Hough-transform-based FPGA track processor for the ATLAS experiment at CERN

<!--HTML-->The Hough-transform-based FPGA track processing is considered for the trigger system of the ATLAS detector at the Large Hadron Collider at CERN as a part of the upgrade for the High-Luminosity program. The prototype firmware has been developed to evaluate system size. The track processing is organized as a pipeline to increase data processing and clock rates. This Hough transform accumulator can use input pixel and strip hits, stubs, and space-points. It outputs track candidates for bins that meet the track reconstruction requirements. The accumulator is configurable with number of bins in φ and q/pT, and number of input hits.