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1	Real-time Adaptive Cancellation of Satellite Interference in Radio Astronomy Poulsen, Andrew Joseph 17 July 2003 (has links) (PDF) Radio astronomy is the science of observing the heavens at radio frequencies, from a few kHz to approximately 300 GHz. In recent years, radio astronomy has faced a growing interference problem as radio frequency (RF) bandwidth has become an increasingly scarce commodity. A programmable real-time DSP least-mean-square interference canceller was developed and demonstrated as a successful method of excising satellite down-link signals from both an experimental platform at BYU, and the Green Bank Telescope at the National Radio Astronomy Observatory in West Virginia. A performance analysis of this cancellation system in the radio astronomy radio frequency interference (RFI) mitigation regime constitutes the main contribution of this thesis. The real-time BYU test platform consists of small radio telescopes, low noise RF receivers, and a state-of-the-art DSP platform. This programmable real-time radio astronomy RFI mitigation tool is the first of its kind. Basic tools needed for radio astronomy observations and the analysis and implementation of interference mitigation algorithms were also implemented in the DSP platform, including a power spectral density estimator, a beamformer, and an array signal correlator. real-time radio astronomy interference DSP least-mean-square LMS satellite Green Bank Telescope GBT NRAO National Radio Astronomy Observatory RFI radio frequency interference telescope RF radio frequency mitigation power spectral density PSD beamformer correlator Very Small Array VSA antenna software OH sources hydroxyl algorithm spectral analysis GLONASS red-shifted Green Bank Electrical and Computer Engineering

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Real-time Adaptive Cancellation of Satellite Interference in Radio Astronomy