Method and apparatus for identifying transmitters in a wireless communication system using power predictions
First Claim
1. A method for identifying transmitters in a wireless communication system, comprising:
- obtaining a plurality of received signals for a plurality of transmitters, wherein the plurality of received signals are received by a user terminal; and
determining a transmitter for each received signal bydetermining a measured power for the received signal,determining a list of a plurality of candidate transmitters for the received signal,obtaining predicted power for each candidate transmitter in the list, andidentifying the transmitter for the received signal based on predicted powers for the candidate transmitters and measured power for the received signal.
1 Assignment
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Accused Products
Abstract
Identification of transmitters for signals received by a terminal. To determine the transmitter of a given received signal, a list of candidate transmitters that may have transmitted that signal is determined. A coverage zone to use for the received signal is also determined. This coverage zone is the area where the terminal may receive the signal being identified. The predicted power for each candidate transmitter is then determined, e.g., using a path loss prediction model and the coverage zone. The predicted powers for the candidate transmitters are compared (directly or relatively) against the measured power of the received signal. The candidate transmitter with (direct/relative) predicted power closest to the (direct/relative) measured power is deemed as the one that transmitted the signal. Propagation delays may also be predicted and used for transmitter identification. The identified transmitters may be used to determine a position estimate for the terminal.
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Citations
26 Claims
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1. A method for identifying transmitters in a wireless communication system, comprising:
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obtaining a plurality of received signals for a plurality of transmitters, wherein the plurality of received signals are received by a user terminal; and determining a transmitter for each received signal by determining a measured power for the received signal, determining a list of a plurality of candidate transmitters for the received signal, obtaining predicted power for each candidate transmitter in the list, and identifying the transmitter for the received signal based on predicted powers for the candidate transmitters and measured power for the received signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for determining transmitters in a wireless communication system, comprising:
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obtaining a plurality of received signals for a plurality of transmitters, wherein the plurality of received signals are received by a user terminal; determining measured power for each of the plurality of received signals; and determining a transmitter for each received signal by determining a list of candidate transmitters for the received signal, determining an identified transmitter, determining measured power of the identified transmitter, obtaining predicted power for each candidate transmitter in the list, obtaining predicted power for the identified transmitter, determining the transmitter for the received signal based on predicted powers for the candidate transmitters, the predicted power for the identified transmitter, measured power of the received signal, and measured power for the identified transmitter. - View Dependent Claims (14, 15, 16, 17, 18)
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19. An apparatus operable to identify transmitters in a wireless communication system, comprising:
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means for obtaining a plurality of received signals for a plurality of transmitters, wherein the plurality of received signals are received by a user terminal; means for determining a plurality of lists of candidate transmitters for the plurality of received signals, one candidate list for each received signal; means for obtaining predicted power for each candidate transmitter; means for determining a measured power for each of the plurality of received signals; and means for identifying the transmitter for each received signal based on measured power for the received signal and predicted powers for the candidate transmitters in the list determined for the received signal. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
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Specification