- 搜标题
- 搜题干
- 搜选项
单项选择题
Which correlation property makes filtering white noise by autocorrelation possible?
A．When τ=0，the autocorrelation function has the maximum value
B．The autocorrelation function of a periodic signal is still a periodic signal of the same frequency, but it does not retain the phase information of the original signal
C．The autocorrelation function of the random noise signal will decay rapidly as τ increases
D．Two periodic signals with different frequencies are not correlated to each other
B．The autocorrelation function of a periodic signal is still a periodic signal of the same frequency, but it does not retain the phase information of the original signal
C．The autocorrelation function of the random noise signal will decay rapidly as τ increases
D．Two periodic signals with different frequencies are not correlated to each other
