Patents by Inventor Timothy E. Snodgrass

Timothy E. Snodgrass has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10116382
    Abstract: High frequency (HF) communication devices and methods capable of supporting HF tactical communications are disclosed. A communication device may include a time source configured to provide timing information for the communication device, where the timing information is synchronized with other communication devices participating in the same network the communication device is configured to participate in. The communication device may also include one or more processors in communication with the time source. The one or more processors may be configured to facilitate beyond line of sight reflective communications between the communication device and another communication device participating in the same network, wherein the beyond line of sight reflective communications are carried out in a time synchronized manner and in accordance with a time division multiple access (TDMA) based waveform that supports time slots.
    Type: Grant
    Filed: February 24, 2017
    Date of Patent: October 30, 2018
    Assignee: Rockwell Collins, Inc.
    Inventors: John Thommana, Timothy E. Snodgrass
  • Patent number: 9948383
    Abstract: A communication network includes and a communication method uses a communication node configured to use a time division multiple access protocol to allow communication in the network. The time division multiple access protocol is configured to allocate time slots. The communication node includes a main transceiver and an auxiliary transceiver. The communication node is configured to listen for a synchronization signal using the main transceiver during a first window and to listen for a synchronization signal during a second window using the auxiliary transceiver.
    Type: Grant
    Filed: August 8, 2016
    Date of Patent: April 17, 2018
    Assignee: ROCKWELL COLLINS, INC.
    Inventors: John Thommana, Timothy E. Snodgrass
  • Patent number: 9693330
    Abstract: Timing interrogation methods and communication devices utilizing such timing interrogation methods are disclosed. The timing interrogation method may include: sending a round-trip timing interrogation preamble from a first radio node to a second radio node via the ionosphere; receiving a round-trip timing response at the first radio node via the ionosphere from the second radio node; receiving a time of arrival record at the first radio node via the ionosphere from the second radio node, wherein the time of arrival record indicates the time of arrival of the round-trip timing interrogation preamble at the second radio node according to timing information maintained by the second radio node; calculating timing information based on the time of arrival record and a propagation time of the round-trip timing interrogation preamble and the round-trip timing response; and adjusting time information maintained by the first radio node according to the calculated timing information.
    Type: Grant
    Filed: July 30, 2015
    Date of Patent: June 27, 2017
    Assignee: Rockwell Collins, Inc.
    Inventors: Timothy E. Snodgrass, Randy W. Nelson
  • Patent number: 9621208
    Abstract: A communication system periodically changes the carrier wave frequency or phase such that a signal traveling a reflected path no longer destructively interferes with a signal traveling a direct line-of-sight path. The communication system negotiates a periodic frequency or phase shift with a receiver, and then shifts the frequency or phase according to the negotiated schedule to maintain continuous communication.
    Type: Grant
    Filed: March 9, 2015
    Date of Patent: April 11, 2017
    Assignee: Rockwell Collins, Inc.
    Inventors: Timothy E. Snodgrass, James A. Stevens
  • Patent number: 9282500
    Abstract: A system and method for ad-hoc beyond line of sight high frequency (HF) radio frequency communication is disclosed. Embodiments of the present invention may augment the HF waveform incorporated with Advanced automatic link establishment (A2LE) to determine relay-hop paths between a plurality of HF nodes. Systems herein may setup and teardown bi-directional one hop HF communication sessions between two HF nodes having RF connectivity directly as well as through an intermediary relay node. Additionally, the setup and teardown may include bi-directional relay hop HF communication sessions between two HF nodes through multiple intermediary relay nodes. In performing the bi-directional relay hop HF communication sessions, systems herein may select a relay node, perform automatic link monitoring and link re-establishment, support message store and forward, and route HF communication along a path around potential barriers to communication (e.g., nuclear scintillation, solar flares, and coronal mass events).
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: March 8, 2016
    Assignee: Rockwell Collins, Inc.
    Inventors: John Thommana, Timothy E. Snodgrass, Randy W. Nelson, Lizy Paul, Dwayne E. Harris
  • Patent number: 9118437
    Abstract: The present invention includes providing a multidirectional antenna unit including a plurality of directional antenna elements configured to spatially segment an operational theatre into a plurality of segmented regions, receiving radio frequency signals via the plurality of directional antenna elements from the plurality of segmented region, identifying a directional antenna element having the highest signal-to-jamming ratio, and connecting the directional antenna element having the highest signal-to-jamming ratio to a multifunction information distribution system terminal.
    Type: Grant
    Filed: May 22, 2013
    Date of Patent: August 25, 2015
    Assignee: Rockwell Collins, Inc.
    Inventors: Timothy E. Snodgrass, Eric O. Zuber, Dennis L. Hoffman
  • Patent number: 9059768
    Abstract: An interference cancellation system supports a dynamic operating range from maximum interfering signal level to the on-channel noise floor. The system uses a novel combination of analog and digital processing effectively cancelling 1) high-level interfering signal components, 2) low-level interfering noise, and 3) distortion components. The system employs an interrelated combination of cross-domain analog and digital processing techniques to defeat the inherent dynamic range limitations existing in either individual domain.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: June 16, 2015
    Assignee: Rockwell Collins, Inc.
