About CDMA

CDMA (Code Division Multiple Access) is different from traditional technologies as it assigns the right to use both time-slot and frequency to all users simultaneously. To do this, it uses a technique known as Spread Spectrum. In effect, each user is assigned a code, which spreads its signal bandwidth in such a way that only the same code can recover it at the receiver end.

CDMA technology consistently provides better capacity for voice, video and data communications than other commercial mobile technologies, allowing more subscribers to connect at any given time, and it is the common platform on which 3G technologies and applications are built.

In a world of finite spectrum resources, CDMA enables more people to share airwaves at the same time than other technologies. Thus, the technology offers spectrum efficiency and unmatched data capabilities.

CDMA was adopted by the Telecommunications Industry Association (TIA) in 1993. In September 1998, only three years after the first commercial deployment, there were 16 million subscribers on cdmaOne systems worldwide.  Today, several operators worldwide are deploying CDMA solutions.

The CDMA air interface is used in both 2G and 3G networks. 2G CDMA standards are branded cdmaOne and include IS-95A and IS-95B. CDMA is the foundation for 3G services: the two dominant standards, CDMA2000 and WCDMA, are based on CDMA.

CdmaOne: The Family of IS-95 CDMA Technologies .

CdmaOne describes a complete wireless system based on the TIA/EIA IS-95 CDMA standard, including IS-95A and IS-95B revisions. It represents the end-to-end wireless system and all the necessary specifications that govern its operation. CdmaOne provides a family of related services including cellular, PCS and fixed wireless (wireless local loop).

CDMA2000: Leading the 3G revolution

CDMA2000 1X is an International Telecommunications Union (ITU) approved 3G wireless communications standard that provides voice and data capabilities within a standard 1.25 MHz CDMA channel for outstanding spectral efficiency and flexibility.  CDMA2000 builds on earlier CDMA cdmaOne technology to provide a natural evolution to 3G services. It nearly doubles voice capacity over second-generation (2G) cdmaOne networks and supports high-speed data services, offering a peak data rate of 153 kbps. They deliver increased network capacity to meet growing demand for wireless services and high-speed data services

CDMA2000 was first commercialized in October 2000 in South Korea. Since then, several operators (including Rainbownet) on six continents have launched CDMA2000 services. Networks and devices supporting these services are backward compatible with those based on 2G cdmaOne, preserving operator spectrum and equipment investments, while providing best-in-class voice capacity and effective data capability.

Rainbownet CDMA Solution

Rainbownet has deployed the CDMA2000 1X solution with robust forward evolution to all Future Oriented Services. This is a state-of-the-art network supporting Next-Gen services and requirements.

Rainbownet deployed its first CDMA network in 2003, a Synchronous CDMA (S-CDMA) network supplied by L3 technologies of the USA.

On March 2005, it deployed a CDMA2000 1x network, supplied by renowned vendor Huawei Technologies of China, in the five (5) states of the South-East of Nigeria, providing digital quality voice and high-speed data capability to the customers.

It has also deployed a backhaul transmission system connecting the 5 states via a self-healing Super-PDH ring.

These infrastructure and services are supporting its reliable market brand across the service regions driving its Cs.