Example questions for the oral exam#
What are the requirements for a modern healthcare monitoring system?
Imagine you want to send the temperature of a patient over a wireless link to a cloud server. Explain end-to-end, which components are involved in this setting.
How do electromagnetic waves propagate in a forest and in an urban area?
What is the purpose of link budget?
Wireless communication is typically bi-directional. Which direction is relevant for wireless communication in health monitoring? Why?
How does the signal energy change over a distance?
What is the relevance of the Fresnel zone?
In which scenarios is FSPL relevant for link budget calculations?
What is the purpose of a wireless protocol like Bluetooth and WiFi?
Why do we have different wireless protocols?
What does ad hoc communication mean? What is its advantage?
What is the advantage of energy harvesting and how can we harvest energy?
Using SDR we tuned to a frequency. Why is this important (when you compare wire with wireless communication) ?
We used different modulation techniques to transmit data using SDR. Which is relevant for transmitting temperature data of a patient. Why?
What do (de)-modulation mean?
What is a carrier frequency?
What do spectrum analyzer and waterfall diagram represent?
What happened when we tried to decode an FM signal using AM? Why?
What is the relevance of noise in wireless communication? Where does it come from?
Why do we use dB for quantities in wireless communication?
How do we convert between dBm(W) and dB(W)?
What are the components of a WBAN?
Why does a typical temperature sensor have a low data rate?