The BRADLEY DEPARTMENT of ELECTRICAL and COMPUTER ENGINEERING

ECE 3614 Introduction to Communication Systems | ECE | Virginia Tech

Undergraduate PROGRAMS

Course Information

Description

Analysis and design of communication systems with an emphasis on digital communications based on time and frequency domain analysis. Fourier transform techniques, linear systems, and filtering are reviewed. Power and energy spectral density of communication signals. Sampling and quantization of analog signals. Baseband and binary bandpass digital modulation including line coding, pulse shaping, and both pulse and carrier modulation techniques. Wireless communication system concepts including link budgets and multiple access. Transmitter and receiver design concepts. Signal-to-noise ratio, bit error rate, and their relationship. Analog techniques such as Amplitude Modulation (AM) and Frequency Modulation (FM) radio will be reviewed for conceptual and comparative purposes.

Why take this course?

Electronic Communication is a major and growing discipline and impacts every major area of electrical engineering. This course provides the basic concepts for analyzing communication systems including an introduction to spectral analysis, modulation, signal-to-noise ratio (SNR), and bit error rate. These concepts are utilized throughout electrical engineering. Modifications to the course syllabus focus on digital communication, reflecting the fact that virtually all modern communication systems are digital.

Learning Objectives

  • 1. Compute the Fourier transform and the energy and power spectral densities of communications signals.
  • 2. Calculate the bandwidth and signal-to-noise ratio of a signal at the output of a linear system or filter.
  • 3. Explain the operation of basic digital communication systems (both baseband and bandpass) in both the time and frequency domains.
  • 4. Perform a block-diagram design of the transmitter and receiver for a basic digital communications system; select a digital modulation format and pulse shape to meet bit error rate and bandwidth requirements for the system.
  • 5. Evaluate the performance, in terms of bit error rate, of a digital communication link.
  • 6. Explain the concepts of link budget and multiple access as it applies to wireless communication.

Course Topics

Topic

Percentage of Course

1. Signals: Fourier Series and Fourier Transform 10%
2. Systems: Linear Systems and Filtering, Energy and Power Spectral Density, Bandwidth 10%
3. Sampling and Pulse Coded Modulation: Sampling Theorem, Quantization 15%
4. Probability, Noise, Signal-to-Noise Ratio, Bit Error Rate 10%
5. Baseband Digital Communications: Line Coding, Pulse Shaping 20%
6. Binary Bandpass Digital Communications 20%
7. Relationship between Analog and Digital Modulation 10%
8. Wireless Communications Concepts: Link Budgets and Multiple Access 5%