Advanced Technology Essay

919 words - 4 pages

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2G, 3G and 4G TECHNOLOGY
2G Technology
2G refers to second generation wireless telecommunication technology. While its predecessor, 1G, made use of analog radio signals, 2G uses digital radio signals. Based on what type of multiplexing is employed, 2G technologies may be categorized by whether they are based on time division multiple access (TDMA) or code division multiple access (CDMA). Code division multiple access is a digital radio system that transmits streams of bits (PN Sequences). It permits several radios to share the same frequencies. Unlike time division multiple access, all radios can be active all the time, because ...view middle of the document...

This meant that cells could be smaller, so more cells could be placed in the same amount of space.

Advantages
2G technology has many advantages over 1G technology such as follows:
* The battery life of a 2G handset lasts longer, due to the lower-powered radio signals.
* 2G offers additional services such as SMS and e-mail through digital signals
* Its lower power emissions also made 2G handsets safer for consumers to use.
* Error checking, a feature allowed by digital voice encoding, improved sound quality by reducing dynamic and lowering the noise floor.

3G Technology
3G refers to the third generation of developments in wireless technology, especially mobile communications. 3G is generally considered applicable mainly to mobile wireless; it is also relevant to fixed wireless and portable wireless. 3G networks enable network operators to offer users a wider range of more advanced services while achieving greater network capacity through improved spectral efficiency. Services include wide-area wireless voice telephony, video calls, and broadband wireless data, all in a mobile environment.
System Capacity
3G technology provides you with the data transmission speed of up to 2Mbps when you are using the phone in stationary mode. It also provides high degree of connectivity and increased networking and most importantly the resistance to noise. The technology has in fact increased the bit rate thus enabling the service providers to provide high speed internet facilities, increased call volumes and host of the multimedia applications to their customers. In fact, the capability to support circuit and packet data at high bit rates are:
* 144 kilobits/second or higher in high mobility (vehicular) traffic
* 384 kilobits/second for pedestrian traffic
* 2 Megabits/second or higher for indoor traffic

Advantages
3G is an improvement over 2G providing wireless access to the data and information to the users from anywhere and...

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