Time-efficient adjacent channel power ratio simulation utilizing Overlap-add signal decomposition for UMTS power amplifiers

Author

Zohny, Amr ; Leuschner, Stephan ; Kastner, Margit ; Rascher, Jochen ; Ussmueller, T. ; Mueller, Jessica ; Fischer, Georg ; Weigel, Robert

Author_Institution

Inst. of Electron. Eng., Friedrich-Alexander Univ., Erlangen, Germany

fYear

2012

fDate

4-7 Dec. 2012

Firstpage

493

Lastpage

495

Abstract

The suitability of an RF power amplifier (PA) for modern sophisticated modulation schemes demands high linearity. One of the most significant figures of merit concerning PA linearity is its adjacent channel power ratio (ACPR). The aim of this paper is to propose a time-efficient simulation procedure for ACPR which conforms with the latest 3GPP TS 25.101 specifications for its calculation. This procedure overcomes the time penalty associated with the traditional envelope-based simulation method. The approach is based on standard harmonic balance (HB) tools with MATLAB post-processing incorporating the Overlap-add (OLA) signal decomposition DSP technique for fast RRC filtering. In addition, the simulation results are compared with measurements of a commercial WCDMA PA for verification. Accuracies of better than 0.5dB and 1.1dB are achieved up to 10dB and 2dB backoff respectively.

Keywords

3G mobile communication; broadband networks; code division multiple access; modulation; power amplifiers; wireless channels; 3GPP TS 25.101 specification; ACPR; DSP technique; HB tool; MATLAB postprocessing; OLA signal decomposition; PA linearity; RF power amplifier; RRC filtering; UMTS power amplifier; WCDMA PA; envelope-based simulation method; figures of merit; harmonic balance tool; modulation scheme; overlap-add signal decomposition; time penalty; time-efficient adjacent channel power ratio simulation; time-efficient simulation; 3G mobile communication; Accuracy; Integrated circuit modeling; Multiaccess communication; Power generation; Solid modeling; Standards; Power amplifiers; adjacent channel power ratio (ACPR); distortion; harmonic balance (HB); linearity; wideband code-division multiple access (WCDMA);

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference Proceedings (APMC), 2012 Asia-Pacific

Conference_Location

Kaohsiung

Print_ISBN

978-1-4577-1330-9

Electronic_ISBN

978-1-4577-1331-6

Type

conf

DOI

10.1109/APMC.2012.6421641

Filename

6421641