Module Details

CE265-5-SP-CO: Telecommunication Principles

Year: 2016/17
Department: Computer Science and Electronic Engineering
Essex credit: 15
ECTS credit: 7.5
Available to Study Abroad / Exchange Students: Yes
Full Year Module Available to Study Abroad / Exchange Students for a Single Term: No
Outside Option: No

Staff
Supervisor: Professor Stuart Walker
Teaching Staff: Professor Stuart Walker
Contact details: CSEE School Office, email: csee-schooloffice (non-Essex users should add @essex.ac.uk to create full e-mail address), Telephone 01206 872770

Module is taught during the following terms
Autumn Spring Summer

Module Description

This main aim of this module is to provide a detailed description of the data link layer of telecommunications systems and its interface with the physical layer of these systems. It starts by using the OSI model to place these layers in the context of the entire telecommunication system. It then describes the principal methods for the quantitative description of link signals, which then enables the fundamental link layer transmission media to be described as well as of baseband transmission. A discussion of link layer flow control and error correction naturally leads to description of link layer protocols. Finally, the transmission of digital signals over analogue links and analogue signals over digital lines are discussed. A coursework assignment will be set on the detailed planning of satellite up and down links. There will also be two progress tests.

Learning Outcomes

After completing this module, students will be expected to be able to:

1. Outline the main features of the OSI model.
2. Describe the main properties of transmission media.
3. Explain data encoding and error correction.
4. Explain link-layer error correction and flow control techniques.
5. Describe link-layer protocols.
6. Explain analogue transmission over digital lines.
7. Explain digital transmission over analogue lines.
8. Manipulate signal transforms.
9. Use logarithmic techniques.

Outline Syllabus

. Introduction:
Telecommunications history;
Communications model;
Data communications networking;
Computer communication protocols;
OSI model.

. Signal Basics:
Time/frequency representation of signals and pulses;
Bandwidth;
Bit rate and symbol rate;
Spectral efficiency.

. Transform theory:
Transform theory;
Understand and manipulate signals in time;
Frequency and probability domains.

. Logarithm usage:
Use dB units to design systems and investigate power levels.

. Baseband Digital Transmission:
Transmission model (noise, interference, sampling, decision);
Pulse shaping;
Inter-symbol interference;
Eye diagram.

. Transmission Media:
Two-wire open system;
Twisted pairs lines;
Coaxial cables;
Optical fibres;
Satellite;
Microwave;
Radio.

. Data Transmission:
Basics;
Bit serial;
RTZ and NRTZ:
Communication mode:
Synchronous and asynchronous transmission;
Packetisation;
Character bit and frame synchronisation;
Error detection;
Flow control;
Data compression;
Transmission control circuits.

. Protocol Basics:
Error control;
Idle RQ;
Continuous RQ (selective and go-back-N);
Link utilisation;
Flow control;
Sequence number;
Link management.

. Data Link Control Protocols
Introduction;
Control-oriented protocols (simplex, half-duplex, duplex);
Bit-oriented protocols;
HDLC;
Multilink procedure;
Link access;
Logical link control.

. Attenuations and Distortions:
Attenuation;
Distortion;
Noise (impulsive and white);
Energy/bit;
Propagation delay;
Shannon-Hartley law.

. Physical Layer Interface:
Current loop;
RS232;
RS-449;
X.21.

. Transmission of Digital Signals over Analogue Lines:
PSTN;
Modems;
ASK;
FSK;
PSK;
m-PSK;
DPSK.

. Transmission of Analogue Signals over Digital Lines:
PCM, sampling;
Sample-and-hold;
Aliasing distortions;
Quantisation distortion;
Signal-to-quantisation noise ratio;
Pre- and post-filtering;
Grey code;
Non-linear quantisation;
Companding/expanding (A and ? law);
Data rate for speech;
Audio and video;
Digital multiplexing and digital hierarchy;
Data reduction;
DPCM.

. Demodulation:
Non-coherent demodulation;
Synchronous demodulation;
Phase locked loop.

Learning and Teaching Methods

Lectures and Classes

Assessment

30 per cent Coursework Mark, 70 per cent Exam Mark

Coursework

Progress Test, worth 10%, held in week 21; Assignment 1: Satelite link design, worth 20%, submitted in week 23

Exam Duration and Period

2:00 during Summer Examination period.

Other information

STUDENTS SHOULD NOTE THAT THIS MODULE INFORMATION IS SUBJECT TO REVIEW AND CHANGE

Bibliography

  • Highly Recommended Reading (core texts)
  • HALSALL, F, Data Communications, Computer Networks and Open Systems, Addison Wesley, 4th edition, 1996, TK 5105.H2
  • BATEMAN, A, Digital Communications, Addison-Wesley, 1999, TK 5103.7.B2
  • SKLAR, B, Digital Communications: Fundamentals and Applications, Prentice-Hall 2nd edition, 2001, TK 5103.7.S5