What is CDMA?

CDMA is now more popular and applied in many countries as network phone operator.

CDMA is stand for (Code-Division Multiple Access) refers to any of several protocols used in so-called second generation (2G) and third-generation (3G) wireless communication. In the words suggests, CDMA is a form of unification, which allows many signals to the utilization of a transmission channel, optimizing the use of the available tape. The technology used in very high frequency (UHF) cellular phone system in the 800-MHz and 1,9 GHz-bands.

CDMA work analog to digital conversion (ADC) in combination with spread spectrum technology. Audio is the first digitized in binary components. The frequency signal is then transmitted to vary depending on the particular model (code) so that it can only be intercepted by the receiver, whose frequency response is programmed with the same code, for it is precisely along with frequency transmitter . There is a possibility the frequency of trillions-s sequencing codes, which strengthens privacy and makes cloning difficult.

The CDMA channels to be wide 1,23 MHz. CDMA networks use a scheme called soft Handoff, which minimizes signal breakup sight as a shift from one cell to another. The combination of digital and spread-spectrum types supports several times as many traffic signals unit as analog modes. CDMA is compatible with other cellular technologies This enables roaming throughout the country.

The original CDMA standard, also known as CDMA one and more common cell phones in the U.S., offers transmission speeds of only 14,4 Kbps in its sole form of a channel and to 115 Kbps in eight-channel form. CDMA2000 and ultra-wideband CDMA data gives many times more quickly.