公开(公告)号：US11870519B2

公开(公告)日：2024-01-09

申请号：US17887654

申请日：2022-08-15

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

Inventor： Salam Akoum ,  Aditya Chopra ,  Milap Majmundar

IPC: H04W84/12 ,  H04L5/00 ,  H04B7/0456

CPC classification number: H04B7/0456 ,  H04L5/0053

Abstract: Aspects of the subject disclosure may include, for example, obtaining compressed sounding reference signal (SRS) information associated with a user end device from a distributed unit device. The distributed unit device compresses SRS information utilizing a first compression algorithm resulting in the compressed SRS information. Further embodiments include decompressing the compressed SRS information utilizing a first decompression algorithm resulting in the SRS information and determining SRS channel estimation based on the SRS information. Additional embodiments include determining a group of beamforming weights based on the SRS channel estimation, and adjusting an antenna array according to the group of beamforming weights. Other embodiments are disclosed.

公开(公告)号：US20230344483A1

公开(公告)日：2023-10-26

申请号：US17866644

申请日：2022-07-18

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

Inventor： Salam Akoum ,  Aditya Chopra ,  Milap Majmundar

IPC: H04B7/06 ,  H04L25/02 ,  H04L5/00 ,  H04B7/0417

CPC classification number: H04B7/0619 ,  H04L25/0224 ,  H04L5/0051 ,  H04B7/0417 ,  H04B7/0617

Abstract: Aspects of the subject disclosure may include, for example, a system comprising a distributed unit (DU) configured to generate sounding reference signal (SRS)-based beams, and a remote unit (RU) communicatively coupled with the DU over a fronthaul, wherein the RU is configured to generate demodulation reference signal (DMRS)-based beams and perform digital beamforming for an uplink using the DMRS-based beams in combination with the SRS-based beams. Other embodiments are disclosed.

公开(公告)号：US20230344474A1

公开(公告)日：2023-10-26

申请号：US17887654

申请日：2022-08-15

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

Inventor： Salam Akoum ,  Aditya Chopra ,  Milap Majmundar

IPC: H04B7/0456

CPC classification number: H04B7/0456 ,  H04L5/0053

Abstract: Aspects of the subject disclosure may include, for example, obtaining compressed sounding reference signal (SRS) information associated with a user end device from a distributed unit device. The distributed unit device compresses SRS information utilizing a first compression algorithm resulting in the compressed SRS information. Further embodiments include decompressing the compressed SRS information utilizing a first decompression algorithm resulting in the SRS information and determining SRS channel estimation based on the SRS information. Additional embodiments include determining a group of beamforming weights based on the SRS channel estimation, and adjusting an antenna array according to the group of beamforming weights. Other embodiments are disclosed.

公开(公告)号：US20230140205A1

公开(公告)日：2023-05-04

申请号：US17983840

申请日：2022-11-09

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

Inventor： Sairamesh Nammi ,  Arunabha Ghosh ,  Aditya Chopra ,  Saeed Ghassemzadeh

IPC: H03M13/25 ,  H03M13/11 ,  H03M13/09 ,  H03M13/37

Abstract: Aspects of the subject disclosure may include, for example, obtaining a received channel-encoded data block having information bits, a transmitted error-check value, and redundant code bits. The redundant code bits correspond to a channel code applied to the received channel-encoded data block prior to transmission via a communication channel. A channel code type is identified and responsive to it being systematic, the information bits and the transmitted error-check value are obtained without decoding according to the channel code. The received channel-encoded data block is checked according to the transmitted error-check value to obtain a result. Responsive to the result not indicating an error, extracting the information bits without decoding the received channel-encoded data block according to the channel code. Responsive to the result indicating an error, decoding the received channel-encoded data block according to the channel code to obtain decoded information bits. Other embodiments are disclosed.

公开(公告)号：US11627519B2

公开(公告)日：2023-04-11

申请号：US17808156

申请日：2022-06-22

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

Inventor： Ralf Bendlin ,  Aditya Chopra ,  Arunabha Ghosh ,  Abdulrauf Hafeez

IPC: H04W4/00 ,  H04W48/16 ,  H04W4/70 ,  H04W16/14

Abstract: Discontinuous access to unlicensed spectrum is facilitated in a new radio access environment. According to an embodiment, a system can comprise performing a scanning procedure that determines whether a first subband and a second subband is available for transmission. The system can further facilitate determining whether the first subband and the second subband are adjacent, wherein a first channel formed at the first subband comprising a first guard band and a second channel formed at the second subband comprising a second guard band that is adjacent to the first guard band. The system can further facilitate in response to determining that the first subband and the second subband are adjacent and available for transmission, eliminating the first guard band and the second guard band.

