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Communications 1


Course Content

Bandwidth; linear modulation circuits; angle modulation circuits; phased-locked loop; pulse modulation circuits; multiplexing; noise

Course Outline

INTRODUCTION TO ELECTRONIC COMMUNICATIONS SYSTEMS

  1. Introduction
  2. The Electromagnetic Spectrum
  3. Bandwidth and Information Capacity
  4. Transmission Modes
  5. Circuit Arrangements
  6. Signal Analysis
  7. Mixing

DECIBELS and NOISE

  1. Signal Magnitudes and Ranges
  2. dB Calculation Examples
  3. dB Reference Values
  4. System Measurements with dB
  5. dB and Bandwidth
  6. External noise
  7. Atmospheric Noise
  8. Extraterrestrial Noise
  9. Industrial Noise
  10. Internal Noise
  11. Thermal Agitation Noise
  12. Shot Noise
  13. Transit-time Noise
  14. Miscellaneous Noise
  15. Noise Calculations
  16. Addition of Noise due to Several Sources
  17. Addition of Noise due to several amplifiers in cascade
  18. Noise in Reactive Circuits
  19. Noise Figure
  20. Signal-to-Noise Ration
  21. Definition of Noise Figure
  22. Calculation of Noise Figure
  23. Noise Figure from Equivalent Noise resistance
  24. Noise Temperature

AMPLITUDE MODULATION

  1. AM Theory
  2. Frequency Spectrum of AM wave
  3. Representation of AM
  4. Power Relations in AM wave
  5. Generation of AM
  6. Basic Requirements--Comparison of levels
  7. Grid-modulated class C amplifier
  8. Plate-modulated class C amplifier
  9. Modulated Transistor Amplifier
  10. Amplitude Modulation Transmission

SINGLE-SIDEBAND COMMUNICATIONS SYSTEMS

  1. Evolution and Description of SSB
  2. Suppression of Carrier
  3. Suppression of Unwanted Sideband
  4. Extensions of SSB
  5. Forms of Amplitude Modulation
  6. Carrier Insertion--Pilot-Carrier systems
  7. Independent-sideband (ISB) systems
  8. Vestigial Sideband Transmission

FREQUENCY MODULATION

  1. Description of Systems
  2. Mathematical Representation of FM
  3. Frequency Spectrum of the FM wave
  4. Phase Modulation
  5. Intersystem Comparisons
  6. Effects of Noise on carrier--noise triangle
  7. Pre-emphasis and de-emphasis
  8. Other forms of interference
  9. Comparison of wideband and narrowband FM
  10. FM methods
  11. Direct methods
  12. Indirect Method

MULTIPLEXING

Download a Powerpoint presentation on Multiplexing

  1. Introduction
  2. Time-Division Multiplexing
  3. T1 Digital Carrier System
  4. CCITT Time Division Multiplexed Carrier System
  5. Codec
  6. Combo Chips
  7. NA Digital Hierarchy
  8. Line Encoding
  9. T Carriers
  10. Frame Synchronization
  11. Bit Interleaving vs Word Interleaving
  12. Frequency-Division Multiplexing
  13. AT & T's FDM Hierarchy
  14. Composite Baseband Sugnal
  15. Formation of a Mastergroup
  16. Hybrid Data

PULSE MODULATION

  1. Introduction
  2. Frequency-Shift Keying (FSK)
  3. On-Off Keying (OOK)
  4. Amplitude-Shift Keying (ASK
  5. Phase-Shift Keying(PSK)
  6. Quadrature-AMplitude Modulation

PHASED-LOCK LOOP

  1. Introduction

Prerequisite:

PROBABILITY AND STATISTICS


 Transmission Lines, Wave Propagation, Antenna and Waveguide
 Optical Fiber (PowerPoint Presentation)
 Amplitude Modulation Multiple Choice Questions with Answer
 Angle Modulation Multiple Choice Questions with Answer

REFERENCES:



Last updated: Saturday, March 1, 2008, 04:33 PM