cdma2000 / CDMA Test
As industry needs have matured and evolved, so has the Code-Division Multiple Access (CDMA) technology. As a digital cellular technology based on the TIA/EIA IS-95 CDMA standard, including IS-95A and IS-95B revisions, CDMA was first introduced as a solution for voice communication. It uses direct sequence modulation with digital codes to spread its spectrum.
As user equipment and applications evolved, CDMA gave way to cdma2000, a technology developed through the Telecommunication Industry Alliance. cdma2000 supports circuit-switched voice communications as well as packet data speeds of up to 307 kbps in a single 1.25 MHz channel.
Another technology to evolve from CDMA/cdma2000 is 1xEV-DO (1x Evolution, data only). Details on this enhancement to cdma2000 air interface technology, which is optimized for packet data transfer, can be found on the Keysight 1xEV technology page
Keysight Technologies provides cdma2000/CDMA products, solutions and services for engineers and technical managers involved in the design, integration, manufacturing, and performance of your next generation networks. Greater insight. Greater confidence. Accelerate next-generation wireless.
TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) is a Chinese-developed 3G standard that has been adopted by ITU and by 3GPP as one of the worldwide 3G standards. It is a time division duplex (TDD) standard. This ability to transmit and receive on the same frequency makes TD-SCDMA well suited for data-intensive applications such as mobile internet access and multimedia services.
Keysight has been involved in the China TD-SCDMA indoor trials and field trials, providing products and test solutions covering all areas from component and sub-systems design, to handset and base station equipment manufacturing and network deployment. Greater insight. Greater confidence. Accelerate next-generation wireless.
The expansion and upgrading of W-CDMA networks worldwide to support HSDPA and HSUPA (collectively HSPA) is a substantial investment by the network operators. Handset design and development needs to keep pace to ensure end-user customers upgrade their phones and buy and use the new network services that they support.