Patent ID: 7693216
Filing Date: 2010-04-06
Classification: G01S,H03K,H04L

Abstract:
1. A method for communicating data from a transmitter to a receiver comprising the steps of: a) configuring the transmitter to periodically transmit a signal detectable by the receiver; b) determining a nominal transmission timing for said signal at the transmitter, and correspondingly determining the expected nominal receiving timing of said signal at the receiver; c) defining a set of symbols to be communicated, common to the transmitter and the receiver; d) defining an encoding table, common to the transmitter and the receiver, associating a unique time period with each of said symbols; e) encoding a specific symbol at the transmitter by modifying said signal nominal transmission timing, for one transmission, by the time period associated with this specific symbol; f) measuring at the receiver the time difference between the time of detection of said signal and the expected time of detection of said signal according to said nominal receiving timing; g) determining at the receiver the unique time period in said encoding table closest in value to said measured time difference; h) determining at the receiver the symbol in the encoding table associated with said closest in value unique time period, as the decoded symbol; wherein the nominal receiving timing is either: