Practical Digital Signal Processing for Engineers and Technicians
-
Upload
idc-technologies -
Category
Engineering
-
view
392 -
download
8
description
Transcript of Practical Digital Signal Processing for Engineers and Technicians
Technology Training that Workswww.idc-online.com/slideshare
Practical Digital Signal Processing for Engineers and Technicians
Technology Training that Workswww.idc-online.com/slideshare
DSP• Digital - finite set of distinct values.• Analog - continuous range of values.
• DSP Processing means processing of signals which are:- Discrete in time.
- Discrete in amplitude.
Technology Training that Workswww.idc-online.com/slideshare
Two sources of discrete signals
• Ones that are discrete in nature.
• Sampled version of a continuous-time signal.
Technology Training that Workswww.idc-online.com/slideshare
Why Process Signals Digitally?
• The signals are inherently discrete in nature.
• Consistency - compared with analog methods.
Technology Training that Workswww.idc-online.com/slideshare
Definition of Terms• Signals - A quantity that can be measured over time.• Frequency - A signal is said to have a frequency of 50 or 60 Hz.• Spectrum - Some signals have a combination of frequencies.• Low Pass Filter - This lets through the low pass component.• Bandpass Filter - Only a range of frequencies is passed through
intact.• High-pass Filter - Allows frequencies above a certain frequency to
pass through intact.
Technology Training that Workswww.idc-online.com/slideshare
Some Application Areas• Speech and Audio Processing.
- Coding.
- Synthesis.
- Recognition.
Technology Training that Workswww.idc-online.com/slideshare
Companding Process
Technology Training that Workswww.idc-online.com/slideshare
Adaptive Differential Pulse Code Modulator
Technology Training that Workswww.idc-online.com/slideshare
Linear Predictive Coding
Technology Training that Workswww.idc-online.com/slideshare
Image and Video Processing
• Image Enhancement.
• Image Restoration.
• Image Compression and Coding.
Technology Training that Workswww.idc-online.com/slideshare
Adaptive Filtering
• Noise Cancellation.
• Echo Cancellation.
• Channel Equalisation.
Technology Training that Workswww.idc-online.com/slideshare
Adaptive Noise Cancellation System
Technology Training that Workswww.idc-online.com/slideshare
Adaptive Echo Cancellation System
Technology Training that Workswww.idc-online.com/slideshare
Adaptive Equalizer in Training Mode
Technology Training that Workswww.idc-online.com/slideshare
Control Applications
• Controlling closed-loop feedback systems.
• Controller implements algebraic algorithms such as filters and compensators.
Technology Training that Workswww.idc-online.com/slideshare
Digital Closed Loop Control System
Technology Training that Workswww.idc-online.com/slideshare
Sensor or Antenna Array Processing
• Spatially distributed sensors are used for receiving signals from some sources.
• Coherent summing of outputs from these sensors referred to as beamforming.
• One can “listen” preferentially to wavefronts originating from one direction over another.
Technology Training that Workswww.idc-online.com/slideshare
Digital Communication
• New Architecture called software radio.
• Use of wideband A/D and D/A converters to convert RF or IF signals directly.
Technology Training that Workswww.idc-online.com/slideshare
Software Radio Architecture
Technology Training that Workswww.idc-online.com/slideshare
DO YOU WANT TO KNOW MORE?
If you are interested in further training or information, please visit:
http://idc-online.com/slideshare