In CDMA the signal is brodcasted over a range and the cell collects all that. It takes the entire allocated frequency range for a given service and multiplexes information for all users across the spectrum range at the same time.
Pros: excellent national coverage (larger coverage area than GSM), calls can be placed in lower-signal strength situations, better reception/coverage in tunnels and rural areas, quicker to offer 3G services.
Cons: poor international coverage, not as easy to switch devices. CDMA carriers usually require proprietary handsets that are linked to one carrier only and are not card-enabled. To upgrade a CDMA phone, the carrier must deactivate the old phone then activate the new one. The old phone becomes useless.
No comments:
Post a Comment