Patents by Inventor Mark Hsu

Mark Hsu 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).

  • Publication number: 20170093475
    Abstract: In examples, two arrays of Radio Frequency nodes achieve enhanced beamforming for communications between the arrays by successively sending sounding signals from one array to the other array. Each sounding signal sent by the first of the two arrays is beamformed through time reversal of an immediately preceding sounding signal received by the first array from the second array, and each sounding signal (except the initial sounding signal) sent by the second array is beamformed through time reversal of an immediately preceding sounding signal received by the second array from the first array. The initial sounding signal sent by the second array may be omnidirectional, beamformed through a guesstimate, random, predetermined, or determined through a search of the area where the arrays are located. With sufficient beamfocusing, the arrays may communicate by sending and receiving data from one array to the other array.
    Type: Application
    Filed: September 27, 2016
    Publication date: March 30, 2017
    Inventors: David SMITH, Mark HSU, Maha ACHOUR, Jeremy RODE, Anis HUSAIN
  • Publication number: 20170086160
    Abstract: Distributed cooperating nodes of a cluster are used for communications, object location, and other purposes. The nodes can move relative to each other and an intended receiver. The nodes are synchronized and data for transmission from the cluster is distributed to the nodes. The intended receiver sends a sounding signal to the nodes. Each node receives the sounding signal, obtains the channel response between the intended receiver and the node, and time-reverses the channel response. Each node convolves its time-reversed channel response with the data to obtain the node's convolved data. A master node sends a time reference signal to the other nodes. Each node waits a predetermined time following the time reference signal, as determined based on a common time reference. At the expiration of the predetermined time period, the nodes simultaneously transmit their convolved data. The transmissions from the nodes combine coherently in time-space at the intended receiver.
    Type: Application
    Filed: September 29, 2016
    Publication date: March 23, 2017
    Inventors: David SMITH, Maha ACHOUR, Jeremy RODE, Anis HUSAIN, Mark HSU
  • Publication number: 20170026147
    Abstract: In examples, Radio Frequency Iterative Time-Reversal (RF-ITR) and singular value decomposition (SVD) are used by an array of nodes to characterize environment by identifying scatterer objects. The array may be ad hoc dynamic or stationary. The environment is cancelled from the RF-ITR by adjusting Time-Reversal (TR) prefilters, reducing illumination of the scatterer objects in the environment. This enables the RF-ITR process to focus on a moving target, which can then be sensed (discovered, identified, monitoring, tracked, and/or imaged). The moving target on which the RF-ITR process focuses may then be cancelled from the RF-ITR in the same way as the environment, allowing the RF-ITR to focus on another target. Multiple moving targets can thus be sensed. Defensive measures such as jamming may then be taken against the targets. ii The targets may be distinguished from the scatterer objects in the environment through differential, Doppler processing, and other classification techniques.
    Type: Application
    Filed: July 22, 2016
    Publication date: January 26, 2017
    Applicant: Ziva Corporation
    Inventors: David SMITH, Jeremy RODE, Anis HUSAIN, Mark HSU, Maha ACHOUR
  • Patent number: 9548799
    Abstract: Dynamic, untethered array nodes are frequency, phase, and time aligned, and used to focus their transmissions of the same data coherently on a target, using time reversal. Alignment may be achieved separately for the radio frequency (RF) carriers and the data envelopes. Carrier alignment may be by phase conjugation. The data is distributed across the nodes. Data distribution and/or alignment may be performed by a Master node of the array. The nodes capture a sounding signal from the target, in the same time window. Each node converts the captured sounding signal to baseband, for example, using in-phase/quadrature downconversion. Each node stores the baseband samples of the sounding pulse. Each node convolves time-reversed samples of the sounding signal with the data, and upconverts the convolved data to radio frequency. The nodes emit their respective convolved and upconverted data so that the emissions focus coherently at the target.
    Type: Grant
    Filed: April 7, 2014
    Date of Patent: January 17, 2017
    Assignee: ZIV A CORP.
    Inventors: Mark Hsu, David Smith, Jeremy Rode, Anis Husain
  • Patent number: 9497722
    Abstract: Methods and systems for coherent distributed communication techniques using time reversal are disclosed. In one aspect, cooperating nodes of a cluster can move relative to each other and relative to an intended receiver of the nodes' data transmissions. The nodes are synchronized to a common time reference, and data for transmission from the cluster is distributed to the nodes. The intended receiver sends a sounding signal to the nodes. Each node receives the sounding signal, obtains the channel response between the intended receiver and itself, and time-reverses the channel response. Each node then convolves its time-reversed channel response with the data to obtain the node's convolved data. Each node waits a predetermined time following the time reference signal, as determined based on the common time reference. At the expiration of the predetermined time period, the nodes simultaneously transmit their convolved data.
