Patents by Inventor Sirikiat Ariyavisitakul

Sirikiat Ariyavisitakul 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: 9768843
    Abstract: Systems and methods for enabling a wireless backhaul network between access points (APs) in a wireless network are provided. In an embodiment, the wireless backhaul network is enabled using a Massive Multiple Input Multiple Output (MIMO) radio access technology (RAT). In another embodiment, the wireless backhaul network is established using the same RAT as used by the APs to serve user devices, and can utilize the same time and frequency resources used for user communication.
    Type: Grant
    Filed: March 21, 2014
    Date of Patent: September 19, 2017
    Inventors: Murat Mese, Yan Wang, Nihar Jindal, Louay Jalloul, Arogyaswami Paulraj, Amin Mobasher, Sirikiat Ariyavisitakul, James Bennett, Sam Alex
  • Patent number: 9532256
    Abstract: Embodiments include systems and methods for improving the beamforming efficiency of Multi-User Multiple Input Multiple Output (MU-MIMO) and/or Coordinate Beamforming (CB) in wireless multi-access networks. In one aspect, a receiver-aided approach for MU-MIMO and/or CB is provided. Unlike conventional MU-MIMO/CB operation which is transparent to the UE, the receiver-aided approach herein makes information about potential MU-MIMO and/or CB multi-user interference available to UEs being considered for MU-MIMO and/or CB transmission. As such, the UEs can provide Channel State Information (CSI) that is better tailored to actual data transmission conditions than in conventional operation, and the base station can make better decisions regarding MU-MIMO and/or CB operation, user selection, and transmission parameters (e.g., number of data streams, precoder matrix, etc.).
    Type: Grant
    Filed: July 17, 2014
    Date of Patent: December 27, 2016
    Assignee: Broadcom Corporation
    Inventors: Sirikiat Ariyavisitakul, Daewon Lee
  • Patent number: 9479236
    Abstract: For an infinite number of transmit antennas at a base station (BS), matched filter (MF) precoding (a type of precoding used to perform SU-MIMO transmission) becomes optimal for performing spatial multiplexing. But observations have shown that precoding types for performing MU-MIMO transmission can perform significantly better than MF precoding for a realizable number of transmit antennas at the BS, even while using the simplest precoding types for MU-MIMO transmission. For large inter-cell interference typically encountered by user terminals (UTs) at or near the boundary of the cell served by the BS, MF precoding can still be used to eliminate or reduce the need for coordination among cells, which consumes network and back-haul resources.
    Type: Grant
    Filed: November 15, 2013
    Date of Patent: October 25, 2016
    Assignee: Broadcom Corporation
    Inventors: Lek (Sirikiat) Ariyavisitakul, Louay Jalloul, Amin Mobasher
  • Patent number: 9258161
    Abstract: The present disclosure is directed to a system and method for extending a reference signal pattern to define additional reference signals using a phase division multiplexing (PDM) technique. The reference signal pattern can be a predefined reference signal pattern in a wireless communication standard and can be extended to support massive MIMO communication.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: February 9, 2016
    Assignee: Broadcom Corporation
    Inventors: Louay Jalloul, Amin Mobasher, Sirikiat Ariyavisitakul
  • Patent number: 9036516
    Abstract: In transmit pre-coding, a bandwidth and a feedback period to one or more CQI reporting units and a bandwidth and a feedback period to one or more PMI reporting units are assigned, respectively. Sub-divisions in time and/or frequency corresponding to the assigned bandwidths and the assigned feedback periods are dynamically adjusted based at least on uplink channel state information corresponding to the bandwidth and the feedback period assigned to the CQI reporting units, and the bandwidth and the feedback period assigned to the PMI reporting units. One or more feedback messages are generated based at least on the channel state information over the adjusted sub-divisions in time and/or frequency corresponding to the CQI reporting units and to the PMI reporting units, respectively. The bandwidth and/or the feedback period may be assigned based on the channel state information or as a function of a feedback rate.
