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PAPR Performance Analysis of Unitary Transforms in SLM-OFDM for WLAN 802.11a Mobile Terminals

  • Sukanya Kulkarni
  • B. K. Mishra
Conference paper
Part of the Lecture Notes in Networks and Systems book series (LNNS, volume 5)

Abstract

A high Peak to average power is a major disadvantage in Orthogonal frequency division multiplexing (OFDM) systems since it leads to presence of severe non-linearity in the final power amplifier stage thereby reducing the power efficiency of the transmitter. Precoded Selective level mapping (SLM) OFDM using high merit factor or low aperiodic autocorrelation based phase sequence set is proposed for PAPR reduction while ensuring satisfactory modulation accuracy in WLAN mobile terminals. Further, a novel unitary transform kernel based precoding method is applied as preprocessing stage to SLM and the performance is analyzed for a 64 sub-carrier OFDM system. Simulation results show that proposed discrete cosine transform (DCT) precoded SLM achieves a PAPR of 7.3 dB at 10−3 clipping probability and error vector magnitude of 8.9%.

Keywords

Unitary transform Selective level mapping (SLM) Precoding Discrete cosine transform (DCT) Peak to average power ratio (PAPR) 

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Copyright information

© Springer Nature Singapore Pte Ltd. 2017

Authors and Affiliations

  1. 1.Sardar Patel Institute of Technology, Mumbai UniversityMumbaiIndia
  2. 2.Thakur College of Engineering and Technology, Mumbai UniversityMumbaiIndia

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