Patents Assigned to RF DSP Inc.
  • Publication number: 20190181943
    Abstract: This invention presents a millimeter wave (mmWave) Distributed Wireless Smart Antenna (DWSA) or scanning-capable repeater that can form different radio wave beam patterns to scan for spatial beam direction(s) or beam alignment to build one or more mmWave wireless links with one or more User Equipment, and complete pass-through beamforming with one or more central base stations.
    Type: Application
    Filed: December 7, 2018
    Publication date: June 13, 2019
    Applicant: RF DSP Inc.
    Inventors: Ping Liang, Dengkui Zhu, Boyu Li
  • Patent number: 10277428
    Abstract: This invention presents methods for using spatial FFT to reduce the number of computations for generating the pre-coding matrix in a MIMO system comprising reducing the dimension of channel vectors by neglecting entries whose values are significantly smaller or near zero, and to select UEs into a group assigned to the same time and frequency resources.
    Type: Grant
    Filed: July 9, 2016
    Date of Patent: April 30, 2019
    Assignee: RF DSP INC.
    Inventor: Ping Liang
  • Publication number: 20190115963
    Abstract: This invention presents a method and systems for beamforming in wireless communication comprising a base station with a plural of antennas and radio frequency transmitting and receiving chains, a plural of base band transmitting paths and base band receiving paths, and a processor that constructs a subspace for each user equipment using the principal angle information contained in partial channel state information obtained on channels associated with a part of the BS antennas, derives an analog beamforming matrix and/or an analog combining matrix from the subspaces of all the user equipment selected for communication with the base station to achieve analog beamforming, and further performs beamforming at the base band.
    Type: Application
    Filed: April 10, 2017
    Publication date: April 18, 2019
    Applicant: RF DSP Inc.
    Inventor: Ping LIANG
  • Publication number: 20190111136
    Abstract: This invention provides methods and systems for achieving high-specificity killing of targeted cells using Magneto-Electric Nano-Particles (MENPs) and functional or diagnostic imaging that detects changes at the cellular level. Embodiments comprise injecting into a patient's body manufactured MENPs that have a higher tendency to accumulate near or attach to targeted cells through one or more physical forces and/or biological mechanisms; and applying a magnetic field to the MENPs to generate an action that is sufficient to cause death of the targeted cells, and using an imaging apparatus to image or detect a specific property of the MENPs or changes in a property of the MENPs due to the coupling of the MENPs with their surrounding environment.
    Type: Application
    Filed: December 12, 2018
    Publication date: April 18, 2019
    Applicant: RF DSP Inc.
    Inventor: Ping Liang
  • Publication number: 20190115988
    Abstract: This invention presents a channel emulator for testing a multi-user multiple input multiple output (MU-MIMO) wireless communication system using an over-the-air (OTA) connection between the antennas of a base station (BS) and the channel emulator. It uses pilot signals with special structures to estimate the channel matrix between the BS and the channel emulator, equalizes the channel when performing emulation of the channels between the BS and a plural of user equipment (UEs) in MU-MIMO communication.
    Type: Application
    Filed: April 21, 2017
    Publication date: April 18, 2019
    Applicant: RF DSP Inc.
    Inventors: Boyu Li, Ping Liang, Dengkui Zhu
  • Publication number: 20190115667
    Abstract: This invention presents embodiments of a coupler array to couple the RF signals between the antenna array of a MIMO base station and a MIMO RF channel emulator. The embodiments enable testing of a large scale MIMO wireless communication system without the need of connecting a large number of RF cables to the antenna ports of the MIMO base station.
    Type: Application
    Filed: July 14, 2017
    Publication date: April 18, 2019
    Applicant: RF DSP Inc.
    Inventors: Ping Liang, Dengkui Zhu
  • Publication number: 20190115958
    Abstract: This invention presents a Wireless Smart Antenna apparatus (WSA) comprising a Base Station Side Radio Unit (BSSRU) and a User Equipment Side Radio Unit (UESRU), wherein if a BSSRU is distributed in the coverage area of a Base Station (BS), the BSSRU communicates with one or more (BSs) using a first frequency band F1 and simultaneously communicates with one or more UESRUs using a second frequency band F2, or if a BSSRU is integrated into a BS, the BSSRU communicates with the BS baseband through circuits and communicates with one or more UESRUs using the second frequency band F2, wherein a UESRU communicates with one or more distributed or integrated BSSRUs using the second frequency band F2 and simultaneously communicates with one or more User Equipment (UEs) using the first frequency band F1, wherein one or more WSAs enable Multi-User Multiple Input Multiple Output spatial multiplexing in the F1 frequency band with UEs distributed over their coverage areas.
