PAPR ANALYSIS OF CLASS-III SLM SCHEME BASED ON VARIANCE OF CORRELATION OF ALTERNATIVE OFDM SIGNAL SEQUENCES

PAPR:
                    Selected mapping (SLM) is a well-known peak-to average power ratio (PAPR) reduction technique for orthogonal frequency division multiplexing (OFDM) systems. Recently, a low-complexity SLM scheme, called Class-III SLM scheme, was proposed, which performs only one inverse fast Fourier transform (IFFT) to generate alternative OFDM signal sequences

                                                   
                                                            Fig:OFDM
      
                      When OFDM signals with high PAPR pass through nonlinear high power amplifier, they experience in-band distortion and out-of-band radiation. Thus, in order to reduce PAPR, many schemes have been proposed such as selected mapping (SLM) partial transmit sequence and tone. Reservation.Finally, three low-complexity SLM schemes using conversion vectors were proposed  Among them, it is known that the one using Class-III conversion vector (which we will refer to as Class-III SLM scheme) shows better PAPR reduction performance than Class-I and Class-II SLM schemes

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PAPR ANALYSIS OF CLASS-III SLM SCHEME BASED ON VARIANCE OF  CORRELATION OF ALTERNATIVE OFDM SIGNAL SEQUENCES