The research paper CDMA Technology CSE & IT Seminar Topics delves deeper into the CDMA ( code division multiple access) technology. It says that CDMA TECHNOLOGY makes existing mobile handset more efficient and attractive. CDMA (3G) mobile devices and services will transform wireless communications into on-line, real-time connectivity. 3G wireless technology will allow an individual to have immediate access to location-specific services that offer information on demand.
This research abstract presents an overview of current technology trends in the wireless technology market, a historical overview of the evolving wireless technologies and an examination of how the communications industry plans to implement 3G wireless technology standards to address the growing demand for wireless multimedia services.
About CDMA: It is suggested in the research abstract that it was the founders of QUALCOMM who realized that CDMA technology could be used in commercial cellular communications to make even better use of the radio spectrum than other technologies. They developed the key advances that made CDMA suitable for cellular, then demonstrated a working prototype and began to license the technology to telecom equipment manufacturers. CDMA was developed by QUALCOMM Incorporated, a company in San Diego, California. QUALCOMM engineers decided to do something different and applied spread spectrum techniques to a multiple access system, which ultimately became CDMA.
Scope of CDMA: The paper suggests that CDMA offers an answer to the capacity problem. The paper says that the key to its high capacity is the use of noise-like carrier waves, as was first suggested decades ago by Claude Shannon. Instead of partitioning either spectrum or time into disjoint “slots” each user is assigned a different instance of the noise carrier. While those waveforms are not thoroughly orthogonal, they are nearly so. Practical application of this principle has always used digitally generated pseudo-noise, rather than true thermal noise.
The research abstract concludes on a note suggesting that interworking between access networks implementing enhanced versions of current technologies for broadcast cellular and short-range communications should provide a good first solution for CDMA(3G) services. It suggests that this technology map can be extended to include access technologies for transmission at more than 50 Mbit/s for fast moving users as well as ultra wide band systems for wide area coverage.
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