Peak-to-Average-Power-Ratio (PAPR) reduction in WiMAX and OFDM/A systems
Artikel i vetenskaplig tidskrift, 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.

sequential

WiMAX

OFDM

PAPR reduction

PTS

phase optimization

quadratic programing

Författare

Seyran Khademi

Chalmers, Signaler och system

T. Svantesson

Mats Viberg

Signaler och system, Signalbehandling och medicinsk teknik, Signalbehandling

Thomas Eriksson

Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

EURASIP Journal on Advances in Signal Processing

1687-6180 (ISSN)

Article Number: 38-

Ämneskategorier

Elektroteknik och elektronik

DOI

10.1186/1687-6180-2011-38