cdmaOne
IS-95
Technology Overview
cdmaOne was the first cellular standard to implement the CDMA multiple access scheme, also known as IS-95. Individual channels can be distinguished from one another by means of unique 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 included as a subset in all CDMA2000® standards up to the latest 1xEV-DO Rev. B standard.
Deployment Scenario
cdmaOne is applied in many networks all around the world where voice is the predominant service required.
Rohde & Schwarz Test Solutions
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 operators worldwide.
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 has been specified and is maintained by the Telecommunications Industry Association (TIA). Further information on the standard is available at www.tiaonline.org.
