Methods and apparatus for position location in a wireless network
First Claim
1. A method for determining a position of a device in a network, the method comprising:
- decoding a symbol comprising subcarriers to determine identification information that identifies a transmitter, the decoding comprising partitioning the subcarriers of the symbol;
determining a channel estimate associated with the transmitter;
repeating the decoding and the determining for a plurality of symbols so that a plurality of transmitters associated with a plurality of channel estimates, respectively, are determined; and
obtaining the position of the device based at least in part on positions of the plurality of transmitters.
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Accused Products
Abstract
Methods and apparatus for position location in a wireless network. In an aspect, a method is provided that includes determining whether a symbol to be transmitted is an active symbol, wherein the symbol comprises a plurality of subcarriers, and encoding identification information on a first portion of subcarriers if it is determined that the symbol is the active symbol. The method also includes encoding idle information on a second portion of subcarriers if it is determined that the symbol in not the active symbol. In an aspect, an apparatus includes detector logic configured to decode a plurality of symbols to determine identification information that identifies a plurality of transmitters, and to determine a plurality of channel estimate associated with the plurality of transmitters. The apparatus also includes position determination logic configured to calculate a device position based on the plurality of transmitters and the plurality of channel estimates.
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Citations
40 Claims
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1. A method for determining a position of a device in a network, the method comprising:
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decoding a symbol comprising subcarriers to determine identification information that identifies a transmitter, the decoding comprising partitioning the subcarriers of the symbol; determining a channel estimate associated with the transmitter; repeating the decoding and the determining for a plurality of symbols so that a plurality of transmitters associated with a plurality of channel estimates, respectively, are determined; and obtaining the position of the device based at least in part on positions of the plurality of transmitters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus for determining a position of a device in a network, the apparatus comprising:
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means for decoding a symbol comprising subcarriers to determine identification information that identifies a transmitter, the means for decoding comprising means for partitioning the subcarriers of the symbol; means for determining a channel estimate associated with the transmitter; means for repeating the decoding and the determining for a plurality of symbols so that a plurality of transmitters associated with a plurality of channel estimates, respectively, are determined; and means for obtaining the position of the device based at least in part on positions of the plurality of transmitters. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A computer program product for determining a position of a device in a network, the computer program product comprising:
a non-transitory computer-readable medium having program code recorded thereon, the program code comprising; program code to decode a symbol comprising subcarriers to determine identification information that identifies a transmitter, the program code to decode comprising program code to partition the subcarriers of the symbol; program code to determine a channel estimate associated with the transmitter; program code to repeat the decoding and the determining for a plurality of symbols so that a plurality of transmitters associated with a plurality of channel estimates, respectively, are determined; and program code to obtain the position of the device based at least in part on positions of the plurality of transmitters. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. An apparatus configured to determine a position of a device in a network, the apparatus comprising:
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a memory unit; and at least one processor coupled to the memory unit;
the at least one processor configured;to decode a symbol comprising subcarriers to determine identification information that identifies a transmitter, in which the decoding comprises partitioning the subcarriers of the symbol; to determine a channel estimate associated with the transmitter using the subcarriers of the symbol; to repeat the decoding and the determining for a plurality of symbols so that a plurality of transmitters associated with a plurality of channel estimates, respectively, are determined; and to obtain the position of the device based at least in part on positions of the plurality of transmitters. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40)
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Specification