    Type: Grant
    Filed: May 2, 2012
    Date of Patent: November 15, 2016
    Assignee: ZIVA CORP.
    Inventors: Anis Husain, Jeremy Rode, David Smith, Mark Hsu, Maha Achour
  • Publication number: 20160047894
    Abstract: Methods, apparatus, and articles of manufacture make Geolocation of a source transmitter more difficult or impossible. Scatterers common to a source transmitter and an intended receiver are identified using a variety of techniques, such as iterative time reversal (ITR) and Singular Value Decomposition (SVD) of a scatter matrix. The source transmitter then uses time reversal and knowledge of the signatures of the scatterers to focus its transmissions on one or more of the scatterers, instead of the intended receiver. The source transmitter may have multiple antennas or antenna elements. The source transmitter and/or the intended receiver may include antenna elements with Near-Field Scatterers to enable spatial focusing below the diffraction limit at the frequencies of interest. The source transmitter may be a plurality of ad hoc nodes cooperating with each other.
    Type: Application
    Filed: October 27, 2015
    Publication date: February 18, 2016
    Applicant: ZIVA CORPORATION
    Inventors: Jeremy Rode, Maha Achour, David Smith, Anis Husain, Mark Hsu
  • Patent number: 9201132
    Abstract: Methods, apparatus, and articles of manufacture make Geolocation of a source transmitter more difficult or impossible. Scatterers common to a source transmitter and an intended receiver are identified using a variety of techniques, such as iterative time reversal (ITR) and Singular Value Decomposition (SVD) of a scatter matrix. The source transmitter then uses time reversal and knowledge of the signatures of the scatterers to focus its transmissions on one or more of the scatterers, instead of the intended receiver. The source transmitter may have multiple antennas or antenna elements. The source transmitter and/or the intended receiver may include antenna elements with Near-Field Scatterers to enable spatial focusing below the diffraction limit at the frequencies of interest. The source transmitter may be a plurality of ad hoc nodes cooperating with each other.
    Type: Grant
    Filed: May 2, 2012
    Date of Patent: December 1, 2015
    Assignee: ZIVA CORPORATION
    Inventors: Mark Hsu, David Smith, Jeremy Rode, Anis Husain, Maha Achour
  • Publication number: 20150173034
    Abstract: Dynamic, untethered array nodes with internal clocks are frequency, phase, and time aligned/synchronized, and used to focus their transmissions of the same payload data coherently on a target or in the target's direction, using time reversal or directional beamforming. Information for alignment/synchronization may be sent from a master node of the array to the slave nodes, over RF node-to-node links operating on different carrier or subcarrier frequencies. Additionally, the up- and down-communications on the RF links may use different frequencies. The RF links may also be used to distribute the payload data across the array. Because of frequency division on the RF links, interference is reduced or avoided, and the process of alignment/synchronization may be performed concurrently for several or all the slave nodes. The array may also operate collaboratively to receive data from the target.
    Type: Application
    Filed: September 23, 2014
    Publication date: June 18, 2015
    Applicant: ZIVA CORPORATION
    Inventors: Jeremy RODE, David SMITH, Anis HUSAIN, Mark HSU
  • Publication number: 20150085853
    Abstract: Dynamic, untethered array nodes are frequency, phase, and time aligned/synchronized, and used to focus their transmissions of the same data coherently on a target or in the target's direction, using time reversal or directional beamforming. Information for alignment/synchronization may be sent from a master node of the array to other nodes, over non-RF links, such as optical and acoustic links. Some nodes may be connected directly to the master nodes, while other nodes may be connected to the master node through one or more transit nodes. A transit nodes may operate to (2) terminate the link when the alignment/synchronization information is intended for the node, and (2) pass through the alignment/synchronization information to another node without imposing its local clock properties on the passed through alignment/synchronization information. In this way, an end point node may be aligned/synchronized to the master node without a direct link between the two nodes.
    Type: Application
    Filed: September 4, 2014
    Publication date: March 26, 2015
    Applicant: ZIVA CORPORATION
    Inventors: David SMITH, Anis HUSAIN, Jeremy RODE, Mark HSU
  • Publication number: 20140301494
    Abstract: Dynamic, untethered array nodes are frequency, phase, and time aligned, and used to focus their transmissions of the same data coherently on a target, using time reversal. Alignment may be achieved separately for the radio frequency (RF) carriers and the data envelopes. Carrier alignment may be by phase conjugation. The data is distributed across the nodes. Data distribution and/or alignment may be performed by a Master node of the array. The nodes capture a sounding signal from the target, in the same time window. Each node converts the captured sounding signal to baseband, for example, using in-phase/quadrature downconversion. Each node stores the baseband samples of the sounding pulse. Each node convolves time-reversed samples of the sounding signal with the data, and upconverts the convolved data to radio frequency. The nodes emit their respective convolved and upconverted data so that the emissions focus coherently at the target.
