cdmaOne
IS-95
Technology Overview
cdmaOne was the first cellular standard implementing the CDMA multiple access scheme, also known as IS-95. Individual channels are separated from each other by individual orthogonal codes. Within this standard all services, including speech and data, are circuit-switched with a maximum data rate of either 9.6 kbit/s or 14.4 kbit/s on each channel. With the IS-95-B technology extension many operators also offer 64 kbit/s packet-switched data, in addition to voice services. A bandwidth of 1.25 MHz results in up to 61 channels under optimal channel conditions. cdmaOne is contained as a subset in all CDMA2000 standards up to the latest 1xEV-DO Rev. B standard.
Rohde & Schwarz offers a broad test and measurement portfolio for cdmaOne. Numerous systems for signal generation, spectrum analysis, radiocommunications testing and network verification are applied by equipment manufacturers and network opeators worldwide.
Deployment Scenario
cdmaOne is applied in many networks all around the world where voice is the predominant service required.
Key Parameters
| cdmaOne | |
|---|---|
| Frequency Range |
Show / Hide
|
| Modulation | QPSK/OQPSK |
| Multiple Access | CDMA/FDMA |
| Duplex (Uplink/Downlink) | FDD |
| Channel Bandwidth | 1.25 MHz |
| Peak Data Rate | 14.4 kbit/s
(IS-95-A) 115.2 kbit/s (IS-95-B) |
Standardization
cdmaOne is written and maintained by the Telecommunications Industry Association (TIA). Further information on the standard is available at www.tiaonline.org.
