Evaluation of quadrature PWM modulator performance for digital wideband transmitters

Author

Ruotsalainen, Henri A. ; Arthaber, Holger

Author_Institution

Inst. of Electrodynamics, Vienna Univ. of Technol., Vienna, Austria

fYear

2012

fDate

Oct. 29 2012-Nov. 1 2012

Firstpage

1308

Lastpage

1311

Abstract

In this paper the performance of a digital quadrature PWM modulator for switched-mode wideband transmitters is evaluated. The purpose of the evaluation is to analyze the impact of the modulator parameter settings on the signal band quantization noise and on the average power efficiency of the complete digital transmitter. Considering a realistic setup at GHz range, the performance conditions for an accurate operation are studied as well. According to the results a higher average transmitter efficiency can be expected for a 10 MHz LTE signal excitation when compared with a similar modulator structure utilizing ΣΔ modulation.

Keywords

modulators; pulse width modulation; radio transmitters; ΣΔ modulation; LTE signal excitation; average power efficiency; digital quadrature PWM modulator performance evaluation; digital wideband transmitters; frequency 10 MHz; modulator structure; signal band quantization noise; switched-mode wideband transmitters; Bandwidth; Encoding; Noise; Pulse width modulation; Quantization; Signal resolution; 4G mobile communication; PWM; radio frequency power amplifiers; sigma delta modulation; software radio;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference (EuMC), 2012 42nd European

Conference_Location

Amsterdam

Print_ISBN

978-1-4673-2215-7

Electronic_ISBN

978-2-87487-026-2

Type

conf

Filename

6459279