{"title":"Signal Processing Basics (Part 1): The Fourier Link Between the Rectangular Function and the Sinc Function","published":"2026-01-23 11:00:09","height":"190","blog_title":"Ken-Chaos\u2019s Random Notes on R","url":"https://chaos-r.hatenadiary.jp/entry/2026/01/23/110009","version":"1.0","type":"rich","author_url":"https://blog.hatena.ne.jp/chaos_kiyono/","categories":["Fourier Transform"],"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fchaos-r.hatenadiary.jp%2Fentry%2F2026%2F01%2F23%2F110009\" title=\"Signal Processing Basics (Part 1): The Fourier Link Between the Rectangular Function and the Sinc Function - Ken-Chaos\u2019s Random Notes on R\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","description":"To understand power spectra of time series, characteristics of filters, and basic properties of the delta function, it is essential to understand the relationship between the rectangular function and the sinc function. With that in mind, this article discusses the rectangular function and the sinc f\u2026","provider_url":"https://hatena.blog","author_name":"chaos_kiyono","blog_url":"https://chaos-r.hatenadiary.jp/","provider_name":"Hatena Blog","image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/c/chaos_kiyono/20260123/20260123105256.png","width":"100%"}