Kursplan
Aim
The aim is to give a comprehensive view of the
properties of the wireless channel. This includes an understanding of
the underlying physical propagation mechanisms, measurements of channel
properties and methods for modelling these.
Knowledge and understanding
For a passing grade the student must
- have an understanding of the properties of the wireless channel and its interaction with the system
- have a comprehension of the physical propagation mechanisms and thereby being able to evaluate propagation conditions for a certain scenario
- have a comprehension of measurements of radio channel properties and methods for modelling these properties.
Skills and abilities
For a passing grade the student must
- be able to analyse and describe the properties of the radio channel and its interaction with the system, and from this be capable to select appropriate system parameters
- be able to propose and evaluate methods for using the radio channel in the most appropriate way.
- be able to write a scentific report about the channel properties.
Judgement and approach
For a passing grade the student must
- have a comprehensive view of how the radio channel interacts with other system blocks in a radio system
- feel confident in the ability to understand, analyse and describe the properties of the radio channel in order to use it in the most efficient manner.
Contents
The course connects different areas of knowledge
within, e.g., radio, digital communication, probability theory,
stochastic processes, wave propagation and mathematics. The course
covers the following topics:
- Propagation Mechanisms - Free space propagation, reflection and transmission, diffraction, scattering on rough surfaces, wave guiding
- Statistical Description of Wireless Channels - The time-invariant two-path model, time-variant two-path model, small-scale fading without line-of-sight, small-scale fading with line-of-sight, Doppler spectra, level crossing rate and random FM, large-scale fading
- Wideband Channel Characterization - Narrowband vs. wideband systems, system-theoretic description of propagation channels, the WSSUS model, description methods for time dispersion, description methods for angular dispersion
- Channel Models - Narrowband models, wideband models, spatial models, deterministic models, models for ultra wideband channels
- Channel Sounding - Time-domain methods, frequency-domain methods, generalizations, spatially resolved methods
- Antenna aspects in wireless systems - Requirements for antennas in mobile radio, antennas for mobile stations, antennas for base stations, aspects of multiple antenna systems.
- Report writing - how do you author a scientific report in the area.