Peak-to-Average-Power-Ratio (PAPR) reduction in WiMAX and OFDM/A systems
Journal article, 2011

A peak to average power ratio (PAPR) reduction method is proposed that exploits the precoding or beamforming mode in WiMAX. The method is applicable to any OFDM/A systems that implements beamforming using dedicated pilots which use the same beamforming antenna weights for both pilots and data. Beamforming performance depends on the relative phase shift between antennas, but is unaffected by a phase shift common to all antennas. PAPR, on the other hand, changes with a common phase shift and this paper exploits that property. An effective optimization technique based on sequential quadratic programming is proposed to compute the common phase shift. The proposed technique has several advantages compared with traditional PAPR reduction techniques in that it does not require any side-information and has no effect on power and bit-error-rate while providing better PAPR reduction performance than most other methods.




PAPR reduction


phase optimization

quadratic programing


Seyran Khademi

Chalmers, Signals and Systems

T. Svantesson

Mats Viberg

Chalmers, Signals and Systems, Signalbehandling och medicinsk teknik, Signal Processing

Thomas Eriksson

Chalmers, Signals and Systems, Communication and Antenna Systems, Communication Systems

EURASIP Journal on Advances in Signal Processing

1687-6180 (ISSN)

Article Number: 38-

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering



More information