Multi-path CDMA [Code Division Multiple Access]

The animated TECHTip Tutorial is available here.

Multi-path CDMA [Code Division Multiple Access] improves performance (reduces the impact of multi-path) by jumping or hopping (shifting frequencies).

The user signals are summed (encapsulated) and integrated as one stronger signal which increases signal quality.

Frequency Re-use is designed to conserve or reduce the number of frequencies in any geographic area allowing frequencies to be re-used (used again). AMPS [Analog Mobile Phone Service], TDMA [Time Division Multiple Access], and GSM [Global Service for Mobile] have a N=7 Re-use Pattern (seven frequencies reused). That is, frequencies are separated by distance but reused three or more cells away. CDMA uses an N=1 Frequency Re-use Pattern. That is, all the frequencies are in use at the same time. The signals shift-hop from one to another to avoid multi-path interference.

About TECHtionary
TECHtionary is the world’s first and largest animated library/magazine on technology - Web Hosting Magazine’s Editor’s Choice for Technical Help. TECHtionary produces white papers, magazine articles, in-depth product reviews, training tools, and custom animations. Call 303-594-3047 or e-mail  cross at gocross.com to let us show you how we can help you with exciting new tutorials on your products and services.

[tags]tdma,gsm,multi-path cdma,code division multiple access,amps,analog mobile phone service,time division multiple access,global service for mobile[/tags]