A Technique to Compute Smooth Amplitude, Phase, and Frequency Modulations From the Analytic Signal

Venkitaraman, ArunDepartment of Electrical Engineering, Indian Institute of Science, Bangalore-560012, India (författare)

QC 20131211
Gabor’s analytic signal (AS) is a unique complexsignal corresponding to a real signal, but in general, it admitsinfinitely-many combinations of amplitude and frequency modu-lations (AM and FM, respectively). The standard approach is toenforce a non-negativity constraint on the AM, but this results indiscontinuities in the corresponding phase modulation (PM), andhence, an FM with discontinuities particularly when the under-lying AM-FM signal is over-modulated. In this letter, we analyzethe phase discontinuities and propose a technique to computesmooth AM and FM from the AS, by relaxing the non-negativityconstraint on the AM. The proposed technique iseffective athandling over-modulated signals. We present simulation results tosupport the theoretical calculations.

Seelamantula, Chandra SekharDepartment of Electrical Engineering, Indian Institute of Science, Bangalore-560012, India (författare)
Department of Electrical Engineering, Indian Institute of Science, Bangalore-560012, India (creator_code:org_t)

Ingår i:IEEE Signal Processing Letters: IEEE Signal Processing Society19:10, s. 623-6261070-99081558-2361

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