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three times wider coverage, 40 times capacity, and "CD" quality sound. For example, the 13 kbps vocoder provides better

sound quality, but reduces system capacity as compared to an 8 kbps vocoder.

CDMA Benefits

When implemented in a cellular telephone system, CDMA technology offers numerous benefits to the cellular operators and their

subscribers. The following is an overview of the benefits of CDMA. 1.Capacity increases of 8 to 10 times that of an AMPS

analog system and 4 to 5 times that of a GSM system 2.Improved call quality, with better and more consistent sound as

compared to AMPS systems 3.Simplified system planning through the use of the same frequency in every sector of every cell

4.Enhanced privacy 5.Improved coverage characteristics, allowing for the possibility of fewer cell sites 6.Increased talk time for

portables 7.Bandwidth on demand

Click below for more information about:

Spread Spectrum Techniques

Spreading Codes

Power Control

Handoff

Forward CDMA Channel

Frequency Plans

Walsh Functions

Short Code

Reverse CDMA Channel

Long Code

Long Code Mask

Reverse Spreading

Linear Feedback Shift Registers

System Time

Forward Spreading

Coverage-Capacity Tradeoff in the Reverse Link

Spreading Bandwidth

Optimum Bandwidth for CDMA

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