کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4624173 1339534 2006 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Analytic signals and harmonic measures
موضوعات مرتبط
مهندسی و علوم پایه ریاضیات آنالیز ریاضی
پیش نمایش صفحه اول مقاله
Analytic signals and harmonic measures
چکیده انگلیسی

We prove that a sufficient and necessary condition for HeiΘ(s)=−ieiΘ(s), where H is Hilbert transformation, Θ is a continuous and strictly increasing function with |Θ(R)|=2π, is that dΘ(s) is a harmonic measure on the line. The counterpart result for the periodic case is also established. The study is motivated by, and has significant impact to time–frequency analysis, especially to aspects of analytic signals inducing instantaneous amplitude and frequency. As a by-product we introduce the theory of Hardy-space-preserving weighted trigonometric series and Fourier transformations induced by harmonic measures in the respective contexts.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Mathematical Analysis and Applications - Volume 314, Issue 2, 15 February 2006, Pages 526-536