آشکارسازی سیگنال‌های تنک کوانتیزه‌شده با استفاده از آشکارساز بهینه محلی در شبکه‌های حسگر بی‌سیم
الموضوعات :عبدالرضا محمدی 1 , امین جاجرمی 2
1 - دانشكده مهندسی، گروه مهندسی برق، دانشگاه بجنورد
2 - دانشكده مهندسی، گروه مهندسی برق، دانشگاه بجنورد
الکلمات المفتاحية: سیگنال تنک, شبکه حسگر بی‌سیم, قوی‌ترین آزمون محلی, کانال کنترل غیرایده‌آل, کوانتیزاسیون,
ملخص المقالة :
در این مقاله، مسئله آشکارسازی توزیعی سیگنال‌های تنک را در یک شبکه حسگر بی‌سیم بررسی می‌کنیم. دو سناریو در نظر می‌گیریم؛ در سناریوی اول، حسگرها مشاهدات خود و در سناریوی دوم نسبت درست‌نمایی را به یک بیت کوانتیزه‌کرده و از طریق کانال کنترل غیرایده‌آل به مرکز ادغام ارسال می‌کنند. در مرکز ادغام با استفاده از روش قوی‌ترین آزمون محلی، دو آشکارساز پیشنهاد می‌دهیم و همچنین با استفاده از تحلیل مجانبی آشکارسازهای پیشنهادی، سطوح آستانه کوانتیزاسیون بهینه برای هر حسگر را تعیین می‌کنیم. با توجه به روابط به‌دست‌آمده می‌بینیم که سطوح کوانتیزاسیون برای هر حسگر به کیفیت کانال کنترل آن حسگر بستگی دارد. نهایتاً برای بررسی عملکرد آشکارسازهای پیشنهادی از شبیه‌سازی استفاده می‌شود که شبیه‌سازی‌های انجام‌شده نتایج تئوری را تأیید می‌کنند.
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