A
What will zeros(2,3) return in Matlab?
0 0 0
0 0 0
Discrete time signal is derived from continuous time signal by _____________ process
Sampling
How will u represent the signal in frequency domain?
Discrete fourier transform
FFT may be used to calculate
DFT AND IDFT
Order of an ideal LPF is
Infinite
Inverse of the Matrics exists
Only if the Matrics is Regular
Two signals are said to be in ___________, when they are 90 deg apart in Phase
Quadrature Signals
Multiplication in Time Domain will result in
Circular Convolution in Frequency Domain
mathematical model used to describe the behavior of systems that can be represented as linear equations and do not change over time.
LTI System
The process of converting samples of audio into discrete values in digital recording.
What is quantization?
State whether the following system is periodic or not. y(t) = log(sin(x(t))
No
Minimum sampling rate to avoid alising
fs=2fm (Nyquist Rate)
What is length of linear convoluted o/p
Length(input sequence) + Length(impulse response) - 1
Folded, Shifted, Multiplied and Addition of a signal is termed as
Integral Multiplication or Convolution
What is the time period of a periodic signal in actual terms?
The signals which start at t=-∞ and end at t=+∞
x(n) * h(n) = h(n) * x(n)
Commutative Property
Noise generated by an amplifier of radio is an example for?
Random Signal
What is the DFT of unit impulse sequence
X(K)=1
For an LTI discrete system to be stable, the square sum of the impulse response should be
Finite
What is the nature of the following function: y[n] = y[n-1] + x[n]?
Accumulator
x1(n) * x2(n) = IDFT( X1(K).X2(k))
Stockham's Method
What is the area of a periodic signal in a periodic interval?
It is same as the area in the previous interval or fundamental period
what is the main application of parsevals theorem?
To calculate energy
DFT of a real even input sequence is
Real and Discrete
Is the function y[n] = x[n-1] – x[n-4] memoryless?
False