    Inventors: William B. Sorsby, Timothy E. Snodgrass, James A. Stevens
  • Patent number: 8692705
    Abstract: Present novel and non-trivial apparatus and method for generating low latency position information from position signals transmitted in a narrow bandwidth channel of a radio frequency are disclosed. An aircraft (i.e., ownship) and each target (e.g., aircraft) of a time-division multiple access (“TDMA”) network receives its respective position derived from its individual source such as a satellite navigation system. A processing module of a communication device installed in ownship and each target generate position signals, and during the allocated time slots of an interface protocol, exchange position information with the others in the network over a narrow bandwidth channel (e.g., bandwidths of 25 KHz or less) of a radio frequency in the VHF range or lower UHF range. The interface protocol may also be comprised of a voice contention time slot for the transmission of messages and an order wire for the administration of the network.
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: April 8, 2014
    Assignee: Rockwell Collins, Inc.
    Inventors: Paul N. Smith, Timothy E. Snodgrass
  • Patent number: 8422381
    Abstract: A system for improving jamming resistance comprising a first node suitable for transmitting a coded packet and a second node suitable for receiving the coded packet. The first node generates a plurality of coded preamble packets and transmits the plurality of coded preamble packets to the second node on a plurality of frequency channels, the second node receives the plurality of coded preamble packets, determines a relative strength for each of the plurality of frequency channels based on a frequency channel condition determined from the transmission of the plurality of coded preamble packets and transmits a frequency channel response to the first node.
    Type: Grant
    Filed: February 12, 2007
    Date of Patent: April 16, 2013
    Assignee: Rockwell Collins, Inc.
    Inventor: Timothy E. Snodgrass
  • Publication number: 20130069815
    Abstract: Present novel and non-trivial apparatus and method for generating low latency position information from position signals transmitted in a narrow bandwidth channel of a radio frequency are disclosed. An aircraft (i.e., ownship) and each target (e.g., aircraft) of a time-division multiple access (“TDMA”) network receives its respective position derived from its individual source such as a satellite navigation system. A processing module of a communication device installed in ownship and each target generate position signals, and during the allocated time slots of an interface protocol, exchange position information with the others in the network over a narrow bandwidth channel (e.g., bandwidths of 25 KHz or less) of a radio frequency in the VHF range or lower UHF range. The interface protocol may also be comprised of a voice contention time slot for the transmission of messages and an order wire for the administration of the network.
    Type: Application
    Filed: September 21, 2011
    Publication date: March 21, 2013
    Applicant: Rockwell Collins, Inc.
    Inventors: Paul N. Smith, Timothy E. Snodgrass
  • Patent number: 8391416
    Abstract: A system may include a receiver having a number of reception channels spread across an instantaneous radio frequency bandwidth, each one of the reception channels for receiving a different radio frequency within the instantaneous radio frequency bandwidth. The system may also include control programming for positioning the receiver on one of a number of synchronization frequencies transmitting a synchronization preamble, where a number of reception channels is less than a number of synchronization frequencies, and a probability of not receiving one or more of the synchronization frequencies is smaller than a required message error rate for receiving the plurality of synchronization frequencies.
    Type: Grant
    Filed: August 5, 2009
    Date of Patent: March 5, 2013
    Assignee: Rockwell Collins, Inc.
    Inventors: Timothy E. Snodgrass, Dennis L. Hoffman
  • Patent number: 8139624
    Abstract: A node for communicating with multiple ad hoc communication networks includes a first antenna configured to communicate in a first frequency band associated with a first ad hoc communication network and a second antenna configured to communicate in a second frequency band associated with a second ad hoc communication network. A transceiver is coupled to the first antenna and the second antenna. The transceiver is configured to transmit and receive messages. A control circuit is coupled to the transceiver and is configured to implement an access protocol having a time slot section. The access protocol is configured to switch communications in the time slot section between the first frequency band and the second frequency band.
    Type: Grant
    Filed: August 25, 2005
    Date of Patent: March 20, 2012
    Assignee: Rockwell Collins, Inc.
    Inventor: Timothy E. Snodgrass
  • Patent number: 8009605
    Abstract: A device reconfigurable to support communication using different communication technologies is provided. The device includes, but is not limited to, a plurality of communication processing modules and a switching interface. The switching interface couples to the plurality of communication processing modules. An instruction set is written into the device to select one or more communication processing module of the plurality of communication processing modules to connect using the switching interface. One or more of the communication processing modules may be programmable. The instruction set may include programmable parameters and/or programming instructions for the one or more programmable communication processing modules. As a result, the device is reprogrammable and reconfigurable to process different communication signals while utilizing less power than conventional designs.