公开(公告)号：US20230085664A1

公开(公告)日：2023-03-23

申请号：US17994755

申请日：2022-11-28

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

Inventor： Aditya Chopra ,  Andrew Thornburg ,  Saeed Ghassemzadeh

IPC: H04W72/04 ,  H04L5/00 ,  H04B7/0413

Abstract: Aspects of the subject disclosure may include, for example, a base station that includes a phased array antenna system and a MIMO antenna system. The MIMO antenna system may receive sounding signals sent by user equipment (UE) and determine angular location information for each UE. The angular location information may be used by the phased array antenna system to create antenna beams. The angular location information may also be used to schedule communications with multiple UEs in common beams. Other embodiments are disclosed.

公开(公告)号：US11581928B2

公开(公告)日：2023-02-14

申请号：US17192972

申请日：2021-03-05

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

Inventor： Aditya Chopra ,  Andrew Thornburg ,  Saeed Ghassemzadeh

IPC: H04B7/06 ,  H04L25/02 ,  H04B7/08

Abstract: Aspects of the subject disclosure may include, for example, a base station that includes a phased array antenna system and a MIMO antenna system. The MIMO antenna system may receive sounding signals sent by user equipment (UE) and determine angular location information for each UE. The angular location information may be used by the phased array antenna system to create antenna beams. The angular location information may also be used to schedule communications with multiple UEs in common beams. Other embodiments are disclosed.

公开(公告)号：US20230006871A1

公开(公告)日：2023-01-05

申请号：US17943725

申请日：2022-09-13

Applicant: AT&T Intellectual Property I, L.P. ,  University of Notre Dame du Lac

Inventor： Ralf Bendlin ,  Aditya Chopra ,  Bertrand Martyn Hochwald ,  Nicholas Joseph Estes ,  Jonathan David Chisum ,  Kang Gao

IPC: H04L27/22 ,  H04B7/0413

Abstract: Aspects of the subject disclosure may include, a non-linear energy detector that obtains baseband information from a mixed signal that corresponds to an information component of a received radio frequency (RF) signal, wherein the mixed signal comprises a local oscillator signal combined, without multiplication, with the received RF signal, wherein the received RF signal comprises a carrier wave component operating at a carrier frequency within a millimeter wave spectrum, wherein the non-linear energy detector is associated with a non-linear current-voltage (I-V) characteristic curve, and wherein the baseband information is obtained by applying the mixed signal to the non-linear I-V characteristic curve. Other embodiments are disclosed.

公开(公告)号：US20220312404A1

公开(公告)日：2022-09-29

申请号：US17212940

申请日：2021-03-25

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

Inventor： Aditya Chopra ,  Andrew Thornburg ,  Milap Majmundar

IPC: H04W72/04

Abstract: Disaggregated wireless radio access networks can utilize a lower physical split architecture with open fronthaul between the radio unit and distributed baseband units. A split architecture is one in which the analogue radio front-end and the digital baseband processor in a radio are not co-located. Instead, these components are connected via a fronthaul transport network. Therefore, the baseband unit can transmit two beamforming matrices for every contiguous resource block occupied by a user. The radio unit can then interpolate between these two beamforming matrices for each of the RE inside of the resource block based on the baseband unit and the radio unit agreeing upon a method of interpolation to generate beamforming matrices per resource element.

公开(公告)号：US20220286169A1

公开(公告)日：2022-09-08

申请号：US17192972

申请日：2021-03-05

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

Inventor： Aditya Chopra ,  Andrew Thornburg ,  Saeed Ghassemzadeh

IPC: H04B7/06 ,  H04B7/08 ,  H04L25/02

Abstract: Aspects of the subject disclosure may include, for example, a base station that includes a phased array antenna system and a MIMO antenna system. The MIMO antenna system may receive sounding signals sent by user equipment (UE) and determine angular location information for each UE. The angular location information may be used by the phased array antenna system to create antenna beams. The angular location information may also be used to schedule communications with multiple UEs in common beams. Other embodiments are disclosed.