Add Friends (2/6) Essay

5040 words - 21 pages

ACKNOWLEDEMENT
We thank most of all God Almighty for his mercies and grace that kept us all through our seminar research and for giving us wisdom that was implemented in course of the research work.
We are greatly indebted to our supervisor, ENGR. JOHN CHUKWU for his love, courage, guidance and investment to the group, who sacrificed his time and schedule just to make sure that the best is been brought out from this group and also to the group leader who consistently made every effort and spent sleepless night ensuring that the seminar topic research was a worthwhile and fulfilling one, also to us been the group members who contributed to the success of the research topic.
We also want to ...view middle of the document...

TELECOMMUNICATION in the modern era is the science and practice of transmitting information by electromagnetic means.
MODULATION is the shaping of a signal to convey information or it can be said to be the super-imposition of high frequency into low frequency radiation.
DEMODULATION is the act of extracting the original information-bearing signal from a modulated carrier wave. A demodulator is an electronic circuit (or computer program in a software-defined radio) that is used to recover the information content from the modulated carrier wave.
TRANSMISSION(abbreviation: Tx) in telecommunication is the process of sending and propagating an analogue or digital information signal over a physical point-to-point or point-to-multipoint transmission medium, either wired, optical fiber or wireless. Transmission technologies and schemes typically refer to physical layer protocol duties such as modulation, demodulation, line coding, equalization, error control, bit synchronization and multiplexing, but the term may also involve higher-layer protocol duties, for example, digitizing an analog message signal, and source coding (compression).
TELEVISION (TV) is a telecommunication medium for transmitting and receiving moving images that can be monochrome (black-and-white) or colored, with or without accompanying sound.
DATA TRANSMISSION, digital transmission, or digital communications is the physical transfer of data (a digital bit stream) over a point-to-point or point-to-multipoint communication channel. Examples of such channels are copper wires, optical fibres, wireless communication channels, and storage media. The data are represented as an electromagnetic signal, such as an electrical voltage, radio wave, microwave, or infrared signal.
But for the sake of this topic, we shall talk extensively on digital transmission which is also data transmission.

BACKGROUND OF THE STUDY
Applications and History
In earlier times, telecommunications involved the use of visual signals, such as beacons, smoke signals, semaphore telegraphs, signal flags, and optical heliographs, or audio messages such as coded drumbeats, lung-blown horns, and loud whistles. In modern times, telecommunications involves the use of electrical devices such as the telegraph, telephone, and teleprinter, as well as the use of radio, microwave transmission towers, fiber optics, orbiting satellites and the Internet, which is a vast world-wide computer network.
A revolution in wireless telecommunications began in the first decade of the 1900s with pioneering developments in radio communications by Nikola Tesla and Guglielmo Marconi. Marconi won the Nobel Prize in Physics in 1909 for his efforts. Other highly notable pioneering inventors and developers in the field of electrical and electronic telecommunications include Charles Wheatstone and Samuel Morse (telegraph), Alexander Graham Bell (telephone), Edwin Armstrong, and Lee de Forest (radio), as well as John Logie Baird and Philo...

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