HF Communications Training Onsite



Course Name:	HF Communications: An Overview Training

Deployment Options:	Onsite - Instructor-Led Training

Course Duration:	3-4 days depending on audience background and options

Related Courses

Introduction:

For decades, HF communications have been an important, in some cases the only, way of providing long distance communication. HF makes to possible to reach people wherever they may be located, whether in the jungles of Congo, bushes of Australia, or the sands of Sahara.

In this course you will learn both the technology and applications of HF communication, both speech and digital uses such as modem utility, browsing, and mailing, to cite a few examples. For anyone involved with long-distance connectivity, understanding HF technology is a must.

We will start the course by learning the essential RF propagation concepts. We will then review the challenges offered by HF communications and how we can go about addressing them. We will place particular emphasis on the antenna technology that makes worldwide connectivity possible. We will go on to learn about modulations schemes and communications modes, architecture and design of an HF radio system, and the applications of HF. We will conclude with a comparison of HF with competing technologies and a look at the future of HF. All in all, the course will provide you with a thorough and practical introduction to HF communications.

Audience:

Those involved in the military or commercial uses of HF communications who wish to learn more about this technology.

Prerequisites:

Some prior familiarity with the basics of radio will be helpful

Customize it:

This 3-4-day HF Communication course will be customized to your needs and specifications. Eno.com will assist you in identifying those needs and specifications. A word to the wise, there are many vendors of Wireless training. They will typically have a broad and general course, one size fits all, already developed and just put your organization?s name on the title slide. This minimizes their effort and time investment. At Eno.com, every course is made to your exact and exacting specifications. We help you ensure what you are getting is what you really need even if at the beginning you weren't too sure of what that was. We fit the class to your needs. We never fit you into our standard, one size fits all, class. Please call or e-mail to schedule a no-obligation conference call to help us understand your audience background and training objectives.

Objectives:

On completing this course, you will be able to:

List the key components of an HF system and describe how they fit together
Explain how radio waves operate in different environments
Design an HF communications system
Describe the current markets and applications for HF communications

Course Outline

Introduction

History of HF communications
Terrestrial wireless communications challenges: Attenuation, reflection, diffraction, scattering, multipath effects, interference

Spectrum Basics

Electromagnetic spectrum: Bands and uses, regulation
More about the HF band
Spectrum issues: Line of Sight (LOS) transmission, path loss, etc

Radio Propagation

Electromagnetic field
Ground and surface waves: What, when
Direct waves: Direct LOS, Fresnel theory, free space loss, sum operating margin
Sky waves (Ionosphere)
--Key concepts
--Structure of the Ionosphere: D, E, F1, F2
--Critical frequencies: MUF, LUF
--Propagation effects: Daily, seasonal, geographic, sunspots, interference, weather, solar flares
--Propagation indices: K, Ap, Solar flux, Sunspot number
Tropospheric waves

Antennas

Characteristics: Dimensions, gain (dB), polarization, F/B ratio, VSWR, radiation diagrams, HPB
Types: Directional, omnidirectional
--Whip, dipole, inverted Vee, Loop, beams
--Practical examples

Modulation and Communication Modes

Modulation
--Analog: AM, SSB, FM, PM
--Digital: xFSK, xASK, xPSK, xQAM
Modes
--CW-Morse
--AM voice/SSB voice
--FM voice
--Digital: Modems/examples

HF Radios

Types: Analog, digital, portable, vehicle, nomadic, fixed
Types: analog, digital, portable, vehicle-mounted, nomadic, fixed
Architecture
Characteristics
--Power
--Channels
--Modulation

Uses of HF Communications

Long distance/amateur radio
Emergency (including disasters) communications
Maritime uses
Military applications
Examples

Link Budget Calculations

Basic principles
Tools
Calculation exercise

Emerging Trends

Automatic link establishment
Digital new services

Conclusion

Comparison of satellite and HF communications
Advantages and disadvantages
Course recap, Q/A, and Evaluations

Other Expertise:

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