Design of a QPSK transceiver for use in satellite communication.

[摘要] ENGLISH ABSTRACT: Modern satellites have a wide range of transceivers and communication links,varying entirely with the overall function and mission of the satellite. Allsatellites however, no matter how small or trivial the mission, have some formof Telemetry, Tracking, and Command (TT&C) requirement. This communicationlink is critical for the success of the satellite mission, thus it's implementationis traditionally highly robust but slow. Under critical circumstanceshowever, having a high speed TT&C link could potentially shorten and simplifydata transfer times during relatively short over ight times of LEO satellites.It can also be the di erentiating factor between recovering from a unexpectedfault and losing all communication and thus losing the satellite.In an attempt to address this issue, this project analyzed the di culties experiencedwith a traditional TT&C link and used thesendings to implement ahigher speed TT&C link. To this end simulation software was designed to fullyunderstand the dynamic operation circumstances of LEO satellites. Two SBandQPSK transceivers were designed and built. The completed transceiverswere integrated with an accompanying project, and the overall system performancewas tested and evaluated.

[发布机构] Stellenbosch University