DSP___Unit-yes it is book read well1.ppt

Yes read

1. Digital Signal Processing
Prof. V. N. Bhonge
Dept. of Electronics & Telecomm.
Shri Sant Gajanan Maharaj College of Engg,
Shegaon –444203
[email protected]

2. SSGMCE
Shegaon
Prof. V. N. Bhonge Dept. of E & T
DIGITAL SIGNAL PROCESSING
(6ET4 )
UNIT-I:
Discretetimesignalsandsystem:Classificationofsignals,singularityfunction,
amplitudeandphasespectra,simplemanipulation,Classificationofsystems,
representationsofsystems,analogtodigitalconversionofsignal.(10)
UNIT-II:
Z-transform:mappingofs-planetoZ-plane,RegionofConversionandits
properties,PropertiesofZ-transform,evaluationofinverseZ-transformusinglong
divisionmethod,PFEmethodandresiduemethod,differenceequationandits
relationwithsystemfunction,impulseresponseandfrequencyresponse.(9)
UNIT-III:
DiscreteandFastFourierTransform:Discreteconvolution,DiscreteTimeFourier
Transforms(DTFT),FastFourierTransform(FFT),ComputinganInverseDFTby
DoingaDirectDFT.Fastconvolution,correlation.(9)

3. SSGMCE
Shegaon
Prof. V. N. Bhonge Dept. of E & T
UNIT-IV:
FiniteImpulseResponse(FIR)filters:MagnitudeandPhaseresponseofdigital
filter,FrequencyResponseoflinearphaseFIRfilter,DesigntechniquesforFIR
filter:Fourierseriesmethod,windowingmethodusingRectangularwindow,
Halfbanddigitalfilter.RealizationofbasicstructureFIRsystem:Directform,
Cascade,linearphase.(8)
UNIT-V:
InfiniteImpulseResponse(IIR)filters:IIRfilterdesignbyapproximationof
derivatives,impulseinvariantmethod,Bilineartransformationmethod,
ButterworthfilterandChebyshevfilter.RealizationofbasicstructureIIR
system:DirectformI,DirectformII,Cascadeandparallel.(8)
UNIT-VI:
MultirateDigitalSignalProcessing:Sampling,Samplingrateconversion,signal
flowgraph,filterstructure,polyphasedecomposition,digitalfilterdesign,
multilevelfilterbank.OverviewandarchitectureofDSPprocessor
TMS320C54XX.(8)

4. SSGMCE
Shegaon
Prof. V. N. Bhonge Dept. of E & T
TEXT BOOKS :
1.S. Salivahanan, A. Vallavaraj, “Digital Signal Processing”, Tata
McGraw-Hill Education, 2001.
REFERENCE BOOKS :
1.Oppenheim & Schafer, “Discrete time Processing”, PHI.
2.Proakis& ManolakisD.G., “Digital Signal Processing”, PHI.
3.MitraS.K., “Digital Signal Processing”, TMH.
4.Roman Kuc, “Digital Signal Processing”, MGH.
5.IfeacherE.C., Jervis B. W., “Digital Signal Processing”,
Addison Wesley.
6.P. P. Vaidyanathan, “DSP and MultirateSystems”, PHI.

5. SSGMCE
Shegaon
Prof. V. N. Bhonge Dept. of E & T
Introduction to DSP’s
•DSP’sprocesssignals
•Signal–adetectablephysicalquantityor
impulse(asavoltage,current,or
magneticfieldstrength)bywhich
messagesorinformationcanbe
transmitted(WebsterDictionary)

6. SSGMCE
Shegaon
Prof. V. N. Bhonge Dept. of E & T
•Signal Characteristics:
–Signals are Physical Quantities:
–Signals are Measurable
–Signals are Analog
–Signals Contain Information.
•Examples:
–Temperature [
o
C]
–Pressure [Newtons/m
2
] or [Pa]
–Mass [kg]
–Speed [m/s]
–Acceleration [m/s
2
]
–Torque [Newton*m]
–Voltage [Volts]
–Current [Amps]
–Power [Watts]
•In this class, analog signals are electrical.
–Sensors: are devices that convert other physical quantities (temperature,
pressure, etc.) to electrical signals.

