Patent ID: 9210682
Filing Date: 2015-12-08
Classification: G01S,H04W

Abstract:
1. A method comprising: controllably modifying, at a first wireless device, an original value of at least one PHY-layer signal parameter for a signal according to at least one pre-determined varying signal modification process, the at least one PHY-layer signal parameter comprising: amplitude, frequency, timestamp, gain, signal equalization, or any combination thereof; and transmitting, to a second wireless device, the signal with a controllably modified value of the at least one PHY-layer signal parameter, wherein the transmitted signal is configured to facilitate position determination of the second wireless device, at the second wireless device, based at least in part upon the original value of the at least one PHY-layer signal parameter; wherein the original value of the at least one PHY-layer signal parameter is determined at the second wireless device from the controllably modified value of the at least one PHY-layer signal parameter by applying, at the second wireless device, at least one inverse process of the at least one pre-determined varying signal modification process to the signal with the controllably modified value of the at least one PHY-layer signal parameter in order to recover, at the second wireless device, the original value of the at least one PHY-layer signal parameter, and performing, at the second wireless device, location determination operations based, at least in part, on the original value of the at least one PHY-layer signal parameter recovered at the second wireless device through application of the at least one inverse process to the controllably modified value of the at least one PHY-layer signal parameter.