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An audio signal of amplitude one half th...

An audio signal of amplitude one half the carrier amplitude is used in an amplitude modulation. The modulation index is

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Here`E_(m)=0.5E_(c) therefore E_(max)=E_(c)+E_(m) =E_(c)+0.5E_(c)=1.5E_(c)`, `E_(min)=E_(c)-E_(m)=E_(c)-0.5E_(c)=0.5E_(c)` `m_(a)=(E_(max)-E_(min))/(E_(max)+E_(min))`=`(E_(c))/(2.0E_(c))=0.5`
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