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گروه مهندسی کامپیوتر و فناوری اطلاعات، دانشکده فنی مهندسی، دانشگاه شاهد، تهران، ایران
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مرکز تحقیقات آکوستیک، دانشگاه شاهد، تهران، ایران
چکیده
موقعیتیابی بیدرنگ منابع صوتی از پیچیدگی محاسباتی و سرعتکم پاسخ رنج میبرد که به وجود نوفه، انعکاس و معماری چیدمان حسگرها جهت افزایش دقت و سرعت جهتیابی وابسته است. ارایه رویکرد مناسب مقیاسپذیر با پیچیدگی کم، مقاوم به انعکاس و نوفههای طبیعی و مصنوعی جهت افزایش سرعت تصمیمگیری با طراحی معماری مناسب از مباحث تحقیقاتی نوین درکاربردهای غیرنظامی و نظامی میباشد. این مقاله روش سریع مقیاسپذیر جهتیابی صوتیِ مقاوم به نوفهطبیعی و انعکاس برای تخمین سهبعدی جهتیابی با استفاده از تکنیک تأخیر زمان ورود علامتها پیشنهاد داده است که با برخورداری از معماری مناسب حسگرها و بکارگیری صافی طیففاز درکنار درونیابی اسپلاین مکعبی بدون پیشپردازش جهت حذف نوفه، از الگوریتم سریع کمینهسازی بدونمحدودیت متوالی بهره میبرد. در آزمایشات دادههای واقعی و مصنوعی میدان نزدیک، میزان خطای زاویه سمت و ارتفاع بهترتیب 0/5587 و 1/1652 درجه و در میدان دور بهترتیب 0321/0 و 2759/0 درجه است. سرعت بیدرنگ تعیین جهت برابر 1/006 ثانیه و دارای دقت بالای زاویه تخمین و موقعیت اصلی منبع است.
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علوم رایانش و فناوری اطلاعات