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An Introduction
To
CDMA Technology


Introduction
Short for Code Division Multiple Access
Developed by US company -QUALACOMM
Digital technology for delivering mobile telephone services
uses spread-spectrum techniques


IS-95 CDMA

is based on IS-95 Technology
Supports 95 million subscribers worldwide
Network operate in 800 & 1900 freq. band
Provides voice & data services having speed upto 64 kbits/sec
SMS services also


Benefits of CDMA
Increased Capacity
Improved Quality
Simplified System Planning
Enhanced Privacy
Improved Coverage
Increased Portable Talk Time
Bandwidth on Demand



CDMA-Applications
CDMA for Cellular
CDMA-Short Message Service
Over-the-Air Activation
CDMA Data and Fax
Subscriber Access Control
CDMA for Personal Communications Services


Conclusion

Technology of choice for 3G generation because of itâ„¢s
Greater total capacity
Outstanding voice quality
Fewer dropped calls

RF planning and implementation is simplified by itâ„¢s
Capability of re-using single cell frequency
non-contiguous bandwidth requirement
Itâ„¢s use in satellite communication is of great importance