carrier multiplexing
communications
Quick Summary
Carrier multiplexing is a technique that allows multiple signals to be transmitted simultaneously over a single communication path. This is done to share the cost and capacity of communication channels, such as microwave links or coaxial cables.12
There are two primary types of multiplexing:
- Frequency-Division Multiplexing (FDM): The available bandwidth of a channel is divided into different frequency bands. Each user is assigned a specific frequency band to transmit their signal. These signals are then combined and transmitted. At the receiver, filters separate the signals based on their assigned frequencies.12
- Time-Division Multiplexing (TDM): The channel's time is divided into slots, and each user is assigned a specific time slot. Data from each user is transmitted sequentially during their allocated time slot. This process is repeated rapidly, creating the illusion of simultaneous transmission.12
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