ارائه یک روش ترکیبی برای مقابله با جمینگ موج پیوسته در گیرنده های GPS

نویسندگان

دانشکده مهندسی برق، دانشگاه علم و صنعت ایران

چکیده

مقابله با جمینگ از مهم‌ترین مباحث مطرح در حوزه GPS می‌باشد. از آن‌جا که جمینگ موج پیوسته (CW)، متداول‌ترین نوع جمینگ در این حوزه محسوب می‌شود، در این مقاله یک روش ترکیبی برای حذف اثر این نوع جمینگ ارائه شده است. روش پیشنهادی یک روش نرم‌افزاری قابل پیاده‌سازی در پردازنده دیجیتال گیرنده GPS می‌باشد که از فیلتر شکاف با پاسخ ضربه نامحدود و نیز تبدیل موجک برای زدودن اثر جمینگ بهره می‌گیرد. از ویژگی‌های روش ارائه‌شده، می‌توان به دقت بالای مکان‌یابی و نیز حجم محاسباتی کم (در نتیجه سرعت پردازش بالا) اشاره کرد. نتایج شبیه‌سازی روی داده‌های واقعی جمع‌آوری شده از یک گیرنده تک فرکانسه GPS، نشان می‌دهد که در حضور جمینگ CW، دقت مکان‌یابی گیرنده مجهز به سامانه پیشنهادی، مقدار 5/82 درصد نسبت به گیرنده مجهز به سامانه استاندارد، پیشرفت داشته است.

کلیدواژه‌ها


عنوان مقاله [English]

A New Method for Cancelling CW Jamming in GPS Receivers

چکیده [English]

Jamming cancellation is an important issue for global positioning system (GPS) receivers. As continuous wave (CW) jamming is the most widely used type of the jamming, this paper proposes a new anti-jamming system for mitigation CW jamming in GPS receivers. The proposed method employs infinite impulse response notch filters and wavelet transform for jamming mitigation. The proposed system can be implemented in the digital signal processor of the receiver. The computational complexity of the proposed method is low and it leads to an accurate positioning. Simulation results show that the proposed method has an average progress of 82.5% in term of positioning accuracy compared with standard method.
 

کلیدواژه‌ها [English]

  • Wavelet Transform
  • Jamming
  • Notch Filter
  • GPS Receiver
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