Bhavnagar University 2007 B.Sc Computer Science DIGITAL SIGNAL PROCESSING - Question Paper

DIGITAL SIGNAL PROCESSING

Time: three hrs
Max Marks: 70

First ques. is Compulsory

ans any 4 from the remaining ques.

All ques. carry equal marks

ans all parts of any ques. at 1 place

1. a) Are the subsequent systems CAUSAL?
y(n) = x(n) + 0.25 x(n-1) + 0.5 x(n-2)
y(n) = x(n+1) - 0.5 x(n-1) + 0.8 x(n-1)
b) What is the number of multiplications needed for performing the convolution of 2 sequences with identical length eight using the direct method?
c) elaborate the special addressing modes in Programmable DSPs?
d) elaborate the different units current in TMS32OCX CPU?
e) What is the use of guard bits in accumulators?
f) Which of the subsequent instructions has an operand of length 3-bits in
TMS32OC54X DSP? LLD #05,ARP AND #1234h,A,A
g) elaborate pipeline latencies in C54X DSP?

2 .a) Determine the impulse response coefficients of a digital LP filter with H (ejw)=1, for
? < ?c and, H (ejw)=0 for ? < ?c < p
b) Show how the computational complexity of an FIR filter of order 21 can be decreased by using 3 polyphase filters.

3 .a) Disitinguish among Von Neumann, Harward and replaced Harward architecture for the computer. Which architecture is preferred for DSp applications and why?
b) discuss the operation of TDM serial ports in Programmable DSPs.

4. discuss the internal architecture of TMS32OC3X using its functional block diagram.

5. a) define various addressing modes with examples for TMS32OCX DSP
b) Write TMS32OC3X assembly language program for generation of Fabonocci series.

6. a) What is the use of the subsequent registers of TMS32OC54X DSP: T, TRN, BIC, XPC
b) discuss the operation of CSSU of TMS32OC54X and discuss its use with an application

7.a) discuss the operation of parallel instructions of TMS32OC54X
b) Write a TMS32054X assembly language program to obtain the sum of the series 1+2+3+........1000

8. Write short notes on the subsequent
a) FIR Filters b)Multiported Memory
c) ALU of TMS32OC54X d) Code Composer Studio

Earning:   Approval pending.