EC2302 DIGITAL
SIGNAL PROCESSING
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AIM
To study the signal processing methods and processors.
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 9
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: 9
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 9
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 9
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 9
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.
L: 45, T: 15, TOTAL= 60 PERIODS
TEXT BOOKS:
1. John G Proakis and Manolakis, " Digital Signal
Processing Principles, Algorithms and Applications", Pearson, Fourth
Edition, 2007.
2. S.Salivahanan, A. Vallavaraj, C. Gnanapriya, Digital Signal
Processing, TMH/McGraw Hill International, 2007
REFERENCES:
1.
E.C. Ifeachor and B.W. Jervis, " Digital signal
processing - A practicalapproach",Second edition, Pearson, 2002.
2.
S.K. Mitra, Digital Signal Processing, A Computer Based
approach, Tata Mc GrawHill, 1998.
3. P.P.Vaidyanathan, Multirate Systems & Filter Banks,
Prentice Hall, Englewood cliffs, NJ, 1993.
4. Johny R. Johnson, Introduction to Digital Signal
Processing, PHI, 2006.
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