公开(公告)号：US12021660B2

公开(公告)日：2024-06-25

申请号：US17376786

申请日：2021-07-15

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Ernest Tsui

IPC: H04L25/02 ,  G06N20/00 ,  H01Q3/26 ,  H04B7/0417 ,  H04B7/0426 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/06 ,  H04B7/08 ,  H04B17/12 ,  H04B17/309 ,  H04B17/318 ,  H04B17/336 ,  H04L5/00 ,  H04L5/14 ,  H04L43/06 ,  H04L43/0888 ,  H04L43/16 ,  H04W16/28 ,  H04W24/02 ,  H04W24/08 ,  H04W52/14 ,  H04W52/26 ,  H04W72/044 ,  H04W72/12 ,  H04W72/23 ,  H04W72/51 ,  H04W72/541 ,  H04W72/566 ,  H04W84/04 ,  H04J11/00

CPC classification number: H04L25/0222 ,  G06N20/00 ,  H01Q3/2617 ,  H01Q3/267 ,  H01Q3/2694 ,  H04B7/0417 ,  H04B7/0426 ,  H04B7/043 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/0469 ,  H04B7/0473 ,  H04B7/0617 ,  H04B7/0632 ,  H04B7/0634 ,  H04B7/0639 ,  H04B7/0645 ,  H04B7/0695 ,  H04B7/088 ,  H04B17/12 ,  H04B17/309 ,  H04B17/318 ,  H04B17/336 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/0051 ,  H04L5/0073 ,  H04L5/14 ,  H04L5/1461 ,  H04L5/1469 ,  H04L25/0202 ,  H04L25/0226 ,  H04L43/06 ,  H04L43/0888 ,  H04L43/16 ,  H04W16/28 ,  H04W24/02 ,  H04W24/08 ,  H04W52/143 ,  H04W52/267 ,  H04W72/0473 ,  H04W72/12 ,  H04W72/23 ,  H04W72/51 ,  H04W72/541 ,  H04W72/569 ,  H04W84/04 ,  H04J11/0023

Abstract: Aspects of the subject disclosure may include, for example, receiving, over an uplink (UL) via a combination of coherent modular antenna arrays, first transmissions from a first user equipment (UE) and second transmissions from a second UE, wherein the first UE and the second UE are being served by the cell in multi-user (Mu)-multiple-input-multiple-output (MIMO) mode, determining, based on the first transmissions and the second transmissions, that a probability of the second UE interfering with the first UE in the UL satisfies a particular threshold, responsive to the determining, identifying an adjustment to an UL transmit power for the first UE, and causing the first UE to implement the adjustment to the UL transmit power. Other embodiments are disclosed.

公开(公告)号：US20230254004A1

公开(公告)日：2023-08-10

申请号：US18299652

申请日：2023-04-12

Applicant: AT&T Intellectual Property I, L.P. ,  AT&T Mobility II LLC

Inventor： Ernest Tsui ,  Michael Taylor ,  Weihua Ye ,  Young Suh ,  Paul Maxwell ,  Guanying Ru ,  James Hollister

IPC: H04B1/525 ,  H04B1/10 ,  H04W72/044 ,  H04W72/21 ,  H04W72/23

CPC classification number: H04B1/525 ,  H04B1/1027 ,  H04W72/046 ,  H04W72/21 ,  H04W72/23

Abstract: Embodiments for port reconfiguration for passive intermodulation interference mitigation are presented herein. A base station device comprises a signal processing component comprising a passive intermodulation interference component and an antenna configuration component. The passive intermodulation interference component determines passive intermodulation interference corresponding to uplink signals that have been received, via a configurable cellular antenna array of the base station device, from respective wireless devices of a group of wireless devices that have been communicatively coupled to the base station device. The antenna configuration component selects a defined configuration of a group of cellular antenna ports of the configurable cellular antenna array to facilitate a reduction of the passive intermodulation interference corresponding to the uplink signals.

公开(公告)号：US11658697B2

公开(公告)日：2023-05-23

申请号：US17092032

申请日：2020-11-06

Applicant: AT&T Intellectual Property I, L.P. ,  AT&T Mobility II LLC

Inventor： Ernest Tsui ,  Michael Taylor ,  Weihua Ye ,  Young Suh ,  Paul Maxwell ,  Guanying Ru ,  James Hollister

IPC: H04B1/525 ,  H04B1/10 ,  H04W72/044 ,  H04W72/21 ,  H04W72/23

CPC classification number: H04B1/525 ,  H04B1/1027 ,  H04W72/046 ,  H04W72/21 ,  H04W72/23

Abstract: Embodiments for port reconfiguration for passive intermodulation interference mitigation are presented herein. A base station device comprises a signal processing component comprising a passive intermodulation interference component and an antenna configuration component. The passive intermodulation interference component determines passive intermodulation interference corresponding to uplink signals that have been received, via a configurable cellular antenna array of the base station device, from respective wireless devices of a group of wireless devices that have been communicatively coupled to the base station device. The antenna configuration component selects a defined configuration of a group of cellular antenna ports of the configurable cellular antenna array to facilitate a reduction of the passive intermodulation interference corresponding to the uplink signals.

