14 Determine the relationship between modulation index and dissipated power in transmission of an amplitude modulated wave - Physics - Communication Systems

Question

14 Determine the relationship between modulation index and
dissipated power in transmission of an amplitude modulated wave

Sandeep K. Gupta · Accepted Answer

Dear Student,

The power dissipated in any circuit is a function of the square of voltage 'V' (rms value) across the circuit and the effective  resistance'R'  of  the  circuit
Equation of AM wave reveals that it has three components ofamplitude AC and for side bandsμVC2,μVC2(for lower and upper side bands)Clearly, power output must be distributed among these componentsPC=VC/22R=VC22RFor side bands , PS=μVC/222R+μVC/222R=μ2VC24RNet  power for transmitted wave PT=PC+PS=VC22R+μ2VC24R=VC22R1+μ22   ⇒ PT=PC1+μ22 
Regards

14. Determine the relationship between modulation index and dissipated power in transmission of an amplitude modulated wave.