考察序列

x(n)=cos(0.48*pi*n)+cos(0.52*pi*n)



a．0≤n≤10时，用DFT估计 的频谱；将 补零加长到长度为100点序列用DFT估计 的频谱。要求画出相应波形。

b．0≤n≤100时，用DFT估计 的频谱，并画出波形。-Inspection sequence

x(n)=cos(0.48*pi*n)+cos(0.52*pi*n)



A. 0 n 10 or less, or less using DFT spectrum estimation Will fill with zero length to the length of 100 point sequence DFT spectrum estimation.Draw the corresponding waveform requirement.

B. 0 n 100 or less, or less using DFT spectrum estimation, and draw the waveform.