Peak power reduction for OFDM systems with orthogonal pilot sequences

Research output: Contribution to journalArticle

Abstract

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.

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Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Electrical Engineering, Electronic Engineering, Information Engineering

Keywords

  • peak-to-average power, OFDM, pilot symbols
Original languageEnglish
Pages (from-to)47-51
JournalIEEE Transactions on Wireless Communications
Volume5
Issue number1
Publication statusPublished - 2006
Publication categoryResearch
Peer-reviewedYes