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Improvement of PAPR in OFDM Systems Using SLM Technique and Digital Modulation Schemes

Conference paper
Part of the Advances in Intelligent Systems and Computing book series (AISC, volume 243)

Abstract

Orthogonal frequency division multiplexing (OFDM) is an attractive transmission technique for high data rate and reliable communications over multipath fading channels. One of the main drawbacks in OFDM is increase in peak-to-average power ratio (PAPR) of the signal, which causes degradation of bit error rate (BER) performance, nonlinear distortion effects, and need of high-power amplifiers. To reduce PAPR, there are several distortion- and distortionless-based schemes. In this paper, distortionless-based scheme, selective level mapping (SLM), is considered for the reduction of PAPR as it gives significant improvement in PAPR. For encoding, turbo codes are used as they are a class of high-performance forward error correction (FEC) codes. This paper consists of comparison of PAPR improvement for various digital modulation techniques.

Keywords

OFDM PAPR SLM Turbo codes CCDF Digital modulation schemes 

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Copyright information

© Springer India 2014

Authors and Affiliations

  • Srinu Pyla
    • 1
  • K. Padma Raju
    • 2
  • N. BalaSubrahmanyam
    • 1
  1. 1.Department of Electronics and Communication EngineeringGVP College of EngineeringVisakhapatnamIndia
  2. 2.Department of Electronics and Communication EngineeringJNTU UniversityKakinadaIndia

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