An FPGA-based frequency counter using a Hilbert transform and weighted linear regression achieves real-time frequency readout of free-induction-decay signals with sensitivity comparable to offline nonlinear fitting.
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A high-sensitivity frequency counter for free-induction-decay signals
An FPGA-based frequency counter using a Hilbert transform and weighted linear regression achieves real-time frequency readout of free-induction-decay signals with sensitivity comparable to offline nonlinear fitting.