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ENGINEERING TRIPOS PART IIB – 2012/2013 (module not running this year)
Module 4F5 - Advanced wireless communications
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Leader: |
Dr J Sayir |
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Timing: |
Lent Term |
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Prerequisites: |
3F1, 3F4 assumed, 4I4 highly recommended |
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Structure: |
16 lectures (including examples classes) |
| Assessment: | Material / Format / Timing / Marks Lecture Syllabus / Written exam (1.5 hours) / Start of Easter Term / 100 % |
AIMS
The aims of this course are to review the underlying techniques used in current and future wireless communications systems. In particular, this course will introduce the students to modern error-control coding techniques like turbo and low density parity check codes, known to approach the fundamental limits of communications with very low complexity. These codes are now employed in most upcoming communications standards. The second part of the course will introduce the students to the fundamentals of wireless communications, and in particular the concept of fading and effective techniques to mitigate its detrimental effects in communications. Examples of current systems like GSM, WiFi, WiMax and Bluetooth will be used to illustrate the various techniques introduced throughout the course.
LECTURE SYLLABUS
Digital Modulation (2 Lectures, Dr. A. Guillen i Fabregas)
- Review of digital communications and digital modulation
- The Signal Space
- Maximum a posteriori signal detection
- Error probability
- Examples of QAM modulation in current wireless systems
Error-Control Coding (6 Lectures, Dr. J. Sayir)
- Review of Information Theory: Channel Capacity
- Introduction to error control coding and review of block coding with syndrome decoding
- Error probability of coded systems and union bound
- Convolutional codes with forward backward decoding
- Turbo-codes with iterative decoding
- Low-density parity-check (LDPC) codes
- Coded Modulation
- Examples of coding in in current wireless systems
Wireless Communications (6 Lectures, Dr. A.Guillen i Fabregas)
- Wireless communications channels: multipath propagation and statistical models (Rayleigh fading)
- Digital modulation over fading channels: error probability and comparison to unfaded channels, equalisation vs. OFDM
- Diversity techniques
- Channel capacity and outage probability of fading channels
- Multiple-antenna transmission
- Multiple-user systems
Examples Classes (2 Lectures, Dr. A. Guillen i Fabregas)
OBJECTIVES
Upon completion of the modules, students should
- Understand the signal space representation of digital modulation;
- Understand the channel capacity as ultimate limit for communications;
- Understand convolutional, turbo and LDPC codes and their performances;
- Be able to implement decoders for convolutional, turbo and LDPC codes;
- Understand the wireless communication channels and the concept of fading;
- Understand the differences between wireless transmission and transmission over the Gaussian channel in terms of error probability, capacity and code performance;
- Understand the advantage of diversity techniques in wireless channels;
- Be able to implement detectors for fading channels;
- Understand the design tradeoffs of multiple-antenna transmission with respect to singleantenna transmission;
- Know what techniques are used in practical wireless systems.
REFERENCES
Please see the Booklist for Group F Courses for references for this module.
Last updated: May 2012