A peak power reduction method with adaptive inversion of clustered parity-carriers in BCH-Coded OFDM systems

Osamu Muta, Yoshihiko Akaiwa

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In this paper, we propose a simple peak power reduction (PPR) method based on adaptive inversion of parity-check block of codeword in BCH-coded OFDM system. In the proposed method, the entire parity-check block of the codeword is adaptively inversed by multiplying weighting factors (WFs) so as to minimize PAPR of the OFDM signal, symbol-by-symbol. At the receiver, these WFs are estimated based on the property of BCH decoding. When the primitive BCH code with single error correction such as (31,26) code is used, to estimate the WFs, the proposed method employs a significant bit protection method which assigns a significant bit to the best subcarrier selected among all possible subcarriers. With computer simulation, when (31,26), (31,21 ) and (32,21 ) BCH codes are employed, PAPR of the OFDM signal at the CCDF (Complementary Cumulative Distribution Function) of 10-4 is reduced by about 1.9, 2.5 and 2.5 dB by applying the PPR method, while achieving the BER performance comparable to the case with the perfect WF estimation in exponentially decaying 12-path Rayleigh fading condition

Original languageEnglish
Pages (from-to)1454-1462
Number of pages9
JournalIEICE Transactions on Communications
VolumeE91-B
Issue number5
DOIs
Publication statusPublished - 2008

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Computer Networks and Communications
  • Software

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