公开(公告)号：US20230050488A1

公开(公告)日：2023-02-16

申请号：US17978411

申请日：2022-11-01

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Ernest Tsui ,  Paul Maxwell ,  Brian Gavin

IPC: H04L25/02 ,  H04B7/06 ,  H04B17/318 ,  H04W24/08 ,  H04L5/14 ,  H04W72/12 ,  H04B7/0417 ,  H01Q3/26 ,  H04L43/0888 ,  H04B17/12 ,  H04B7/08 ,  H04B7/0452 ,  H04B7/0456 ,  H04W72/04 ,  H04L5/00 ,  H04W24/02 ,  H04W16/28 ,  H04W84/04 ,  G06N20/00 ,  H04B7/0426 ,  H04B17/336 ,  H04W72/08 ,  H04B17/309 ,  H04W52/14 ,  H04W52/26 ,  H04L43/16 ,  H04J11/00

Abstract: Aspects of the subject disclosure may include, for example, causing a reference antenna element of a first set of antenna elements of a first antenna array to transmit a first signal, determining for each antenna element of a second set of antenna elements of a second antenna array, a receive-related offset, relative to the reference element, based on inter-element propagation delays between the first and second sets of elements, causing each antenna element of the second set of elements to transmit a respective second signal, based on the reference antenna element receiving the respective second signals, calculating a respective transmit-related offset for each antenna element of the second set of antenna elements relative to the reference antenna element based on the inter-element propagation delays, and performing calibration between the first antenna array and the second antenna array based on the respective receive-related and transmit-related offsets. Other embodiments are disclosed.

公开(公告)号：US20230044335A1

公开(公告)日：2023-02-09

申请号：US17972324

申请日：2022-10-24

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Ernest Tsui ,  Paul Maxwell

IPC: H04L25/02 ,  H04L5/14 ,  H04B7/06 ,  H04B17/318 ,  H04B17/336 ,  H04B7/0452 ,  G06N20/00 ,  H04B7/0426 ,  H04B7/0456 ,  H04W24/02 ,  H04W72/04 ,  H04W72/12 ,  H04W84/04 ,  H04L5/00 ,  H04B7/08 ,  H01Q3/26 ,  H04W72/08 ,  H04B7/0417 ,  H04B17/309 ,  H04L43/0888 ,  H04L43/16 ,  H04W52/14 ,  H04W52/26 ,  H04W16/28 ,  H04W24/08 ,  H04B17/12

Abstract: Aspects of the subject disclosure may include, for example, obtaining, over an uplink (UL) using an aggregation of modular antenna arrays, a modulated signal that includes feedback transmitted by a user equipment (UE), wherein the aggregation of modular antenna arrays comprises multiple groups of antenna elements, after the obtaining the modulated signal, performing a demodulation of the modulated signal, determining demodulator constellation errors from the demodulation of the modulated signal, performing an error gradient weight adaptation responsive to the determining the demodulator constellation errors to derive revised weights for various antenna elements of the multiple groups of antenna elements, and applying the revised weights to the various antenna elements of the multiple groups of antenna elements to adjust signals received over the UL. Other embodiments are disclosed.

公开(公告)号：US20230029375A1

公开(公告)日：2023-01-26

申请号：US17957770

申请日：2022-09-30

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Ernest Tsui ,  Paul Maxwell

IPC: H04L25/02 ,  H04L5/14 ,  H04B7/06 ,  H04B17/318 ,  H04B17/336 ,  H04B7/0452 ,  G06N20/00 ,  H04B7/0426 ,  H04B7/0456 ,  H04W24/02 ,  H04W72/04 ,  H04W72/12 ,  H04W84/04 ,  H04L5/00 ,  H04B7/08 ,  H01Q3/26 ,  H04W72/08 ,  H04B7/0417 ,  H04B17/309 ,  H04L43/0888 ,  H04L43/16 ,  H04W52/14 ,  H04W52/26 ,  H04W16/28 ,  H04W24/08 ,  H04B17/12

Abstract: Aspects of the subject disclosure may include, for example, receiving sounding reference signal (SRS) symbols from antenna elements of each of multiple modular antenna arrays, wherein the multiple modular antenna arrays are operatively combined to form a coherent antenna system, performing an uplink (UL) channel estimation and a downlink (DL) channel estimation, across a plurality of physical resource blocks (PRBs), based on the SRS symbols, calculating, for the antenna elements, a plurality of uplink (UL) combining weights based on the UL channel estimation and a plurality of downlink (DL) precoder weights based on the DL channel estimation, and causing the plurality of UL combining weights and the plurality of DL precoder weights to be applied to the antenna elements, thereby adjusting beamforming of the coherent antenna system. Other embodiments are disclosed.

