ABOUT CELLULAR (cellular shop, cellular world, cellular world bali, cellular news, cellular movie, cellular automata, cellular one,cellular phone, celluar city, cellular shopn jakarta)

Definition
The communication system used to provide telecommunications services for customers moving.Called a cellular system because of its service area is divided into small areas called CELL.NATURE: The customer is able to move freely within the service area while communicating without termination.

MOBILE COMMUNICATION SYSTEM (Lecture, Tower, engineering, society, unit)

Requirement of Mobile communication system

• There is at least one mobile terminal in communication 

The beginnings

• High emittance
• Antenna as high as
• Maximum cell coverage 
• Handoff concept does not exist

MODULATION

At the transmitter, there are several components necessary to be able to transmit information, one of which is a modulator, the modulator is a tool to perform modulation.  Interpreted as a mixing signal modulation and signal information carier, but a little confusing here is why should the mix? and why is mixed with another signal called signal carier? well then what's carier signal? some of these things we will discuss in this article.

Why the signal must be mixed with carier signal?

• which is to be expected from transmitting transmitting range can be as far - away, to be able to emit such a shift, we perform frequency, with frequencies shift to the higher frequency range of the signal is also farther away in accordance with the equation λ =, λ = wavelength.
• rest result from this frequency shift was also influenced by the size of transmitting antenna, satellite dish, antenna diameter will correspond to the wavelength, the diameter parabolic antenna will be in accordance with the equation λ = ¼ d, d = diameter of antenna
•   Viewed advantage of this modulation can also be the basis of the MUX (multiplexing), multiplexing is the process of combining several channels to save the channel.
• Modulation is also needed if we want a data transfer by radiation, because one of the requirements can be transmitted is first in the modulation signal terlebihh
• With the modulation process, as well as reduce the influence of the noise that arises, is the interference noise arising from several causes, for the noise will also be discussed further in the next article 

Why should signal carier?
Carier signal can be likened such as trucks and likened to such information goods transported by truck, carier signal will carry the signal information, more precise information signal superimposed on carier signal, because that's signal required carier.
Actually whether it carier signal?
Carier signal is a signal that has a certain frequency, with greater provision of information signal, why should larger, same as above, a truck must be greater than he brought the items to be, if it already can you imagine, that need to be considered is carier signal not the signal information
There are two types of modulation, namely:

• Analog modulation
• Digital modulation

Analog modulation

• PCM
• DPCM
• ADPCM
• Delta Modulation

Digital modulation

• ASK (Amplitude Shift Keying)
• PSK (Phase Keying SIFT)
• QPSK (Quadrate Phase Keying SIFT)
• FSK (Frequency Shift Keying)

  EXPLANATION OF THE FORM OF MODULATION will be explained BACK IN THE NEXT CHAPTER

TELECOMMUNICATIONS BASIC PRINCIPLES

 

  Basic knowledge of telecommunications is how that information can be sent and received by both

Basic science is what makes the science of telecommunications, In this modern era have had the information exchange process is very important and can not be separated from each individual, with on behalf of the rights of every human being to obtain information on the exchange of information into one new primary requirement for human, Though separated by distance, with knowledge of telecommunications we can still make the process of exchanging information so that the distance at the present time has not become obstacles in information exchange.


Along with the development of this science, has also developed various communication devices that support, like cell phone (cellular) communications tool has become a primary requirement , almost everyone around the world have this tool, another example is a one-way communication media Television, Television is one of the most effective form of communication and influence the world, then enter a more modern era have internet again, a glimpse of the Internet, the Internet is a collection of networks from around the world are focused on the server, through this internet multimedia information can spread rapidly throughout the world in a matter of time seconds

BTS Simple Plan

Analysis 

• Both base stations in a state analogous to the parallel (in fact the earth's surface is not flat) 
• The process of transmitting signals to the BTS is elliptical, which will occur in the region mark the middle (Fresnel zone) and will be pursed at the end point 
• The process is influenced by the high transceiver base stations, the distance between base stations, the distance to the obstacle, and noise 
• Although perambatannya in the air, but there is loss - loss of free space (FSLdB) loss - this loss is affecting the quality of the signal 
• In order to measure the accuracy of the position of base stations needed to track and note the pattern of barriers that exist between the BTS, there are several formulas for estimating the height of the tower base stations in accordance with the constraints 
• BTS Antenna has a working frequency of 2.4 GHz and is now growing again 
• Great value will affect the frequency of the physical size of a transmitter 
• The quality of transmitting also influenced by the frequency in accordance with the following equation 

           Q = fo / B
Q    = Quality
Fo   = frequency
B    =  Bandwith

Making simple tribble and bass

If the capacitors are arranged in series with the speakers, the capacitor will act as HPF (High Pass Filter) means to pass the high frequencies, which issued a voice vote with a higher tone.

USE FILTER TO MAKE BASS AND TRIBBLE

There are four types of filter LPF, FSH, BPF and Band Stop Filter  each have their different function
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