Digital Signal Processing Correlation Discrete Time Signals Online Exam Quiz
Digital Signal Processing Correlation Discrete Time Signals GK Quiz. Question and Answers related to Digital Signal Processing Correlation Discrete Time Signals. MCQ (Multiple Choice Questions with answers about Digital Signal Processing Correlation Discrete Time Signals
The normalized auto correlation ?xx(l) is defined as _____________
Options
A : frac{r_{xx}(l)}{r_{xx}(0)}
B : –frac{r_{xx}(l)}{r_{xx}(0)}
C : frac{r_{xx}(l)}{r_{xy}(0)}
D : None of the mentioned
What is the relation between cross correlation and auto correlation?
Options
A : |rxy(l)|=sqrt{r_{xx}(0).r_{yy}(0)}
B : |rxy(l)|?sqrt{r_{xx}(0).r_{yy}(0)}
C : |rxy(l)|?sqrt{r_{xx}(0).r_{yy}(0)}
D : |rxy(l)|?sqrt{r_{xx}(0).r_{yy}(0)}
What is the energy sequence of the signal ax(n)+by(n-l) in terms of cross correlation and auto correlation sequences?
Options
A : a2rxx(0)+b2ryy(0)+2abrxy(0)
B : a2rxx(0)+b2ryy(0)-2abrxy(0)
C : a2rxx(0)+b2ryy(0)+2abrxy(1)
D : a2rxx(0)+b2ryy(0)-2abrxy(1)
If x(n) is the input signal of a system with impulse response h(n) and y(n) is the output signal, then the auto correlation of the signal y(n) is?
Options
A : rxx(l)*rhh(l)
B : rhh(l)*rxx(l)
C : rxy(l)*rhh(l)
D : ryx(l)*rhh(l)
Which of the following is the auto correlation of x(n)?
Options
A : rxy(l)=x(l)*x(-l)
B : rxy(l)=x(l)*x(l)
C : rxy(l)=x(l)+x(-l)
D : None of the mentioned
Which of the following relation is true?
Options
A : ryx(l)=h(l)*ryy(l)
B : rxy(l)=h(l)*rxx(l)
C : ryx(l)=h(l)*rxx(l)
D : none of the mentioned
Which of the following parameters are required to calculate the correlation between the signals x(n) and y(n)?
Options
A : Time delay
B : Attenuation factor
C : Noise signal
D : All of the mentioned
Auto correlation sequence is an even function.
Options
A : True
B : False
C :
D :
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