Digital Communications – Lecture 10 – Matched filter, ISI and the first Nyquist criterion

Lecture 10 – Matched filter, ISI and the first Nyquist criterion

Sayısal Haberleşme – Matched filter, SAK ve 1. Nyquist kriteri

Course: Digital Communications (ELM365)
Semester: Semester 6 · Spring 2023–24
Format: PDF · 9 pages · 0.3 MB · handwriting-style LaTeX
Language: Turkish
Original note: Ders-10.pdf

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! Formüllerin nasıl çıktığını öğren

Soruda h(t) s_1(t) 'yi karşılıyor dersek h(t)=s_1(T-t) olur integral devresinde

Transfer function of a MF is H(f)=2-2e^-j2π fTj2π f

a) Find impulse response of MF and sketch it.

b) '' the pulse s(t) matched by this MF an sketch it.

c) If this s(t) is applied to the input of MF, find the output signal of the MF and sketch it. Find the value at the sample instant.

d) If this s(t) is applied to the input of the corelator, find the output signal of the correlator and sketch it. Find the value at the simple instant.

Semboller arası karışım (SAK)

(Inter symbol Interference - ISI)

(Pulse shaping - Darbe şekillendirme)

Sıfır SAK için 1. Nyquist kriteri

(1st Nyquist criterion for zero ISI)

ideal Nyquist filter for zero ISI

mavinin katkısı 1, siyahın 0 semboller arası karışım 0

Senkron hatasını yaptığımızı düşünelim sembol arası karışım olabilir.

Raised cosine (RC) darbesi

Daha yüksek azalma hızına sahiptir senkronizasyon hatası azalır

1. Nyquist kriterinin diğer ifadesi

Lecture 10 – Matched filter, ISI and the first Nyquist criterion

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