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    System and method for designing low-complexity linear receivers for OTFS system
    1.
    发明授权
    System and method for designing low-complexity linear receivers for OTFS system 有权

    公开(公告)号：US12107659B2

    公开(公告)日：2024-10-01

    申请号：US18058893

    申请日：2022-11-28

    Applicant: INDIAN INSTITUTE OF TECHNOLOGY KANPUR

    Inventor： Prem Singh ,  Rohit Budhiraja

    IPC: H04B7/08 ,  H04B7/0456

    CPC classification number: H04B7/0854 ,  H04B7/0456

    Abstract: A method for designing a low-complexity linear minimum mean squared error (LMMSE) and zero-forcing (ZF) receivers for MIMO-RCP-OTFS system is disclosed. The method includes steps of: computing a received signal vector (r) and structure of a matrix (Ψ) using a channel matrix (H); reordering the matrix (Ψ) to reduce bandwidth of the matrix (Ψ); computing inverse of a banded matrix (G=LU) by multiplying the matrix (Ψ) with permutation matrix (P) and with transpose of permutation matrix (PT) using Cholskey decomposition; calculating LMSSE/ZF equalized vector ({tilde over (r)}ce) by multiplying inverse of banded matrices with Bw bandwidth (L and U), with the received signal vector (r=Pr) using forward and backward substitution algorithms; reordering the vector ({tilde over (r)}ce) to calculate vector (y); and calculating data vector ({circumflex over (d)}) representing an estimation of low-complexity LMMSE/ZF equalization by multiplying Hermitian matrix (B) with the vector (y).

    Low-power auto-correlation antenna selection for multi-antenna system
    3.
    发明授权
    Low-power auto-correlation antenna selection for multi-antenna system 有权

    公开(公告)号：US12088392B2

    公开(公告)日：2024-09-10

    申请号：US18105913

    申请日：2023-02-06

    Applicant: Qorvo US, Inc.

    Inventor： Andrew Fort

    IPC: H04B7/08 ,  H04B7/06

    CPC classification number: H04B7/0854 ,  H04B7/0608 ,  H04B7/0639 ,  H04B7/0802

    Abstract: Systems and methods for low-power auto-correlation antenna selection for multi-antenna systems are disclosed. In particular, a computing device, such as an Internet of Things (IoT) computing device, may include a transceiver operating with multiple antennas. For example, the computing device may operate under a low-power wireless standard such as Long Range BLUETOOTH LOW ENERGY (LR BLE). In an exemplary aspect, an antenna from amongst the multiple antennas may be selected based on which antenna is receiving a best copy of a periodic signal. The periodic signal is likely indicative of a preamble pattern and, as such, may be used to activate a cross-correlation circuit for signal detection confirmation. Power consumption is reduced by delaying activation of the cross-correlation circuit until a likely signal is detected by detection of the periodic signal.

    CORRELATING SIMULATED SIGNAL AND SATELLITE DOWNLINK SIGNAL
    4.
    发明公开
    CORRELATING SIMULATED SIGNAL AND SATELLITE DOWNLINK SIGNAL 审中-公开

    公开(公告)号：US20240283854A1

    公开(公告)日：2024-08-22

    申请号：US18635660

    申请日：2024-04-15

    Applicant: Microsoft Technology Licensing, LLC

    Inventor： Tusher CHAKRABORTY ,  Ranveer CHANDRA ,  Nissanka Arachchige Bodhi PRIYANTHA ,  Vaibhav SINGH

    IPC: H04L69/22 ,  H04B7/08 ,  H04L69/00

    CPC classification number: H04L69/22 ,  H04B7/0854 ,  H04L69/03

    Abstract: A computing system including a processor configured to receive packet preamble binary data and packet header binary data associated with a satellite. The processor may generate a simulated signal that encodes the packet preamble binary data and the packet header binary data. The processor may receive a satellite downlink signal. Within each of a plurality of sample intervals of the satellite downlink signal, the processor may compute a respective correlation between the satellite downlink signal and at least a portion of the simulated signal. The processor may select an identified sample interval of the plurality of sample intervals based at least in part on the plurality of correlations. The processor may decode binary satellite signal data based at least in part on the identified sample of the satellite downlink signal. The processor may output the binary satellite signal data.

    Electronic device with antennas and method of the same
    6.
    发明授权
    Electronic device with antennas and method of the same 有权

    公开(公告)号：US11979209B2

    公开(公告)日：2024-05-07

    申请号：US17828512

    申请日：2022-05-31

    Applicant: Samsung Electronics Co., Ltd.

