Title :
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
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);
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
DOI :
10.1109/APMC.2012.6421641
