Communication System – Class 12 | Chapter – 15 | Physics Short Notes Series PDF for NEET & JEE

Communication System: A communication system is a collection of hardware and software components that work together to enable the transmission and reception of information between two or more locations. Communication systems are used to send and receive various types of data, including voice, video, text, and images, over various communication channels, such as wired or wireless networks.

Components of Communication System

A typical communication system consists of four basic components:

  • Transmitter: The transmitter is the device that converts the information into a signal that can be transmitted over a communication channel. The transmitter may include a modulator, which modulates the information onto a carrier signal, and a transmitter antenna, which broadcasts the signal over the communication channel.
  • Communication channel: The communication channel is the medium through which the signal is transmitted from the transmitter to the receiver. The channel may be wired or wireless, and may include various components such as cables, fiber optics, and radio waves.
  • Receiver: The receiver is the device that receives the transmitted signal and converts it back into the original information. The receiver may include a demodulator, which extracts the information from the carrier signal, and a receiver antenna, which receives the signal from the communication channel.
  • Feedback mechanism: The feedback mechanism is used to ensure that the transmitted information is received accurately. This may involve sending acknowledgments back to the transmitter or using error correction techniques to detect and correct errors in the received signal.

Classifications of Communication System

Communication systems can be classified into various categories based on different criteria. Some of the common classifications of communication systems are:

  • Analog and digital communication systems: As mentioned earlier, communication systems can be classified into analog and digital systems based on the nature of the signal being transmitted. Analog systems transmit continuous signals, while digital systems transmit discrete signals.
  • Wired and wireless communication systems: Communication systems can be classified into wired and wireless systems based on the transmission medium. Wired systems use cables or wires to transmit signals, while wireless systems use electromagnetic waves to transmit signals.
  • Point-to-point and broadcast communication systems: Communication systems can be classified into point-to-point and broadcast systems based on the number of recipients of the transmitted signal. Point-to-point systems transmit signals to a specific recipient, while broadcast systems transmit signals to multiple recipients.
  • Simplex, half-duplex, and full-duplex communication systems: Communication systems can be classified into simplex, half-duplex, and full-duplex systems based on the direction of signal transmission. Simplex systems transmit signals in only one direction, while half-duplex systems allow transmission in both directions, but not simultaneously. Full-duplex systems allow simultaneous transmission in both directions.
  • Circuit-switched and packet-switched communication systems: Communication systems can be classified into circuit-switched and packet-switched systems based on the method of data transfer. Circuit-switched systems set up a dedicated communication path between the sender and receiver, while packet-switched systems break the data into packets and transmit them over a shared network.
  • Asynchronous and synchronous communication systems: Communication systems can be classified into asynchronous and synchronous systems based on the timing of signal transmission. Asynchronous systems transmit data without a common clock, while synchronous systems use a common clock to synchronize signal transmission.

Technologies of Communication System

There are many different technologies used in communication systems, ranging from traditional wired and wireless systems to more advanced technologies used in modern digital communication systems. Some of the common technologies used in communication systems include:

  • Wired communication technologies: Wired communication technologies use physical cables to transmit signals between devices. Examples of wired communication technologies include coaxial cables, twisted pair cables, and fiber optic cables.
  • Wireless communication technologies: Wireless communication technologies transmit signals using electromagnetic waves instead of physical cables. Examples of wireless communication technologies include radio waves, microwave, and infrared.
  • Satellite communication technologies: Satellite communication technologies use satellites in orbit around the earth to transmit signals over long distances. Satellites can be used for various applications, such as television broadcasting, telephone communication, and global positioning systems (GPS).
  • Cellular communication technologies: Cellular communication technologies use a network of cell towers and mobile devices to transmit signals over a wide area. Cellular communication technologies include technologies like 2G, 3G, 4G, and 5G.
  • Wi-Fi and Bluetooth technologies: Wi-Fi and Bluetooth technologies are wireless communication technologies used for short-range communication between devices. Wi-Fi is used for high-speed internet access, while Bluetooth is used for device-to-device communication, such as connecting a wireless headset to a phone.
  • Internet Protocol (IP) technologies: IP technologies are used for transmitting data over the internet. These include technologies like TCP/IP, HTTP, FTP, and SMTP.
  • Cloud-based communication technologies: Cloud-based communication technologies use cloud computing to store and process data. These technologies include cloud-based email services, file sharing services, and video conferencing tools.

Biology Quiz & Notes Physics Quiz & Notes Chemistry Quiz & Notes

Follow on Facebook

By Team Learning Mantras

Related post