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 remote location server, wherein;
corresponding transmit diversity configurations are determined by said remote 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; and
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 remote location server.
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Abstract
A mobile device receives signals from base stations each with multiple distributed transceivers. Each distributed transceiver may operate at different carrier frequencies. Each distributed transceiver is equipped with an independently configurable antenna array handling transmissions of the radio frequency signals to the mobile device. The mobile device generates channel measurements for the received signals, and subsequently receives a position estimate from a remote location server. The location server determines corresponding transmit diversity configurations applied to the base stations for conducting the channel measurements for the mobile device, and channel measurements at scanned locations in a location scanning region. The location server selects and utilize a signature function to calculate the position estimate for the mobile device over the transmit diversity configurations. A multi-level positioning process may be performed by adopting various signature functions, subsets of transmit configurations and/or subspaces of the location scanning region for accurate device positioning.
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Citations
20 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 remote location server, wherein; corresponding transmit diversity configurations are determined by said remote 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; and 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 remote location server. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. 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 remote location server, wherein; corresponding transmit diversity configurations are determined by said remote 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; and 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 remote location server. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
Specification