    Type: Grant
    Filed: December 7, 2011
    Date of Patent: May 19, 2015
    Assignee: Broadcom Corporation
    Inventors: Mark Kent, Vinko Erceg, Jun Zheng, Sirikiat Ariyavisitakul
  • Patent number: 8982969
    Abstract: Aspects of a method and system for CQI/PMI feedback for precoded MIMO systems utilizing differential codebooks may include generating one or more feedback messages for one or more Channel Quality Indicator (CQI) reporting units based on at least channel state information associated with the one or more CQI reporting units. One or more differential feedback messages may be generated for one or more Pre-coding Matrix Index (PMI) reporting units based on at least channel state information associated with the one or more PMI reporting units, wherein the one or more PMI reporting units span a useable bandwidth. A bandwidth and a feedback period may be assigned to each of the one or more CQI reporting units and the one or more PMI reporting units to define the one or more CQI reporting units and the one or more PMI reporting units.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: March 17, 2015
    Assignee: Broadcom Corporation
    Inventors: Mark Kent, Vinko Erceg, Jun Zheng, Sirikiat Ariyavisitakul, Uri Landau
  • Publication number: 20150043450
    Abstract: Embodiments include systems and methods for improving the beamforming efficiency of Multi-User Multiple Input Multiple Output (MU-MIMO) and/or Coordinate Beamforming (CB) in wireless multi-access networks. In one aspect, a receiver-aided approach for MU-MIMO and/or CB is provided. Unlike conventional MU-MIMO/CB operation which is transparent to the UE, the receiver-aided approach herein makes information about potential MU-MIMO and/or CB multi-user interference available to UEs being considered for MU-MIMO and/or CB transmission. As such, the UEs can provide Channel State Information (CSI) that is better tailored to actual data transmission conditions than in conventional operation, and the base station can make better decisions regarding MU-MIMO and/or CB operation, user selection, and transmission parameters (e.g., number of data streams, precoder matrix, etc.).
    Type: Application
    Filed: July 17, 2014
    Publication date: February 12, 2015
    Applicant: Broadcom Corporation
    Inventors: Sirikiat ARIYAVISITAKUL, Daewon LEE
  • Publication number: 20150043480
    Abstract: Systems and methods for multi-subframe data transmission are provided. A multi-subframe scheduling (MSS) downlink subframe is transmitted from a base station to a user equipment (UE). The MSS downlink subframe includes a control signal that describes consecutive data transmissions in the MSS downlink subframe and in a plurality of subsequent downlink subframes. The plurality of subsequent downlink subframes include no control information, thereby allowing for control signaling overhead to be reduced.
    Type: Application
    Filed: August 6, 2014
    Publication date: February 12, 2015
    Applicant: BROADCOM CORPORATION
    Inventors: Daewon LEE, Sirikiat ARIYAVISITAKUL
  • Publication number: 20140307702
    Abstract: Systems and methods for enabling a wireless backhaul network between access points (APs) in a wireless network are provided. In an embodiment, the wireless backhaul network is enabled using a Massive Multiple Input Multiple Output (MIMO) radio access technology (RAT). In another embodiment, the wireless backhaul network is established using the same RAT as used by the APs to serve user devices, and can utilize the same time and frequency resources used for user communication.
    Type: Application
    Filed: March 21, 2014
    Publication date: October 16, 2014
    Inventors: Murat MESE, Yan WANG, Nihar JINDAL, Louay JALLOUL, Arogyaswami PAULRAJ, Amin MOBASHER, Sirikiat ARIYAVISITAKUL, James BENNETT, Sam ALEX
  • Publication number: 20140160957
    Abstract: A dedicated calibration device may be utilized by a wireless transceiver device, such as a base station, to compute compensation matrices. The wireless transceiver device and the dedicated calibration device can exchange training sequence signals. Based on the exchanged training sequence signals, the wireless transceiver device and the dedicated calibration device can estimate overall baseband to baseband channel responses taking into account the amplitude and phase responses of the respective transmit and receive radio chains, and the wireless transceiver device can determine the compensation matrices. Furthermore, the wireless transceiver device can estimate a baseband-to-baseband uplink channel response relative to actual user equipment, approximate a downlink channel response using only one of the determined compensation matrices, and perform beamforming to the actual user equipment using the approximated downlink channel response.
    Type: Application
    Filed: December 28, 2012
    Publication date: June 12, 2014
    Applicant: BROADCOM CORPORATION
    Inventors: Jun Zheng, Nihar Jindal, Sirikiat Ariyavisitakul, Eric Ojard
  • Publication number: 20140161205
    Abstract: The present disclosure is directed to a system and method for extending a reference signal pattern to define additional reference signals using a phase division multiplexing (PDM) technique. The reference signal pattern can be a predefined reference signal pattern in a wireless communication standard and can be extended to support massive MIMO communication.
