Modulation

Digital modulation:- digital modulation : The process of varying one or more parameters of a carrier wave as a function of two or more finite and discrete states of a signal. Digital modulation types :- Digital Modulation provides more information capacity, high data security, quicker system availability with great quality communication. Hence, digital modulation techniques have a greater demand, for their capacity to convey larger amounts of data than analog ones. There are many types of digital modulation techniques and we can even use a combination of these techniques as well. In this chapter, we will be discussing the most prominent digital modulation techniques. Amplitude Shift Keying The amplitude of the resultant output depends upon the input data whether it should be a zero level or a variation of positive and negative, depending upon the carrier frequency. Amplitude Shift Keying (ASK)  is a type of Amplitude Modulation which represents the binary data in the form of variations