Wireless Networking · Unit 5
Fading and Channel Characteristics
Exam-focused notes for Fading and Channel Characteristics (Wireless Networking, BIT357): what the TU syllabus asks and how it has actually been tested, with 3 solved past questions from this unit.
What this unit covers
- Large scale fading
- Small scale fading
- Multipath propagation
- Time delay spread
- Rayleigh fading model
- Rician fading model
- Relationship between Rayleigh and Rician fading
Relationship between Rayleigh and Rician fading
Explain the Rician Fading model in digital communication systems, and its relationship to Rayleigh fading.[10]
Rician fading (also called Ricean fading) is a statistical model for signal propagation in wireless communication channels where the transmitted signal reaches the receiver through multiple paths, with at least one strong line-of-sight (LOS) component prese...
Full solved answer →Small scale fading
How small scale fading differs from large scale fading? Explain fading due to multipath time delay spread. [5]
Aspect Large Scale Fading Small Scale Fading ---------------------------------------------- Distance Scale Occurs over large distances (tens to hundreds of meters) Occurs over small distances (wavelengths to tens of wavelengths) Cause Path loss, shadowing b...
Full solved answer →Large scale fading
Discuss the concept of large scale fading and explain fading due to multipath time delay spread. [5]
Definition: Large scale fading refers to the slow variation in the average received signal power over distance or time in a wireless communication channel. It represents the overall trend of signal attenuation as a mobile user moves away from the transmitte...
Full solved answer →Make Unit 5 stick
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