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    Method, system and device for measuring channel state information
    11.
    发明授权
    Method, system and device for measuring channel state information 有权

    公开(公告)号：US10333605B2

    公开(公告)日：2019-06-25

    申请号：US15303657

    申请日：2015-04-22

    Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY

    Inventor： Xin Su ,  Chuanjun Li

    IPC: H04B7/0413 ,  H04W24/08 ,  H04W16/28 ,  H04L5/00 ,  H04B7/12 ,  H04B7/06 ,  H04B7/04 ,  H04W88/02 ,  H04B7/0452

    Abstract: The present disclosure relates to the field of wireless communication technology, in particular to a method, system and device for measuring CSI, so as to solve the problem in the related art where, on the premise that a Massive MIMO technology plays to its strengths, a CSI measurement and feedback mechanism on the basis of a downlink reference signal may lead to obvious time-frequency resource overhead. The method includes steps of: transmitting, by a network side device, a group of reference signals which have been beamformed to a User Equipment (UE), so as to enable the UE to measure the reference signals, each reference signal in the group of reference signals corresponding to a space in a sector; and determining, by the network side device, whether or not a beamforming mode for each reference signal is to be adjusted in accordance with feedback information from the UE. According to the present disclosure, it is able to, on the premise that the Massive MIMO technology plays to its strengths, reduce the time-frequency resource overhead caused by the measurement and feedback of the downlink reference signals.

    Active antenna associated device and system, and transmitting and receiving calibration method
    12.
    发明授权
    Active antenna associated device and system, and transmitting and receiving calibration method 有权

    公开(公告)号：US10305183B2

    公开(公告)日：2019-05-28

    申请号：US15310702

    申请日：2015-05-14

    Applicant: China Academy of Telecommunications Technology

    Inventor： Chuanjun Li ,  Xin Su

    IPC: H01Q1/24 ,  H01Q5/22 ,  H01Q9/06 ,  H04B17/11 ,  H04B1/10 ,  H04B7/06 ,  H04B1/04

    Abstract: An active antenna associated device and system, and a transmitting and receiving calibration method, used for implementing extensible design of an antenna array, reducing construction implementation difficulty, and ensuring construction implementation reliability. The active antenna unit comprises: N active antenna arrays, a main calibration coupling circuit unit, a transmitting and receiving calibrating unit, a calibration parameter storage unit, and a radio over fiber (ROF) photoelectric conversion unit, wherein N is larger than 1. Each active antenna array at least comprises an antenna calibration coupling circuit unit and M antenna oscillators connected to the antenna calibration coupling circuit unit, wherein M is larger than 1. The antenna calibration coupling circuit units of the active antenna arrays are connected to the main calibration coupling circuit unit through a calibration radio frequency channel. The main calibration coupling circuit is connected with the transmitting and receiving calibrating unit. The transmitting and receiving calibrating unit and the calibration parameter storage unit are respectively connected to the ROF photoelectric conversion unit.

    METHOD AND DEVICE FOR TRAINING DOWNLINK BEAMS
    13.
    发明申请
    METHOD AND DEVICE FOR TRAINING DOWNLINK BEAMS 有权

    公开(公告)号：US20210344407A1

    公开(公告)日：2021-11-04

    申请号：US16324880

    申请日：2017-08-03

    Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY

    Inventor： Qiuping HUANG ,  Qiubin GAO ,  Runhua Chen ,  Hui Li ,  Rakesh Tamrakar ,  Yang Song ,  Xin Su ,  Yu Yang ,  Mengjun Wang ,  Chuanjun Li

    IPC: H04B7/08 ,  H04B7/0408 ,  H04B7/06

    Abstract: A method and a device for transmitting downlink reception beam training signals are provided. The method at the second device side includes: receiving a downlink reception beam training trigger notification message sent by a first device; receiving downlink reception beam training signals sent by the first device, based on the downlink reception beam training trigger notification message; and performing a downlink reception beam training based on the downlink reception beam training signals. The method at the first device side includes: sending a downlink reception beam training trigger notification message to a second device when determining that a downlink reception beam training is to be performed for the second device, and sending downlink reception beam training signals to the second device after the downlink reception beam training trigger notification message is sent to the second device.

