System and method for channel feedback for location time of flight

Abstract

A method and system for time-of-flight (ToF) positioning in an IEEE 802.11 network comprises a responder station to transmit samples of preambles as the preambles are received. The samples represent channel information. The preambles comprise extension high-throughput long training fields (HT-LTFs). An initiator station is arranged to perform a time-of-arrival calculation based at least in part on an analysis of the channel information.

What is claimed is: 
     
         1 . A method for time-of-flight (ToF) positioning in a wireless network, the method comprising:
 transmitting a request frame over a channel from an initiator to a responder;   receiving a response frame from the responder, the response frame comprising a feedback symbol sampled from the request frame and not processed by the responder; and   determining channel information of the channel from the initiator to the responder in response to the feedback symbol.