Multiplexing is a technique used in telecommunications and data communication to combine multiple signals or data streams onto a single communication channel for transmission over a network. Multiplexing enables more efficient use of communication resources, by allowing multiple signals to share the same physical transmission medium.



There are several types of multiplexing, including: 

multiplexing and its types

Time Division Multiplexing (TDM): In TDM, multiple signals are interleaved and transmitted sequentially over a single communication channel, with each signal assigned a fixed time slot. TDM is widely used in digital telephony and circuit-switched networks. 

Frequency Division Multiplexing (FDM): In FDM, multiple signals are transmitted simultaneously over different frequency bands within the same communication channel. Each signal is assigned a separate frequency band, and the signals are separated at the receiver using filters. FDM is used in analog communication systems, such as radio and television broadcasting. 

Wavelength Division Multiplexing (WDM): In WDM, multiple optical signals of different wavelengths are transmitted simultaneously over a single fiber optic cable. Each signal is assigned a separate wavelength band, and the signals are separated at the receiver using optical filters. WDM is used in high-speed optical communication networks. Code Division Multiplexing (CDM): In CDM, multiple signals are transmitted simultaneously over the same frequency band, but each signal is encoded with a unique code to distinguish it from other signals. The signals are separated at the receiver using the corresponding decoding algorithms. CDM is used in cellular and wireless communication networks.

Overall, multiplexing techniques play a crucial role in modern communication systems by enabling efficient use of communication resources and increasing the capacity and performance of communication networks