Performance Analysis of MIMO-OFDM System Using SLM with Additive Mapping and U2 Phase Sequence for PAPR Reduction

  • Anuj SingalEmail author
  • Deepak Kedia


Selective mapping (SLM) is one of the core techniques to mitigate the problem of high PAPR in the MIMO-OFDM system. But the complexity of inverse fast Fourier transform (IFFT) increases with increase in the number of phase sequence in the conventional SLM (C-SLM) scheme. However, we can generate alternate signal sequences along with the OFDM sequence without increasing the number of IFFT. This can be achieved by combining in both SLM with additive mapping (SLM-AM) and U2 phase sequence (SLM-U2) respectively. The computational complexity of both (SLM-AM) and (SLM-U2) is comparatively lesser than the C-SLM without degradation the BER and PAPR performance. But these schemes require some extra memory to save the alternative sequences. In this paper we derive a new low computational complexity equation for combination of both (SLM-AM) and (SLM-U2) schemes using M-QAM and M-PSK modulation in MIMO-OFDM system. In the proposed MIMO-OFDM model, we also analyze the computational complexity and PAPR reduction performance of various schemes like C-SLM, SLM-U2, SLM-AM and SLM-AM-U2 respectively. It has been observed that proposed (SLM-AM-U2) provides best PAPR reduction performance. Also, the computational complexity is least in this case.


Multiple input and multiple output (MIMO) Orthogonal frequency division multiplexing (OFDM) Inverse fast Fourier transform (IFFT) Conventional selective mapping (C-SLM) Additive mapping (AM) Peak average power ratio (PAPR) 



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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Electronics and Communication EngineeringGJU S&THisarIndia

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