2006-10-26 22:16:39 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
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.
2006-10-26 22:17:44 · answer #1 · answered by Vishal B 2 · 0⤊ 0⤋
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.
2006-10-27 05:20:08 · answer #2 · answered by Jeanjean 4 · 0⤊ 0⤋
In English, it's a wireless architecture. (Rules on how the voice signals are processed.)
2006-10-27 05:29:04 · answer #3 · answered by vinny_the_hack 5 · 0⤊ 0⤋