Patents by Inventor Athanasios Kasapi

Athanasios Kasapi 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: 9917655
    Abstract: Physical-layer information is conveyed within a packetized communication network via a timing-modulated side channel to yield low-latency physical interface control without consuming host-layer signaling bandwidth. Multi-modal transceivers at opposite ends of a signaling link optionally communicate to confirm mutual support and signaling headroom for timing-modulated information exchange before transitioning from an in-band feedback mode to a side-channel feedback mode.
    Type: Grant
    Filed: November 2, 2016
    Date of Patent: March 13, 2018
    Assignee: CADENCE DESIGN SYSTEMS, INC.
    Inventors: Athanasios Kasapi, Stefanos Sidiropoulos
  • Publication number: 20080004078
    Abstract: Methods and apparatuses, including computer program products, for spatial processing in a radio receiver. One embodiment is a radio receiver for operation in a wireless communication system. The radio receiver may include a receive processing unit to process signals received by an antenna array by applying a selected spatial processing mode of a plurality of spatial processing modes. The modes include one or more modes of one or more spatial processing methods. The receiver also includes a selector to select the spatial processing mode from the plurality of spatial processing modes. The selecting includes selecting the spatial processing method in the case that the set of spatial processing modes are of more than one spatial processing method.
    Type: Application
    Filed: September 12, 2007
    Publication date: January 3, 2008
    Inventors: Craig Barratt, Athanasios Kasapi
  • Publication number: 20070165552
    Abstract: A system and related methods for beamforming in a multi-point communication environment is presented. According to one aspect of the invention, a method comprising identifying one or more target(s) for which a communication signal is intended, identifying one or more other target(s) which may benefit from receipt of the communication signal, and developing a multi-lobe beampattern to transmit the communication signal to the intended target(s) and the identified one or more other target(s).
    Type: Application
    Filed: March 13, 2007
    Publication date: July 19, 2007
    Inventors: Athanasios Kasapi, Jason Liu
  • Publication number: 20060146969
    Abstract: Synchronization and impairment estimations can be performed jointly, thereby saving valuable time for decoding of the received packet. An initial synchronization in a TDMA system can be performed. Using this synchronization, the frequency offset choices and timing offset choices can be advantageously bounded within predetermined ranges. At this point, an algorithm can find the minimum error that gives the best frequency offset choice and timing offset choice combination over their respective ranges, together with the estimates of the signal magnitude and phase and at least one of a DC offset magnitude and phase, and a spur magnitude and phase.
    Type: Application
    Filed: December 30, 2004
    Publication date: July 6, 2006
    Inventors: Ning Zhang, Athanasios Kasapi, William McFarland
  • Publication number: 20060099955
    Abstract: Methods and systems are provided for assigning channels in a spatial division multiple access communication network. The network includes a plurality of conventional channels some of which are configurable to be shared concurrently by plural subscribers. The method includes determining combinations of subscribers from the existing subscribers. Enhancement activities are invoked to create optimal combinations of existing subscribers. Existing subscribers are reassigned as necessary to share channels thereby freeing resources for new subscribers.
    Type: Application
    Filed: December 12, 2005
    Publication date: May 11, 2006
    Inventors: Athanasios Kasapi, Peter Khoury, Anne-Flore Roger
  • Publication number: 20060040708
    Abstract: Spatial and temporal characteristics of received radio signals in a multiple user radio system can be estimated based on signals received from the users. In one embodiment, the invention includes collecting measurements of radio frequency signals received at different elements of an antenna system over time, the received signals corresponding at least in part to transmissions received from a system user, collecting representations of the transmissions of the system user, and comparing the representations to the collected measurements to form a spatial characterization of the radio channel traversed by transmissions of the system user in which the elements of the spatial characterization represent forming a beam in the direction of the system user and directing nulls to interferers.
    Type: Application
    Filed: October 12, 2005
    Publication date: February 23, 2006
    Inventors: James Steele, Todd Chauvin, Adam Kerr, Athanasios Kasapi
  • Patent number: 6573991
    Abstract: A radiation sensing method and device that is used to measure physical properties of materials over a wide dynamic range. The sensor (20) comprises multiple radiation sources and multiple detectors at multiple separation distances. The detected signals from the different sources are separated and then combined mathematically in a manner such that the combination is self-compensated for both component drift and changes in radiation coupling efficiency between the source or detector and the material of interest. In a preferred embodiment, the biomass in a liquid cell culture (54) is measured with high accuracy over a wide dynamic range using optical wavelength radiation. The measurement can be made with the sensor external to the liquid culture container in a manner that is compensated for the thickness of the container window (50).
    Type: Grant
    Filed: April 26, 2000
    Date of Patent: June 3, 2003
    Inventors: Martin Paul Debreczeny, Michael Patrick O'Neil, Athanasios Kasapi