Howtosignalprocessing
- Is code division multiple access?
- Where is CDMA used?
- What is CDMA and its advantages?
- How does code division multiplexing work?
Is code division multiple access?
CDMA (Code-Division Multiple Access) refers to any of several protocols used in second-generation (2G) and third-generation (3G) wireless communications. As the term implies, CDMA is a form of multiplexing, which allows numerous signals to occupy a single transmission channel, optimizing the use of available bandwidth.
Where is CDMA used?
Code Division Multiple Access (CDMA) is a sort of multiplexing that facilitates various signals to occupy a single transmission channel. It optimizes the use of available bandwidth. The technology is commonly used in ultra-high-frequency (UHF) cellular telephone systems, bands ranging between the 800-MHz and 1.9-GHz.
What is CDMA and its advantages?
One of the main advantages of CDMA is that dropouts occur only when the phone is at least twice as far from the base station. Thus, it is used in the rural areas where GSM cannot cover. Another advantage is its capacity; it has a very high spectral capacity that it can accommodate more users per MHz of bandwidth.
How does code division multiplexing work?
Code-division multiplexing (CDM).
A sequence of bits called the spreading code is assigned to each signal to distinguish one signal from another. The spreading code is combined with the original signal to produce a new stream of encoded data, which is then transmitted on a shared medium.
