2020/04/07 by Steven W. Ellingson, Ellingson, S. W. · 1 citation
Engineering · #Advanced Electrical Measurement Techniques #FOS: Electrical engineering #GNSS positioning and interference #Geophysical Methods and Applications #Signal Processing (eess.SP) #electronic engineering #information engineering
paper · pdf · doi:10.48550/arxiv.2004.03649
openalex publication_date 2020/04/07 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Most radio signals can be described as a form of sinusoidal carrier modulation. These signals have the property that when observed over a sufficiently short period of time, the waveform is approximately sinusoidal, exhibiting constant magnitude, frequency, and phase. When coherently digitized with sufficiently high sample rate, it is possible to discern this sinusoid. The associated signal can be represented as a sinusoid with time-varying frequency, magnitude, and phase. These parameters can subsequently be used for detection and characterization, including identification. The parameters can also be used to synthesize a noise-free estimate of the signal. The synthesized signal can be coherently subtracted from the original data in order to cancel the signal, nominally without distortion of the associated noise or nearby signals. In this report, the conditions required for the short-time sinusoidal approximation are described. Performance of the canceling technique is examined in the case of a VHF-band narrowband FM-modulated signal.