CDMA FULL FORM
Full Form of CDMA : Code Division Multiple Access
What is the full form of CDMA?
No:1. The full form of CDMA is Code Division Multiple Access.
No:2. It is a method of channel access and is an example of multiple access as well.
No:3. Multiple access states that data can be transmitted simultaneously to a single communication channel through several transmitters.
No:4. Variant CDMA codes are issued or allocated to several users and thus users can access the entire frequency band or bandwidth as the whole.
No:5. This technique does not restrict the user’s range of frequencies.
No:6. Therefore, without any unnecessary interference among multiple users to share a frequency band with the aid of CDMA.
No:7. Along with ADC (analogue to digital conversion), CDMA enables the use of spectrum technology.
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A Brief History of CDMA
No:1. For a long time, CDMA software was in use. In 1935, Dmitry Ageev addressed this subject for the very first time.
No:2. During the World War II era, CDMA has also been used to stop the jamming transmission attempts.
No:3. It was then applied in the military sector which was used in ranging, anti-jamming and so on.
No:4. It was used by Leonid Kupriyanovich in 1957 when he was creating an automated wearable mobile phone design.
No:5. Ultimately, in 1993, the specifications for CDMA technology were approved by the TIA (Telecommunications Industry Association).
No:6. Sixteen million users were registered in September 1998 for the use of CDMA systems. Today, CDMA is supported by 22 nations.
Features of CDMA
No:1. At a defined time, it enables more users to communicate and thus offers enhanced capacity for voice and data communication.
No:2. Many of the channels in CDMA use a complete spectrum.
No:3. To reduce interference & noise and thereby increase the efficiency of the network, CDMA systems make use of power control.
No:4. To protect its signals, CDMA encodes user transmissions into separate and special codes.
No:5. The same frequency can also be used by all cells in CDMA systems.
No:6. There is also no fixed limit to the number of participants in a CDMA system, but performance degrades with an increment in the number of participants.
Applications of CDMA
No:1. CDMA is used in the GPS (Global Positioning System)
No:2. Several cell phone firms use this technology
No:3. The UTMS 3 G cell phone standard uses W-CDMA.
No:4. CDMA was used in the OmniTRACS transportation satellite system.
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