Antenna selection method for a wireless location system
First Claim
1. A wireless location system that determines the geographic location of a mobile wireless transmitter, including signal collection systems connected to multiple antennas at a plurality of cell sites and a location processor for processing digital data provided by the signal collection systems, the wireless location system comprising:
- a first software mechanism for evaluating segments of data collected from a plurality of antennas at a signal collection system;
a second software mechanism for selecting a subset of the segments of data; and
a third software mechanism for using the selected segments of data in location processing.
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Abstract
An antenna selection method is used in a wireless location system that determines the geographic location of a mobile wireless transmitter. The wireless location system includes signal collection systems connected to multiple antennas at a plurality of cell sites and a location processor for processing digital data provided by the signal collection systems. The antenna selection method comprises evaluating segments of data collected from a plurality of antennas at a signal collection system, selecting a subset of the segments of data, and using only the selected segments of data in location processing.
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Citations
45 Claims
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1. A wireless location system that determines the geographic location of a mobile wireless transmitter, including signal collection systems connected to multiple antennas at a plurality of cell sites and a location processor for processing digital data provided by the signal collection systems, the wireless location system comprising:
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a first software mechanism for evaluating segments of data collected from a plurality of antennas at a signal collection system;
a second software mechanism for selecting a subset of the segments of data; and
a third software mechanism for using the selected segments of data in location processing. - View Dependent Claims (2, 3, 4)
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5. A wireless location system that determines the geographic location of a mobile wireless transmitter, the wireless location system including a plurality of signal collection systems located within the geography of a wireless communications system and having multiple antennas, and a location processor for processing digital data provided by the signal collection systems, the signal collection systems comprising:
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means for receiving a transmission from the wireless transmitter at multiple antennas;
means for converting the transmission into a digital format in a receiver connected to each antenna;
means for storing the digital data in a memory in each signal collection system;
and the wireless location system further comprising;
means for determining the channel on which a given transmission occurred and a cell site and sector serving the wireless transmitter responsible for the given transmission;
means for designating one signal collection system as a primary signal collection system for processing the transmission;
means for determining a candidate list of signal collection systems and antennas to examine for use in location processing;
means for evaluating parameters of the data in the channel of the transmission and at the time of a timestamp associated with the transmission;
means for rank ordering the candidate signal collection system/antennas using specified criteria and creating a subset list of signal collection system/antennas to use in the location processing; and
means for proceeding with location processing using data only from the subset list of signal collection system/antennas. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. A wireless location system that determines the geographic location of a mobile wireless transmitter, the wireless location system including signal collection systems having multiple antennas and a location processor for processing digital data provided by the signal collection systems, the wireless location system further comprising:
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means for selecting segments of data collected from a plurality of antenna ports at a candidate signal collection system receiving transmissions from multiple antennas via corresponding antenna ports;
means for selecting one of said antenna ports as a best port; and
means for using the segments of data from the best antenna port in location processing. - View Dependent Claims (41, 42, 43, 44, 45)
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Specification