Tutorial: Wireless Spectrum and Radio Bands

Lesson 3 of CWA Course 2231 Wireless Fundamentals
20 minutes running time.

Every country has the sovereign right to manage energy at radio frequencies in its territory. When the airspace through which the radio waves travel is public property (which is most of the time), and there is contention for its use (which is all of the time), regulation is required to allow the rational use of the shared resource.



The range of radio frequencies, called the radio spectrum, is divided into blocks of frequencies allocated for different services. Allocations are divided into allotments, which are bands of frequencies assigned to specific users or to the public. A license to emit radio-frequency energy at the specified frequencies in a specified area is issued by government to record the assignment of the allotment and the conditions for its use.

… these lesson notes continue on page 19 of the CWA Study Guide.

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Course 2232 Mobile Communications – Free Preview

TCO Certified Wireless Analyst
Course 2232 Mobile Communications
Lesson 1 Introduction to Mobile Network Components and Operations

Enjoy this free sample from CWA.

Wireless Fundamentals is the second course in the CWA Certification Package.

We begin with basic mobile network concepts and mobility terminology including base stations and transceivers, mobile switches and backhaul, handoffs and cellular radio concepts.
Then, we cover spectrum-sharing technologies and their variations: FDMA, TDMA, CDMA and OFDM, the generations of technology 1G, 2G, 3G and 4G, and the technologies GSM, 1X, UMTS, HSPA and LTE.
We’ll understand how mobile Internet access is implemented for a smartphone, and how you can keep kids quiet on car trips by turning your phone into a mobile WiFi base station.

Click here to watch the video:

Course 2232 Mobile Communications

Course Lessons
1. Mobile Network Components and Operation
2. Cellular
3. 1G: Analog Frequency-Division Multiple Access
4. Second Generation: Digital Cellular
5. Digital Cellular: Voice Communications
6. Internet Access via Cellular: “Data” Communications
7. 2G: TDMA (IS-136) Time-Division Multiple Access
8. 2G: TDMA (GSM) Time-Division Multiple Access
9. 2G: CDMA Code-Division Multiple Access
10. Spread Spectrum
11. CDMA Operation and Patents
12. 3G: CDMA 1X and UMTS
13. 4G: LTE
14. 4G: OFDM
15. Dynamic Assignment of Subcarriers
16. Spectrum-Sharing Roundup: FDMA, TDMA, CDMA, OFDM

This is just a small sample of the vast online telecommunication training and certification available through Teracom Training.

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Course 2231 Wireless Fundamentals – Free Preview

TCO Certified Wireless Analyst
Course 2231 Wireless Fundamentals
Lesson 1 Introduction and Radio Fundmentals

Enjoy this free sample video from CWA.

Course 2231 Wireless Fundamentals

Radio fundamentals • Spectrum • Digital radio • Modems and Modulation • Propagation, Penetration and Fading

Wireless Fundamentals is the first course in the CWA Certification Package. We begin with the basics: what radio is, how it’s organized and how and it’s used to communicate information.

We begin by understanding what radio actually is, and why we use it for communications. We’ll understand how radio frequencies are in the Gigahertz range, used within frequency bands measured in the Megahertz wide.

Then we will look at the spectrum, i.e. standardized bands of frequencies, how they are allocated and the need for licenses. You will learn which bands are used for what, from cordless phones to WiFi and cellular, including the new 700-MHz bands.

Next, we’ll understand how information is represented using radio. The first stop is a quick review of old-fashioned analog radio and TV, followed by what most systems use today: digital. We’ll spend some time understanding digital, how 1s and 0s are communicated by modems and familiarize you with jargon and buzzwords like QAM and QPSK.

We’ll finish off with radio transmission issues, including propagation, penetration and fading.

Course Lessons
1. Radio Fundamentals
2. Wireless Spectrum and Radio Bands
3. Analog Radio
4. Digital Radio: How Modems Work
5. Propagation, Penetration and Fading

Click here to watch the video :

Course 2231 Wireless Fundamentals

This is just a small sample of the vast online telecommunication training and certification available through Teracom Training.

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