This lecture in a series of (Bilingual English/Arabic) lectures on

"Introduction to course Digital Signal Processing Course".

This lecture discusses the basic properties of the spectrum of discrete signals and frequency response of discrete systems by looking more at the properties of the discrete sinusoid, in particular, its periodicity in the frequency domain and symmetrical property.
محاضره في معالجة الاشارات الرقميه تناقش الاشارات الجيبيه المنفصله وخصائص الاشارات في المجال الترددي