- #1
- 908
- 576
And also polarization division multiple access!...
The quest to maximize channel capacity is older than we may realise.
The quest to maximize channel capacity is older than we may realise.
Swamp Thing said:And also polarization division multiple access!...
The quest to maximize channel capacity is older than we may realise.
CDMA is a digital cellular technology that uses spread spectrum techniques to allow multiple users to share the same frequency band simultaneously. It assigns a unique code to each user to differentiate their signals, allowing for more efficient use of the available bandwidth.
CDMA differs from other multiple access technologies, such as Time Division Multiple Access (TDMA) and Frequency Division Multiple Access (FDMA), by allowing multiple users to transmit simultaneously on the same frequency band. This is achieved by using unique spreading codes to differentiate between users, rather than dividing the frequency band into separate time slots or frequency channels.
Some of the advantages of CDMA include increased capacity, improved call quality, enhanced security, and better resistance to interference and fading. CDMA also allows for seamless handoffs between cells and supports a wide range of data rates, making it suitable for both voice and data transmission.
Some of the limitations of CDMA include the need for complex signal processing algorithms, which can increase the cost and complexity of the system. CDMA also requires careful planning and coordination to avoid interference between users, and it may not be as efficient in certain deployment scenarios compared to other multiple access technologies.
CDMA is used in modern communication systems, such as 3G and 4G cellular networks, to provide reliable and efficient wireless communication services. It is also used in satellite communication, wireless LANs, and other wireless applications where multiple users need to share the same frequency band. CDMA continues to evolve with advancements in technology, such as the introduction of LTE and 5G networks.