System and method for measuring and locating a mobile station signal in a wireless communication system
First Claim
1. A method of measuring transmission of transmitter within a communication system, the method comprising the steps of:
- collecting a first set of one or more signal features of a first transmitter signal received at a first receiver;
forwarding said first set of signal features to a second receiver;
creating a replica of said first transmitter signal at said second receiver in response to said first set of signal features;
correlating said replica with a second transmitter signal received at said second receiver; and
determining a second set of one or more signal features for said second transmitter signal as received at said second receiver.
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Accused Products
Abstract
A communication system comprises a reference base station which collects one or more signal features of a mobile station signal. The reference base station determines a first location parameter of the mobile station signal it receives. The reference base station forwards the signal features to an auxiliary base station. Using the signal features, the auxiliary base station creates a replica of the mobile station signal as transmitted by the mobile station. The auxiliary base station correlates the replica with a same mobile station signal as received at the auxiliary base station in order to determine a second set of signal features. The auxiliary base station uses the second set of signal features to determine a second location parameter. The position of the mobile station is determined using the first and second location parameters. The process may be repeated at a plurality of auxiliary base stations and for a plurality of different location parameters in order to improve the accuracy of the determination of mobile station location.
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Citations
9 Claims
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1. A method of measuring transmission of transmitter within a communication system, the method comprising the steps of:
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collecting a first set of one or more signal features of a first transmitter signal received at a first receiver;
forwarding said first set of signal features to a second receiver;
creating a replica of said first transmitter signal at said second receiver in response to said first set of signal features;
correlating said replica with a second transmitter signal received at said second receiver; and
determining a second set of one or more signal features for said second transmitter signal as received at said second receiver. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus for measuring a mobile station transmission within a communication system comprising:
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means for collecting a first set of one or more signal features of a first mobile station signal received at a reference base station;
means for forwarding said first set of signal features to an auxiliary base station;
means for creating a replica of said first mobile station signal at said auxiliary base station in response to said first set of signal features;
means for correlating said replica with a second mobile station signal received at said auxiliary base station in order to determine a second set of one or more signal features for said mobile station signal as received at said auxiliary base station;
means responsive to said first set of signal features for determining a first location parameter of said first mobile station signal;
means responsive to said second set of signal features for determining a second location parameter of said second mobile station signal; and
means for estimating a position of said mobile station in response to said first and second location parameters. - View Dependent Claims (7)
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8. A method of determining the location of a mobile station within a communication system comprising the steps of:
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collecting a first set of one or more signal features of a first mobile station signal received at a reference base station;
forwarding said first set of signal features to an auxiliary base station;
searching for a second mobile station signal received at said auxiliary base station in order to determine a second set of one or more signal features for said mobile station signal as received at said auxiliary base station, wherein a range over which said searching occurs is limited in response to said first set of signal features;
determining a first location parameter of said first mobile station signal;
determining a second location parameter of said second mobile station signal in response to said second set of signal features; and
estimating a position of said mobile station in response to said first and second location parameters.
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9. In a system in which a remote unit communicates with a servicing base station, an auxiliary base station comprising:
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a sample storage module for storing a set of samples of a mobile station signal;
a replica generation module for creating a replica of said mobile station signal in response to a first set of one or more signal features received from said servicing base station;
a correlation module coupled to said sample storage module and to said replica generation module, creating a second set of one or more signal features for said mobile station signal as received at said auxiliary base station; and
a location parameter generation module coupled to said correlation module for generating location parameters of said mobile station in response to said second set of signal features.
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Specification