HF communications
Write an article Analyzing on HF communications (voice communication, signal transmission restrictions, frequency allocation).
The length should be 4000 words.
The layout of the work should have the following structure:
1. Introduction (description of the problem)
2. Literature review (the official theory for this work,)
2. Methodology of work
3. Findings of the problem (your solution of the problem, new trends)
4. Discussion and Conclusion
Write an article Analyzing on HF communications (voice communication, signal transmission restrictions, frequency allocation).
