مکان یابی و تخمین موقعیت زاویه ای هدف با یک المان گیرنده با استفاده از آرایه های با چندگانگی فرکانسی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری، دانشگاه شیراز، شیراز، ایران

2 استاد، دانشگاه شیراز، شیراز، ایران

چکیده

آرایه‌های با چندگانگی فرکانسی (FDA)، آرایه‌هایی هستند که در آن‌ها یک شکل موج واحد روی تمامی المان‌ها با اختلاف ناچیزی در فرکانس حامل اعمال می‌شود. همین اختلاف اندک در فرکانس حامل، منجر به ایجاد یک الگوی پرتوی وابسته به برد می‌گردد که برخلاف الگوی پرتوی مستقل از برد رایج در رادار آرایه فازی می‌باشد. در این مقاله، سیگنال دریافتی ناشی از یک آرایه خطی با چندگانگی فرکانسی مدل‌سازی و شبیه‌سازی شده و نشان داده ‌شده است که این سیگنال، تابعی از برد و زاویه است. در ادامه و با بررسی عمیق‌تر سیگنال دریافتی در آرایه FDA، قابلیت زاویه سنجی اهداف تنها با یک المان گیرنده در این آرایه‌ها اثبات شده و درنهایت الگوریتمی مبتنی بر خاصیت تزویج برد-زاویه ذاتی موجود در آرایه‌های با چندگانگی فرکانسی به‌منظور تخمین زاویه هدف تنها با یک المان در دریافت، در سناریوهای تک‌هدفه و چندهدفه پیشنهاد شده است. نتایج شبیه‌سازی کارایی الگوریتم پیشنهادی را تأیید می‌کنند.

کلیدواژه‌ها


عنوان مقاله [English]

Target Localization by One Element Reciever Using Frequency Diverse Array Radars

نویسندگان [English]

  • Marziye Golabi 1
  • Abbas Sheikhi 2
  • Mehrzad Biguesh 2
1 PhD student, Shiraz University, Shiraz, Iran
2 Professor, Shiraz University, Shiraz, Iran
چکیده [English]

Frequency Diverse Arrays (FDAs), are kind of arrays in which a unique waveform is transmitted from each element by a small carrier frequency offset across the array elements. This small carrier frequency offset in frequency diverse array (FDA) radars leads to the interesting range-angle-time dependent beampattern of FDA radars which is different from the angle only dependent beampattern of phased arrays. In this paper, the received signal from a linear frequency diverse array radar is modeled and simulated and it is shown that this signal is a function of range and angle. Then by investigating the received signal from FDA radars more deeply, the possibility of target localization using one element receiver in these arrays is proved. Finally, based on the intrinsic coupling between the range and angle in FDA radars, the algorithm for target localization by one element receiver in one-target and multiple-target scenarios is proposed. The simulation results show the validity of the proposed algorithm.

کلیدواژه‌ها [English]

  • Frequency Diverse Arrays
  • DOA estimation
  • Target localization
  • range-angle coupling
  • matched filter
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