Modulation Techniques
What are the applications of modulation techniques in telecommunications?
Telecommunications modulating is a necessary process for an information bearing signal (as a waveform) to pass precisely through a transmission source. It is assigning a suitable wave using these procedures. The way it works is select characteristics of the carrier wave is varied in compliance with the signal (i.e. The modulating wave). It is then, transmitted through a channel with the original signal recovered in a process known as demodulation. This provides the receiver with all of the data and information, as it was intended from the sender. (Wright, 2004) (Horak, 2007)
There are multiple techniques which are used during the process. The most notable include: amplitude shift keying, binary phase shift keying and multiple phase shift keying. According to Wright (2004) and Horak (2007), each one of these is used to transmit the signal and provide the receiving party with the information in a specific format. (Wright, 2004) (Horak, 2007)
Amplitude shifting is when; the sine radio wave is being adjusted and boosted. This occurs using a number of techniques on the AM or FM band to include: modifying the amplitude, phrase or frequency. These procedures are utilizing the mark and space to improve the quality. They are produced through a function of changing the harmonics and the modulating index. (Wright, 2004) (Horak, 2007)
In the case of AM, sidebands are produced which go below or above the carrier. It is equal to the highest frequency content of the modulating signal. The bandwidth requires two times the strength of the larger frequency content from the modulating signal. This includes any harmonics and binary pulse modulating signals. (Wright, 2004) (Horak, 2007)
The FM signal is produced on multiple side band frequencies. They can be produced above or below them on the...
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