حذف سیگنال مسیر مستقیم در رادار دهانه مصنوعی غیر فعال چند پایه مبتنی بر سیگنال DVB-T با استفاده از الگوریتم‌های حسگری فشرده

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری، دانشگاه صنعتی شیراز، شیراز، ایران

2 دانشیار، دانشگاه صنعتی شیراز، شیراز، ایران

چکیده

در این مقاله یک روش جدید با استفاده از الگوریتم‌های حسگری فشرده برای حذف سیگنال مسیر مستقیم در رادار دهانه مصنوعی غیرفعال چندپایه ارائه می‌شود که در ساختار چندپایه گیرنده متحرک و فرستنده‌های مغتنم ثابت می‌باشند. سیگنال مغتنم مورداستفاده به‌منظور تشکیل تصویر DVB-T است. برای بهبود قدرت تفکیک در جهت برد در رادار SAR غیرفعال از چند فرستنده مغتنم استفاده می‌شود. در این مقاله ابتدا یک مدل خطی برای ساختار رادار SAR غیرفعال چندپایه در حضور سیگنال مسیر مستقیم استخراج شده و سپس با استفاده از الگوریتم‌های حسگری فشرده اقدام به حذف آنها می‌گردد. در مدل استخراجی دامنه سیگنال مسیر مستقیم مختلط در نظر گرفته شده است. نتایج شبیه‌سازی نیز تأیید می‌کند که الگوریتم حذف سیگنال مسیرهای مستقیم به کمک حسگری فشرده دارای عملکرد مطلوبی می‌باشد.

کلیدواژه‌ها


عنوان مقاله [English]

Direct signal cancellation in multistatic passive synthetic aperture radar based on DVB-T signal using compressed sensing algorithm

نویسندگان [English]

  • Farzad Ansari 1
  • Sadegh Samadi 2
  • reza mohseni 2
1 PhD student, Shiraz University of Technology, Shiraz, Iran
2 Associate Professor, Shiraz University of Technology, Shiraz, Iran
چکیده [English]

This paper presents a new method of clean processing for cancelling direct signal from the reference channel using Compressed Sensing (CS) in a Multistatic passive synthetic aperture radar (MPSAR) based on DVB-T signal, whose opportunity transmitters are stationary and receiver is moving. This paper develops the linear system model of MPSAR in presence of the direct signal interference and then proposes an CS based algorithm to cancel it. The direct signal amplitude is complex in extractive model. The simulation results indicate that the proposed algorithm (CS) is effective for direct signal cancellation.

کلیدواژه‌ها [English]

  • Compressed sensing
  • Multistatic synthetic aperture radar
  • DVB-T signal

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دوره 10، شماره 2 - شماره پیاپی 28
شماره پیاپی 28، فصلنامه پاییز و زمستان
دی 1401
صفحه 15-29
  • تاریخ دریافت: 24 آبان 1401
  • تاریخ بازنگری: 21 آذر 1401
  • تاریخ پذیرش: 13 دی 1401
  • تاریخ انتشار: 01 بهمن 1401