    Type: Application
    Filed: March 15, 2013
    Publication date: June 12, 2014
    Applicant: Broadcom Corporation
    Inventors: Louay Jalloul, Amin Mobasher, Sirikiat Ariyavisitakul
  • Patent number: 8750089
    Abstract: A method and system for iterative discrete Fourier transform (DFT) based channel estimation using minimum mean square error (MMSE) techniques are presented. Aspects of the method and system include a procedure for computing channel estimates in both the time domain and frequency domain (or mixed domain) using an iterative DFT method based on MMSE techniques. One aspect of the method and system may achieve low computational complexity and produce more accurate channel estimate values in low signal to noise ratio (SNR) regimes in comparison to conventional DFT-based channel estimation methods, which utilize least squares (LS) techniques. The method and system disclosed herein may be practiced in connection with a wide range of orthogonal frequency division multiplexing (OFDM) based systems, for example wireless local area networks (WLAN, for example IEEE 802.11 WLAN systems), and LTE systems.
    Type: Grant
    Filed: March 26, 2010
    Date of Patent: June 10, 2014
    Assignee: Broadcom Corporation
    Inventors: Sirikiat Ariyavisitakul, Jun Zheng
  • Publication number: 20140133417
    Abstract: For an infinite number of transmit antennas at a base station (BS), matched filter (MF) precoding (a type of precoding used to perform SU-MIMO transmission) becomes optimal for performing spatial multiplexing. But observations have shown that precoding types for performing MU-MIMO transmission can perform significantly better than MF precoding for a realizable number of transmit antennas at the BS, even while using the simplest precoding types for MU-MIMO transmission. For large inter-cell interference typically encountered by user terminals (UTs) at or near the boundary of the cell served by the BS, MF precoding can still be used to eliminate or reduce the need for coordination among cells, which consumes network and back-haul resources.
    Type: Application
    Filed: November 15, 2013
    Publication date: May 15, 2014
    Applicant: BROADCOM CORPORATION
    Inventors: Lek (Sirikiat) ARIYAVISITAKUL, Louay JALLOUL, Amin MOBASHER
  • Publication number: 20140119205
    Abstract: Hybrid multi-cell channel estimation. At least two different operational modes associated with performing multi-cell channel estimation are combined and performed within different respective iterations of processing in order to generate a multi-cell channel estimate. A device, including at least one wireless interface to support communications with at least one other device and also including at least one processor to process signals received by or to be transmitted from, is operative to generate a multi-cell channel estimate corresponding to two or more respective cells with which the device may communicate. A first operational mode corresponds to time domain (TDOM) based per-tap serial interference cancellation (SIC), and a second operational mode corresponds to frequency domain (FDOM) based per-cell SIC. One implementation operates with no more than one iteration of TDOM based per-tap SIC, and no more than two iterations of FDOM based per-cell SIC.
    Type: Application
    Filed: October 26, 2012
    Publication date: May 1, 2014
    Applicant: BROADCOM CORPORATION
    Inventors: Baoguo Yang, Joonsuk Kim, Lek (Sirikiat) Ariyavisitakul, Nelson R. Sollenberger
  • Patent number: 8472543
    Abstract: Aspects of a method and system for predicting CQI values for ML detection in a 2×2 MIMO system are presented. In one aspect of the system, a CQI value for a MIMO communication system may be computed based on a computed channel realization by reverse mapping the computed channel realization to a corresponding CQI value. Based on the computed CQI value, a coding rate may be selected. The coding rate may be selected from a lookup table, wherein the computed CQI value is utilized as an index to the lookup table. The reverse mapping may utilize a function, which is computed using radial basis function networks. In another aspect of the system, a joint mutual information value may be computed for the MIMO communication system. The joint mutual information value may be computed based on a Shannon mutual information value and a matched filter mutual information value.
    Type: Grant
    Filed: April 27, 2009
    Date of Patent: June 25, 2013
    Assignee: Broadcom Corporation
    Inventors: Sirikiat Ariyavisitakul, Eric Ojard, Jun Zheng
  • Patent number: 8442142
    Abstract: A method and system for beamforming signal transmission under a per-antenna power constraint is presented. In one aspect, a multiple input multiple output (MIMO) transmitting station may compute a per-antenna power gain factor for each of a plurality of transmit chain signals. The transmit chain signals may be concurrently transmitted by a plurality of transmitting antennas at the MIMO transmitting station. The plurality of transmit chain signals may correspond to beamforming signals, which are generated by performing spatial mapping on a plurality of space-time signals. The plurality of power gain factors may be computed based on a per-antenna power constraint. Alternatively, the plurality of power gain factors may be computed based on joint per-antenna power and total-power constraints. Each of the transmit chain signals may be amplified or attenuated based on the corresponding antenna gain factor. The amplified or attenuated signal is then transmitted by the corresponding transmitting antenna.
