Patents Assigned to Sibeam, Inc.
  • Patent number: 9531986
    Abstract: A method and apparatus for identifying devices using a bitmap are disclosed. In one embodiment, the method comprises: accessing a memory to obtain one or more bitmaps that map each bit location in the bitmap to an index value, where one index value is assigned to each remote wireless media device of a wireless network in a wireless communication system; and examining those bitmaps and determining at least one characteristic of a remote wireless media device and a device identifier that identifies the remote wireless media device in the wireless network based on the bit position in those bitmaps.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: December 27, 2016
    Assignee: SiBEAM, Inc.
    Inventors: In Sung Cho, Kumar Mahesh, Prakash Kamath, Jeffrey Gilbert, Rob Frizzell
  • Patent number: 9264762
    Abstract: An apparatus, system and method for performing dispatch operations using a signal physical interface are disclosed. In one embodiment, the apparatus is for use in a wireless communication system for communicating with a wireless network and comprises a host processor, a transceiver, a physical interface coupling the host processor and the transceiver, and a memory accessible by the host processor and the transceiver to exchange information between the host processor and the transceiver. The transceiver is operable to store data in the memory for the host processor to send data to the host processor using the memory and asserts a control signal to the host processor to notify the host processor that the memory contains data for the host processor, and the host processor is operable to access the memory to obtain the data thereafter.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: February 16, 2016
    Assignee: SiBEAM, Inc.
    Inventors: In Sung Cho, Kumar Mahesh, Prakash Kamath, Jeffrey Gilbert, Rob Frizzell
  • Patent number: 8897719
    Abstract: A method and apparatus for initializing a transceiver in a wireless communication system.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: November 25, 2014
    Assignee: Sibeam, Inc.
    Inventors: In Sung Cho, Kumar Mahesh, Prakash Kamath, Jeffrey Gilbert, Rob Frizzell
  • Patent number: 8750241
    Abstract: A wireless station has a media access controller (MAC) and a concurrent association manager. The concurrent association manager concurrently associates the wireless station with two or more wireless coordinators. Each wireless coordinator forms its respective wireless network. The concurrent association manager sets the wireless station in a sleep mode operation with respect each wireless network and detects a selection for operation with respect to one of the wireless coordinator.
    Type: Grant
    Filed: December 7, 2007
    Date of Patent: June 10, 2014
    Assignee: SiBeam, Inc.
    Inventors: Kumar Mahesh, Jeffrey M. Gllbert, James Gilb
  • Patent number: 8588193
    Abstract: Enhanced wireless speeds are obtained using multiple transmission beams. In one example a transmitter sends data packets through an antenna array using multiple spatial beams and a plurality of analog converters. A receiver receives feedback from a remote station, the feedback including a quality measure of data packets received from the transmitter. A processor to controls transmission parameters of the transmitter using the feedback, the processor having a plurality of states, in a first channel analysis state, the processor determining a beam-forming vector for the antenna array, in a second beam search and training state, the processor determining pre-coding coefficients for the data packets, and in a third high rate transmission state, the processor providing pre-coded data packets to the transmitter for transmission, wherein the processor transitions from the third state to the first state upon receiving a reduced quality measure from the remote station.
    Type: Grant
    Filed: February 3, 2010
    Date of Patent: November 19, 2013
    Assignee: Sibeam, Inc.
    Inventors: Keangpo Ricky Ho, Jianhan Liu, Guocong Song, Karim Nassiri Toussi, Jeffrey M. Gilbert
  • Patent number: 8457026
    Abstract: Enhanced wireless speeds are obtained using multiple transmission beams. In one example, a transmitter has a signal processor to receive a plurality of data streams, a plurality of analog converters each coupled to the signal processor to receive the plurality of data streams from the signal processor and to modulate the data streams onto carrier waves, and a plurality of phase shifters each coupled to an analog converter to each receive a modulated stream. A first antenna is coupled to more than one of the plurality of phase shifters to receive the modulated data stream from each phase shifter and transmit it on its respective carrier wave, and a second antenna is coupled to receive at least one modulated data stream and transmit it on its respective carrier wave.
    Type: Grant
    Filed: February 3, 2010
    Date of Patent: June 4, 2013
    Assignee: Sibeam, Inc.
    Inventors: Keang-Po Ricky Ho, Jianhan Liu, Guocong Song, Karim Nassiri Toussi, Jeffrey M. Gilbert
  • Patent number: 8341271
    Abstract: A method and apparatus for performing device discovery in a wireless communication system is described.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: December 25, 2012
    Assignee: Sibeam, Inc.
