Sun'iy yo'ldosh aloqa kanallarini modellashtirish va simulyatsiya qilish asosida samaradorlikni oshirish usullari

Ushbu maqolada sun'iy yo'ldosh aloqa kanallari xususiyatlarini modellashtirish va tahlil qilish usullari yoritiladi. GEO va LEO ssenariylari uchun AWGN, Rayleigh, Rician va gibrid modellar asosida MATLAB/Simulink, NS-3 hamda STK vositalarida simulyatsiyalar o'tkazildi. GEO–Toshkent kanalida o'rtacha SNR 19.7 dB, yomg'ir zonasida esa 11.3 dB gacha pasayishi kuzatildi. QPSK va 16-QAM modulyatsiyalari bo'yicha BER qiymatlari mos ravishda 2.3×10⁻³ (10 dB) va 4.1×10⁻³ (15 dB) ni tashkil etdi. LEO (1,200 km) ssenariysida maksimal Doppler siljishi ±190 kHz gacha yetdi. Yomg'ir intensivligi 25 mm/soatda availability 87 %, 50 mm/soatda esa 74 % gacha kamaydi. Natijalar kanal sharoitlarini hisobga olgan holda adaptiv modulyatsiya va kodlashni qo'llash zarurligini ko'rsatadi

Related Organizations

Al-Khwarizmi University
Uzbekistan

Keywords

MATLAB, NS-3, AWGN, sun'iy yo'ldosh aloqa tizimlari, kanal modellashtirish, fading, Rician, SNR

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