Title :
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
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 :
Long Term Evolution; pulse width modulation; quantisation (signal); radio transmitters; sigma-delta modulation; ΣΔ modulation; LTE signal excitation; average power efficiency; digital quadrature PWM modulator performance; digital wideband transmitters; frequency 10 MHz; modulator parameter settings; modulator structure; signal band quantization noise; switched-mode wideband transmitters; transmitter efficiency; Bandwidth; Encoding; Noise; Pulse width modulation; Quantization (signal); Signal resolution; 4G mobile communication; PWM; radio frequency power amplifiers; sigma delta modulation; software radio;
Conference_Titel :
Microwave Integrated Circuits Conference (EuMIC), 2012 7th European
Conference_Location :
Amsterdam
Print_ISBN :
978-1-4673-2302-4
Electronic_ISBN :
978-2-87487-026-2
