Cell phones use radio technology. the primary generation of cell phones used the analog system, with a definite variety of channels in every cell. However, the analog system didn’t have the technology to compress the signals that were transferred between the cellular phone and also the cellular network, that created a system overload. A system with a lot of capability was required.
Digital technology uses radio technology in a very totally different approach than the analog system did. Second-generation cell phones use the digital gear, that magnified quantity of accessible channels and so magnified the quantity of calls which will be command at the same time. this can be additionally true for cable firms, that use the digital system to suit a lot of channels into every information measure.
Digital cell phones use identical radio technology as analog phones, however, they use it in a very totally different approach. Analog systems don’t totally utilize the signal between the phone and also the cellular network analog signals can not be compressed and manipulated as simply as a real digital signal. will be} the rationale why several cable firms area unit change to digital so that they can work a lot of channels at intervals a given information measure. it’s wonderful what quantity a lot of economical digital systems will be.
Digital phones convert your voice into binary info (1s and 0s) then compress it. This compression permits between 3 and ten digital cell-phone decisions to occupy the house of one analog call.
Many digital cellular systems have faith in frequency-shift keying (FSK) to send knowledge back and forth over AMPS. FSK uses 2 frequencies, one for 1s and also the different for 0s, alternating space between the 2 to send digital info between the cell tower and also the phone. Clever modulation and coding schemes area unit needed to convert the analog info to digital, compress it and convert it back once more whereas maintaining a suitable level of voice quality. All of this implies that digital cell phones have to be compelled to contain plenty of process power!