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Long Term Fading, also known as large-scale fading or shadowing, refers to the slow and gradual variations in the received signal power over time in wireless communication systems.
The calculator uses the formula:
Where:
Explanation: This formula calculates the ratio of mobile radio signal to multipath fading, which represents the long-term fading effect in wireless communication systems.
Details: Calculating long-term fading is crucial for understanding signal propagation characteristics, designing robust wireless communication systems, and optimizing network performance in various environmental conditions.
Tips: Enter the mobile radio signal and multipath fading values. Both values must be positive numbers greater than zero for accurate calculation.
Q1: What is the difference between long-term fading and short-term fading?
A: Long-term fading refers to slow signal variations over large distances due to obstacles, while short-term fading refers to rapid signal fluctuations over small distances due to multipath propagation.
Q2: What are typical values for long-term fading?
A: Long-term fading values vary depending on the environment, but typically range from 1 to 10 dB in standard wireless communication scenarios.
Q3: How does long-term fading affect wireless network design?
A: Long-term fading considerations help determine optimal base station placement, transmission power levels, and handover parameters to maintain reliable connectivity.
Q4: Can long-term fading be completely eliminated?
A: While it cannot be completely eliminated, its effects can be mitigated through proper network planning, diversity techniques, and adaptive power control mechanisms.
Q5: How does vegetation affect long-term fading?
A: Vegetation can significantly contribute to long-term fading by absorbing and scattering radio signals, particularly in forested areas or during different seasons.