Title :
Phase modulated DGPS transmitter implemented with a clamped-mode resonant converter
Author :
González, Sergio A. ; Valla, María Inés ; Muravchik, Carlos H.
Author_Institution :
La Plata Nat. Univ., Argentina
fDate :
7/1/2004 12:00:00 AM
Abstract :
A clamped-mode resonant converter (CMRC) is proposed to be used as a transmitter which broadcasts correction signals in a differential Global Positioning System (DGPS). The digital information of the DGPS modulates the carrier with different modulation methods minimum shift keying (MSK) (recommended for the marine radiobeacon band), stepped binary phase shift keying (S-BPSK) and BPSK. The first two methods allow keeping the converter´s operation in soft switching mode. Extensive trials under impedance mismatch and modulation conditions confirm that the soft switching mode is preserved.
Keywords :
Global Positioning System; convertors; minimum shift keying; phase modulation; power amplifiers; radio transmitters; BPSK; DGPS transmitter; S-BPSK; broadcasts correction signals; clamped-mode resonant converter; converter operation; digital information; global positioning system; impedance mismatch; marine radiobeacon band; minimum shift keying; modulation conditions; modulation methods; phase modulation; soft switching mode; stepped binary phase shift keying; Binary phase shift keying; Digital modulation; Global Positioning System; Phase modulation; Power harmonic filters; Radio broadcasting; Radio transmitters; Radiofrequency amplifiers; Resonance; Voltage;
Journal_Title :
Aerospace and Electronic Systems, IEEE Transactions on
DOI :
10.1109/TAES.2004.1337464
