Effective demodulation of amplitude and phase is a requirement in wide array applications. Recent efforts have increased the performance, particular, Lyapunov demodulator allows bandwidths up to carrier frequency signal. However, being inherently restricted first-order filtering input signal, it highly sensitive components outside its passband region. This makes unsuitable for certain applicati...

Abstract Computation of the instantaneous phase and amplitude via Hilbert Transform is a powerful tool data analysis. This approach finds many applications in various science engineering branches but not proper for causal estimation because it requires knowledge signal’s past future. However, several problems require real-time amplitude; an illustrative example phase-locked or amplitude-depende...

Quantitative analysis of electromyographic (EMG) data still demands new methods. One of the methods is based on counting occurrences of signal crossings of "noise level" (per time unit). This provides an estimator of the so called "aggregate activity." These data can be obtained by a spike trigger connected to a computer. Comparison of total activity of firing motor units in intact and affected...