    Type: Application
    Filed: April 7, 2014
    Publication date: October 9, 2014
    Applicant: ZIVA CORPORATION
    Inventors: Mark HSU, David SMITH, Jeremy RODE, Anis HUSAIN
  • Publication number: 20140126567
    Abstract: Methods and systems for coherent distributed communication techniques using time reversal are disclosed. In one aspect, cooperating nodes of a cluster can move relative to each other and relative to an intended receiver of the nodes' data transmissions. The nodes are synchronized to a common time reference, and data for transmission from the cluster is distributed to the nodes. The intended receiver sends a sounding signal to the nodes. Each node receives the sounding signal, obtains the channel response between the intended receiver and itself, and time-reverses the channel response. Each node then convolves its time-reversed channel response with the data to obtain the node's convolved data Each node waits a predetermined time following the time reference signal, as determined based on the common time reference.
    Type: Application
    Filed: May 2, 2012
    Publication date: May 8, 2014
    Inventors: Anis Husain, Jeremy Rode, David Smith, Mark Hsu, Maha Achour
  • Publication number: 20120328037
    Abstract: Methods, apparatus, and articles of manufacture make Geolocation of a source transmitter more difficult or impossible. Scatterers common to a source transmitter and an intended receiver are identified using a variety of techniques, such as iterative time reversal (ITR) and Singular Value Decomposition (SVD) of a scatter matrix. The source transmitter then uses time reversal and knowledge of the signatures of the scatterers to focus its transmissions on one or more of the scatterers, instead of the intended receiver. The source transmitter may have multiple antennas or antenna elements. The source transmitter and/or the intended receiver may include antenna elements with Near-Field Scatterers to enable spatial focusing below the diffraction limit at the frequencies of interest. The source transmitter may be a plurality of ad hoc nodes cooperating with each other.
    Type: Application
    Filed: May 2, 2012
    Publication date: December 27, 2012
    Inventors: Mark Hsu, David Smith, Jeremy Rode, Anis Husain, Maha Achour
  • Patent number: 6995794
    Abstract: A low cost camera by implementing the major functions in host software is provided. This is accomplished by sending raw, digitized data from the camera directly to the host. The increased volume of raw data is handled by either an improved compression/decompression scheme using lossless compression, using lossy compression or using a shared bus with higher bandwidth. By moving such functions as color processing and scaling to the host, the pixel correction can also be moved to the host. This in turn allows the elimination of the frame buffer memory from the camera. Finally, the camera can use a low cost lens by implementing vignetting, distortion, gamma or aliasing correction with a correction value stored in a register of the camera for later access by the host to perform corrections.
    Type: Grant
    Filed: May 18, 2001
    Date of Patent: February 7, 2006
    Assignee: Logitech Europe S.A.
    Inventors: Mark Hsu, Mitchell Norcross, Georges Auberger, Remy Zimmermann, Sergio Maggi, George Sanchez, Bryed Billerbeck, Wei Li, Jean-Michel Junien Labrousse
  • Publication number: 20050162531
    Abstract: A low cost camera by implementing the major functions in host software is provided. This is accomplished by sending raw, digitized data from the camera directly to the host. The increased volume of raw data is handled by either an improved compression/decompression scheme using lossless compression, using lossy compression or using a shared bus with higher bandwidth. By moving such functions as color processing and scaling to the host, the pixel correction can also be moved to the host. This in turn allows the elimination of the frame buffer memory from the camera. Finally, the camera can use a low cost lens by implementing vignetting, distortion, gamma or aliasing correction with a correction value stored in a register of the camera for later access by the host to perform corrections.
    Type: Application
    Filed: March 25, 2005
    Publication date: July 28, 2005
    Applicant: Logitech Europe S.A.
    Inventors: Mark Hsu, Mitchell Norcross, Georges Auberger, Remy Zimmermann, Sergio Maggi, George Sanchez, Bryed Billerbeck, Wei Li, Jean-Michel Labrousse
  • Publication number: 20050120322
    Abstract: A method for performing power routing on a voltage island within an integrated circuit chip is disclosed. A first power grid is generated for a voltage island on metal levels 1 to N-1. Then, a second power grid is generated on metal levels N and above. A bounding region of the second robust power grid is determined. Finally, the shortest distance connections from a set of power sources is routed to the second power grid.
