Method of locating a transmitting source in multipath environment and system thereof
First Claim
1. A method of locating a transmitting source in a multipath environment, the method comprising:
- obtaining, by each receiver K of a plurality of spatially separated receivers, a sequence of samples of a signal transmitted by the transmitting source and received by the receiver, each sample respectively associated with a time of obtaining said sample, wherein one or more receivers M among the plurality of receivers K each obtain a respective sequence of samples over a plurality of different positions along a respective trajectory r(t) with respect to the site associated with the respective receiver M; and
processing the obtained sequences of samples to identify the most likely location of the transmitting source,wherein said processing includes;
obtaining data indicative of an area of interest divided into a grid of potential locations of the transmitting source;
modifying the sequences of samples to generate, for each receiver and for each potential location in the grid, data indicative of an estimated sequence of samples likely to be received by the receiver over a plurality of times, the modifying based on a distance and a direction from the receiver to the potential location and a corresponding line of sight propagation of a signal transmitted from the potential location;
generating, for each given potential location in the grid, a matrix corresponding to the given potential location and associating each receiver with the estimated sequence of samples generated for the receiver for the corresponding location in the grid; and
comparing the matrices corresponding to different potential locations to identify the matrix corresponding to potential location with the highest likelihood of real location of the transmitting source.
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Accused Products
Abstract
There are provided a method of locating a transmitting source in multipath environment and system thereof. The method comprises: obtaining, by each receiver k of a plurality of spatially separated receivers, a sequence of samples of a signal received by the receiver, each sample respectively associated with a time of obtaining said sample, wherein one or more receivers m among the plurality of receivers k each obtain a respective sequence of samples over a plurality of different positions along a respective trajectory r(t) with respect to the site associated with the respective receiver m; and processing the obtained sequences of samples to identify the most likely location of the transmitting source. Optionally, most likely location can be estimated using a grid of potential locations within an area of interest.
14 Citations
11 Claims
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1. A method of locating a transmitting source in a multipath environment, the method comprising:
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obtaining, by each receiver K of a plurality of spatially separated receivers, a sequence of samples of a signal transmitted by the transmitting source and received by the receiver, each sample respectively associated with a time of obtaining said sample, wherein one or more receivers M among the plurality of receivers K each obtain a respective sequence of samples over a plurality of different positions along a respective trajectory r(t) with respect to the site associated with the respective receiver M; and processing the obtained sequences of samples to identify the most likely location of the transmitting source, wherein said processing includes; obtaining data indicative of an area of interest divided into a grid of potential locations of the transmitting source; modifying the sequences of samples to generate, for each receiver and for each potential location in the grid, data indicative of an estimated sequence of samples likely to be received by the receiver over a plurality of times, the modifying based on a distance and a direction from the receiver to the potential location and a corresponding line of sight propagation of a signal transmitted from the potential location; generating, for each given potential location in the grid, a matrix corresponding to the given potential location and associating each receiver with the estimated sequence of samples generated for the receiver for the corresponding location in the grid; and comparing the matrices corresponding to different potential locations to identify the matrix corresponding to potential location with the highest likelihood of real location of the transmitting source. - View Dependent Claims (2, 3, 4, 5)
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6. A system for locating a transmitting source in a multipath environment, comprising:
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a plurality of spatially separated receivers K, each receiver K configured to obtain a sequence of samples of a signal transmitted by the transmitting source and received by the receiver, each sample respectively associated with a time of obtaining said sample, wherein one or more receivers M among the plurality of receivers K are each configured to obtain a respective sequence of samples over a plurality of different positions along a respective trajectory r(t) with respect to the site associated with the respective receiver M; and a processor and memory module operatively connected to the plurality of spatially separated receivers K and configured to process the sequences of samples obtained by the plurality of spatially separated receivers K to identify the most likely location of the transmitting source, wherein the processor and memory module is configured to; obtain data indicative of an area of interest divided into a grid of potential locations of the transmitting source; modify the sequences of samples to generate, for each receiver and for each potential location in the grid, data indicative of an estimated sequence of samples likely to be received by the receiver over a plurality of times, the modifying based on a distance and a direction from the receiver to the potential location and a corresponding line of sight propagation of a signal transmitted from the potential location; generate, for each given potential location in the grid, a matrix corresponding to the given potential location and associating each receiver with the estimated sequence of samples generated for the receiver for the corresponding location in the grid; and compare the matrices corresponding to different potential locations to identify the matrix corresponding to potential location with the highest likelihood of real location of the transmitting source. - View Dependent Claims (7, 8, 9, 10)
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11. A computer program product comprising a program of instructions readable by a computer, the program of instructions for executing a method of locating a transmitting source in a multipath environment, the method comprising:
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obtaining, by each receiver K of a plurality of spatially separated receivers, a sequence of samples of a signal transmitted by the transmitting source and received by the receiver, each sample respectively associated with a time of obtaining said sample, wherein one or more receivers M among the plurality of receivers K each obtain a respective sequence of samples over a plurality of different receiving positions along a respective trajectory r(t) with respect to the site associated with the respective receiver M; and processing the obtained sequences of samples to identify the most likely location of the transmitting source, wherein said processing includes; obtaining data indicative of an area of interest divided into a grid of potential locations of the transmitting source; modifying the sequences of samples to generate, for each receiver and for each potential location in the grid, data indicative of an estimated sequence of samples likely to be received by the receiver over a plurality of times, the modifying based on a distance and a direction from the receiver to the potential location and a corresponding line of sight propagation of a signal transmitted from the potential location; generating, for each given potential location in the grid, a matrix corresponding to the given potential location and associating each receiver with the estimated sequence of samples generated for the receiver for the corresponding location in the grid; and comparing the matrices corresponding to different potential locations to identify the matrix corresponding to potential location with the highest likelihood of real location of the transmitting source.
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Specification