2016 Digital Communications

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Academic unit or major
Computer Science
Kasai Kenta  Fukawa Kazuhiko 
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Course description and aims

 The lecture reviews Fourier transform and inverse Fourier transform, and explains fundamentals of stochastic processes such as modulation signals. In addition, the lecture details bandpass signals and equivalent lowpass representations of the bandpass signal, and explains sampling, quantization, coding and pulse transmission for baseband transmission. Furthermore, amplitude modulation, quadrature amplitude modulation, frequency modulation, and phase modulation are discussed as modulation schemes, and students are required to learn fundamentals of these modulation schemes and theoretical performance of the demodulation.
 The lecture aims to make students completely understand basic theories and techniques of digital communications.

Student learning outcomes

The lecture aims to make students completely understand basic theories and techniques of digital communications such as fixed line and cellular phones, wired and wireless LAN, and terrestrial digital TV broadcast.


Fourier Transform, Stochastic Process, Stationary Process, Bandpass Signal, Equivalent Lowpass Signal, Amplitude Modulation, Frequency Modulation, Phase Modulation, Quadrature Amplitude Modulation, Maximum Likelihood Detection, Matched Filter

Competencies that will be developed

Specialist skills Intercultural skills Communication skills Critical thinking skills Practical and/or problem-solving skills

Class flow

After explanations using distributed documents, students are required to solve problems.

Course schedule/Required learning

  Course schedule Required learning
Class 1 Fundamentals of Electronic Communications Learn fundamentals of digital communication systems.
Class 2 Fourier Transform and Inverse Fourier Transform Review Fourier Transform and learn calculation methods of Fourier Transform.
Class 3 Bandpass Signal and Equivalent Lowpass Signal Learn bandpass signals and equivalent lowpass representations for the bandpass signals.
Class 4 Probability Density Function and Multivariate Distribution Review probabilities and learn calculation methods of the probabilities.
Class 5 Stationary Process and Bandpass Signal as a Stochastic Process Learn stationary processes to be encountered in communication systems.
Class 6 Baseband Digital Transmission Learn baseband digital transmission.
Class 7 Fundamentals of Modulation and Demodulation Learn fundamentals of modulation and demodulation.
Class 8 Amplitude Modulation and Its Demodulation Learn amplitude modulation and its demodulation.
Class 9 Quadrature Amplitude Modulation and Its Demodulation Learn quadrature amplitude modulation and its demodulation.
Class 10 Freqeuency Modulation and Its Demodulation Learn frequency modulation and its demodulation.
Class 11 Phase Modulation and Its Demodulation Learn phase modulation and its demodulation.
Class 12 Digital Modulation Learn digital modulation.
Class 13 Pulse Code Modulation Learn pulse code modulation.
Class 14 Maximum Likelihood Detection Theory Learn the maximum likelihood detection theory
Class 15 Matched Filter Learn the matched filters.


H.. Suzuki, "Basics of Digital Communications," Mathematical Engineering Inc., 2012.
T. Uyematsu and R. Matsumoto, "To Learn Basics, Communication Engineering," Ohm Press, 2012.

Reference books, course materials, etc.

Documents for the classes are distributed.

Assessment criteria and methods

Marks are based on midterm and terminal exams.

Related courses

  • ZUS.C201 : Fourier and Laplace Transforms
  • ZUS.M201 : Probability Theory and Statistics
  • ZUS.M202 : Communication Theory
  • ZUS.M302 : Algebraic Systems and Coding Theory
  • ZUS.C301 : Signal Processing
  • ZUS.M301 : Communication Network
  • ICT.A512 : Advanced Information and Communication Theory

Prerequisites (i.e., required knowledge, skills, courses, etc.)

None required

Contact information (e-mail and phone)    Notice : Please replace from "[at]" to "@"(half-width character).


Office hours

The time is not specified. You need to appoint the time for discussion by e-mail.

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