 - FDMA (frequency division multiple access) is the division of the frequency band allocated for wireless cellular telephone communication into 30 channels, each of which can carry a voice conversation or, with digital service, carry digital data.
FDMA is a basic technology in the analog Advanced Mobile Phone Service (AMPS), the most widely-installed cellular phone system installed in North America. With FDMA, each channel can be assigned to only one user at a time. FDMA is also used in the Total Access Communication System (TACS).
The Digital-Advanced Mobile Phone Service (D-AMPS) also uses FDMA but adds
time division multiple access (TDMA) to get three channels for each FDMA channel, tripling the number of calls that can be handled on a channel.
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Learn more about Cell Phones and Cellular Technology |
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| Cellular bill consolidation: Making the most of managed mobility: Cellular bill consolidation can provide companies with low-overhead cellular management approaches that deliver predictable costs. |
| Cellular broadband is mobile and reliable: Cellular broadband is available from most of the major carriers now and in this guest column, John Shelper says it's reliable, available and relatively cheap. |
| Dual-mode Wi-Fi and cellular phones to grow: Dual-mode Wi-Fi and cellular VoIP phones are poised for huge growth, while mobile and single-mode phone sales continue to climb. |
| Mobile Radio Systems: This chapter is an intro to the various mobile radio systems. It provides a foundation for comparing competing mobile radio access systems for supporting mobile broadband services. |
| Cost-effective mobile connectivity: As companies facing mounting mobile connectivity costs you need to make sense of the available mobile connectivity options and reduce costs before they get out of control. |
| FCC releases list of 700MHz spectrum auction bidders: As the auction approaches, the FCC releases the list of bidders for rights to the 700MHz wireless spectrum. |
| Wireless carriers: The good, the bad, and the just plain annoying: It's not unusual for customers dealing with their wireless carriers to get bad service, but in his latest editorial Adama Brown recounts an especially bad example. |
| Managed mobile services: This managed mobile services series, examines services for device management, email, enterprise applications, and cellular telephony. It concludes with a best practices guide. |
| CONTRIBUTORS: |
Washington Rodriguez Sanchez |
| LAST UPDATED: |
10 Apr 2003
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