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.

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