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The S2 VLBI Correlator: A Correlator for Space VLBI and Geodetic Signal Processing
Publications of the Astronomical Society of the Pacific
We describe the design of a correlator system for ground and space-based VLBI. The correlator contains unique signal processing functions: flexible LO frequency switching for bandwidth synthesis; 1 ms dump intervals, multi-rate digital signal-processing techniques to allow correlation of signals at different sample rates; and a digital filter for very high resolution cross-power spectra. It also includes autocorrelation, tone extraction, pulsar gating, signal-statistics accumulation.doi:10.1086/316415 fatcat:redaem4uazc5hkgfozffzr2b2i