公开(公告)号：US11533199B2

公开(公告)日：2022-12-20

申请号：US17376831

申请日：2021-07-15

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Ernest Tsui ,  Paul Maxwell

IPC: H04L5/12 ,  H04L25/02 ,  H04L5/14 ,  H04B7/06 ,  H04B17/318 ,  H04B17/336 ,  H04B7/0452 ,  G06N20/00 ,  H04B7/0426 ,  H04B7/0456 ,  H04W24/02 ,  H04W72/04 ,  H04W72/12 ,  H04W84/04 ,  H04L5/00 ,  H04B7/08 ,  H01Q3/26 ,  H04W72/08 ,  H04B7/0417 ,  H04B17/309 ,  H04L43/0888 ,  H04L43/16 ,  H04W52/14 ,  H04W52/26 ,  H04W16/28 ,  H04W24/08 ,  H04B17/12 ,  H04J11/00

Abstract: Aspects of the subject disclosure may include, for example, obtaining, over an uplink (UL) using an aggregation of modular antenna arrays, a modulated signal that includes feedback transmitted by a user equipment (UE), wherein the aggregation of modular antenna arrays comprises multiple groups of antenna elements, after the obtaining the modulated signal, performing a demodulation of the modulated signal, determining demodulator constellation errors from the demodulation of the modulated signal, performing an error gradient weight adaptation responsive to the determining the demodulator constellation errors to derive revised weights for various antenna elements of the multiple groups of antenna elements, and applying the revised weights to the various antenna elements of the multiple groups of antenna elements to adjust signals received over the UL. Other embodiments are disclosed.

公开(公告)号：US20220278875A1

公开(公告)日：2022-09-01

申请号：US17376735

申请日：2021-07-15

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Ernest Tsui

IPC: H04L25/02 ,  H04B7/06 ,  H04B7/0452 ,  H04L5/14

Abstract: Aspects of the subject disclosure may include, for example, receiving, via a combination of coherent modular antenna panels, pilot signals from a user equipment (UE) in single-user (Su)-multiple-input-multiple-output (MIMO) mode, wherein each modular antenna panel of the combination of coherent modular antenna panels comprises a group of antenna elements, resulting in multiple groups of antenna elements, and estimating an UL channel for the UE and a DL channel for the UE using channel vectors derived from the pilot signals, resulting in reciprocity-based channel estimation, wherein the estimating the DL channel using the channel vectors derived from the pilot signals reduces or eliminates a need to transmit, using each antenna element in the multiple groups of antenna elements, DL pilot signals for DL channel estimation, thereby reducing or eliminating overhead for the UE. Other embodiments are disclosed.

公开(公告)号：US20220278713A1

公开(公告)日：2022-09-01

申请号：US17376721

申请日：2021-07-15

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Ernest Tsui

IPC: H04B7/0417 ,  H04B7/06 ,  H04B7/0452 ,  H04B7/0456 ,  H04B17/336 ,  H04W16/28

Abstract: Aspects of the subject disclosure may include, for example, obtaining information regarding an external source that might be affected by downlink (DL) transmissions emitted by an aggregation of modular antenna arrays, wherein each modular antenna array of the aggregation of modular antenna arrays comprises a set of antenna elements, resulting in multiple sets of antenna elements, and wherein the aggregation of modular antenna arrays is operated in multi-user (Mu)-multiple-input-multiple-output (MIMO) mode in which parallel transmissions are facilitated for a plurality of user equipment (UEs), determining adjustments for particular antenna elements of the multiple sets of antenna elements based on the obtaining the information, wherein the determining the adjustments is based on a probability that interference of the parallel transmissions with the external source will be mitigated, and causing the particular antenna elements to be operated based on the adjustments. Other embodiments are disclosed.

公开(公告)号：US10039022B2

公开(公告)日：2018-07-31

申请号：US14734766

申请日：2015-06-09

Applicant: AT&T Mobility II LLC ,  AT&T Intellectual Property I, L.P.

Inventor： Ernest Tsui ,  Peter Richard Wong ,  Paul Maxwell ,  Young Suh

IPC: H04W24/08 ,  H04B17/345 ,  H04B17/00 ,  H04B17/391

CPC classification number: H04W24/08 ,  H04B17/0085 ,  H04B17/345 ,  H04B17/3912

Abstract: A passive intermodulation detection system is provided to remotely identify passive intermodulation at a base station site and diagnose the type of intermodulation and location of the non-linearity that is the source of the passive intermodulation. The passive intermodulation detection system can generate a test signal in a first band that is transmitted by an antenna. Another antenna can receive a signal in another band, and the passive intermodulation detection system can analysis the received signal to determine whether an intermodulation product due to a non-linearity is present. Based on the type of intermodulation product, period, order, frequency, and etc., the type and location of the non-linearity can be identified.