    Inventors: In Sung Cho, Kumar Mahesh, Prakash Kamath, Jeffrey Gilbert, Rob Frizzell
  • Patent number: 8279784
    Abstract: An audio/video (AV) processor is coupled to a media access controller (MAC) to generate a composite packet having an optimized format for carrying audio, video, and data traffic with fields in a header of the composite packet specifying video-specific information. A physical device interface (PHY) is coupled to the MAC. The PHY encodes and decodes between a digital signal and a modulated analog signal. The PHY comprises a high rate physical layer circuit (HRP) and a low rate physical layer circuit (LRP). A radio frequency (RF) transmitter is coupled to the PHY to transmit data.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: October 2, 2012
    Assignee: Sibeam, Inc.
    Inventors: Ching-Hsiu Chiang, Jeffrey M. Gilbert, Victor Ramamoorthy
  • Patent number: 8229352
    Abstract: A device has an RF mixer, an IF mixer module, a single synthesizer, a frequency divider, a single side band mixer and a frequency quadrupler. The single synthesizer generates a signal to the IF mixer module, the frequency divider, and the single side band mixer. The single side band mixer mixes signals from the single synthesizer and the frequency divider. The frequency quadrupler receives the output of the single side band mixer. The RF mixer is coupled to the frequency quadrupler and the IF mixer module.
    Type: Grant
    Filed: July 2, 2008
    Date of Patent: July 24, 2012
    Assignee: SiBeam, Inc.
    Inventors: Chinh Doan, Sohrab Emami
  • Patent number: 8170617
    Abstract: A radio frequency (RF) transmitter is coupled to and controlled by a processor to transmit data. A physical layer circuit is coupled to the RF transmitter to encode and decode between a digital signal and a modulated analog signal. The physical layer circuit comprises a high rate physical layer circuit (HRP) and a low rate physical layer circuit (LRP). In a first embodiment, the LRP circuit generates a LRP packet comprising an LRP transmit power control feedback. In a second embodiment, the LRP and HRP circuit generate a packet comprising a beam-forming phase and magnitude feedback information. In a third embodiment, the LRP and HRP circuit supports up to 64 independent transmit antenna elements.
    Type: Grant
    Filed: March 25, 2008
    Date of Patent: May 1, 2012
    Assignee: SiBeam, Inc.
    Inventors: Karim Nassiri-Toussi, Jeffrey M. Gilbert
  • Patent number: 8170522
    Abstract: A circuit features a balun having an unbalanced input and a balanced output, and a differential coupler having a symmetrical structure about a center axis. The differential coupler has a differential input and a differential output, the differential input being coupled to the balanced output of the balun. An impedance element is coupled to a circuit node of the differential coupler at a point along the center axis. Other embodiments are also described and claimed.
    Type: Grant
    Filed: November 9, 2007
    Date of Patent: May 1, 2012
    Assignee: SiBeam, Inc.
    Inventors: Xiang Guan, Chinh Huy Doan, Sohrab Emami-Neyestanak
  • Patent number: 8155712
    Abstract: A radio frequency (RF) transmitter has a plurality of digitally controlled phased array antennas coupled to and controlled by the processor to transmit data. The processor is to enable one or more antennas to be turned off during a use of the apparatus to reduce a power consumption of the apparatus.
    Type: Grant
    Filed: March 22, 2007
    Date of Patent: April 10, 2012
    Assignee: SIBEAM, Inc.
    Inventors: James P. K. Gilb, Jeffrey M. Gilbert, Sheung Li, Karim Nassiri-Toussi
  • Patent number: 8116333
    Abstract: A method and apparatus for performing connection control in a wireless communication system is described. In one embodiment, an apparatus is used in a wireless communication system for communicating with a wireless network, and the apparatus comprises a host processor, a transceiver, a physical interface coupling the host processor and the transceiver; and a memory accessible by the host processor and the transceiver to exchange information between the host processor and the transceiver. The memory has multiple banks that include: a first bank to store information being transferred from the host processor to the transceiver, and a second bank to store information being transferred from the transceiver to the host processor, the second bank being different than the first bank, to facilitate full-duplex communication of packet data between the host processor and the transceiver.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: February 14, 2012
    Assignee: Sibeam, Inc.
    Inventors: In Sung Cho, Kumar Mahesh, Prakash Kamath, Jeffrey Gilbert, Rob Frizzell
  • Patent number: 8022887
    Abstract: An antenna is disclosed. In one embodiment, the antenna comprises a driver comprising a folded dipole and an integral balun coupled to the folded dipole.
    Type: Grant
    Filed: October 26, 2006
    Date of Patent: September 20, 2011
    Assignee: Sibeam, Inc.
