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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.
Knowing the Different 3G Types
3G, just like other types of technologies also come in various kinds.
You can take advantage of the many features and developments by simply
knowing how one type differ from the other. You can save more money by
investing only in the right product that actually offers you all the
right tools and applications for personal use and work. You also need
to know a bit about the existing networks to know how much speed you
are actually getting.
The Types
The two main types of 3G are UMTS or Universal Mobile Telephone Service
and CDMA 2000. UMTS is spread out over the present GSM networks, while
CDMA2000 takes 3G speeds to CDMA networks. The two types have a couple
of high-speed misses, the voice-plus-data 1xEV-DV and the data-only
1xEV-DO, which are currently available in chosen suburban regions and
major cities.
More expansion is underway in the near future. The speeds for both UMTS
and CDMA2000 are estimated to be about the same as a regular DSL.
AT&T has also released a 3.5G speed network in 2006. This is called
HSDPA, which stands for High-Speed Downlink Packet Access. This begins
at a speed of about 1.8 Mbps up to an excellent 14.4 Mbps. More devices
and networks are being developed at present, introducing the 4G
technology, such as WiMax.
3-G Capability
To get the benefits and features of 3G technology, individuals will
need a 3G phone or smartphone. The start was kind of slow, but there is
now a wide array of handsets, featuring 3G technology from different
carriers. All the mobiles will try to provide support for the recent 3G
networks. These appear in different styles, ranging from trendy to
stylish. Some of the best examples include the Samsung SPH-M520 and LG
Venus VX8800. The best 3.5G phones are supported by HSDPA phones, such
as the AT&T Tilt and the LG CU720 Shine. Prices of the products
will differ, depending on the available features and the brand.
The Different Technologies
Both PC and laptop users can get benefits from 3G networks for mobile
broadband, excluding a Wi-Fi network. Individuals will only need a
carrier-supplied PC Card. There are PC cards available for both EV-DO
and HSDPA networks. Knowing the evolution will help you choose the
right product and assess how much you are actually getting.
1G technology include AMPS, the speed is still very slow compared to
today's standards with voice only analogue feature. The 2G technology
includes iDen, CDMA and GSM, with speeds less than 29 Kbps. Included
features are the push-to-talk, voice, conference calls, caller ID and
SMS. 2.5G technology includes EDGE, GPRS and 1x RTT, featuring speeds
from 30 Kbps to 90 Kbps. The included features are MMS, web browsing,
images, short video and audio clips, applications, ring tone downloads
and games.
Recent Technologies
3G technology includes UMTS and 1xEV-DO ranging from 144 Kbps up to 2
Mbps. Some of the included features are full-motion video, quick web
browsing, 3D games and streaming music. 3.5G technology includes HSDPA
which is an upgrade for UMTS and 1x EV-DV, with speeds ranging from 384
Kbps up to 14.4 Mbps. Features include video conferencing and on-demand
video. 4G and more features speeds from 100 Mbps up to 1 Gbps.
Some of the outstanding features include high quality video
conferencing, high quality streaming video and voice-over-IP telephony.
More on 3G: 2G to 3G Development 3G Compatibility 3G history 3G Networks 3G Now 3G Phones 3G Platforms 3G uses and features Advantages of 3G CDMA 2000 Choosing a 3G unit Evolution of Smart Phones 3G Demonstration An Introduction to 3G UMTS Uses of 3G WCDMA
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