Peak power reduction scheme base on transform kernel scrambling for OFDM systems

  • Authors:

  • Chau-Yun Hsu;Hsin-Chieh Chao

  • Affiliations:

  • Graduate Institute of Communication Engineering, Tatung University, Taipei, Taiwan R.O.C 104 and Graduate Institute of Communication Engineering, Tatung University, Taipei, Taiwan R.O.C 104;Graduate Institute of Communication Engineering, Tatung University, Taipei, Taiwan R.O.C 104

  • Venue:
  • Wireless Personal Communications: An International Journal
  • Year:
  • 2007

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Abstract

This work presents a novel transform kernel scrambling (TKS) scheme for reducing the peak-to-average transmitter power ratio (PAPR) for Orthogonal Frequency Division Multiplexing (OFDM) symbols. This scrambling scheme suppresses the peak envelope power of OFDM signals due to de-correlation among the original QAM constellation in multiple OFDM symbols via transformation. The performance of the reduction of PAPR for OFDM signals with various unitary transform kernels is also evaluated. Since specific unitary transform kernels in TKS processing block is only used for scrambling, no side information is required. For the ease of presentation, the system performance has been demonstrated by a computer simulation. Simulation results confirm the superiority of the proposed scheme in the PAPR reduction.