DIGITAL SIGNAL PROCESSING EC2302 ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER

OBJECTIVES: 
• To study DFT and its computation 
• To study the design techniques for digital filters 
• To study the finite word length effects in signal processing 
• To study the non-parametric methods of power spectrum estimations 
• To study the fundamentals of digital signal processors. 

UNIT I DISCRETE FOURIER TRANSFORM 
DFT and its properties, Relation between DTFT and DFT, FFT computations using Decimation in time and Decimation in frequency algorithms, Overlap-add and save methods 

UNIT II INFINITE IMPULSE RESPONSE DIGITAL FILTERS
Review of design of analogue Butterworth and Chebyshev Filters, Frequency transformation in analogue domain - Design of IIR digital filters using impulse invariance technique - Design of digital filters using bilinear transform - pre warping - Realization using direct, cascade and parallel forms. 

UNIT III FINITE IMPULSE RESPONSE DIGITAL FILTERS 
Symmetric and Antisymmetric FIR filters - Linear phase FIR filters - Design using Hamming, Hanning and Blackmann Windows - Frequency sampling method - Realization of FIR filters - Transversal, Linear phase and Polyphase structures. 

UNIT IV FINITE WORD LENGTH EFFECTS  
Fixed point and floating point number representations - Comparison - Truncation and Rounding errors - Quantization noise - derivation for quantization noise power - coefficient quantization error - Product quantization error - Overflow error - Roundoff noise power - limit cycle oscillations due to product roundoff and overflow errors - signal scaling 

UNIT V MULTIRATE SIGNAL PROCESSING
Introduction to Multirate signal processing-Decimation-Interpolation-Polyphase implementation of FIR filters for interpolator and decimator -Multistage implementation of sampling rate conversion- Design of narrow band filters - Applications of Multirate signal processing

B.E./B.Tech. DEGREE EXAMINATION NOVEMBER/DECEMBER 2010 
 Fifth Semester 
 Electronics and Communication Engineering 
 EC 2302 — DIGITAL SIGNAL PROCESSING

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DIGITAL SIGNAL PROCESSING EC2302 ANNA UNIVERSITY PREVIOUS YEAR QUESTION PAPER Reviewed by Rejin Paul on 8:18 AM Rating: 5

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