Patent 7403746 was granted and assigned to Mitsubishi Electric Research Laboratories on July, 2008 by the United States Patent and Trademark Office.
A method determines a duration of a frame in an impulse radio system for radio ranging. Channel state information of a channel between two transceivers is estimated periodically. A signal to noise and interference ratio is also estimated periodically. The frame duration of the frame is then determined according to the channel state information and the signal to noise and interference ratio.