Multiplexing enables multiple signals to share a single transmission channel from "summary" of Data Communications and Networking by Behrouz A. Forouzan
Multiplexing allows multiple signals to share a single transmission channel, which is an essential concept in data communication. By utilizing multiplexing, different signals can be combined and sent over the same channel simultaneously, increasing the efficiency of the communication system. There are several types of multiplexing techniques, each with its own characteristics and applications. Time-division multiplexing (TDM) divides the channel into time slots, with each signal taking turns to transmit during their designated time slot. This method is commonly used in telecommunication systems where multiple users share the same communication line. Frequency-division multiplexing (FDM) divides the channel into frequency bands, with each signal allocated a specific frequency range for transmission. This technique is often used in radio and television broadcasting to transmit multiple channels over the airwaves simultaneously. Statistical multiplexing dynamically allocates bandwidth to different signals based on their data rate and requirements. This method is efficient in situations where the traffic load varies over time, allowing for optimal utilization of the channel capacity. Wavelength-division multiplexing (WDM) is another form of multiplexing that combines multiple optical signals on different wavelengths onto a single optical fiber. This technique is commonly used in fiber-optic communication systems to increase the data transmission capacity of the fiber.- Multiplexing plays a crucial role in data communication by enabling multiple signals to share a single transmission channel efficiently. By utilizing different multiplexing techniques, communication systems can transmit multiple signals simultaneously, increasing the overall throughput and capacity of the system.
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