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Block diagram of an electronic communication system



Have you ever wondered how your phone or computer is able to transmit and receive information wirelessly? Or how your TV is able to receive signals from different channels? The answer lies in the concept of electronic communication systems. In this post, we'll explore the block diagram of an electronic communication system, its history, main concepts, equations, examples, applications, and why it's an important topic in modern communication systems.

Why do we study Electronic Communication Systems?

Before we dive into the details, let's first understand why we study electronic communication systems. In simple terms, electronic communication systems are used to transmit and receive information (such as voice, data, or video) over a distance, using electronic devices such as radios, phones, and computers. Electronic communication systems have revolutionized the way we communicate and share information, and have become an essential part of modern life.

History of Electronic Communication Systems

The history of electronic communication systems dates back to the 19th century, with the invention of the telegraph and the telephone. These devices used wires to transmit electrical signals over a distance, and paved the way for modern electronic communication systems. In the early 20th century, radio broadcasting became popular, using electromagnetic waves to transmit information wirelessly. Later, television broadcasting and satellite communication systems were developed, expanding the range and quality of electronic communication. In the digital age, electronic communication systems have become even more important, as we transmit vast amounts of data wirelessly every day.

Main Concepts of Electronic Communication Systems

So, what exactly is an electronic communication system? At its core, an electronic communication system consists of four main components: a transmitter, a receiver, a communication channel, and a signal processing unit. These components are connected by a block diagram, which shows the flow of information through the system.

The transmitter is responsible for converting the input signal (such as voice or data) into a format that can be transmitted over the communication channel. This involves modulating the carrier signal (as discussed in the previous blog post), amplifying the signal, and adding other components such as filters and mixers.

The communication channel is the physical medium through which the signal is transmitted, such as a wire, a fiber optic cable, or the airwaves. The signal may encounter noise or interference during transmission, which can degrade the quality of the signal.

The receiver is responsible for receiving the transmitted signal and converting it back into the original input signal. This involves demodulating the signal, filtering out noise and interference, and amplifying the signal for further processing.

The signal processing unit is responsible for performing various operations on the signal, such as encoding and decoding, compression and decompression, and error correction. These operations help to improve the quality and efficiency of the communication system.

Equations of Electronic Communication Systems

While the concepts of electronic communication systems may seem complex, they can be described using simple mathematical equations. For example, the equation for amplitude modulation (AM) that we discussed in the previous blog post is one such equation. Another important equation is the Friis transmission equation, which relates the power received by a receiver to the power transmitted by a transmitter, and takes into account the gain and losses in the communication system.

Examples of Electronic Communication Systems

To help illustrate the concepts of electronic communication systems, let's look at some real-world examples. One example is a cell phone network, where the phone acts as the transmitter, sending voice or data signals over the airwaves to a nearby cell tower. The tower then relays the signal to other towers, until it reaches its destination. Another example is a Wi-Fi network, where a router acts as the transmitter sending data signals over the airwaves to connected devices such as laptops and smartphones.


Applications of Electronic Communication Systems


Electronic communication systems have countless applications in modern society. Some common examples include:

Telecommunications: Communication systems are used to transmit voice and data signals over long distances, such as phone and internet networks.


Broadcasting: Radio and television broadcasting systems use communication systems to transmit signals to receivers, allowing people to access news, entertainment, and information.


Navigation: GPS systems use communication systems to transmit signals from satellites to receivers, allowing for accurate navigation and location tracking.


Defense: Communication systems are used in military applications for secure communication and coordination.


Medical: Medical equipment such as heart monitors and X-ray machines use communication systems to transmit data and images.

Conclusion

In conclusion, electronic communication systems are essential to modern life, allowing us to transmit and receive information wirelessly over long distances. The block diagram of an electronic communication system shows the flow of information through the system, including the transmitter, receiver, communication channel, and signal processing unit. While the concepts and equations of electronic communication systems can be complex, understanding them can help us to better appreciate the technology that powers our daily lives.

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