    Type: Application
    Filed: November 3, 2004
    Publication date: June 2, 2005
    Applicant: International Business Machines Corporation
    Inventors: Bing Chen, Scott Gould, Mark Hsu, Patrick Ryan, Erich Schanzenbach
  • Patent number: 6412024
    Abstract: An improved audio-output device coupleable to a computer system, in which a DSP operating under software control emulates a common command interface. The command interface has a set of registers that are made available to the CPU for reading and writing, even if there are no such physical registers available in the device. The DSP also performs tasks in addition to audio-output, even though the audio-output device is required to respond immediately to commands from the CPU. The audio-output device has a DSP for interpreting and executing commands received from the CPU, a local memory for storing data input to or output from the DSP, a bus-interface (BIF) element for coupling the DSP and memory to a system bus, and a direct memory access (DMA) element for transferring data between the local memory and the system bus.
    Type: Grant
    Filed: September 27, 2000
    Date of Patent: June 25, 2002
    Assignee: Sigma Designs, Inc.
    Inventors: Mark Hsu, Yann Le Cornec, Julien T. Nguyen
  • Publication number: 20020039139
    Abstract: A low cost camera by implementing the major functions in host software is provided. This is accomplished by sending raw, digitized data from the camera directly to the host. The increased volume of raw data is handled by either an improved compression/decompression scheme using lossless compression, using lossy compression or using a shared bus with higher bandwidth. By moving such functions as color processing and scaling to the host, the pixel correction can also be moved to the host. This in turn allows the elimination of the frame buffer memory from the camera. Finally, the camera can use a low cost lens by implementing vignetting, distortion, gamma or aliasing correction with a correction value stored in a register of the camera for later access by the host to perform corrections.
    Type: Application
    Filed: May 18, 2001
    Publication date: April 4, 2002
    Applicant: Logitech Europe S.A.
    Inventors: Mark Hsu, Mitchell Norcross, Georges Auberger, Remy Zimmermann, Sergio Maggi, George Sanchez, Bryed Billerbeck, Wei Li, Jean-Michel Junien Labrousse
  • Patent number: 6175880
    Abstract: An improved audio-output device coupleable to a computer system, in which a DSP operating under software control emulates a common command interface. The command interface has a set of registers that are made available to the CPU for reading and writing, even if there are no such physical registers available in the device. The DSP also performs tasks in addition to audio-output, even though the audio-output device is required to respond immediately to commands from the CPU. The audio-output device has a DSP for interpreting and executing commands received from the CPU, a local memory for storing data input to or output from the DSP, a bus-interface (BIF) element for coupling the DSP and memory to a system bus, and a direct memory access (DMA) element for transferring data between the local memory and the system bus.
    Type: Grant
    Filed: August 17, 1998
    Date of Patent: January 16, 2001
    Assignee: Sigma Designs, Inc.
    Inventors: Mark Hsu, Yann Le Cornec, Julien T. Nguyen
  • Patent number: 6157888
    Abstract: A method and apparatus for smoothing a throttle plate position command prior to being used by a closed loop throttle control unit. The method sequentially indexes through a lookup table storing a series of values of a smoothing function at routine time intervals. The difference between the current throttle plate command and the received throttle plate command is multiplied by the value of the smoothing function indexed from the lookup table. The product is then added to a reference throttle plate position command to generate a series of smoothed throttle plate position commands applied to the throttle control unit which provides smoother operation.
    Type: Grant
    Filed: February 8, 1999
    Date of Patent: December 5, 2000
    Assignee: Ford Global Technologies, Inc.
    Inventors: Paul Michael Suzio, Liang Tang, Chao Sen (Mark) Hsu
  • Patent number: 5797029
    Abstract: An improved audio-output device coupleable to a computer system, in which a DSP operating under software control emulates a common command interface. The command interface has a set of registers that are made available to the CPU for reading and writing, even if there are no such physical registers available in the device. The DSP also performs tasks in addition to audio-output, even though the audio-output device is required to respond immediately to commands from the CPU. The audio-output device has a DSP for interpreting and executing commands received from the CPU, a local memory for storing data input to or output from the DSP, a bus-interface (BIF) element for coupling the DSP and memory to a system bus, and a direct memory access (DMA) element for transferring data between the local memory and the system bus.
    Type: Grant
    Filed: January 22, 1997
    Date of Patent: August 18, 1998
    Assignee: Sigma Designs, Inc.
    Inventors: Mark Hsu, Yann Le Cornec, Julien T. Nguyen