in recent years, there has been renewed interest within the mobile and wireless networking communities in addressing
problems related to the sensing of signals using multi-antenna radios, such as MIMO Wi-Fi access points. Recent examples include systems that localize RFID tags [8] and Wi-Fi devices [6, 9], enhance Wi-Fi security [10], and passive radar systems that pinpoint human movements [1, 2, 4]. ese systems, and others, share an important common thread: they all rely
on phased array signal processing; a set of techniques that makes various comparisons between the radio signals received from each of the antennas of a radio. Phased array processing has been applied in weather and military radar, seismology, and astronomy to great bene t, but its application to indoor and outdoor wireless and mobile communications presents
new challenges and opportunities for novel system designs, as the above work demonstrates.
in recent years, there has been renewed interest within the mobile and wireless networking communities in addressingproblems related to the sensing of signals using multi-antenna radios, such as MIMO Wi-Fi access points. Recent examples include systems that localize RFID tags [8] and Wi-Fi devices [6, 9], enhance Wi-Fi security [10], and passive radar systems that pinpoint human movements [1, 2, 4]. ese systems, and others, share an important common thread: they all relyon phased array signal processing; a set of techniques that makes various comparisons between the radio signals received from each of the antennas of a radio. Phased array processing has been applied in weather and military radar, seismology, and astronomy to great bene t, but its application to indoor and outdoor wireless and mobile communications presentsnew challenges and opportunities for novel system designs, as the above work demonstrates.
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