Title :
Linear modulators based on RF synthesis: realization and analysis
Author :
Chan, Kam-yuen ; Bateman, Andrew
Author_Institution :
Centre for Commun. Res., Bristol Univ., UK
fDate :
6/1/1995 12:00:00 AM
Abstract :
A technique for generating a gain and phase modulated high power radio signal is described using RF synthesis. The realization, which uses a unique twin VCO design, can give a theoretical near 100% amplifier efficiency with excellent linearity. A number of architectures are presented supported by both analytical and simulation results. Laboratory tests have verified the predicted performance for π/4 QPSK modulation
Keywords :
frequency synthesizers; linear network analysis; modulators; phase modulation; quadrature phase shift keying; voltage-controlled oscillators; π/4 QPSK modulation; RF synthesis; gain modulated radio signal; high power radio signal; linear modulators; phase modulated radio signal; twin VCO design; Analytical models; Linearity; Phase modulation; Power generation; RF signals; Radio frequency; Radiofrequency amplifiers; Signal generators; Signal synthesis; Voltage-controlled oscillators;
Journal_Title :
Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on
