TDMA & FDMA & CDMA

 

Picture From 

 https://www.semanticscholar.org/paper/Time-Division-Multiple-Access-(TDMA)-applicable-for-Lcev/d31671530be211532e7d1a2951c538fc32f6c713

Time Division Multiple Access (TDMA)

Time Division Multiple Access (TDMA) is a type of multiplexing that allows multiple users to share a single channel by dividing the channel into time slots. Each user is assigned a specific time slot in which to transmit data. This allows multiple users to share the same channel without interference as long as they use different time slots. TDMA is used in various communication systems, including mobile phone networks and satellite communication systems. It is a popular multiplexing technique because it allows efficient bandwidth use and reduces user interference.

Frequency Division Multiple Access (FDMA)

Frequency Division Multiple Access (FDMA) is a multiplexing technique that allows multiple users to share a channel by dividing it into frequency bands. Each user is assigned a specific frequency band in which to transmit data. This allows multiple users to share the same channel without interference as long as they use different frequency bands. FDMA is used in various communication systems, including analog cellular networks and satellite communication systems. It is a simple and efficient multiplexing technique that allows for bandwidth's efficient use and reduces user interference.

Code Division Multiple Access (CDMA)

Code Division Multiple Access (CDMA) is a digital cellular technology that uses spread spectrum techniques to allow multiple users to share the same frequency band simultaneously. It is a multiplexing technique that divides a given frequency band into several smaller channels, each of which is assigned to a particular user. CDMA is used in many cellular phone systems, including 3G and 4G networks, and is known for its ability to support many users in a given area.