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What Is Wireless: How It Works And Examples

What Is Wireless: How It Works And Examples


What is Wireless


Millions of people in Indonesia are already connected to the internet using WiFi. This is also known as a “wireless network” or “wireless network”. WiFi is widely installed in all places from cafes, airports, and many other public buildings. Then what is wireless, how does it work and examples? Read on to find out.


Also read: Types of Wireless Networks and Their Advantages and Disadvantages

TABLE OF CONTENTS

1. What is Wireless?

2. Wireless History

3. Where is Wireless Used?

4. How Wireless Works

5. Signal Frequency

6. How Do Signals Move?

7. Inside the Transmitter

8. Example of Wireless Usage

9. Examples of Wireless Devices

10. Advantages and Disadvantages of Wireless

11. Conclusion


What is Wireless?


In its most basic sense, wireless refers to communications that are sent without wires. More specifically, the term can refer to a variety of technologies and media, from cellular networks to Bluetooth devices to local Wi-Fi networks.


Wireless is a broad term that includes all types of technologies and devices that transmit data over the air rather than over wires, including cellular communications, computer-to-computer networking with wireless adapters, and other wireless computer devices.


Wireless communication travels over the air via electromagnetic waves. The FCC is the agency that regulates radio frequency bands in this spectrum, ensuring that they are not overcrowded and that wireless devices and services operate reliably.

Wireless History


You will be surprised to know that the history of wireless technology dates back to the 19th century. German physicist Heinrich Hertz was the one who created the first electromagnetic radio waves in his lab. Then the British physicist Sir Oliver Lodge was the one who sent the first message using radio waves in Oxford, England. Then developed by Guglielmo Marconi who is the inventor of the first wireless telegraph system in 1896.


We know the main function of wireless technology is to set up wireless communication where a sender can send information to multiple receivers that are not connected to it via any electrical connector. Marconi's invention set this path forward though because he was the first to send a wireless signal over a mile and a half. The message covered 6 kilometers, and it read “Are You Ready?� It took people decades to get ready and walk the path he indicated earlier.


Where is Wireless Used?


Before delving into how wireless communication occurs, let's look at areas where it can be applied. In most cases, many people use wireless communication to transmit data. It can be in one direction, such as radio or TV broadcasts or two-way data transfer where one entity acts as transmitter and other as receiver. In the second scenario we can use satellite, WiFi access point or cellular network, such as upcoming 3G, 4G or 5G as intermediary point which helps to achieve such communication between transmitter and receiver.


How Wireless Works


In order for wireless communication to occur, we need data to be transported wirelessly. This data is transported using what we call signals (electromagnetic waves). Now the question arises how can we make a signal to be sent via wireless? It all starts at the transmitter, where the oscillator produces a periodic waveform. This signal travels through the device's internal cables to the antenna. Since the antenna is a conductor, the electric current flows further to the end of the antenna. The antenna then emits alternating current as electromagnetic waves. This is where wireless begins where the antenna converts electric current into waves.


Signal Frequency


Depending on how fast the signal from the oscillator changes, the output waveform has a different frequency. These frequencies can be used for different purposes. People call these different frequency ranges as spectrum. It is divided into specific areas of use. Examples of uses are: radio-navigation, radio-location, broadcasting, mobile communication, ISM band, satellite, space research and many others. Government authorities, such as the FCC, are responsible for establishing frequency ranges for specific purposes.


How Do Signals Move?


Signals usually don't go straight to the receiver after being sent. The antennas on the transmitter transmit signals in various directions. Waves can bounce off buildings, diffract at sharp edges or scatter on small objects and still reach the receiver. On their way, the waves experience different attenuations and delays. The receiver captures everything as a combined signal. When there is more than one route between the transmitter and the receiver, the channel is usually referred to as a multipath channel.


Inside the Transmitter


We know that receiver has to deal with distorted and mixed signals to decode the data. This is not a trivial task because the captured signal contains a large number of unwanted components. To make this task easier, we must take some additional steps in the transmitter. Before sending user data, the transmitter performs coding. This operation adds additional bits to the message, which makes data recovery at the recipient easier. After encoding the bits are mapped to symbols, modulated and passed to the antenna.


Example of Wireless Usage

Say you have a WiFi network in your home or office, a small zone where computers can get broadband internet. It uses radio waves, like a TV or cell phone. Sometimes you may hear this zone referred to as a WLAN (Wireless Local Area Network).


A device called a wireless transmitter receives information from the internet through your broadband connection. The transmitter converts the information into radio signals and transmits them.


You can think of a transmitter as a mini radio station, broadcasting signals sent from the internet. The 'audience' for this transmission is a computer (or computers, because more than one person can be connected at the same time) that receives radio signals over the internet. something called a wireless adapter.


The whole process, meanwhile, works in reverse, with the computer sending the information to the wireless transmitter. It then converts it and sends it over your broadband connection.


Examples of Wireless Devices


Examples of wireless devices are TV remote controls, radios, and GPS systems. Other examples of wireless devices include phones, tablets, Bluetooth mice and keyboards, wireless routers, and almost anything else that doesn't use cables to transmit information. Wireless chargers are also another type of wireless device. Although no data is sent through the wireless charger, it interacts with other devices (such as phones) without using cables.


Advantages and Disadvantages of Wireless


Advantages of Wireless:

 1. Mobility: Can be used at any time and the ability to access data on the wireless network is real time, as long as it is still in the hotspot area.

 2. Installation Speed: The installation process is fast and there is no need to use cables.

 3. Place Flexibility: Can reach places that are impossible to reach cables.

 4. Budget reduction

 5. Wide reach


Wireless Disadvantages:

 1. Transmit data is much slower than using a cable.

 2. Radio Propagation (Wave Interference) or a combination of two waves that disrupt wireless networks.

 3. Limited network capacity.

 4. Data security is not guaranteed.

 5. Intermittence (dashed signal)


Conclusion


So what is wireless? Wireless is a technology that transmits information through the air electromagnetically or wirelessly. The wireless transmission medium may be light, sound, or distorted magnetic or electric fields.

Hopefully, this article about What Is Wireless: How It Works And Examples, gives you a little insight. Also, read an article about What is XSS (Cross-Site Scripting) Attack? that you may need to know. Thank you.

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