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US 2014/0274166 A1Published application
Maximum likelihood localization in the presence of channel uncertainties
AssigneeArizona Board of Regents, a body corporate of the State of Arizona, acting for and on behalf of Ariz
InventorsXue Zhang, Cihan Tepedelenlioglu, Mahesh K. Banavar, Andreas Spanias
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Abstract
Some embodiments include a wireless sensor network system. Other embodiments of related systems and methods are also disclosed.
Claims20
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.
5 more elements
A wireless sensor network system comprising:
- a sensor node device;
- a plurality of anchor sensors each having a known location and in communication with the sensor node device over a wireless fading communication channel;
- and
- a computer system comprising one or more processing modules and one or more non-transitory memory storage modules storing computer instructions configured to run on the one or more processing modules and perform the acts of:
- receiving from each anchor sensor of the plurality of anchor sensors a time-of-arrival measurement;
- and
- determining a maximum likelihood estimation for the sensor node device.
4 more elements
A method of providing a wireless sensor network system comprising:
- providing a sensor node device;
- providing a plurality of anchor sensors each having a known location and in communication with the sensor node device over a wireless fading communication channel;
- and
- providing a computer system comprising a computer video display, the computer system having non-transitory memory storing instructions that cause the computer system to:
- receive from each anchor sensor a time-of-arrival measurement;
- determine a result from at least one of (a) a maximum likelihood estimation for the wireless fading communication channel, (b) a Cramer-Rao lower bound benchmark for a one-dimensional network, (c) a Cramer-Rao lower bound benchmark for a two-dimensional network, (d) a modified Cramer-Rao lower bound benchmark for a one-dimensional network, or (e) a modified Cramer-Rao lower bound benchmark for a two-dimensional network;
- and
- display the result at the computer video display.
5 more elements
Dependencies are inferred from the claim text.