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The model of the MCCDMA system using selective mapping (SLM) is analyzed and the upper bound of the peakaverage power ratio (PAPR) in the system is derived. For the PAPR distribution and the connection between the PAPR and the number of users in the MCCDMA system using SLM, the simulations are given based on several phase sequences in SLM.The simulation results show that when random sequences, ShapiroRudin sequences or Golay complementary sequences are selected as the phase sequences in SLM, SLM has obvious effect on the PAPR reduction in MCCDMA system and the system PAPR nearly maintains constant as the number of users varies. The maximal PAPR in the MCCDMA system using SLM(10 users)is about 6.3 which is 3.3 less than that in the common MCCDMA system (without SLM).
The model of the MCCDMA system using selective mapping (SLM) is analyzed and the upper bound of the peakaverage power ratio (PAPR) in the system is derived. For the PAPR distribution and the connection between the PAPR and the number of users in the MCCDMA system using SLM, the simulations are show on when random sequences, ShamiroRudin sequences or Golay complementary sequences are selected as the phase sequences in SLM, SLM has obvious effect on the PAPR reduction in MCCDMA system and the system PAPR nearly keeps constant the number of users varies. The maximal PAPR in the MCCDMA system using SLM (10 users) is about 6.3 which is 3.3 less than that in the common MCCDMA system (without SLM).