Question

Short-term fading is caused by: (Select all that influence short-term fading)

a): built-in environment

b): human-built structures

c): terrain configurations

d): natural obstacles, e.g., a forest

Answer 1

Short term fading is also known as fast fading in which signal amplitude is vary due to various reasons.

a) built in environment, short term fading may occur due to some built in environment such as fog, cloud, rain etc as it occurs for very few time therefore it is short term fading.

b)human built structure, it is the main cause of short term fading in urban and metropolitan cities, as tall and conjugated building are there signal gets diffracted, some time multipath propogation may also cause fading.

Only two are the main cause of short term fading. Remaining are long term fading, terrain configuration causes long term fading as signal not travel to that regions. Forest generally comes under terrain configuration and hence it also not the type of short term fading.