The PAPR is the relation between the maximumpower of a sample in a given OFDM transmitsymbol divided by the average power of thatOFDM symbol. PAPR occurs when in a multicarriersystem the different sub-carriers are out ofphase with each other. At each instant they aredifferent with respect to each other at differentphase values. When all the points achieve themaximum value simultaneously; this will cause theoutput envelope to suddenly shoot up which causesa 'peak' in the output envelope
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