    Inventor： Sungchul Park ,  Boon Loong Ng ,  Suha Yoon

    IPC: H04B7/04 ,  H04B7/0456 ,  H04B7/06 ,  H04B7/08

    CPC classification number: H04B7/0473 ,  H04B7/0608 ,  H04B7/0628 ,  H04B7/0854

    Abstract: An electronic device is provided. The electronic device includes a plurality of antennas, communication circuit, and a processor operatively connected to the communication circuit. The processor may be configured to transmit capability information of the electronic device to a base station, transmit channel state information measured based on a reference signal received through the plurality of antennas from the base station, receive antenna control information determined based on at least one of the capability information and the channel state information from the base station, and drive the plurality of antennas by selecting one of a polarization multiple-input multiple-output (MIMO) mode and a spatial MIMO mode based on the antenna control information.

    SCALABLE HERMITIAN MATRIX INVERSION
    7.
    发明公开
    SCALABLE HERMITIAN MATRIX INVERSION 审中-公开

    公开(公告)号：US20240106517A1

    公开(公告)日：2024-03-28

    申请号：US17934564

    申请日：2022-09-22

    Applicant: QUALCOMM Incorporated

    Inventor： Wenquan HU ,  Andrea GARAVAGLIA

    IPC: H04B7/08

    CPC classification number: H04B7/0854

    Abstract: An apparatus may be configured to obtain one or more of data or at least one signal associated with at least one first matrix, where the at least one first matrix is at least one square matrix; perform a decomposition process on the at least one first matrix to obtain at least one first triangular matrix; estimate an inverse of the at least one first triangular matrix based on the at least one second triangular matrix; calculate an inverse of the at least one first matrix based on at least one of (1) the estimated inverse of the at least one second triangular matrix, or (2) the estimated inverse of the at least one first triangular matrix; and transmit one or more of the data or the at least one signal based on the calculated inverse of the at least one first matrix.

    System and method for real-time multiplexing phased array antennas to modems
    8.
    发明授权
    System and method for real-time multiplexing phased array antennas to modems 有权

    公开(公告)号：US11715876B2

    公开(公告)日：2023-08-01

    申请号：US16928126

    申请日：2020-07-14

    Applicant: WAFER LLC

    Inventor： Greg Wyler

    IPC: H01Q3/36 ,  H04B7/0456 ,  H04B7/08 ,  H04B7/185

    CPC classification number: H01Q3/36 ,  H04B7/0486 ,  H04B7/0817 ,  H04B7/0854 ,  H04B7/0857 ,  H04B7/18515

    Abstract: A system having a platform upon which several phased antenna arrays are mounted and which can communicate with satellites. The system includes a switch that can connect any of the phased array antennas to any of available modems. The system further includes a router that can connect any of the modems to any available computing devices. Based on parameters such as data rates, signal strength, and account information, one or more communication paths are selected for a computing device requesting to communicate with a satellite. Each communication path is established by operating the switch to connect a selected antenna to a selected modem, and operating the router to transfer data between the computing device and the selected modem.

    DETERMINATION OF COMPLEX WEIGHT VECTORS FOR A RADIO TRANSCEIVER DEVICE
    9.
    发明申请
    DETERMINATION OF COMPLEX WEIGHT VECTORS FOR A RADIO TRANSCEIVER DEVICE 审中-公开

    公开(公告)号：US20180375552A1

    公开(公告)日：2018-12-27

    申请号：US15543865

    申请日：2017-06-27

    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

    Inventor： Fredrik ATHLEY ,  Andreas NILSSON ,  Sven PETERSSON

    IPC: H04B7/0456 ,  H04B7/06 ,  H04B7/08 ,  H01Q3/26 ,  H01Q3/40

    CPC classification number: H04B7/0456 ,  H01Q3/2652 ,  H01Q3/40 ,  H04B7/0617 ,  H04B7/063 ,  H04B7/0695 ,  H04B7/0854 ,  H04B7/088

    Abstract: There is provided mechanisms for determining complex weight vectors. A method is performed by a radio transceiver device. The method comprises obtaining measurements of reference signals. The reference signals are transmitted by another radio transceiver device by applying precoding weight vectors in a sequential order at an analog antenna array of said another radio transceiver device. The precoding weight vectors as well as the sequential order are known to the radio transceiver device. The method comprises determining channel estimates for each individual antenna element of the antenna array by using the measurements in combination with knowledge of the precoding weight vectors and the sequential order. The method comprises determining complex weight vectors to be used for subsequent data transmission from said another radio transceiver device based on the channel estimates. The method comprises providing an indication of the complex weight vectors to said another radio transceiver device.

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