Each cell in a cell cluster has a transceiver with the necessary transmitting power and mobile units distributed around the cell's coverage area. How does CDMA work?Ĭell clusters form the cellular structure of wireless CDMA networks. There are trillions of possible frequency sequencing codes, which enhances privacy and makes cloning difficult. This enables the signal to be intercepted only by a receiver whose frequency response is programmed with the same code, following along with the transmitter frequency. The frequency of the transmitted signal is then made to vary according to a defined pattern code. Audio input is first digitized into binary elements. ![]() ![]() The technology is used in ultra-high-frequency (UHF) cellular phone systems in the 800 megahertz (MHz) and 1.9 gigahertz (GHz) bands.ĬDMA employs analog-to-digital conversion (ADC) in combination with spread spectrum technology. As the term implies, CDMA is a form of multiplexing, which allows numerous signals to occupy a single transmission channel, optimizing the use of available bandwidth. What is CDMA (Code-Division Multiple Access)?ĬDMA (Code-Division Multiple Access) refers to any of several protocols used in second-generation (2G) and third-generation (3G) wireless communications.
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