Code division multiple access

Optical Code Division Multiple Access Fundamentals and Applications, edited by Paul R. Prucnal... 

CD-RW (compact disc read-write) CDMA (code division multiple access) CGI (common gateway interface)... 

Because all conventional cellular wireless systems, including 3G systems, were fundamentally designed as circuit-switched, voice-transmission systems, they were designed and optimized primarily at the physical layer. The choice of code-division multiple access (CDMA)i as multiple-access technology at the physical layer was also dictated by voice-transmission requirements. Hash-OFDM,... 

G systems in Europe (WCDMA) and the United States (CDMA 2000) are based on code division multiple access or CDMA technology. 

Due to the low data rate, earlier forms of mHealth were restricted to store-and-forward operation. However, a milestone was reached when third-generation mobile telecommunications (3G) became widely available in the mid-2000s. High-speed downlink packet access (HSDPA), an enhancement of wideband code-division multiple access (WCDMA), can offer a peak downlink data rate of up to 14 Mbps. 

WCDMA wideband code-division multiple access... 

Wireless telecommunications not only includes the popular code-division multiple access (CDMA) and Global System for Mobile communications (GSM) cellular telephone technologies but a vast array of other wireless phone systems as well. These include the two-way phone systems used by businesses, such as a power company by emergency services, such as a fire department by the military, such as battlefield communications systems by public service systems, such as the marine VHF radio and by individual users, such as ham radio operators. There are many other wireless devices in use as well, including infrared devices such as television controllers, cordless mice, garage-door openers, model-car controllers, and several satellite-type devices, such as the Global Positioning Systems installed in cars. 

When the generator is first turned on the F/F must be set to predetermined states. For a BSR this may be any set of values agreed upon by the transmitter and receiver, except the all 0 state. A BSR initiated to all Os will stay in that state forever. This set of initial values, along with the real-world time at which the generator is set to this state, is known as the PN generator key. Two identical SS systems (same carrier frequency, same modulation format) can share a common channel by simply using different keys. This format is called code division multiple access (CDMA) and is becoming popular in a variety of new communication systems. 

A request was made to the Telecommunications Industry Association (TIA), which is a standards body, to develop a digital specification based on the UPR. In 1991, the TIA released Interim Standard 54 (IS-54), which uses time division multiple access (TDMA) technology. In 1993 the TIA also approved IS-95, a digital standard based on code division multiple access (CDMA) technology. Debate continues within TIA over a third technology, extended time division multiple access (E-TDMA), which has been promoted by Hughes Network Systems. 

Code division multiple access (CDMA) A multiplexing technique where the signal intelligence is mixed with a randomlike code and then spread over a wide range of frequencies. 

Basics of Code Division Multiple Access (CDMA), RaghuveerRao and Sohail Dianat, Vol. TT67... 

Code Division Multiple Access -three carriers, three channels... 

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