    Type: Grant
    Filed: April 16, 2010
    Date of Patent: May 14, 2013
    Assignee: Broadcom Corporation
    Inventors: Eric Ojard, Sirikiat Ariyavisitakul, Joonsuk Kim
  • Patent number: 8412275
    Abstract: A method and system for communicating feedback information in a multiple user multiple input multiple output (MU-MIMO) communication system are presented. In one aspect of the method and system, a beamformer station may communicate a feedback information request to a plurality of beamformee stations. The feedback information request may request feedback data for a plurality of RF channel bands. The RF channel bands may form a multichannel. The beamformer may subsequently transmit a plurality of signals utilizing the RF channel bands within the multichannel. Each of the beamformees may receive the plurality of subsequently transmitted signals. A beamformee may generate the requested feedback data for each RF channel band within the multichannel. The beamformee may generate a beamforming report, which comprises the feedback data, which is generated across the plurality of RF channel bands in the multichannel. The beamformee may transmit the beamforming report to the beamformer.
    Type: Grant
    Filed: March 10, 2010
    Date of Patent: April 2, 2013
    Assignee: Broadcom Corporation
    Inventors: Joonsuk Kim, Sirikiat Ariyavisitakul
  • Patent number: 8306142
    Abstract: Aspects of a method and system for transmitter beamforming for reduced complexity multiple input multiple output (MIMO) transceivers are presented. Aspects of the system may include a MIMO transmitter that computes a channel estimate matrix and decomposes the computed channel estimate matrix based on singular value decomposition (SVD). Singular values in a singular value matrix may be rearranged and grouped to generate a plurality of submatrices. In one aspect, each of the submatrices may be decomposed based on GMD at a MIMO transmitter, while a MIMO receiver may utilize a vertical layered space time (VLST) method. In another aspect, the MIMO transmitter may utilize Givens rotation matrices corresponding to each of the submatrices, while the MIMO receiver may utilize maximum likelihood (ML) detection.
    Type: Grant
    Filed: March 15, 2010
    Date of Patent: November 6, 2012
    Assignee: Broadcom Corporation
    Inventor: Sirikiat Ariyavisitakul
  • Patent number: 8254507
    Abstract: Aspects of a system for STBC/SFBC in a communication system using angle feedback may include a receiver, which enables reception of signals via a plurality of receiving antennas. The receiver may enable computation of a rotation factor value based on the received signals and utilization of the computed rotation factor value to receive subsequent signals via the plurality of receiving antennas. The received signals may comprise preamble data. The receiver may enable computation of channel estimate values based on the received preamble data. A rotation angle value may be computed based on the computed channel estimate values. The rotation factor value may be computed based on the computed rotation angle value. The receiver may enable transmission of feedback information comprising the computed rotation factor and/or the computed rotation angle.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: August 28, 2012
    Assignee: Broadcom Corporation
    Inventors: Joonsuk Kim, Sirikiat Ariyavisitakul, Nambirajan Seshadri
  • Patent number: 8233557
    Abstract: Aspects of a system for subspace beamforming for near capacity MIMO performance may include a MIMO transmitter that computes one or more rotation angle values (?f) based on a channel estimate matrix (H). In instances when each rotation angle is computed based on a Euclidean distance criterion, each value ?f may also be computed based on a computed Euclidean distance. Alternatively, in instances when each rotation angle is computed based on a bit error rate (BER) criterion, each value ?f may also be computed based on a signal noise power level (N0). A plurality of spatial stream signals (xi) may be generated utilizing one or more constellation types. The constellation map for each constellation type may be rotated based on a corresponding value ?f. A plurality of transmit chain signals (txi) may be generated based on the signals xi and transmitted via a communication medium characterized by matrix H.
    Type: Grant
    Filed: October 6, 2008
    Date of Patent: July 31, 2012
    Assignee: Broadcom Corporation
    Inventors: Sirikiat Ariyavisitakul, Eric Ojard