Mobile Phone Network GSM, CDMA And 3G Comparison

Published: 15th February 2011
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GSM digital mobile communication system is composed of major European telecom operators and manufacturers a standardized form designed by the Commission, which is based on cellular systems evolved. Including GSM900MHz, GSM1800MHz and GSM1900MHz several bands. GSM system has several key features: ability to copy good security, network capacity, number of resource-rich, call clear and strong stability are less vulnerable to interference, sensitive information, call dead less mobile power base and so on.

Is the abbreviation for Code Division Multiple Access CDMA (Code Division Multiple Access), which is a branch of the digital technology - developed spread-spectrum communication technology as a new and sophisticated wireless communications technology. It can meet the market for mobile communications capacity and quality of high demand, with high spectrum efficiency, voice quality, confidentiality, call drop rate is low, electromagnetic radiation, large capacity, wide coverage and other characteristics, can significantly reduce investment and reduce operating costs.

3G is the third generation mobile communication technology, is a generic term for next-generation mobile communication systems. 3G systems to provide users with a better voice, text and data services. Compared with the existing terms of the technology, 3G technology, the main advantage is to greatly increase the system capacity, improve communication quality and data transfer rate. Besides using the seamless roaming between different network technology, wireless communication systems and Internet connection up to the end user can provide more advanced mobile services.

Compared with GSM phones CDMA phones, CDMA mobile phone has the following advantages: CDMA mobile phones using advanced switching technology: the soft switch technology (that is, good continuation after the switch is to interrupt), making the CDMA mobile phone and fixed telephone calls can be comparable; use CDMA network operators, reduced investment, which reduced tariffs for the CDMA mobile phone reserved space; frequency of communication by using the extension based on a modulation and multiple access communication, and its capacity 10 times higher than analog technology, about 4 times more than GSM networks; CDMA-based broadband technology allows video applications in mobile communication possible, so that the phone calls and send text from the only information service to the narrow bandwidth multimedia applications.

Currently, the main global mobile phone standard, including GSM, CDMA, 3G three, since the advent of mobile phones has experienced a first-generation analogue phones (1G), second-generation GSM, TDMA digital mobile phones, etc. (2G), 2.5 generation mobile communication technology CDMA and third generation mobile communication technology 3G.

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