Antenna selection method for a wireless location system
First Claim
1. An antenna selection method for use in a wireless location system that determines the geographic location of a mobile wireless transmitter, the wireless location system 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 method comprising:
- 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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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. An antenna selection method for use in a wireless location system that determines the geographic location of a mobile wireless transmitter, the wireless location system 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 method comprising:
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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. - View Dependent Claims (2, 3, 4)
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5. An antenna selection method for use in a wireless location system that determines the geographic location of a mobile wireless transmitter, the wireless location system including 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 method comprising:
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a) receiving a transmission from the wireless transmitter at multiple antennas and at multiple signal collection systems in the wireless location system;
b) converting the transmission into a digital format in a receiver connected to each antenna;
c) storing the digital data in a memory in each signal collection system;
d) determining the channel on which the transmission occurred and a cell site and sector serving the wireless transmitter;
e) designating one signal collection system as a primary signal collection system for processing the transmission;
f) determining a timestamp associated with the received data at the primary signal collection system;
g) determining a candidate list of signal collection systems and antennas to examine for use in location processing;
h) for each candidate signal collection system/antenna, evaluating parameters of the data in the channel of the transmission and at the time of the determined timestamp;
i) 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
j) 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. An antenna port selection method for use in 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 method comprising:
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selecting segments of data collected from a plurality of antenna ports at a candidate signal collection system, wherein the candidate signal collection system receives transmissions from multiple antennas via corresponding antenna ports;
selecting one of said antenna ports as a best port; and
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