Johns Hopkins University

Link Labs, Inc.

Ricardo Luna

Mark Olden Bloechl

David A Kitchin

Patrick Li

Brian Emery Ray

Joseph E Sluz

Adrian Sapio

Juan C Juarez

Richard Kevin Sawyer, Jr

David M Brown

David W Young

Hala J Tomey

Radha A Venkat

Ryan P DiNello-Fass

Melissa E Jansen

Katherine T Souza

An optical communications beacon receiver including a camera for capturing a plurality of beacon images. The plurality of beacon images includes a beacon signal transmitted from a beacon transmitter. The beacon receiver also including processing circuitry configured for determining the state of the beacon signal for each of the plurality of beacon images based on the known pattern, at least one beacon image of the plurality of beacon images includes a beacon on state and at least one beacon image of the plurality of beacon images includes a beacon off state, comparing the at least one beacon image including the beacon on state to the at least one beacon image including the beacon off state, and determining a beacon location based on the comparison of the at least one beacon image including the beacon on state to the at least one beacon image including the beacon off state.

Free space optical communication

A method, of operating an end node to wirelessly communicate with a central node, includes: receiving wirelessly a current instance of a beacon signal periodically-transmitted from the central node; measuring a received power, P, of the beacon signal; reading locally-stored values of Pand G representing a presumed transmitted power of the beacon signal and a performance goal of the end node, respectively; determining, for a given channel, a path loss, PL, based on the Pand the P; and adaptively setting an energy level, E, of a forthcoming message to be transmitted from the end node based on PL and G.

Adaptive transmission energy consumption

Growing community of inventors

Columbia, MD, United States of America

Ricardo Luna