Title :
Discrete-time RF phase and pulse width modulation for power efficient switch-mode transmitter
Author :
Stanitzki, Alexander ; Scheytt, J. Christoph
Author_Institution :
advICo Microelectron. GmbH, Recklinghausen, Germany
Abstract :
Discrete-time RF pulse width modulation is mathematically analyzed. From the analysis a recipy for the generation of amplitude modulated RF signals by means of pulse-width modulation is derived. Furthermore a suitable fully digital polar phase and pulse width modulator architecture for switch-mode wireless transmitters is proposed. A system with 8 discrete pulse widths rsp. 16 phases at 2 GHz is modelled and simulated in Matlab/Simulink. It exhibits an SFDR of better than -67 dBc and EVM better than 1.8% with an 8 MSps 8-QAM test signal.
Keywords :
amplitude modulation; discrete time systems; pulse width modulation; radio transmitters; Matlab/Simulink; amplitude modulated RF signals; discrete-time RF phase width modulation; discrete-time RF pulse width modulation; frequency 2 GHz; fully digital polar phase; power efficient switch-mode transmitter; switch-mode wireless transmitters; Equations; Mathematical model; Phase modulation; Pulse width modulation; Radio frequency; Switches;
Conference_Titel :
Semiconductor Conference Dresden (SCD), 2011
Conference_Location :
Dresden
Print_ISBN :
978-1-4577-0431-4
DOI :
10.1109/SCD.2011.6068696