    Type: Grant
    Filed: August 8, 2005
    Date of Patent: August 30, 2011
    Assignee: Rockwell Collins, Inc.
    Inventor: Timothy E. Snodgrass
  • Patent number: 7969919
    Abstract: A method for sharing thermal load between nodes in a communication network includes monitoring the thermal load of a first node in the communication network. The first node is an advantaged node. When the thermal load of the first node is a predetermined value, a second node is selected as an advantaged node. A notification message is transmitted to the plurality of nodes in the communication network identifying the second node as an advantaged node for at least a subset of message traffic of the first node.
    Type: Grant
    Filed: August 8, 2005
    Date of Patent: June 28, 2011
    Assignee: Rockwell Collins, Inc.
    Inventor: Timothy E. Snodgrass
  • Patent number: 7843988
    Abstract: A system for pre-processing transmission sequences in a jammed environment. System a transmitter suitable for transmitting the synchronization preamble further comprising a pseudo noise generator suitable for running a non predictable pseudo random algorithm. Pseudo random algorithm is suitable for generating a codeword operable as a pointer indexed into a table of gold sequences. Pointer is suitable for selecting a pseudo random selection of gold sequences from the table of gold sequences. Pseudo random selection of gold sequences forms a synchronization preamble. Gold sequences are concatenated together to form the synchronization preamble. System further comprises a receiver configured to receive the transmitted synchronization preamble further comprising of a decryption key suitable for decrypting received synchronization preamble.
    Type: Grant
    Filed: September 21, 2006
    Date of Patent: November 30, 2010
    Assignee: Rockwell Collins, Inc.
    Inventor: Timothy E. Snodgrass
  • Patent number: 7844304
    Abstract: A power supply for a communications device, including a controllable regulator that varies power drawn from a power input according to communications requirements of the communications device. The controllable regulator increases power drawn from the power input immediately before an increase of power is required by the communications device when a magnitude of a rate of change of required power exceeds a predetermined level. An active filter is connected to an output of the controllable regulator. The active filter is controlled to variably divert power that is output from the controllable regulator in excess of what is required by the communications device, wherein electromagnetic emissions resulting from the rate of change of power are reduced.
    Type: Grant
    Filed: October 27, 2005
    Date of Patent: November 30, 2010
    Assignee: Rockwell Collins, Inc.
    Inventor: Timothy E. Snodgrass
  • Patent number: 7639708
    Abstract: A method for reallocating bandwidth includes assigning a node to a position message slot, running an allocation algorithm, generating a table based on the allocation algorithm, selecting a row of the table, aligning a value of the row with a node identifier; and assigning the node to a mini-slot within the position message slot based on the aligning of the value of the row and the node identifier.
    Type: Grant
    Filed: February 5, 2007
    Date of Patent: December 29, 2009
    Assignee: Rockwell Collins, Inc.
    Inventors: Timothy E. Snodgrass, Jeffrey D. Bouis, Alan D. Amis, Fred D. Mabe
  • Patent number: 7609753
    Abstract: A Link 16 radio receiving system includes a first antenna, a second antenna, a combiner and a rake receiver. The combiner is coupled to the first antenna and the second antenna. The combiner provides a combined signal. The rake receiver is coupled to the combiner to receive the combined signal.
    Type: Grant
    Filed: September 13, 2005
    Date of Patent: October 27, 2009
    Assignee: Rockwell Collins, Inc.
    Inventor: Timothy E. Snodgrass
  • Patent number: 7530074
    Abstract: A joint tactical radio system (JTRS) software computer architecture (SCA) apparatus that implements services for a waveform application by reducing latency in middleware and the operating system such that more power efficient processors can be used. The apparatus includes an object request broker that marshals data from the waveform application for communication and an object request broker interface that communicates the marshaled data using a memory pool and select functions of an Operating System. At least a portion of the object request broker is implemented in hardware and at least a portion of the object request broker interface is implemented in hardware and at least a portion of the Operating System is implemented in hardware.
    Type: Grant
    Filed: February 27, 2004
    Date of Patent: May 5, 2009
    Assignee: Rockwell Collins, Inc.
    Inventor: Timothy E. Snodgrass
  • Patent number: 7512103
    Abstract: A virtual channel communications system assigns RF resources to communications waveforms for transmitting and receiving signals. The communications system comprises universal transceivers for generating and processing the signals. The universal transceivers comprise translators for translating baseband transmit signals to RF transmit signals and RF receive signals to baseband receive signals and digital signal processors for generating the communications waveforms and processing baseband receive and transmit signals. An inter-transceiver communications bus connected to the translators and the digital signal processors communicates between the universal transceivers. The communications bus interconnects digital signal processors in any universal transceiver to a translator in any universal transceiver. Universal power amplifiers are connected to the universal transceivers to amplify the RF transmit signals.
    Type: Grant
    Filed: June 19, 2003
    Date of Patent: March 31, 2009
    Assignee: Rockwell Collins, In.c
    Inventor: Timothy E. Snodgrass