CS2403 DIGITAL SIGNAL PROCESSING Lecture Notes for IT - Fifth (5th) semester & for CSE - Seventh (7th) semester
CS2403 Lecture Notes
UNIT I SIGNALS AND SYSTEMS
Basic elements of DSP – concepts of frequency in Analog and Digital Signals – sampling
theorem – Discrete – time signals, systems – Analysis of discrete time LTI systems – Z
transform – Convolution (linear and circular) – Correlation.
UNIT II FREQUENCY TRANSFORMATIONS
Introduction to DFT – Properties of DFT – Filtering methods based on DFT – FFT
Algorithms Decimation – in – time Algorithms, Decimation – in – frequency Algorithms –
Use of FFT in Linear Filtering – DCT.
UNIT III IIR FILTER DESIGN
Structures of IIR – Analog filter design – Discrete time IIR filter from analog filter – IIR
filter design by Impulse Invariance, Bilinear transformation, Approximation of derivatives
– (HPF, BPF, BRF) filter design using frequency translation
UNIT IV FIR FILTER DESIGN
Structures of FIR – Linear phase FIR filter – Filter design using windowing techniques,
Frequency sampling techniques – Finite word length effects in digital Filters
UNIT V APPLICATIONS
Multirate signal processing – Speech compression – Adaptive filter – Musical sound
processing – Image enhancement.