In SSB modulation system, if signal (cos 30t) is modulated with a carrier signal of frequency 850 rad /sec, then the expression for the lower side band isa)sin 850 tb)cos 820 tc)cos 880 td)andndash;sin 820 tCorrect answer is option 'B'. Can you explain this answer?

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In SSB modulation system, if signal (cos 30t) is modulated with a carrier signal of frequency 850 rad /sec, then the expression for the lower side band is

a)
sin 850 t
b)
cos 820 t
c)
cos 880 t
d)
–sin 820 t

Correct answer is option 'B'. Can you explain this answer?

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In SSB modulation system, if signal (cos 30t) is modulated with a carr...

m(t) = cos⁡ 30t

m(t) = cos⁡(30t − 90^∘) = sin⁡30t

For lower side band

s(t) = cos⁡30t cos ⁡850t + sin⁡ 30t sin ⁡850t

=cos⁡(850−30)t

= cos⁡ 820t

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In SSB modulation system, if signal (cos 30t) is modulated with a carrier signal of frequency 850 rad /sec, then the expression for the lower side band isa)sin 850 tb)cos 820 tc)cos 880 td)–sin 820 tCorrect answer is option 'B'. Can you explain this answer?

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