News Column

Researchers Submit Patent Application, "Active Waveform Shuttering for Rotorcraft", for Approval

August 6, 2014



By a News Reporter-Staff News Editor at Defense & Aerospace Week -- From Washington, D.C., VerticalNews journalists report that a patent application by the inventors Blanton, W. Brendan (Wilmington, DE); DuBois, Thomas A. (Media, PA), filed on January 17, 2013, was made available online on July 24, 2014.

The patent's assignee is The Boeing Company.

News editors obtained the following quote from the background information supplied by the inventors: "Various vehicles rely on rotors to provide propulsion and/or lift. Common examples include helicopters, quadrotors, and propeller-driven aircraft. Other examples include fan boats, also referred to as air boats. Such vehicle may be referred to generally as rotorcraft.

"Some rotorcraft may include RF communication systems. For example, most aircraft include both voice communication systems and data communication systems which rely on RF communication links to communication with one or more ground-based communication systems with other aircraft, or satellites. In some circumstances rotation of the rotors may introduce interference with RF signals transmitted from a rotorcraft. Such interference may vary as a function various parameters including the rotor speed, the aircraft orientation, transmission direction and the signal frequency. Accordingly, systems and methods mitigate such interference may find utility."

As a supplement to the background information on this patent application, VerticalNews correspondents also obtained the inventors' summary information for this patent application: "In one embodiment there is provided a method comprising determining a measure of interference resulting from a rotorblade, providing the measure of interference to a radiofrequency (RF) modulator, and shuttering an RF transmission signal from the RF transmitter in response to the measure of interference.

"In another embodiment there is provided a communication system comprising a radiofrequency (RF) transmitter, an antenna communicatively coupled to the RF transmitter to direct an RF signal in a first direction, a laser range finder mounted to the antenna to direct a pulsed laser signal in the first direction and receive reflected laser signals from a rotorblade, and logic to determine a measure of interference resulting from a rotorblade, provide the measure of interference to a radiofrequency (RF) transmitter, and shutter an RF transmission signal from the RF transmitter in response to the measure of interference.

"In another embodiment there is provided an aircraft comprising a communication system comprising a radiofrequency (RF) transmitter, an antenna communicatively coupled to the RF transmitter to direct an RF signal in a first direction, a laser ranger mounted to the antenna to direct a pulsed laser signal in the first direction and receive reflected laser signals from a rotorblade, and logic to determine a measure of interference resulting from a rotorblade, provide the measure of interference to a radiofrequency (RF) transmitter, and shutter an RF transmission signal from the RF transmitter in response to the measure of interference.

"The features, functions and advantages discussed herein can be achieved independently in various embodiments described herein or may be combined in yet other embodiments, further details of which can be seen with reference to the following description and drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

"The detailed description is described with reference to the accompanying figures.

"FIG. 1 is a schematic illustration of a system for active waveform modulation for rotorcraft, according to embodiments.

"FIG. 2 is a schematic illustration of a controller in which portions of a system for active waveform modulation for rotorcraft may be implemented according to embodiments.

"FIG. 3 is a flowchart illustrating operations in a method for active waveform modulation for rotorcraft, according to embodiments.

"FIGS. 4 and 5 are schematic illustrations of aircraft in which a system for active waveform modulation for rotorcraft may be implemented according to embodiments."

For additional information on this patent application, see: Blanton, W. Brendan; DuBois, Thomas A. Active Waveform Shuttering for Rotorcraft. Filed January 17, 2013 and posted July 24, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=1925&p=39&f=G&l=50&d=PG01&S1=20140717.PD.&OS=PD/20140717&RS=PD/20140717

Keywords for this news article include: The Boeing Company, Aerospace and Defense Companies.

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Source: Defense & Aerospace Week


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