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Device-free localization, which does not require any device attached to the target, is playing a critical role in many applications, such as intrusion detection, elderly monitoring and so on. This paper introduces D-Watch, a device-free system built on the top of low cost commodity-off-the-shelf RFID hardware. Unlike previous works which consider multipaths detrimental, D-Watch leverages the “bad”...
This paper proposes a cognitive radio frequency (RF) stealth radar using phased array (PA) for surveillance applications. Since the traditional surveillance systems are accessible by intercept receivers, the series of low-gain beam is used to reduce the visibility of this system. The traditional high-gain PA antenna beam is replaced by the novel beam. And the original detection performance isnot degraded...
Different from a phased-array, frequency diverse array (FDA) offers a range-dependent beampattern. By jointly utilizing the advantages of cognitive radar in environment sensing and FDA with range-dependent transmit beampattern, this paper proposes a cognitive target tracking scheme using FDA radar for increased output signal-to-interferences plus noise ratio (SINR) performance due to its range-dependent...
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