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Articles by Arjun Thakur
Page 15 of 75
Passband Transmission
Passband transmission is a digital modulation technique where the amplitude, phase, or frequency of a high-frequency carrier signal is regulated to transmit digital bits. The incoming data stream is modulated onto a carrier and then transmitted over a band-pass channel that allows only specific frequencies to pass through. Unlike baseband transmission where digital signals are transmitted directly, passband transmission shifts the signal to a higher frequency range, making it suitable for transmission over long distances and through various communication media like radio waves, satellite links, and optical fibers. Types of Passband Modulation ...
Read MoreMicrowave Transmission
In the electromagnetic spectrum, waves within the frequencies 1 GHz to 300 GHz are called microwaves. Microwave transmission is a form of wireless communication that uses these high-frequency radio waves to transmit data over long distances. Microwave communication systems are widely used for point-to-point communication links, cellular networks, satellite communications, and wireless networking due to their ability to carry large amounts of data at high speeds. Microwave Line-of-Sight Communication Transmitter Receiver Microwave Beam Building ...
Read MoreInfrared Transmission
Infrared transmission is a wireless communication method that uses infrared waves in the electromagnetic spectrum between frequencies 300 GHz and 400 THz. These waves have wavelengths shorter than microwaves but longer than visible light, making them suitable for short-range data transmission applications. Infrared propagation follows line-of-sight principles, meaning the transmitter and receiver must have a direct, unobstructed path for communication. This characteristic makes infrared ideal for controlled environments but limits its range and outdoor applications. Infrared Transmission - Line of Sight Communication IR Transmitter ...
Read MoreWhat are Error-Detecting Codes?
Error-detecting codes are a sequence of numbers generated by specific procedures for detecting errors in data that has been transmitted over computer networks. These codes add redundant information to data to help identify transmission errors at the receiving end. When bits are transmitted over computer networks, they are subject to corruption due to interference, noise, and network problems. The corrupted bits lead to spurious data being received by the receiver and are called errors. Error-detecting codes ensure messages are encoded before transmission over noisy channels. The encoding is designed so that the decoder at the receiving end can ...
Read MoreThird-Generation (3G) Mobile Phones
Third generation mobile phones, or 3G mobile phones, represent a set of standards for wireless mobile communication systems that deliver high-quality multimedia services alongside superior voice transmission. 3G technology marked a significant leap from 2G systems by introducing high-speed data transmission and advanced internet capabilities. 3G Mobile Technology Evolution 2G Voice + SMS ~64 kbps 3G Multimedia 2+ Mbps 4G/5G Broadband 100+ Mbps ...
Read MoreDigitizing Voice Signals
Digitizing voice signals is the process of converting analog voice communications into digital form for transmission over modern telephone networks. This transformation enables efficient multiplexing, improved signal quality, and integration with digital communication systems. Analog Telephone Cores Early telephone networks operated with analog cores that transmitted voice signals in their original analog form. These systems used Frequency Division Multiplexing (FDM) to combine multiple voice channels over a single transmission line. Group formation − Twelve individual calls were multiplexed into a basic group Supergroup formation − Five groups were further multiplexed into a supergroup ...
Read MoreFourth Generation (4G) Mobile Phones
Fourth Generation (4G) mobile phones provide broadband cellular network services and represent the successor to 3G mobile networks. 4G delivers an all-IP based cellular communication system with capabilities that adhere to IMT-Advanced specifications established by the International Telecommunication Union (ITU). The transition to 4G marked a significant leap in mobile technology, moving from circuit-switched to packet-switched networks and enabling true mobile broadband experiences comparable to fixed broadband connections. Key Features All-IP packet switched network − Transmits voice, data, signals, and multimedia over a unified IP-based infrastructure. High-quality uninterrupted services − Aims to provide ...
Read MoreCommunity Antenna Television
Community Antenna Television (CATV), also known as Community Access Television, was originally developed to provide cable TV services to rural areas and hilly terrains where over-the-air broadcast signals were weak or unavailable. Subscribers pay a monthly subscription charge along with an initial installation fee to access these services. CATV systems work by using large community antennas positioned on hilltops or tall structures to receive strong broadcast signals from distant television stations and communication satellites. These signals are then distributed to homes and businesses through a network of coaxial cables. System Layout The CATV system comprises several key ...
Read MoreWhat is Network Acceleration?
Network acceleration is a set of techniques used to increase the speed of information flow between end users, providing better network performance and user experience. It is also known as WAN optimization or WAN acceleration. Network acceleration becomes crucial when organizations need to optimize data transfer across wide area networks, especially for applications like file transfers, video conferencing, and cloud services that require high bandwidth and low latency. Techniques Used in Network Acceleration Traffic Shaping − Priority is assigned to network traffic based on which bandwidth is allocated to ensure critical applications receive adequate resources. ...
Read MoreA Utopian Simplex Protocol
The Simplex Protocol is a theoretical data link layer protocol designed for unidirectional data transmission over an ideal, error-free channel. It represents the most basic form of communication protocol where transmission can never go wrong. This protocol assumes both sender and receiver are always ready for data processing with infinite buffer capacity. The sender transmits all available data immediately, while the receiver processes incoming frames instantly. Since it handles neither flow control nor error control, it is often called the Utopian Simplex Protocol. The significance of this protocol lies in demonstrating the fundamental structure upon which more practical ...
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