Variable bandwidth DPLL bit synchronizer with rapid acquisition implemented as a finite state machine. - Helmuth Brügel; Peter F. Driessen (IEEE Trans. Commun., 1994)

Maximum likelihood real part of coherence between two noisy sensor outputs with zero-delay signal inputs. - Rodney Lynn Kirlin; Helmuth Brügel; Cui Ying; Dale Groutage (IEEE Trans. Signal Process., 1994)