296,7.311,7.325,7.339,7.352,7.366,7.379,7.392,7.404,7.417,7.43,7.442,7.454, 7.501,7.513,7.524,7.536,7.547,7.558, 7.56,7.569,7.58,7.591,7.602,7.613,7.624,7.634,7.645,7.655,7.666,7.676,7.686,7.697,7.707,7.717,7.728, 7.828,7.838,7.848,7.858,7.868,7.877,7.858,7.868,7.877,7.887,7.897,7.907,7.917,7.927,7.937,7.946,7.956,7.966,7.976,7.986,7.996,8.006,8.016,8.026,8.035,8.045,8.055,8.065, 8.075,8.084,8.094,8.104,8.114,8.124,8.134,8.144,8.154,8.164,8.174,8.184,8.194,8.20]
所以我需要產生具有恆定幅度和下列頻率竇:
[10.5,16.03,20.0,22.94,25.51,27.47,29.76,31.25,32.89,34.25,35.71,37.31,38.46,39.06,40.32,41.67,42.37,4 3.1,43.86,44.64,44.64,46.3,46.3,47.17,48.08,48.08,48.08,49.02,49.02,50.0,50.0,50.0,50.0]
您繪製恆幅正弦(5)。因此,你不能指望它匹配你的數據,它有一個振幅,似乎或多或少線性增加,直到它達到60.但沒有你的數據的形式和它所代表的信息,人們不能真正決定如何適應你的數據。最好的做法是繪製一些定性上看起來相似的東西...... – jotasi
現在我需要的是將數據olny與它們的頻率進行匹配。振幅可以作爲下一步。這就是爲什麼我乘以常數。 –
我加了我的載體,如果有人可以處理呢? –