- A frequency spectrum is a scientific method of plotting and classifying electromagnetic waves as they occur in space and in the everybody environment.
- Actually calculating the frequency of various transmissions can be a complex science and usually involves intensive formulas and measuring equipment.
- As a concept, though, the spectrum itself is relatively straightforward.
- Anything that gives off energy does so at a particular frequency.
- Light, sound, television and radio transmissions are some of the most common: X-rays, microwaves and infrared signals are also included.
- The frequency spectrum is how these and other emissions are plotted and classified.
Before learning about 2G, 3G, 4G we have to know about 'G' or 'Generation'
- In a nutshell each Generation is defined as a set of telephone network standards. Which detail the technological implementation of a particular mobile phone system.
- Today mobile operators have started offering 4G services in the Country. A higher number before the 'G' means more power to send out and receive information and therefore the ability to achieve a higher efficiency through the wireless network.
- 1G was the first Generation of mobile networks. Here basically radio signals are transmitted in 'Analogue' form and expectedly, one was not able to do much other than sending text messages and making calls.
- But the biggest disadvantage, came in the form of limited network availability. As in the network was available only with in the country.
- 2G networks on the other hand, were based on a narrow band digital networks. signals were transmitted in the digital format and this dramatically improved the quality of calls and reduced the complexity of data transmission.
- The other advantage of the 2G network came, In the form of Semi Global Roaming System, Which enabled the connectivity all over the world.
- 3rd Generation mobile networks has become popular largely thanks to the ability of users to access the internet over devices like mobiles and tablets.
- The speed of data transmission on a 3G network ranges between 384 Kbps to 2 Mbps.
- This means a 3G network actually allows for more data transmission and therefore the network enables voice and video calling, File transmission, internet surfing, online TV, View high definition videos, play games and much more. 3G is the best option for users who need to always stay connected to internet.
- 4th Generation mobile networks are believed to provide many value added features. In addition to all the 3G facilities, data transmission is believed to go through the roof with speeds ranging between 100 Mbps to 1 Gbps. Happy talking, surfing, conferencing, chatting , networking, partying or whatever you want to do on your mobile phone.
Notes
