Digital modulation techniques Submitted By - KM Sakshi Verma Roll no.-1705918 Section-CS12
In this presentation, we will study about • What modulation is ? • Categories of modulation (Analog and Digital) • Types of Modulation (Analog and Digital)
1. Modulation • Modulation is a process of suppressing low frequency information signal on a high frequency carrier signal. OR Modulation is a process of modifying the any of the characteristics (amplitude, frequency, phase) of high frequency carrier in accordance with low frequency information signal.
Remember, for modulation require two signals, high frequency carrier and low frequency • information signal (also called modulation signal). • The resultant wave achieved known as “modulated signal”. i.e. information (modulating signal) + carrier = modulated signal. • Why there is need of modulation? • Is there any substitute of modulation?