تأثیر انواع اندازه‌گیری‌ها و چینش حسگرها در مکان‌یابی هدف با پردازش سیگنال‌های مراقبت در رادار غیرفعال چند فرستنده و چند گیرنده

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری، دانشکده مهندسی برق، دانشگاه صنعتی خواجه نصیرالدین طوسی تهران، ایران

2 استاد، دانشکده مهندسی برق، دانشگاه صنعتی خواجه نصیرالدین طوسی تهران، ایران

چکیده

مکان‌یابی اهداف به‌وسیله رادار غیرفعال یکی از زمینه‌های پرکاربرد در تحقیقات نظامی و تجاری است. در این مقاله سناریو پردازش سیگنال‌های مراقبت تنها در رادار غیرفعال چند فرستنده و چند گیرنده را بررسی می‌کنیم. این سناریوها شامل پردازش متمرکز سیگنال‌های بازتاب دریافتی در حسگر مرکزی و پردازش غیرمتمرکز سیگنال‌های بازتاب در حسگرهای گیرنده است. انواع اندازه‌گیری‌های ممکن شامل Time Difference of Arrival (TDOA)، Gain Ratio of Arrival (GROA)،Angle of Arrival (AOA) و ترکیب‌هایشان تحت سناریوهای مختلف ارائه شده است. باند پایین Cramer Rao برای خطای تخمین مکان هدف با این اندازه‌گیری‌ها برای سناریوهای پردازش متمرکز سیگنال‌های مراقبت به‌منظور محاسبه اندازه‌گیری‌های TDOA و GROA و پردازش غیرمتمرکز سیگنال‌های مراقبت به‌منظور محاسبه اندازه‌گیری‌های AOA را ارائه شده است. تأثیر سناریوهای متفاوت پردازش سیگنال و انواع اندازه‌گیری‌ها بر کارآیی تخمین مکان هدف به‌وسیله CRLB بررسی شده است. همان‌طور که در نتایج شبیه‌سازی نشان داده شده است، استفاده توأم از اندازه‌گیری‌ها همواره کارآیی بهتر از استفاده تنهای آنها دارد و قرار دادن حسگرهای گیرنده در فواصل دور کارآیی را بسیار زیاد بهبود می‌بخشد.

کلیدواژه‌ها


عنوان مقاله [English]

Investigating the Influence of Various Measurements and Sensor Arrangements on Target Location Estimation by Processing the Surveillance Signals in Multi-Transmitter Multi-Receiver Passive Radar

نویسندگان [English]

  • S. Fooladi Talari 1
  • K. Mohamedpour 2
1 PhD student, Faculty of Electrical Engineering, Khajeh Nasiruddin Toosi University of Technology, Tehran, Iran
2 Professor, Faculty of Electrical Engineering, Khajeh Nasiruddin Toosi University of Technology, Tehran, Iran
چکیده [English]

Passive radar research has many applications in military and commercial fields. In this paper, we investigate the scenarios of surveillance signal processing in multi-transmitter and multi-receiver passive radar. These scenarios include centralized processing of the received signals reflected from the target at the central sensor and decentralized processing of the reflected signals at the receiving sensors. Different types of possible measurements including time difference of arrival (TDOA), gain ratio of arrival (GROA), angle of arrival (AOA), and their combinations are presented under different scenarios. To calculate TDOA and GROA measurements, the centralized processing and for calculation of AOA measurements, the decentralized processing of surveillance signals are performed. The impact of different signal processing scenarios and types of measurements on the efficiency of target location estimation has been investigated by the CRLB. As shown in the simulation results, the combined use of the measurements is always better than their individual employment and, the far-field placement of receiving sensors, significantly improves the efficiency.

کلیدواژه‌ها [English]

  • MIMO Passive Radar
  • Multi transmitter multi receiver radar
  • Target localization
  • Surveillance signals processing
  • Cramer Rao Lower bound
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