Peak power reduction for OFDM systems with orthogonal pilot sequences

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...

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Bibliographic Details
Published in:IEEE transactions on wireless communications 2006-01, Vol.5 (1), p.47-51
Main Authors: Fernandez-Getino Garcia, M.J., Edfors, O., Paez-Borrallo, J.M.
Format: Article
Language:English
Subjects:
Applied sciences
Channel estimation
Channels
Delay effects
Distortion
Electrical Engineering, Electronic Engineering, Information Engineering
Elektroteknik och elektronik
Engineering and Technology
Exact sciences and technology
Frequency division multiplexing
High power amplifiers
Modulation
Nonlinear distortion
OFDM
OFDM modulation
Orthogonal Frequency Division Multiplexing
Peak to average power ratio
peak-to-average power
Phase distortion
pilot symbols
Pilots
Probability density function
Proposals
Reduction
Switching and signalling
Symbols
Systems, networks and services of telecommunications
Teknik
Telecommunications
Telecommunications and information theory
Transmission and modulation (techniques and equipments)
Two dimensional
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Description
Summary: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.
ISSN:1536-1276
1558-2248
DOI:10.1109/TWC.2006.1576525