Questions related to TEK5110 Building Mobile and Wireless Networks

Radio communications (related to A1)

What two functions are performed by antenna?
What is an isotropic antenna? What factors determine antenna gain?
What is meant by radiation pattern?
What is the relation between frequency and wavelength? Provide examples of typical wavelength for mobile and wireless communications.
What is fading? What are the differences between fast and slow fading, and what causes the effects?
Describe the disturbances of a radio wave due to attenuation, reflection, diffraction, scattering, and fading. What are these effects? Explain using practical examples from mobile communication environments.
How is diffraction and NLOS used for radio communications?
What is an impuls response in mobile communications? Which are the two factors describing it?
What is the difference between rural communications and urban communications?

Digital Communication and Communication Systems AA2, A1-A4

Looking into range, how do we classify wireless systems? Give examples. How can we extend the communication range?
What effect does the signal to noise ratio has on wireless communications?
What are the factors for influencing the capacity of a system? Which factor dominates?
What are the core characteristics of mobile communication systems (1G-5G)?
What is the relation between dB and dBm?
What is the propagation equation? How does real world propagation change the propagation equation?
What do we mean by indoor, pedestrian and vehicular environments? Where are they used?

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