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 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.

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; andsaid 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.