شبیه‌ساز سریع دادۀ خام اهداف متحرک در تصویربرداری نواری با رادار دهانه مصنوعی

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشگاه شهید چمران

چکیده

دسترسی به یک مولد سریع و دقیق دادۀ خام اهداف متحرک در تصویربرداری با رادار دهانه مصنوعی، به‌ویژه در کاربردهای مربوط به آشکارسازی هدف متحرک زمینی، از اهمیت زیادی برخوردار است. در این مقاله، از ترکیب حوزۀ زمان و فرکانس، یک الگوریتم سریع برای تولید دادۀ خام اهداف متحرک در تصویربرداری نواری با این رادار، ارائه شده است. با استفاده از این شبیه‌ساز، در شرایط مختلف از نظر سرعت، شتاب و جهت حرکت هدف، دادۀ خام رادار تولید شده و با بهره‌گیری از الگوریتم بُرد-داپلر، تصویر نهایی آن استخراج شده است. سپس، تصاویر به‌دست آمده، با بهره-گیری از روابط استخراج شده برای پیش‌بینی اثر پارامترهای حرکت هدف بر تصاویر رادار، مورد مطالعه قرار گرفته است. نتایج به‌دست آمده نشان می‌دهد که شبیه‌ساز پیشنهادی، از لحاظ سرعت و دقت، نسبت به سایر شبیه‌سازهای موجود از عملکرد بهتری برخوردار است.

کلیدواژه‌ها

عنوان مقاله [English]

A Fast Strip-Mode Synthetic Aperture Radar Raw Data Simulator of Moving Targets

نویسندگان [English]

  • Meysam Mohammadi
  • Alimorad Mahmoudi
چکیده [English]

A fast and accurate synthetic aperture radar raw data generator of moving targets has high
importance, especially in the applications of the ground moving target indication. In this paper,
by the hybrid time-frequency domain, a fast algorithm has been proposed for strip mode SAR
raw data generation of moving targets. Using this simulator, in different conditions in terms of
target motion speed, acceleration and direction, radar raw data has been generated and its final
image has been extracted by Range-Doppler Algorithm. Then, the obtained images have been
studied using the formula that have been extracted for predicting the effects of target motion
parameters in the SAR images. The results show that the proposed simulator has a better
performance in terms of speed than other existing simulators.

کلیدواژه‌ها [English]

  • Raw Data
  • Synthetic aperture Radar
  • Strip-Mode Imaging
  • Moving Targets
  • Range-Doppler Algorithm

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رادار
دوره 4، شماره 1 - شماره پیاپی 1
651
اردیبهشت 1395
صفحه 37-48

فایل ها

سابقه مقاله

  • تاریخ دریافت: 31 تیر 1394
  • تاریخ بازنگری: 02 بهمن 1402
  • تاریخ پذیرش: 28 شهریور 1397
  • تاریخ انتشار: 01 اردیبهشت 1395

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