طراحی ماتریس کواریانس برای افزایش SINR در حضور تداخلکنندههای وابسته به سیگنال
محورهای موضوعی : مهندسی برق و کامپیوترمصطفي بوالحسنی 1 , سجاد ایمانی 2 , سیدعلی قرشی 3 *
1 - دانشگاه شهید بهشتی
2 - دانشگاه صنعتی شریف
3 - دانشگاه شهید بهشتی
کلید واژه: رادار MIMOطراحی شکل موجماتریس کواریانس SINR,
چکیده مقاله :
در این مقاله، مسئله طراحی ماتریس کواریانس جهت بیشینهکردن نسبت سیگنال به نویز به علاوه تداخل (SINR) در گیرنده برای رادارهای چندورودی- چندخروجی (MIMO) در نظر گرفته شده است. هدف از این پژوهش، طراحی ماتریس کواریانسی است که دارای قابلیت حذف تعداد تداخل بیشتری در مقایسه با رادارهای آرایه فازی و روشهای اخیر طراحی ماتریس کواریانس بوده و همچنین دارای SINR بیشتری نسبت به آنها و رادار MIMO با شکل موجهای متعامد باشد. در این مقاله حداکثر SINR ماتریس پیشنهادی به شکل بسته محاسبه شده و نتایج شبیهسازی نشان میدهد ماتریس پیشنهادی علاوه بر دارابودن کارایی بهتر نسبت به روشهای موجود طراحی ماتریس کواریانس، میتواند با استفاده از چندگانگی شکل موج و با تعداد آنتنهای برابر، تعداد تداخلکنندههای بیشتری را نسبت به رادار آرایه فازی و روشهای اخیر طراحی ماتریس کواریانس، حذف کند. نتایج شبیهسازي دستاوردهاي تحلیلی ارائهشده در این مقاله را تأیید میکند.
In this paper, the problem of covariance matrix design to increase signal-to-interference-plus-noise ratio (SINR) in receiver for multiple-input multiple-output (MIMO) radars is considered. Our goal is to design a covariance matrix which can suppress more interferers compared to phased array radar and recent covariance matrix design methods. It can also result in a better SINR level compared to conventional MIMO radars. In this paper, maximum SINR of the proposed covariance matrix is calculated in closed form. Simulation results show that our proposed covariance matrix in addition to achieve better SINR performance, can suppress more interferers compared to phased array radar and recent covariance matrix design methods, by using waveform diversity with the same number of antennas. Simulation results also validate analytical achievements that presented in this paper.
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