Cd Ma 2000 Multi Service example essay topic

One winsome technical aspect is that the cd ma 2000 use QPSK Walsh modulation, which doubles the number of Walsh codes available compared to other systems like GPRS or IS-95 and increases processing gain in the same time. Each physical channel is spread with a Walsh code word to provide orthogonal channelization among different channels and different users. The channels are code-multiplexed with independent gain, which allows the support of multiple services in an efficient manner. The QoS requirements can then be set independently for optimal allocation of reverse link resources (Dahlman, 73). I should also note that for multi-carrier CDMA channel, the user data is de multiplexed onto N carriers, after scrambling with the long code corresponding to user m. On each carrier, the de multiplexed bits are mapped onto I and Q and followed by Walsh spreading, PN spreading and frequency modulation as in the direct spreading channel.

For the common uneducated user this means that cd ma 2000 provides for enhanced protection of data so needed in wireless internet or cell phones. For the cd ma 2000 company it means that the internal controls are maintained and the users are properly served at a cheap price (Balachandran, 38). The creators of the cd ma 2000 in order to improve the performance of the forward link in a low-mobility environment, incorporated in their creation that cd ma 2000 represents the fast forward link power control. Similar to the operation of the cdmaOne reverse link, the mobile station measures the forward link traffic channel power and issues a "power up" or "power down" command back to the base station based on the measurement (Knisely, 69).

Performance results indicate that a significant improvement is achieved at low speeds which allows the cd ma 2000 users to enjoy high productivity during rush hours when the cd ma 2000 channel is overwhelmed or for technical reasons the speed is low. For high-speed data transfers, which typically occur in low-mobility environments, this improvement in performance is crucial in providing higher forward link capacity, which for most users is reflected in ability to use their wireless internet / phone at a great distance from the cell phone towers (Pittampalli, 15). It is a common knowledge that CDMA 2000 is the 3rd Generation solution based on the system called IS-95. Unlike some 3 G standards, It is an evolution of an existing wireless standard. CDMA 2000 supports 3 G (third generation) services as defined by the International Telecommunications Union (ITU) for IMT-2000.3 G networks will deliver wireless services with better performance, greater cost-effectiveness and significantly more content (Balachandran, 40).

The goal is access to any service, anywhere, anytime from one terminal - true converged, mobile services. CDMA 2000 is one solution for wireless operators who want to take advantage of the new market dynamics created by mobility and the Internet. CDMA 2000 is both an air interface and a core network solution for delivering the services that customers are demanding today. These services are sometimes referred to as 3 G (Pittampalli, 17).

CDMA 2000 and 3 G are synonymous. CDMA 2000 is designed to mitigate risks, protect investments and deliver significant performance boosts to operators as they evolve their networks to offer 3 G services. CDMA 2000 networks are backward compatible to cdmaOne deployments, protecting operator investments in cdmaOne networks and providing simple and cost-effective migration paths to the next generation. In addition, CDMA 2000 networks offer voice quality and voice capacity improvements, and support for high speed and multimedia data services (Dahlman, 75). Speaking about the benefits the new system provides because of its multi service aspects, one should remember the following. Cdma 2000 uses the backward compatibility with cdmaOne which allows the users to cheaply migrate to the 3rd generation system.

The voice quality and capacity is certainly improved for the fact that cd ma 2000 offers at least twice the same capacity of the cdmaOne. The wireless internet data can be transmitted at a rate from 144 kips to 2 Mbps with hardly any interruptions. The cd ma 2000 multi service allows for simultaneous voice / data support of multimedia applications that gain more and more popularity not only with the internet but also with the mobile phones. Cdma 2000 as a customer lure offers extended battery life, smart antennas (follow-me-service) and the hot spot coverage (aka spot beams).