3GRead People Like A Book

There are different platforms or types of 3G technology. Each manufacturer

has created and developed some of the most innovative products and mobile

handsets. The CDMA2000 is one of the 3 major types. It has different

features and tools also that will surely give you a whole new experience,

unlike other technologies before it. Here are the details on how to make

the most out of the specification.

Introduction

The CDMA2000 specification was created and developed by the Third

Generation Partnership Project 2 or 3GPP2, which is a partnership that

consists of 5 telecommunication standard bodies: TTC and ARIB in Japan, TTA

in Korea, TIA in North America and CWTS in China. CDMA2000 has been

implemented to a lot of networks as an evolutionary step from CDMAOne.

CDMA2000 gives a full backward compatibility with IS-95B.

CDMA2000 is not contained only into a single IMT-2000 and, although

managers have the ability to overlay ACDMA2000 1x system. The system backs

144 Kbps at present, with data rates running up to 307 Kbps in the near

future, over the other present CDMAOne network.

Evolving the Technology

CDMA2000 1xEV is the other name of the evolved CDMA2000. This technology

will be implemented via a number of steps, namely the 1xEV-DV and 1xEV-DO.

1xEV-DO which represents 1x Evolution Data Only. 1xEV-DV represents 1x

Evolution Data and Voice. The two 1xEV CDMA2000 evolution steps will use a

carrier standard 1.25 Mhz. 1xEV-DO will most likely be available for the

operators CDMA2000 during 2002. The solutions for 1xEV-DV were made

available in 2004.

CDMA2000 3x and CDMA2000 1x EV-DO are approved by ITU and IMT-2000 3G

basics. CDMA2000 3x is a portion of what the ITU has called IMT-2000 CDMA

MC or Multi Carrier. This uses a lower than 5 MHz spectrum via 3x 1.25 MHz

channels to provide speeds of more than 2 Mbps.

The Technical Summary

As for the summary of the CDMA2000, the frequency band can be any type or

existing and. The minimum frequency band needed for 1x is 2 x 1.25 MHz. For

3x, the required is 2 x 3.75 Mhz. Chip rate for 1x is 1.2288. For 3x, chip

rate is 3.6864 Mcps. The maximum user data rate for 1x is 144 Kbps at

present and 307 Kbps in the near future. As for 1xEV-DO, the max rate is

384 Kbps to 2.4 Mbps. The frame length is 5 ms, 10 ms or 20 ms. As for

power control rate, it is at 800 Hz. The spreading factors are 4 256 UL.

On WCDMA

W-CDMA in 3G is known as wideband code division multiple access. It is one

of the main technologies used for the implementation of 3G cellular

systems. It is founded on the radio access method give by ETSI Alpha group

with the features and specifications finalized in 1999. The implementation

of W-CDMA will cover very technical details. The complexity of the systems

can be seen from various angles. These include the complexity of the

receiver, the complexity of the overall system and the complexity of the

single algorithm.

In W-CDMA, the interface allows users of 3G to instantly send and get

various data rates. UMTS networks will need the support of all current 2G

services and several new services and applications. You should consider if

this will be the right technique for you.