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حذف سیگنال مسیر مستقیم در رادار دهانه مصنوعی غیر فعال چند پایه مبتنی بر سیگنال DVB-T با استفاده از الگوریتمهای حسگری فشرده | ||
رادار | ||
مقاله 2، دوره 10، شماره 2 - شماره پیاپی 28، دی 1401 | ||
نوع مقاله: مقاله پژوهشی | ||
نویسندگان | ||
فرزاد انصاری1؛ صادق صمدی* 2؛ رضا محسنی2 | ||
1دانشجوی دکتری، دانشگاه صنعتی شیراز، شیراز، ایران | ||
2دانشیار، دانشگاه صنعتی شیراز، شیراز، ایران | ||
تاریخ دریافت: 24 آبان 1401، تاریخ بازنگری: 21 آذر 1401، تاریخ پذیرش: 13 دی 1401 | ||
چکیده | ||
در این مقاله یک روش جدید با استفاده از الگوریتمهای حسگری فشرده برای حذف سیگنال مسیر مستقیم در رادار دهانه مصنوعی پسیو چند پایه ارائه میشود، که در ساختار چند پایه گیرنده متحرک و فرستندههای مغتنم ثابت میباشند. سیگنال مغتنم مورد استفاده به منظور تشکیل تصویر DVB-T است. برای بهبود رزولوشن در جهت برد در رادار SAR پسیو از چند فرستنده مغتنم استفاده میشود. در این مقاله ابتدا یک مدل خطی برای ساختار رادار SAR پسیو چند پایه 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 تایید میکند که الگوریتم حذف سیگنال مسیر های مستقیم به کمک حسگری فشرده دارای عملکرد مطلوبی میباشد. | ||
کلیدواژهها | ||
حسگری فشرده؛ رادار دهانه مصنوعی غیر فعال چند پایه؛ سیگنال DVB-T | ||
عنوان مقاله [English] | ||
Direct signal cancelation in multistatic passive synthetic aperture radar based on DVB-T signal using compressed sensing algorithms | ||
نویسندگان [English] | ||
Farzad Ansari1؛ Sadegh Samadi2؛ reza mohseni2 | ||
1PhD student, Shiraz University of Technology, Shiraz, Iran | ||
2Associate Professor, Shiraz University of Technology, Shiraz, Iran | ||
چکیده [English] | ||
In this paper, a new method is presented to cancel the direct signal in multistatic passive synthetic aperture radar using compressed sensing algorithm. The receiver is movable and the opportunity transmitters are fixed in the multistatic geometry. The opportunity transmitters are DVB-T for imaging. Multiple transmitters are used to improve the range resolution in the passive SAR. In this paper, first, a linear model for the multistatic passive SAR is extracted in the presence of the direct signal, and then they are canceled using compressed sensing algorithm. The amplitude of direct signal is considered complex in the extractive model. The simulation results also confirm that the compressed sensing algorithm for cancelling the direct signal has a good performance. | ||
کلیدواژهها [English] | ||
compressed sensing, multistatic synthetic aperture radar, DVB-T signal | ||
مراجع | ||
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