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Why is the network expansion of CDMA much fast/cheaper than GSM?

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Why is the network expansion of CDMA much fast/cheaper than GSM?

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CDMA is a wireless method of allowing many people to communicate on the same channel. This is called multiple access or the “MA” part of CDMA. It should not be confused with the mobile phone standards called cdmaOne and CDMA2000 (which are often referred to as simply “CDMA” from Qualcomm). CDMA is a form of “spread-spectrum”. Other forms of wireless multiple accesses are TDMA (time division) and FDMA (frequency division). To understand the analogy, you have many people in a room and they all want to talk. TDMA is only one talk at a time but at a small allotted time is allowed. FDMA is all talk at the same time but some uses a high pitch voice and other uses a low pitch voice and each train their ears to ignore the other pitches. CDMA being a spread spectrum, everybody talks at the same time but uses a different code set, sort of like different languages. However the talking is repeated many times. By repeating many times you can make out the whole sentence. CDMA is not exactly repeatin

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