Fade Mitigation Techniques — Lesson 3

This lesson covers the concept of fade mitigation techniques, focusing on signal processing fade mitigation technique (FMT) and power control technique. It delves into the intricacies of spectral efficient modulation, data rate reduction, and code division multiple access (CDMA). The lesson also explores the concept of diversity, including site diversity, orbit diversity, frequency diversity, and time diversity. It provides a comprehensive understanding of how these techniques can be used to manage signal attenuation during fade. For instance, the lesson explains how switching from higher spectral efficient modulation to lower spectral efficient modulation can help manage fade.

Video Highlights

00:18 - Signal processing FMT
04:02 - Diversity control FMT
11:04 - Example problem
15:24 - Frequency diversity and time diversity
18:34 - Different types of FMT
26:25 - Mixed FMT
27:08 - Design issues in FMT

Key Takeaways

- Signal processing FMT and power control technique are crucial in managing signal attenuation during fade.
- Higher spectral efficient modulation requires higher power, but during fade, lower spectral efficient modulation can be used to compensate for reduced energy per bit.
- Data rate reduction is another technique to manage signal attenuation during fade.
- CDMA technique can be used to compensate for fade by increasing coding gain.
- Diversity techniques, including site diversity, orbit diversity, frequency diversity, and time diversity, can be used to manage signal attenuation during fade.