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What is the need for modulation?
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Answer Posted / sravanthi mavudi
actually sevaral problems are arived in the propagation of
em waves at AF band(20-20khz)when signal i transmitted with
out modulation.modulation is extreemly necessary in
communication syatems due to following problems.
1.practical length of antenna
2.to reduce noise&interference
3.for frequency assignment
4.for multiplexing
5.to overcome circuit limitations
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