CDMA
CDMA stands for Code Division Multiple Access, a type of multiplexing that allows multiple signals to manage a single communication and optimize bandwidth usage.
CDMA systems are very different when compared to their frequency and time equivalents. That is, in this type of system, the operator has the right to use the entire bandwidth throughout the entire loop. The principle is to use different CDMA codes to distinguish users. This CDMA technology is used in UHF (Ultra High Frequency) mobile phones at 800 MHz & 1.9 GHz band. The features of CDMA basically include the following points.
- CDMA allows many users to connect simultaneously, providing better data and communication.
- There is no limit to the number of users in a CDMA system, but performance decreases as the number of users increases.
- The CDMA system eliminates noise and interference and improves network quality.
- CDMA allows its signal to enter different and unique codes of user transmissions to protect its signals.
- In CDMA all channels use the full spectrum.
- All the cells within CDMA systems can utilize a similar frequency.
Code Division Multiplexing
Multiplexing is a method that can be used to send multiple analog or digital signals over communication channels such as radio waves or fiber optic cables and convert them into a single signal. When the destination is reached, the signal is demultiplexed. The main purpose of using this method is to share limited resources. A real-world example of multiplexing is in the telecommunications industry, where multiple calls can be made using a single connection.