    Type: Application
    Filed: July 9, 2017
    Publication date: April 18, 2019
    Applicant: RF DSP Inc.
    Inventors: Ping Liang, Dengkui Zhu, Boyu Li
  • Publication number: 20190105410
    Abstract: This invention provides methods and systems for achieving high-specificity killing of targeted cells using Magneto-Electric Nano-Particles (MENPs) and functional or diagnostic imaging that detects changes at the cellular level. Embodiments comprise injecting into a patient's body manufactured MENPs that have a higher tendency to accumulate near or attach to targeted cells through one or more physical forces and/or biological mechanisms; and applying a magnetic field to the MENPs to generate an action that is sufficient to cause death of the targeted cells, and using an imaging apparatus to image or detect a specific property of the MENPs or changes in a property of the MENPs due to the coupling of the MENPs with their surrounding environment.
    Type: Application
    Filed: December 10, 2018
    Publication date: April 11, 2019
    Applicant: RF DSP Inc.
    Inventor: Ping Liang
  • Publication number: 20190097700
    Abstract: This invention presents methods for estimating MU-MIMO channel information using SU-MIMO channel information to choose a modulation and channel coding appropriate for the quality of the MU-MIMO channels, for adaptively selecting MU-MIMO precoding methods based on estimations of a plural of UEs and for compensating hardware impairments in MU-MIMO precoding.
    Type: Application
    Filed: September 25, 2017
    Publication date: March 28, 2019
    Applicant: RF DSP Inc.
    Inventors: Dengkui Zhu, Ping Liang
  • Publication number: 20190089431
    Abstract: This invention presents methods for estimating MU-MIMO channel information using SU-MIMO channel information to choose a modulation and channel coding appropriate for the quality of the MU-MIMO channels, for adaptively selecting MU-MIMO precoding methods based on estimations of a plural of UEs and for compensating hardware impairments in MU-MIMO precoding.
    Type: Application
    Filed: September 18, 2017
    Publication date: March 21, 2019
    Applicant: RF DSP Inc.
    Inventors: Dengkui Zhu, Ping Liang
  • Patent number: 10230436
    Abstract: This invention presents methods for signal detection and transmission in MU-MIMO wireless communication systems, for multiple UEs transmit uplink SRS to capture the uplink channel coefficients, and to estimate the frequency offsets and time offsets, for the BS estimating the channel coefficients of multiple UEs with the received SRS, for the BS estimating the frequency offsets and time offsets of multiple UEs with the estimated channel coefficients, for the BS modifying the estimated channel coefficients with the estimated frequency offsets and time offsets, for the BS calculating the detection matrices for the uplink MU-MIMO signal detection with the modified channel coefficients and for the BS calculating the precoding matrices for the downlink MU-MIMO signal transmission.
    Type: Grant
    Filed: October 20, 2015
    Date of Patent: March 12, 2019
    Assignee: RF DSP INC.
    Inventor: Ping Liang
  • Publication number: 20190074913
    Abstract: This invention presents a RF channel emulator for testing a large-scale Multiple-User Multiple-Input Multiple-Output (MU-MIMO) wireless communication system, including embodiments of using over-the-air channels for connecting a RF channel emulator and a large-scale MU-MIMO wireless communication system, calibration processes that maintain the over-the-air channel reciprocity, and emulation of carrier aggregation.
    Type: Application
    Filed: February 17, 2017
    Publication date: March 7, 2019
    Applicant: RF DSP Inc.
    Inventor: Ping LIANG
  • Patent number: 10171217
    Abstract: This invention provides SRS transmission methods to meet the Massive MIMO systems requirements. These methods are described in two separate categories. Firstly, enhancements to multiplex more channels in the same resources for a given SRS transmission and to provide Massive MIMO throughput performance improvements. Secondly, scheduling enhancements to provide adaptive UE-specific scheduling based on channel conditions for each UE. These methods can be combined in different ways in each BS to optimize the channel estimation system capacity for a given level of system performance.
    Type: Grant
    Filed: January 16, 2016
    Date of Patent: January 1, 2019
    Assignee: RF DSP INC.
