PMR-reduction for continuous time OFDM transmit signals by selected mapping

Author

Rettelbach, Jakob ; Huber, Johannes B.

Author_Institution

Inst. for Inf. Transm., Univ. Erlangen-Nurnberg, Erlangen, Germany

fYear

2012

fDate

3-5 Oct. 2012

Firstpage

1

Lastpage

5

Abstract

In order to cope with the problems of multipath propagation in communication systems, OFDM is currently the most popular choice amongst digital modulation schemes. The main drawback of OFDM is the high peak-to-average power ratio (PAPR), which PAPR necessitates a highly linear high power amplifier (HPA) in Class-A mode to avoid out-of-band radiation. This kind of amplifiers usually suffers from a bad power efficiency. A recent approach is to deploy different amplifier architectures with potentially higher power efficiencies, such as polar amplifiers. These kinds of amplifiers necessitate signals with low peak-to-minimum power ratio (PMR). In this paper, the PMR of the continuous time transmit signal is analyzed and reduced via Selected Mapping (SLM). To achieve this reduction in the domain of digital signal processing an approximation method for the PMR is derived.

Keywords

OFDM modulation; approximation theory; multipath channels; power amplifiers; PMR-reduction; approximation method; class-A mode; continuous time OFDM transmit signals; digital modulation; digital signal processing; highly linear high power amplifier; multipath propagation problems; peak-to-average power ratio; peak-to-minimum power ratio; polar amplifiers; selected mapping; Communication systems; Interpolation; Peak to average power ratio; Time domain analysis; Vectors;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals, Systems, and Electronics (ISSSE), 2012 International Symposium on

Conference_Location

Potsdam

ISSN

2161-0819

Print_ISBN

978-1-4673-4454-8

Electronic_ISBN

2161-0819

Type

conf

DOI

10.1109/ISSSE.2012.6374335

Filename

6374335