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Spectrum Analysis 1 Population Spectrum A random variable Yt, which follows weak stationary process, can be represented [120]
Spectrum Analysis 1 Population Spectrum A random variable Yt, which follows weak stationary process, can be represented as a weighted sum of cos(!t) and sin(!t), letting! be a certain frequency. The form of this represantation is Yt = + Z 0 (!)cos(!t)d! + Z 0 (!)sin(!t)d! The basic idea of spectral analysis is to measure how important different frequencies are to explain the changing of Yt. All of the weak stationary process has the two form of representation; frequency domain represantation an..]]>