Method and system for device positioning utilizing distributed transceivers with array processing

摘要

A mobile device receives RF signals from base stations in a location scanning region. Each of the base stations 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 independently configurable antenna array for the distributed transceivers in the location scanning region, to transmit the RF signals. The RLS determines a coarse position estimate for the mobile device for the sub-regions within the location scanning region and applies different signature functions to the determined coarse position estimate for the sub-regions to generate corresponding sub-regions position estimates. The RLS determines a position estimate for the mobile device based on the sub-regions position estimates and communicates the position estimate to the mobile device.

主权项

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; andeach 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; andreceiving 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;at least one of (i) a subset of said corresponding transmit diversity configurations and (ii) a subspace of said location scanning region is selected by said location server based on said resolution of said signature function over said scanned locations in said location scanning region; andsaid signature function is utilized by said location server to calculate said updated position estimate for said mobile device over at least one of (i) said subset of said corresponding transmit diversity configurations and (ii) said subspace of said location scanning region.