MAXIMUM LIKELIHOOD LOCALIZATION IN THE PRESENCE OF CHANNEL UNCERTAINTIES

摘要

Some embodiments include a wireless sensor network system. Other embodiments of related systems and methods are also disclosed.

主权项

1. A method of localizing a sensor node device in communication with a plurality of anchor sensors each having a known location, the communication occurring over a wireless fading communication channel, the method comprising:
transmitting a first signal from each anchor sensor of the plurality of anchor sensors to the sensor node device over the wireless fading communication channel; receiving the first signal at the sensor node device; transmitting a second signal from the sensor node device to each anchor sensor of the plurality of anchor sensors, wherein the transmitting occurs over the wireless fading communication channel after receipt of the first signal; receiving the second signal at each anchor sensor of the plurality of anchor sensors during a first time period after such anchor sensor transmitted the first signal; determining for each anchor sensor of the plurality of anchor sensors a time-of-arrival measurement based at least in part upon the first time period; determining a maximum likelihood estimation for the sensor node device; and displaying at a computer video display a location estimation of the sensor node device based at least in part on the maximum likelihood estimation.