    Inventor: Rokhsareh Zarnaghi
  • Patent number: 8014416
    Abstract: A radio frequency (RF) transmitter is coupled to and controlled by a processor to transmit data. A physical layer circuit is coupled to the RF transmitter to encode and decode between a digital signal and a modulated analog signal. The physical layer circuit comprises a high rate physical layer circuit (HRP) and a low rate physical layer circuit (LRP). The low rate channels generated by the low rate physical layer circuit (LRP) share a same frequency band as a corresponding high rate channel generated by the high rate physical layer circuit (HRP).
    Type: Grant
    Filed: February 13, 2007
    Date of Patent: September 6, 2011
    Assignee: Sibeam, Inc.
    Inventors: Keangpo Ricky Ho, Karim Nassiri-Toussi, Dengwei Fu, Stephen P. Pope, Jeffrey M. Gilbert, Chuen-Shen Shung, Jianhan Liu
  • Patent number: 7986753
    Abstract: A modified branch metric for decoders and equalizers is described. In one embodiment the branch metric includes determining a set of branch metric values for symbols of a received digital signal, the branch metric values indicating a correlation between symbols obtained using a reduced calculation set, the reduced calculation set being obtained by adding a common term to all of the branch metric values before determining the correlation. The branch metric may be followed by determining path metrics for paths through a decision tree using the branch metric values, and selecting a path and a corresponding symbol sequence in the received digital signal using the path metric values.
    Type: Grant
    Filed: September 14, 2007
    Date of Patent: July 26, 2011
    Assignee: Sibeam, Inc.
    Inventors: Pulakesh Roy, Keang-Po Ho
  • Patent number: 7982669
    Abstract: A method and apparatus for adaptive beam-steering are disclosed. In one embodiment, the method comprises performing adaptive beam steering using multiple transmit and receive antennas, including iteratively performing a pair of training sequences, wherein the pair of training sequences includes estimating a transmitter antenna-array weight vector and a receiver antenna-array weight vector.
    Type: Grant
    Filed: March 26, 2010
    Date of Patent: July 19, 2011
    Assignee: Sibeam, Inc.
    Inventors: Karim Nassiri-Toussi, Jeffrey M. Gilbert, Chuen-Shen Shung, Dmitry M. Cherniavsky
  • Patent number: 7948961
    Abstract: A wireless content protection system includes a coordinator, a source device, and a sink device. The coordinator includes a scheduler. The source and sink devices each have a content protection manager. One of the content protection manager allocates and releases bandwidth via the coordinator for a test message and a response message for a round-trip time computation. The test message is transmitted in a source-to-sink channel time block. The response message is transmitted in a sink-to-source channel time block. The round-trip time is the period between the end of the source-to-sink channel time block and the beginning of the sink-to-source channel time block.
    Type: Grant
    Filed: January 25, 2008
    Date of Patent: May 24, 2011
    Assignee: Sibeam, Inc.
    Inventors: Kumar Mahesh, Karthik Krishnaswami, Karen Wang, Jeffrey M. Gilbert, Chuen-Shen (Bernard) Shung, Chih-Yuan Hsieh, Kyeong Ryu, Prakash Kamath
  • Patent number: 7915909
    Abstract: Over the air or radiated testing of an RF microelectronic or integrated circuit device under test (DUT) that has an integrated millimeter wave (mmw) antenna structure, is described. The antenna structure may have multiple elements in an array design that may be driven and/or sensed by integrated RF transmitter and/or receiver circuitry. An interface printed wiring board (e.g., a tester load board or a wafer probe card assembly) has formed in it a mmw radiation passage that is positioned to pass mmw radiation to and/or from the integrated antenna of the DUT. Test equipment may be conductively coupled to contact points of the interface board, to transmit and/or receive signals for testing of the DUT and/or provide dc power to the DUT. A test antenna is designed and positioned to receive and/or transmit mmw radiation through the passage, from and/or to the integrated DUT antenna. Other embodiments are also described and claimed.
    Type: Grant
    Filed: March 31, 2008
    Date of Patent: March 29, 2011
    Assignee: Sibeam, Inc.
    Inventors: Clifford J. Dunn, George Palmer, Jeffrey M. Gilbert
  • Patent number: 7881258
    Abstract: A system is disclosed having a transmitter to wirelessly transmit multi-media data. The transmitter includes a module to packetize phase units of a multimedia frame that is to be transmitted. The system also includes a receiver to receive the multimedia frame received from the transmitter. The receiver includes a post processing module to perform error concealment on the phase units.
    Type: Grant
    Filed: March 21, 2007
    Date of Patent: February 1, 2011
    Assignee: Sibeam, Inc.
    Inventors: Jeffrey M. Gilbert, Kannan Ramchandran, Guocong Song