Mobile Radio Propagation and Signal Transmission

Which mechanisms can generally be attributed to electromagnetic wave propagation?

What happens to the strengths of electromagnetic waves as the distance between the transmitter and receiver increases?

In urban areas with high-rise buildings, what causes severe diffraction loss in cellular radio systems?

What do large-scale propagation models predict for an arbitrary transmitter-receiver separation distance?

What interaction between electromagnetic waves causes multipath fading at a specific location?

Electromagnetic Wave Propagation

Mechanisms attributed to electromagnetic wave propagation include:
- Reflection
- Refraction
- Diffraction
- Scattering

Attenuation of Electromagnetic Waves

As the distance between the transmitter and receiver increases, the strengths of electromagnetic waves:
- Decrease
- Experience path loss

Diffraction Loss in Urban Areas

In urban areas with high-rise buildings, severe diffraction loss in cellular radio systems is caused by:
- Buildings blocking the line-of-sight (LOS) path
- Waves diffracting around obstacles, resulting in signal loss

Large-Scale Propagation Models

Large-scale propagation models predict that, for an arbitrary transmitter-receiver separation distance:
- Path loss increases with distance
- Signal strength decreases with distance

Multipath Fading

Multipath fading at a specific location is caused by the interaction between electromagnetic waves, specifically:
- The combination of direct and indirect waves arriving at the receiver
- Interference between these waves, resulting in signal fading

Learn about the basic mechanisms of signal propagation in mobile radio systems, including path loss, multipath propagation, and the diverse mechanisms behind electromagnetic wave propagation such as reflection, diffraction, and scattering.