    Inventors: Jason Brent, Dengkui Zhu, Ping Liang
  • Publication number: 20180351605
    Abstract: This invention presents Capacity Projectors (CaPs) for intelligent control and management that collect information on channel conditions, actual and/or predicted demand for connectivity, data throughput and its distribution for a first time period in the future using signaling and control messages, analyze the collected information to identify the configurations of the BSs and CaPs that are needed to produce desired MU-MIMO communication channels in the first time period to meet the connectivity and data throughput demand and its distribution in the first time period, and adaptively control and configure the CaPs to actively shape the MU-MIMO communication channels to meet the predicted demand and its distribution, wherein controlling and configuring the CaP comprises implementing which of the CaPs to switch to sleeping mode or work mode and adjusting one or more of transmitting power gain, antenna tilt, beam direction and/or pattern of the transmitter and/or receiver, filtering of the receiving and/or transm
    Type: Application
    Filed: January 28, 2017
    Publication date: December 6, 2018
    Applicant: RF DSP Inc.
    Inventor: Ping LIANG
  • Patent number: 10122492
    Abstract: This invention presents a method for uplink SRS transmission in MU-MIMO wireless communication systems comprising the BS reserving resources for SRS transmission and multiplexing the reserved resources among neighboring cells and among multiple UEs allocated to the same SRS transmission resource; the BS estimating the CQI of each UE through the uplink channel; and the BS allocating the same resource to a group of UEs to transmit uplink SRSs based on the estimated CQI and the QoS requirement.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: November 6, 2018
    Assignee: RF DSP INC.
    Inventors: Dengkui Zhu, Boyu Li, Ping Liang
  • Publication number: 20180309480
    Abstract: This invention presents a method and apparatuses for wireless networking comprising one or more BS with Nbs antennas; two or more SCs in the range of a BS where a SC has Nsc antennas, uses Nsc1?Nsc antennas for communication with a BS and uses Nsc2?Nsc antennas for communication with one or more UEs; at the same time a BS transmitting DL signals to K SCs using multi-user transmit BF in a frequency channel, a SC simultaneously transmitting DL signals to one or more UEs in its range using the same frequency channel; and, at the same time a BS receiving UL signals from K SCs using multi-user receive BF in a frequency channel, a SC simultaneously receiving UL signals from one or more UEs in its range using the same frequency channel. Furthermore, beamforming using antennas on the SCs is performed to reduce the inter-SC interferences.
    Type: Application
    Filed: September 27, 2017
    Publication date: October 25, 2018
    Applicant: RF DSP Inc.
    Inventor: Ping Liang
  • Publication number: 20180294861
    Abstract: This invention provides methods for Distributed Massive MIMO (DM-MIMO) that use one or more central Baseband Units (BBUs), one or more Multi-User Beamformers for each BBU performing multi-user MIMO computations, and a number of RRHs distributed over a geographic area.
    Type: Application
    Filed: March 30, 2018
    Publication date: October 11, 2018
    Applicant: RF DSP Inc.
    Inventors: Ping LIANG, Dengkui ZHU, Boyu LI
  • Publication number: 20180234157
    Abstract: This invention presents methods for MU-MIMO wireless communication systems comprising a BS with plural of antennas, either closely located or distributed; A plural of AFRs deployed over a coverage area, each AFR has N_BF?1 BF antennas with a beam pattern facing the MU-BFer and N_UF?1 UF antennas with a beam pattern facing UEs or downstream AFR(s); A channel estimation module for estimating the Total Channels between a plural of UEs and the BS with the AFRs in place; and, A MU-BFer that uses the estimates of the Total Channels to perform beamforming computations for transmitting and/or receiving multiple spatially multiplexed streams of signals to or from a plural of UEs using the same frequency resource.
    Type: Application
    Filed: January 28, 2018
    Publication date: August 16, 2018
    Applicant: RF DSP Inc.
    Inventors: Ping Liang, Dengkui Zhu, Boyu Li, Yiming Ma
  • Publication number: 20180219703
    Abstract: This invention presents methods for using spatial FFT to reduce the number of computations for generating the pre-coding matrix in a MIMO system comprising reducing the dimension of channel vectors by neglecting entries whose values are significantly smaller or near zero, and to select UEs into a group assigned to the same time and frequency resources.
    Type: Application
    Filed: July 9, 2016
    Publication date: August 2, 2018
    Applicant: RF DSP Inc.
    Inventor: Ping LIANG
  • Publication number: 20180212711
    Abstract: This invention presents a method for uplink SRS transmission in MU-MIMO wireless communication systems comprising the BS reserving resources for SRS transmission and multiplexing the reserved resources among neighboring cells and among multiple UEs allocated to the same SRS transmission resource; the BS estimating the CQI of each UE through the uplink channel; and the BS allocating the same resource to a group of UEs to transmit uplink SRSs based on the estimated CQI and the QoS requirement.
    Type: Application
    Filed: June 28, 2016
    Publication date: July 26, 2018
    Applicant: RF DSP Inc.
    Inventors: Dengkui Zhu, Boyu Li, Ping Liang