Haberleşme için RF Sistem Tasarımı · Dijital ders notu
Dual conversion, zero-IF, sliding IF ve dual band alıcılar
- Ders
- Haberleşme için RF Sistem Tasarımı (ELM667)
- Dönem
- 7. Dönem · 2024–2025 Güz
- Biçim
- PDF · 14 sayfa · 0,6 MB · el yazısı görünümlü LaTeX
- Orijinal not
- Ders-11.pdf
The digital notes were created from the handwritten notes with the help of Claude (Anthropic); they are meant as a supplementary resource and may contain errors. Always rely on the original notes and the official course materials.
Bu notta neler var?
- Dual Conversion receivers
- Disadvantages
- Advantages
- Removing Secondary Image
- Quadrature Signals & Quadrature Down conversion
- Zero-(Second) IF Heterodyne Receiver
- Sliding IF Receiver
- Dual Band Receiver
Notun metni
Düz metin olarak göster (formüller ve çizimler yoktur)
Sondaki Amp'nin lineerliği en büyük olmalı
dBc, carrier'e göre
Dual Conversion receivers
2 tane local oscillators
More mixing spurs
Several passive filters
clear choice for high sensitive radio receivers
High dynamic Range
Power consumption is lower
Secondary Image frequency
havadan sızdığı engellemek için sistem tasarımında dikkat veya sistemden ortaya çıkabilir.
Removing Secondary Image
Zero-IF (Homodyne)
eğer simetrik değilse
Quadrature Signals & Quadrature Down conversion
Positive frequency +90^° Clkwise
Zero-(Second) IF Heterodyne Receiver
Sliding IF Receiver
Both BPF and LNA reject the Image
RF bandına LO yaklaşınca image rejection zor olur
1/8 gibi bir şey kullanma image rejection zor olur
Dual Band Receiver
Çalışma sorusu 802.11a, 8 structure sliding Receiver
Mixing spurs in results of mixing with 3^rd harmonic of the first LO
& 3^rd harmonic of second LO