Застосування гібридної модуляції ЛЧМ–ФКМ в аналізі ЕКГ-сигналів

Abstract

The presented theses consider hybrid signal modulation methods that combine linear frequency modulation (LFM) and phase-coded modulation (PCM). It is shown that the combination of these approaches makes it possible to unite the high resolution characteristic of LFM signals with the noise immunity and signal concealment provided by PCM. A general mathematical expression of the hybrid LFM–PCM signal is presented and the principle of its formation is described. The main advantages and limitations of hybrid modulation methods are analyzed, including an increased signal-to-noise ratio, flexibility of parameter adjustment, and synchronization complexity. The application areas of such signals in radar, telecommunication, and biomedical systems are considered.