by admin | Jun 7, 2015 | sem3
THEORY OF FREQUENCY AND PHASE MODULATION: Frequency modulation: The process of changing the frequency of the carrier signal in accordance with the modulating signal transmitted, keeping the amplitude and phase of the carrier wave unchanged is known as frequency...
by admin | Jun 7, 2015 | sem3
Evolution and Description of SSB techniques Single side band suppressed carrier: (SSB-SC) In SSB-SC any one of the unwanted side band is suppressed along with the carrier signal. Since DSB-FC consumes more power as both the side bands are transmitted and the same...
by admin | Jun 7, 2015 | sem3
Amplitude Modulation Theory The process of changing the amplitude of the carrier signal in accordance with the modulating signal transmitted, keeping the frequency and phase of the carrier wave unchanged is known as amplitude modulation. Representation of AM wave: The...
by admin | Jun 7, 2015 | sem3
Needs for Modulation NEED FOR MODULATION 1) TO REDUCE THE ANTENNA HEIGHT 2) TO MULTIPLEX THE MORE NUMBER OF SIGNALS 3) TO REDUCE THE NOISE & DISTORTIONS 4) TO NARROW BANDING THE SIGNAL 5) TO REDUCE EQUIPMENT COMPLEXITY In simple terms, modulation is required to...
by admin | Jun 7, 2015 | sem3
TYPES OF MODULATION Based on the characteristics of the carrier signal, modulation can be classified as below: Amplitude Modulation. Frequency Modulation. Phase Modulation. THEORY OF AMPLITUDE MODULATION: The process of changing the amplitude of the carrier signal in...
by admin | Jun 7, 2015 | sem3
Modulation Modulation is the addition of information (or the signal) to an electronic or optical signal carrier. Modulation can be applied to direct current (mainly by turning it on and off), to alternating current, and to optical signals. One can think of blanket...
