Method and system for device positioning utilizing distributed transceivers with array processing
First Claim
1. A method of processing signals, the method comprising:
- in a mobile device;
receiving radio frequency signals from one or more base stations, wherein;
each of said one or more base stations comprises a plurality of distributed transceivers; and
each of said plurality of distributed transceivers comprises an independently configurable antenna array for transmitting said radio frequency signals to said mobile device;
generating channel measurements for said received radio frequency signals; and
receiving a position estimate for said mobile device from a location server, wherein;
corresponding transmit diversity configurations are determined by said location server, said corresponding transmit diversity configurations being applied to said one or more base stations for both said channel measurements for said mobile device and channel measurements at scanned locations in a location scanning region;
said position estimate for said mobile device over said location scanning region utilizing said channel measurements for said mobile device, said channel measurements at said scanned locations, and said corresponding transmit diversity configurations are calculated by said location server;
a signature function for said channel measurements for said mobile device, and said channel measurements at said scanned locations over said corresponding transmit diversity configurations, are selected by said location server;
said signature function is utilized by said location server to determine said position estimate for said mobile device over said corresponding transmit diversity configurations;
said position estimate for said mobile device is updated by said location server based on a resolution of said signature function over said scanned locations in said location scanning region; and
said updated position estimate for said mobile device is calculated by said location server, by utilizing a different signature function for each of said channel measurements for said mobile device and said channel measurements with said scanned locations over said corresponding transmit diversity configurations.
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Abstract
A mobile device receives RF signals from base stations in a location scanning region. Each base station includes a plurality of distributed transceivers and each distributed transceiver includes an independently configurable antenna array. The mobile device generates and communicates channel measurements for the received radio frequency signals to a remote location server (RLS). The RLS configures, utilizing one or more channel transmit settings, the antenna array for the distributed transceivers to transmit the RF signals. The remote location server selects a subset of the communicated channel measurements for determining a position estimate for the mobile device having a desired resolution. The mobile device may receive the determined position estimate from the remote location server. The location scanning region may be determined based on GPS and/or WLAN positioning. The remote location server generates the channel transmit settings and determines the location scanning region in which the mobile device is located.
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Citations
40 Claims
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1. A method of processing signals, the method comprising:
in a mobile device; receiving radio frequency signals from one or more base stations, wherein; each of said one or more base stations comprises a plurality of distributed transceivers; and each of said plurality of distributed transceivers comprises an independently configurable antenna array for transmitting said radio frequency signals to said mobile device; generating channel measurements for said received radio frequency signals; and receiving a position estimate for said mobile device from a location server, wherein; corresponding transmit diversity configurations are determined by said location server, said corresponding transmit diversity configurations being applied to said one or more base stations for both said channel measurements for said mobile device and channel measurements at scanned locations in a location scanning region; said position estimate for said mobile device over said location scanning region utilizing said channel measurements for said mobile device, said channel measurements at said scanned locations, and said corresponding transmit diversity configurations are calculated by said location server; a signature function for said channel measurements for said mobile device, and said channel measurements at said scanned locations over said corresponding transmit diversity configurations, are selected by said location server; said signature function is utilized by said location server to determine said position estimate for said mobile device over said corresponding transmit diversity configurations; said position estimate for said mobile device is updated by said location server based on a resolution of said signature function over said scanned locations in said location scanning region; and said updated position estimate for said mobile device is calculated by said location server, by utilizing a different signature function for each of said channel measurements for said mobile device and said channel measurements with said scanned locations over said corresponding transmit diversity configurations. - View Dependent Claims (2, 3, 29, 30, 31)
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4. A system for processing signals, the system comprising:
a mobile device, said mobile device being operable to; receive radio frequency signals from one or more base stations, wherein; each of said one or more base stations comprises a plurality of distributed transceivers; and each of said plurality of distributed transceivers comprises an independently configurable antenna array for transmitting said radio frequency signals to said mobile device; determine channel characteristics for said received radio frequency signals; generate channel measurements for said received radio frequency signals; and receive a position estimate for said mobile device from a location server, wherein; corresponding transmit diversity configurations are determined by said location server, said corresponding transmit diversity configurations being applied to said one or more base stations for both said channel measurements for said mobile device and channel measurements at scanned locations in a location scanning region; said position estimate for said mobile device over said location scanning region utilizing said channel measurements for said mobile device, said channel measurements at said scanned locations, and said corresponding transmit diversity configurations are calculated by said location server; a signature function for said channel measurements for said mobile device, and said channel measurements at said scanned locations over said corresponding transmit diversity configurations, are selected by said location server; said signature function is utilized by said location server to determine said position estimate for said mobile device over said corresponding transmit diversity configurations; said position estimate for said mobile device is updated by said location server based on a resolution of said signature function over said scanned locations in said location scanning region; and said updated position estimate for said mobile device is calculated by said location server, by utilizing a different signature function for each of said channel measurements for said mobile device and said channel measurements with said scanned locations over said corresponding transmit diversity configurations. - View Dependent Claims (5, 6, 32, 33, 34)
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7. A method for processing signals, the method comprising:
in a mobile device; receiving radio frequency signals from one or more base stations in a location scanning region, wherein; each of said one or more base stations comprises a plurality of distributed transceivers; and each of said plurality of distributed transceivers comprises an independently configurable antenna array for transmitting said radio frequency signals to said mobile device; generating channel measurements for said received radio frequency signals; communicating said generated channel measurements to a location server, wherein said location server; configures said independently configurable antenna array for said plurality of distributed transceivers in said one or more base stations in said location scanning region to transmit said radio frequency signals utilizing one or more channel transmit settings; and selects a subset of said communicated channel measurements for determining a position estimate for said mobile device having a desired resolution; and receiving said position estimate for said mobile device from said location server. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 35, 36, 37)
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18. A system for processing signals, the system comprising:
a mobile device, said mobile device being operable to; receive radio frequency signals from one or more base stations in a location scanning region, wherein; each of said one or more base stations comprises a plurality of distributed transceivers; and each of said plurality of distributed transceivers comprises an independently configurable antenna array for transmitting said radio frequency signals to said mobile device; generate channel measurements for said received radio frequency signals; communicate said generated channel measurements to a location server, wherein said location server; configures said independently configurable antenna array for said plurality of distributed transceivers in said one or more base stations in said location scanning region to transmit said radio frequency signals utilizing one or more channel transmit settings; and selects a subset of said communicated channel measurements for determining a position estimate for said mobile device having a desired resolution; and receive said position estimate for said mobile device from said location server. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 38, 39, 40)
Specification