The document discusses CDMA2000, a 3G cellular technology that provides an evolutionary upgrade path from 2G CDMA. It spreads signals across 1.25MHz of spectrum to transmit uniquely encoded signals simultaneously. CDMA2000 supports high-speed packet data through standards like 1X EV-DO that enable up to 2.4Mbps speeds. While it offers advantages like efficient spectrum use and support for advanced services, disadvantages include potential channel pollution from multiple signals and limited international roaming without multimode devices.

1. Presentation by
Vivek kumar
1238756
Rajesh kumar
1238736
ECE 6th ‘A’

2. What is CDMA
CDMA is a high speed data and voice network solution
for low cost easy to deploy high performance services.
CDMA can support high volume of voice and data
traffic.
Instead of being limited to narrow channel structure
in a given frequency CDMA spreads signal across 1.25
MHz of spectrum and simultaneously trasmits
uniquely encoded and encrypted signals over same RF
carrier.
Due to its efficient use of spectrum to provide high
quality voice and data services CDMA can be utilised
for fixed voice and data services.

3. Facts about cdma2000
CDMA is a technology for the evolution of IS-95/IS-
95A to 3G services.
The CDMA2000 cellular technology provides an
evolutionary high data rate upgrade path for current
users of 2G(IS-95)and 2.5G(IS-95A)CDMA technology.
CDMA2000 represents a family of standards.
A key component of CDMA2000 system is a new
packet core network(PCN) that allows for the delivery
of packet data with high speed and better security.

4. Multicarrier modulation is applied to 3G voice
oriented cellular network using CDMA technology.
CDMA2000 employs a multicarrier operation in which
a user is allowed to use 1,3,6,9 of the CDMA one
channels to support a more reliable voice and variety
of data channels.
The main advantage of using multicarrier modulation
is to provide higher data rates for data applications,
wider BW and consequently better voice quality and
backward compatibility with existing CDMA system.
In CDMA2000 using 16-QAM digital modulation
technique the maximum data rate is increased.

5. CDMA2000 Family of 3G standards
CDMA2000 1X :double voice capacity; upto 307
kbps packet data speed; supports advanced
services like MMS, games, location services,
picture and music download.
CDMA2000 1X EV-DO: optimised for packet data
services upto 2.4 Mbps, “always on” service
supporting internet and intranet.
CDMA2000 1X EV-DV: will provide integrated
voice with high speed packet data services such as
video conferencing at 3.09 Mbps.

6. KEY FEATURES
Leading performance.
Efficient use of spectrum.
Support for advanced mobile services.
CDMA2000 technology are compatible with IP having
more flexibility and higher BW efficiency.
Device selection: CDMA2000 offer the broadest
selection of mobile devices and has a significant cost
advantage.
CDMA2000 have been designed for urban as well as
remote rural areas for fixed wireless, WLL, limited and
full mobility application in multiple spectrum bands.

7. ADVANTAGES
Superior voice quality.
High speed broadband data connectivity.
Flexible network architecture with connectivity to
ANSI-41, GSM-MAP and IP based networks.
Application, user and flow based quality of
service(Qos).
Flexible spectrum allocation with excellent
propagation characteristics.
Improved security and privacy.
Lower total cost of ownership.
Multi-mode, multiband global roaming features.

8. Disadvantages of CDMA2000
Channel pollution: there are too many signals
from cell sites in subscribers phone, but none is
dominant –degrading call quality.
International roaming: another disadvantage of
this technology is the lack of international
roaming capabilities and only CDMA2000 device
that can be used internationally must also have a
GSM radio.