Direct generation of digital modulation at microwave frequencies

Author

Kumar, Surinder

Author_Institution

Dept. of Electr. Eng., Saskatchewan Univ., Saskatoon, Sask., Canada

fYear

1988

Firstpage

169

Lastpage

171

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;

fLanguage

English

Publisher

ieee

Conference_Titel

WESCANEX 88: 'Digital Communications Conference Proceedings'

Conference_Location

Saskatoon, Sask.

Type

conf

DOI

10.1109/WESCAN.1988.27688

Filename

27688