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Syllabus for

Academic year
ESS036 - Wireless communications
 
Owner: EMAST
6,0 Credits (ECTS 9)
Grading: TH - Five, Four, Three, Not passed
Level: A
Department: 0739 - Signaler och system E


Teaching language: English

Course module   Credit distribution   Examination dates
Sp1 Sp2 Sp3 Sp4 No Sp
0101 Examination 6,0 c Grading: TH   3,0 c 3,0 c   25 May 2004 am M,  Contact examiner

In programs

EMAST MSc PROGR. IN DIGITAL COMMUNICATION SYSTEMS AND TECHNOLOGY, Year 1 (compulsory)
TTFYA ENGINEERING PHYSICS, Year 4 (elective)
TITEA INFORMATION ENGINEERING, Year 3 (elective)
COMAS MSc PROGRAMME IN HARDWARE FOR WIRELESS COMMUNICATIONS, Year 1 (elective)
TDATA COMPUTER SCIENCE AND ENGINEERING - Communications System, Year 4 (elective)
TDATA COMPUTER SCIENCE AND ENGINEERING, Year 3 (elective)
TDATA COMPUTER SCIENCE AND ENGINEERING - Embedded computer systems engineering, Year 4 (elective)
TELTA ELECTRICAL ENGINEERING, Year 4 (elective)

Examiner:




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Eligibility:

For single subject courses within Chalmers programmes the same eligibility requirements apply, as to the programme(s) that the course is part of.

Course specific prerequisites

Basic knowledge in digital communications similar to what is given in Digital Communications (ESS140) is required. It is also an advantage to have some basic knowledge of stochastic processes.

Aim

The course aims to give knowledge of some of the most fundamental methods used in the design of radio systems. It also aims at understanding how performance is influenced by the used algorithms. A good knowledge of the properties of the radio channel is the condition for this. A third aim is the understanding of how the algorithms work together in a complete system for radio communication and the knowledge of methods for analysing this.

Content

Transmission of digital information is today very common. Every time you use a cash dispenser e.g., you use a communications link between the dispenser and the bank. The most widely used communication systems are the networks for public telephony and mobile (cellular) telephony, and the Internet. The most common medium for transmission is cable, but the use of radio waves increases due to the in­creased flexibility of avoiding cables. In many cases it is also cheaper to deploy and maintain wireless systems. The challenge with a radio sys­tem is the need for bandwidth, which is in conflict with the need for high speed applications such as Internet browsing.
A system for radio communication inclu­des many different components like protocols, source coding, chan­nel coding, modulation methods, multiple access schemes, equalization, decoding, and fre­quency assignment. In order to understand and analyse a radio system for communication it is also necessary to know some of the inherent properties of the transmission medium.

Contents

Wireless communication systems; services, systems, frequency planning.
Cellular radio; components, architecture, measures of performance, demands of performance.
Path loss models; attenuation, coverage, statistical models, link budget.
Multipath propagation; time dispersion, doppler, coherence bandwidth, fading, fading simulation.
Digital modulation; constant amplitude modulation, spread spectrum methods, channel coding, interleaving.
Diversity; antenna separation, combinational methods, SNR performance, BER, RAKE receivers.
Channel access methods; FDMA, TDMA, CDMA, duplex, packet switching, capacity.
CDMA systems: direct-sequence spread spectrum, spreading codes, transmitter design, receiver design, bit error probability, near-far effect, capacity, Rake receiver, soft handover, power control, frequency-hopping.
Standardized Systems; GSM, Qualcomm CDMA, WCDMA.

Organisation

Lectures on the topics given under contents.

Projects

The course includes two projects to be done in groups of 2 students. In the first, the channel simulator that is constructed in a lab exercise, is used to simulate the bit error probability of a digital communication system on a simulated radio channel. The project is done using MATLAB and code for transmitter and receiver is written during the project.
In the second project a DS-CDMA system with multiuser detection is studied. Signals are transmitted on a simulated channel. In the project, it is demonstarted that each user signal can be detected in various ways from the received composite signal.

Laborative exercises
The course contains one lab of 4 hours. It is devoted to the construction of a channel simulator using MATLAB. The performance of the simulator is analysed and compared with the theoretical analysis presented during the lectures. The resulting code is also used for the first project.

Literature

Currently it is Wireless Communications: Principles and Practice, 2/ed by Theodore S. Rappaport, Prentice Hall, ISBN 0-13-042232-0, and selected papers. The details may change, see updated information on http://www.s2.chalmers.se/undergraduate/courses/ess036/ for latest information.

Examination

Accepted project reports, and accepted lab are necessary for a grade. In addition to this, either weekly problems must be solved correctly before given deadlines, or an extensive home exam must be solved correctly to get grade 3. To get a higher grade, a written exam must be done. For details see http://www.s2.chalmers.se/undergraduate/courses/ess036/.


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