Abstract: Typically, synthetic aperture radar (SAR) uses linear frequency modulation (LFM) signal to acquire high-resolution images, requiring spectral windowing to suppress sidelobes while ...

Abstract: As the electromagnetic spectrum becomes increasingly crowded, the random frequency and pulse repetition interval agile (RFPA) radar signal is proposed, which can make the transmitted ...

WUSA-TV Washington, D.C. Posted: December 16, 2025 | Last updated: December 16, 2025 Get a package that you didn't order? You may not want to scan the QR code inside. The FBI says it could be a scheme ...

Eeny, meeny, miny, mo, catch a tiger by the toe – so the rhyme goes. But even children know that counting-out rhymes like this are no help at making a truly random choice. Perhaps you remember when ...