الملخص
تهدف هذه الدراسة إلى تحسين أداء نظام STAR-passive-OIRS القابل لإعادة التكوين في أنظمة الاتصالات الضوئية في الفضاء الحر القائمة على MIMO. تركز الدراسة على تحليل تأثير عاملين رئيسيين: عدد العناصر العاكسة وموقع السطح الذكي. أظهرت تقنية STAR-RIS إمكانات كبيرة في تحسين كفاءة الطيف ونسبة الإشارة إلى الضوضاء والتداخل (SINR) وزيادة مكسب القناة، من خلال توفير تغطية بزاوية 360 درجة وتقليل التداخل في البيئات ذات قيود خط البصر (LOS). تكشف النتائج أن زيادة عدد العناصر العاكسة يعزز قوة الإشارة ويحسن نسبة الإشارة إلى الضوضاء والتداخل بينما يحقق وضع السطح الذكي أقرب إلى المصدر أو المستقبل الأداء الأمثل. تسلط الدراسة الضوء على قدرة تقنية STAR-RIS على التغلب على قيود أنظمة FSO التقليدية وتحسين أداء الشبكة في بيئات الاتصالات اللاسلكية الحديثة.
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