Title :
Direct generation of digital modulation at microwave frequencies
Author_Institution :
Dept. of Electr. Eng., Saskatchewan Univ., Saskatoon, Sask., Canada
Abstract :
Direct generation of digital modulation at microwave frequencies ( L, C, Ku, and Ka bands) is attractive for digital microwave communication systems. The author previously (1981) proposed the use of minimum-shift keying (MSK) for a directly modulated microwave transmitter. However, while an MSK signal can be generated simply by frequency-shift keying a high-power oscillator with prefiltered data, the modulator will be of practical use only if some feedback circuits are incorporated to control the modulation index and the nominal carrier frequency. The author presents circuits to implement such controls
Keywords :
digital communication systems; microwave links; modulation; C band; Ka band; Ku band; L band; SHF; UHF; digital microwave communication systems; digital modulation; direct generation; feedback circuits; microwave frequencies; modulation index; modulator; nominal carrier frequency; prefiltered data; Digital modulation; Feedback circuits; Frequency shift keying; High power microwave generation; Microwave communication; Microwave frequencies; Microwave generation; Microwave oscillators; Signal generators; Transmitters;
Conference_Titel :
WESCANEX 88: 'Digital Communications Conference Proceedings'
Conference_Location :
Saskatoon, Sask.
DOI :
10.1109/WESCAN.1988.27688
