Peak power reduction for OFDM systems with orthogonal pilot sequences

Research output: Contribution to journalArticle


In this paper, a novel peak-to-average power reduction approach for orthogonal frequency division multiplexing (OFDM) has been addressed. Two-dimensional pilot-symbol assisted modulation (2D-PSAM) is employed in coherent OFDM for channel estimation, and it is based on inserting known symbols spread throughout the 2D time-frequency grid. These pilot symbols are employed to simultaneously perform distortionless peak power reduction with a suboptimum technique named orthogonal pilot sequences (OPS), which reduces additional system complexity and side information compared to optimum pilot values. This proposal attains a further step over other previous works, since this set of sequences allows blind detection at the receiver without prior knowledge of any side information.


Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Electrical Engineering, Electronic Engineering, Information Engineering


  • peak-to-average power, OFDM, pilot symbols
Original languageEnglish
Pages (from-to)47-51
JournalIEEE Transactions on Wireless Communications
Issue number1
Publication statusPublished - 2006
Publication categoryResearch