21-09-2016, 11:41 AM
1455540949-stratellites140327063448phpapp01.pptx (Size: 895.08 KB / Downloads: 5)
Wireless communication is simply data communication without the use of landlines.
This may involve cellular telephone, radio etc.
Since from the beginning of wireless communications, there have been a number of developments in each generation. Considering the future generation of wireless communication i.e.; 4G.
4th GENERATION
To achieve the goals of true broadband cellular service, the systems have to make the leap to a fourth-generation (4G) network.
Most probable the 4G network would be a network which is a combination of different technologies (current cellular networks, 3G cellular network, wireless LAN, etc.)
4G is intended to provide high speed , high capacity and low cost
A “STRATELLITE”(25 times larger than good year blimp) is high altitude airship employed like a satellite for remote sensing, communication.
STRATELLITES are positioned in stratosphere approximately 13 miles above the earth.
CONSTRUCTION:
Outer layer is made of spectra which is the fabric used in bullet proof vests.
Filled with a mixture of helium and air
Consists of:
Propeller
Solar cells
Regenerative fuel cells
Helium gas bag
Transponder
Hybrid electric motors
WORKING:
Inside layer is filled with helium gas it is an inert gas and is therefore not flammable
With this design, the helium expands as the airship rises forcing air out by propellers and lifting the airship.
Uses solar cells sprayed on their surface to generate electricity.
The generated electricity drives propellers that work with GPS technology to keep the stratellite stationary.