About
The course serves as an introduction to the theory and practice behind many of today's communications systems. 6.450 forms the first of a two-course sequence on digital communication. The second class, 6.451, is offered in the spring.
Topics covered include: digital communications at the block diagram level, data compression, Lempel-Ziv algorithm, scalar and vector quantization, sampling and aliasing, the Nyquist criterion, PAM and QAM modulation, signal constellations, finite-energy waveform spaces, detection, and modeling and system design for wireless communication.
Recommended Citation
For any use or distribution of these materials, please cite as follows:
Robert Gallager and Lizhong Zheng, course materials for 6.450 Principles of Digital Communications I, Fall 2006.
Course Homepage: 6.450 Principles of Digital Communications I Fall 2006
Course features at MIT OpenCourseWare page: *Syllabus *Lecture Notes *Assignment *Exams *Download Course Materials
Complete MIT OCW video collection at MIT OpenCourseWare - VideoLectures.NET
Videos

Lecture 5: Markov sources and Lempel-Ziv universal codes
Apr 16, 2009
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6352 views

Lecture 16: Review; introduction to detection
Apr 16, 2009
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3804 views

Lecture 12: Nyquist theory, pulse amplitude modulation (PAM), quadrature amplitu...
Apr 16, 2009
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8621 views

Lecture 11: Signal space, projection theorem, and modulation
Apr 16, 2009
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4572 views

Lecture 2: Discrete source encoding
Apr 16, 2009
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9989 views

Lecture 22: Discrete-time baseband models for wireless channels
Apr 16, 2009
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3867 views

Lecture 3: Memory-less sources, prefix free codes, and entropy
Apr 16, 2009
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9523 views

Lecture 9: Discrete-time fourier transforms and sampling theorem
Apr 16, 2009
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5584 views

Lecture 10: Degrees of freedom, orthonormal expansions, and aliasing
Apr 16, 2009
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4168 views

Lecture 20: Introduction of wireless communication
Apr 16, 2009
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10288 views

Lecture 18: Theorem of irrelevance, M-ary detection, and coding
Apr 16, 2009
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4456 views

Lecture 4: Entropy and asymptotic equipartition property
Apr 16, 2009
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9893 views

Lecture 24: Case study — code division multiple access (CDMA)
Apr 16, 2009
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4885 views

Lecture 7: High rate quantizers and waveform encoding
Apr 16, 2009
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5138 views

Lecture 19: Baseband detection and complex Gaussian processes
Apr 16, 2009
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3863 views

Lecture 6: Quantization
Apr 16, 2009
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5778 views

Lecture 15: Linear functionals and filtering of random processes
Apr 16, 2009
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3838 views

Lecture 14: Jointly Gaussian random vectors and processes and white Gaussian noi...
Apr 16, 2009
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4930 views

Lecture 21: Doppler spread, time spread, coherence time, and coherence frequency
Apr 16, 2009
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8542 views

Lecture 23: Detection for flat rayleigh fading and incoherent channels, and rake...
Apr 16, 2009
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4293 views

Lecture 8: Measure, fourier series, and fourier transforms
Apr 16, 2009
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9398 views

Lecture 17: Detection for random vectors and processes
Apr 16, 2009
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3365 views

Lecture 1: Introduction: A layered view of digital communication
Apr 16, 2009
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20226 views

Lecture 13: Random processes
Apr 16, 2009
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6460 views