    Method for determining MIMO detection matrix of scheduled UE
    17.
    发明授权
    Method for determining MIMO detection matrix of scheduled UE 有权

    公开(公告)号：US10892785B2

    公开(公告)日：2021-01-12

    申请号：US16066226

    申请日：2016-11-28

    Applicant: China Academy of Telecommunications Technology

    Inventor： Xin Su ,  Yang Song ,  Chuanjun Li

    IPC: H04B1/00 ,  H04B1/10 ,  H04L25/03 ,  H04W88/08

    Abstract: The present application discloses a method and an apparatus for signal processing. In the present application, since a front end device in a base station system performs MIMO detection and related baseband-processing of a time domain signal received from an antenna unit and transmits the signal that is baseband-processed to a back end device of the base station system, the back end device merely performs other baseband processing, apart from the MIMO detection and the related baseband processing. Compared with the prior art, the embodiments of the present application move some of the baseband processing forward to be implemented on a front end device such that only the data of each scheduled user with less redundancy are required to be transmitted in an interface between the front end device and a backend device, reducing the pressure on the rate of data transmission between the front end device and the back end device.

    Method and apparatus for phase compensation using phase-tracking reference signal
    18.
    发明授权
    Method and apparatus for phase compensation using phase-tracking reference signal 有权

    公开(公告)号：US10862644B2

    公开(公告)日：2020-12-08

    申请号：US16349014

    申请日：2017-12-28

    Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY

    Inventor： Hui Li ,  Qiubin Gao ,  Rakesh Tamrakar ,  Xin Su ,  Runhua Chen ,  Qiuping Huang ,  Chuanjun Li ,  Mengjun Wang

    IPC: H04L5/00 ,  H04B7/0456

    Abstract: The present disclosure provides a reference signal transmission method, a transmitter and a receiver. The reference signal transmission method includes: precoding, by a transmitter, a data stream for user data through a second precoding matrix so as to acquire D virtual data streams; precoding, by the transmitter, the D virtual data streams through a first precoding matrix, and transmitting the D precoded virtual data streams to a receiver via T antenna groups, each antenna group including one or more antenna units or antenna ports having a same phase noise; transmitting, by the transmitter, D demodulation reference signals to the receiver; and transmitting, by the transmitter, M phase-tracking reference signals to the receiver, the M phase-tracking reference signals being adopted to track phase changes in the T antenna groups caused by one or more phase noise sources.

    Active antenna device and test method therefor
    19.
    发明授权
    Active antenna device and test method therefor 有权

    公开(公告)号：US10536227B2

    公开(公告)日：2020-01-14

    申请号：US16060263

    申请日：2016-11-22

    Applicant: China Academy of Telecommunications Technology

    Inventor： Chuanjun Li ,  Xin Su ,  Yuexia Song ,  Shouning Jiang

    IPC: G01R29/10 ,  H04B17/12 ,  H04B17/21 ,  H04B17/29 ,  H04B17/17 ,  H01Q5/335 ,  H01Q5/50 ,  H01Q1/24

    Abstract: Disclosed are an active antenna device and a test method therefor, for resolving the problem that existing large-scale active antennae cannot be tested by using a traditional test method due to no traditional antenna connectors. The active antenna device comprises: a transceiver array, a radio frequency calibration and test distribution network unit, an antenna passive distribution network unit, an antenna array, and S test connectors, wherein the radio frequency calibration and test distribution network unit is connected to the transceiver array through N data channels and M calibration channels respectively and is connected to the test connectors, and the antenna passive distribution network unit is connected to the radio frequency calibration and test distribution network unit through N data channels and is connected to the antenna array through P data channels, N being a positive integer greater than or equal to 1, M being a positive integer greater than or equal to 1, P being a positive integer greater than or equal to 1, and S being a positive integer greater than or equal to 1.

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