detail of CDMA if any one plz send. thanks?

Answer 1

http://en.wikipedia.org/wiki/CDMA
http://www.networkworld.com/details/464.html
http://www.iec.org/online/tutorials/wcdma/
http://www.bee.net/mhendry/vrml/library/cdma/cdma.htm
http://searchmobilecomputing.techtarget.com/sDefinition/0,,sid40_gci213842,00.html
http://www.business.com/directory/telecommunications/wireless/code%2Ddivision%5Fmultiple%5Faccess%5Fcdma/
http://www.compareindia.com/tips/code-division-multiple-access.htm

etc. etc. etc.

I guess I really **AM** the only one around here who's bright enough to figure out how to use a search engine.


Doug

Answer 2

CDMA is the short for Code-Division Multiple Access, a digital cellular technology that uses spread spectrum techniques. CDMA doesn't assign a specific frequency to each user. Instead every channel has full available spectrum. Means, the data is sent in small piecesover a number of discrete frequencies available for use at any time in the specified range. All of the users transmit in the same wide band chunk of spectrum. Each user's signal is spread over the entire band width by a unique spreading code. At the receiver end, that same unique code is used to recover the signal.
This is a millitary technology first used by the english during world war 2.

Answer 3

Code division multiple access (CDMA) is a form of multiplexing (not a modulation scheme) and a method of multiple access that does not divide up the channel by time (as in TDMA), or frequency (as in FDMA), but instead encodes data with a special code associated with each channel and uses the constructive interference properties of the special codes to perform the multiplexing. CDMA also refers to digital cellular telephony systems that make use of this multiple access scheme, such as those pioneered by Qualcomm, and W-CDMA by the International Telecommunication Union or ITU.

CDMA has since been used in many communications systems, including the Global Positioning System (GPS) and in the OmniTRACS satellite system for transportation logistics.

Answer 4

Please tell everyone what CDMA represents. Also, restructure your sentence so that is makes sense. You could start out with something like this.

"CDMA stands for classical derivatives of mathematical abstracts. Does anyone know anything on this subject."