7. SSGMCE
Shegaon
Prof. V. N. Bhonge Dept. of E & T
•DSP process digital signals:
–Analog-to-Digital Converter (ADC)
•Binary representation of the analog signal
–Digital-to-Analog Converter (DAC)
•Digital representation of the signal is converted to
continuous analog signal.
•Analog Continuous

8. ADC
x(t)
Analog
Low-pass
Filter
Sample
and
Hold
f
s
b) Amplitude Quantized Signal
x
a(nT)
x[n]
Quantizer DSP
c) Amplitude & Time Quantized –Digital Signal
a) ContinuousSignal
SSGMCE
Shegaon
Prof. V. N. Bhonge Dept. of E & TC
Dept. of E & T

9. DAC
DSP
Digital
to
Analog
Conver
ter
Analog
Low-
pass
Filter
y[n]
y(t)
y
a(nT)
c) Continuous Low-pass filtered Signalb) Analog Signala) Digital Output Signal
SSGMCE
Shegaon
Prof. V. N. Bhonge Dept. of E & TC

10. Why Processing Signals?
•Extraction of Information
–Amplitude
–Phase
–Frequency
–Spectral Content
•Transform the Signal
–FDMA (Frequency Division Multiple
Access)
–TDMA (Time Division Multiple
Access)
–CDMA (Code Division Multiple
Access)
•Compress Data
–ADPCM (Adaptive Differential Pulse
Code Modulation)
–CELP (Code Excited Linear Prediction)
–MPEG (Moving Picture Experts Group)
–HDTV (High Definition TV)
•Generate Feedback Control Signal
–Robotics (ASIMOV)
–Vehicle Manufacturing
–Process Control
•Extraction of Signal in Noise
–Filtering
–Autocorrelation
–Convolution
•Store Signals in Digital Format
for Analysis
–FFT
–…
SSGMCE
Shegaon
Prof. V. N. Bhonge Dept. of E & TC

11. Typical Architecture of a DSP System
Sensor
ADC
Analog Signal
Conditioning
Digital Signal
Conditioning
DSP DAC
Analog Signal Processing
Digital Signal Processing
SSGMCE
Shegaon
Prof. V. N. Bhonge Dept. of E & TC

12. SSGMCE
Shegaon
Prof. V. N. Bhonge Dept. of E & T
Signal Processing
Humans are the most advanced signal processors
speech and pattern recognition, speech synthesis,…
We encounter many types of signals in various applications
Electrical signals: voltage, current, magnetic and electric fields,…
Mechanical signals: velocity, force, displacement,…
Acoustic signals: sound, vibration,…
Other signals: pressure, temperature,…
Most real-world signals are analog
They are continuous in time and amplitude
Convert to voltage or currents using sensors and transducers
Analog circuits process these signals using
Resistors, Capacitors, Inductors, Amplifiers,…
Analog signal processing examples
Audio processing in FM radios
Video processing in traditional TV sets

13. SSGMCE
Shegaon
Prof. V. N. Bhonge Dept. of E & T
Limitations of Analog Signal Processing
•Accuracy limitations due to
–Component tolerances
–Undesired nonlinearities
•Limited repeatability due to
–Tolerances
–Changes in environmental conditions
•Temperature
•Vibration
•Sensitivity to electrical noise
•Limited dynamic range for voltage and currents
•Inflexibility to changes
•Difficulty of implementing certain operations
–Nonlinear operations
–Time-varying operations
•Difficulty of storing information

14. SSGMCE
Shegaon
Prof. V. N. Bhonge Dept. of E & T
Digital Signal Processing
•Represent signals by a sequence of numbers
–Sampling or analog-to-digital conversions
•Perform processing on these numbers with a digital processor
–Digital signal processing
•Reconstruct analog signal from processed numbers
–Reconstruction or
A/D DSP D/A
analog
signal
analog
signal
digital
signal
digital
signal
•Analog input –analog output
–Digital recording of music
•Analog input –digital output
–Touch tone phone dialing
•Digital input –analog output
–Text to speech
•Digital input –digital output
–Compression of a file on computer

15. SSGMCE
Shegaon
Prof. V. N. Bhonge Dept. of E & T
DSP is Everywhere
•Sound applications
–Compression, special effects, synthesis, recognition, echo cancellation,…
–Cell Phones, MP3 Players, Movies, Dictation, Text-to-speech,…
•Communication
–Modulation, coding, detection, equalization, echo cancellation,…
–Cell Phones, dial-up modem, DSL modem, Satellite Receiver,…
•Automotive
–ABS, GPS, Active Noise Cancellation, Cruise Control, Parking,…
•Medical
–Magnetic Resonance, Tomography, Electrocardiogram,…
•Military
–Radar, Sonar, Space photographs, remote sensing,…
•Image and Video Applications
–DVD, JPEG, Movie special effects, video conferencing,…
•Mechanical
–Motor control, process control, oil and mineral prospecting,…

16. Digital Telephone Communication System
Example:
SSGMCE
Shegaon
Prof. V. N. Bhonge Dept. of E & TC

17. SSGMCE
Shegaon
Prof. V. N. Bhonge Dept. of E & T
Thank You