EE5410 Signal Processing Semester A 2022-2023 Assignment 2
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EE5410 Signal Processing
Semester A 2022-2023
Assignment 2
Due Date: 11 November 2022
1. Consider a discrete-time linear time-invariant (LTI) system with input and
output . When , the output is:
(a) Determine the transfer function and its region of convergence (ROC).
(b) Determine the difference equation that relates and .
(c) Determine the system impulse response .
(d) Determine the discrete-time Fourier transform (DTFT) of .
2. A discrete-time system with input and output , satisfies the following difference equation:
(a) Determine the system transfer function.
(b) Find all pole and zero locations.
(c) Determine all possible forms of the system impulse response .
3. The following difference equation describes a discrete-time causal system with input and output :
(a) Show that the system is an all-pass system. Note that for an all-pass system
with frequency response , is identical for all frequencies.
(b) Consider that the input has finite energy such that
Determine the energy of the output , i.e., .
4. Consider a causal and linear-phase finite impulse response (FIR) filter of length 4 such that and . It is known that the magnitude of the filter frequency response is at , while
at . Determine all possible values of and .
5. Consider a causal LTI system whose system function is
can be realized as cascade of first-order systems with or without canonic
6. Figure 1 shows the block diagram representation of a causal LTI discrete-time system with input and output .
Figure 1
(a) Determine the system transfer function
are the transforms of and
(b) Draw the block diagram representation of the system using canonic form .
(c) Is the system stable? Explain your answer.
7. Consider an ideal bandpass filter whose frequency response in
is:
where and .
(a) Use the window method with rectangular window to design a causal and linear-
phase FIR filter of length 5 that approximates Write down the filter
transfer function with numerical values.
(b) When implementing the FIR filter with transfer function , determine the
minimum numbers of multiplication and addition for computing each output
sample. Write down the corresponding difference equation with input and
output .
2022-09-18