LOCATION DETERMINATION IN SENSOR NETWORKS USING TIME-WINDOW ALGORITHM
First Claim
1. A method of determining a location of a transmitter, comprising:
- reading a signal strength of a signal transmitted by the transmitter by each of a plurality of receivers, at each frequency in a plurality of frequencies;
extracting phase information using an amplitude of the signal at each of the plurality of frequencies;
applying a transform to the signal in the frequency domain to obtain a representation of the signal in the time domain;
applying a time window to the signal in the time domain to eliminate reflected multipath signals that arrive to the respective receivers later than a line-of-sight signal to obtain a windowed time domain signal; and
calculating a location of the transmitter using the windowed time domain signal.
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Accused Products
Abstract
A network system and a method of determining a location of a transmitter are described. The method includes reading a signal strength of a signal transmitted by the transmitter by each of a plurality of receivers, at each frequency in a plurality of frequencies, extracting phase information using an amplitude of the signal at each of the plurality of frequencies, and applying a transform (such as a Fourier Transform) to the signal in the frequency domain to obtain a representation of the signal in the time-domain. The method further includes applying a time window to the signal in the time-domain to eliminate reflected multipath signals that arrive to the respective receivers later than a line-of-sight signal to obtain a windowed signal in the time domain, and calculating a location of the transceiver using the windowed time domain signal.
24 Citations
8 Claims
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1. A method of determining a location of a transmitter, comprising:
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reading a signal strength of a signal transmitted by the transmitter by each of a plurality of receivers, at each frequency in a plurality of frequencies; extracting phase information using an amplitude of the signal at each of the plurality of frequencies; applying a transform to the signal in the frequency domain to obtain a representation of the signal in the time domain; applying a time window to the signal in the time domain to eliminate reflected multipath signals that arrive to the respective receivers later than a line-of-sight signal to obtain a windowed time domain signal; and calculating a location of the transmitter using the windowed time domain signal. - View Dependent Claims (2, 3, 4)
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5. A network of receivers, comprising:
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a plurality of receivers, each receiver being configured to receive a signal from a transmitter; and a command and control center in communication with the plurality of receivers, the command and control center being configured to apply a time-window algorithm to the signal received by the receivers to determine the location of the transmitter; wherein the time window algorithm comprises determining a signal strength of the signal by each of the plurality of receivers at each frequency in a plurality of frequencies; extracting phase information using amplitude of the signal at each of the plurality of frequencies; applying a transform to the signal in the frequency domain to obtain a representation of the signal in the time domain; applying a time window to the representation of the signal in the time domain to eliminate reflected multipath signals that arrive later than a line-of-sight signal to obtain a windowed time domain signal; and calculating a location of the transmitter using the windowed time domain signal. - View Dependent Claims (6, 7, 8)
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Specification
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- Resources
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Current AssigneeZylaya Corporation
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Original AssigneeZylaya Corporation
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InventorsLicul, Stanislav
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Application NumberUS11/760,962Publication NumberTime in Patent OfficeDaysField of SearchUS Class Current708/308CPC Class CodesG01S 5/0218 Multipath in signal receptionH04W 64/00 Locating users or terminals...
