Simulcasting OFDM system having mobile station location identification
First Claim
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1. A method for determining a location of a mobile station, comprising:
- receiving at the mobile station a plurality of simulcast signals having substantially identical information from a plurality of base stations;
determining relative time of arrival information for the plurality of simulcast signals that is received;
determining a position of the mobile station by the mobile station using an average of a channel impulse response obtained from an estimate of a channel frequency response; and
transmitting the position from the mobile station to one of the plurality of base stations.
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Abstract
A wireless simulcast system, such as an OFDM network, includes the ability to determine the location of a mobile user. Location-based services can be provided to the mobile user.
141 Citations
24 Claims
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1. A method for determining a location of a mobile station, comprising:
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receiving at the mobile station a plurality of simulcast signals having substantially identical information from a plurality of base stations; determining relative time of arrival information for the plurality of simulcast signals that is received; determining a position of the mobile station by the mobile station using an average of a channel impulse response obtained from an estimate of a channel frequency response; and transmitting the position from the mobile station to one of the plurality of base stations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for receiving location information for a mobile station at a base station, comprising:
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transmitting simulcast signals having substantially identical information to the mobile station; and receiving, at the base station, mobile station location information from the mobile station determined from relative time of arrival information for the simulcast signals, wherein the mobile station location information is determined by the mobile station using an average of a channel impulse response obtained from an estimate of a channel frequency response. - View Dependent Claims (17, 18)
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19. A mobile station, comprising:
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a receiver for receiving simulcast signals having substantially identical information from a plurality of base stations; a processor for determining time of arrival information for the simulcast signals that are received and identifying a location of the mobile station using an average of a channel impulse response obtained from an estimate of a channel frequency response; and a transmitter for transmitting the location to one of the plurality of base stations. - View Dependent Claims (20)
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21. A wireless network for providing location specific information, comprising:
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a mobile station for receiving simulcast signals and determining a location of the mobile station using an average of a channel impulse response obtained from an estimate of a channel frequency response; and a plurality of base stations for transmitting the simulcast signals having substantially identical information and receiving the location of the mobile station transmitted from the mobile station. - View Dependent Claims (22, 23)
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24. A wireless network, comprising:
a plurality of base stations for transmitting simulcast signals having substantially identical information to mobile stations and receiving mobile station location information derived by the mobile stations using an average of a channel impulse response obtained from an estimate of a channel frequency response to broadcast location specific information to the mobile stations.
Specification