TEK5110/List of Questions
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Radio communications and antennas (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 happening when I double the frequency, e.g. from 900 to 1800 to 2400 to 5100 MHz (in terms of range and capacity)?
- 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, A2-A4, B1-C3
- Looking into range, how do we classify wireless systems? Give examples. How can we extend the range (how can we reach longer)?
- 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 is the relation between dB and dBm? Examples, e.g. doubling power, 10 x power
- What is the free space 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?
Communication Systems
- What is the bandwidth of typical mobile and wireless systems? Provide examples.
- What is a MIMO system and how does it enhance the capacity of a communication?
- What are the core characteristics of mobile communication systems (1G-5G)?
Remote Monitoring and Management
- What are the advantages of remote monitoring and management of wireless devices? (name at least three)
- What are three common managed wireless solutions? (explain each solution in short)
- What is the software-defined networking (SDN)? Can we use SDN solution to monitor and manage wireless networks?(explain in short)
- Explain IoT device life cycle.
- What is the optimal IoT management architecture(using a gateway or direct connection to management server)?
- What kind of wireless issues are idenrifiable by using protocol analyzers capturing wireless frames? (name at least three)
Information
- Compendium Building_Mobile_and_Wireless_Networks_Compendium
- Slides presented in the TEK5110 lectures
