| 摘要 |
A method and system (FIG. 2 ) for facilitating detection of intruders into a wireless network, through the use of physical layer anomalies. One or more monitoring stations ( 22, 24, 26 ) can be distributed across the potential intruder's signal transmission region. They process these transmissions and extract attributes of the signals, which can then transmit to one or more fusion stations ( 28 ), which correlate the calculated attributes with stored attributes of signals of known, authorized users of the network, and transmit alert messages in the case that these signal attributes do not match those of known, authorized users. Signal attributes in accordance with the instant invention include the carrier frequency, spurious emissions, and power-on and power-down transients. Also in accordance with the instant invention are methods and systems using both direct and multipath received signal strength, signal-to-noise ratio, and geometric characteristics such as direction/angle of arrival (AOA), time of arrival, position/range, time dispersion, Doppler shift and polarization. |
